chore: merge hare/develop into companion work

crates/client/Cargo.toml

@@ -5,6 +5,7 @@ edition.workspace = true
 license.workspace = true
 
 [dependencies]
+async-trait.workspace = true
 chrono = { version = "0.4", default-features = false, features = ["clock"] }
 protocol = { workspace = true }
 ticket = { workspace = true }

crates/client/src/backend_runtime.rs

@@ -1,13 +1,7 @@
-use crate::{BackendApiClient, BackendApiClientError};
-use futures::{SinkExt, StreamExt};
-use protocol::stream::{decode_event, encode_method};
-use protocol::{ErrorCode, Event, Method};
+use crate::transport::websocket::{Socket as WebSocket, SocketError as WebSocketError};
+use crate::{BackendApiClient, BackendApiClientError, Client};
 use reqwest::Method as HttpMethod;
-use std::collections::VecDeque;
 use std::fmt;
-use tokio::sync::mpsc;
-use tokio_tungstenite::connect_async;
-use tokio_tungstenite::tungstenite::Message as TungsteniteMessage;
 use tokio_tungstenite::tungstenite::client::IntoClientRequest;
 use tokio_tungstenite::tungstenite::http::HeaderValue;
 use tokio_tungstenite::tungstenite::http::header::AUTHORIZATION;
@@ -106,20 +100,12 @@ impl BackendRuntimeListTarget {
     }
 }
 
-#[derive(Debug)]
-pub struct BackendRuntimeClient {
-    target: BackendRuntimeTarget,
-    command_tx: mpsc::UnboundedSender<Method>,
-    events: mpsc::UnboundedReceiver<Event>,
-    diagnostics: VecDeque<Event>,
-    _protocol_task: tokio::task::JoinHandle<()>,
-}
-
 #[derive(Debug)]
 pub enum BackendRuntimeClientError {
     InvalidTarget(String),
     Api(BackendApiClientError),
     Http(reqwest::Error),
+    Protocol(String),
 }
 
 impl fmt::Display for BackendRuntimeClientError {
@@ -128,6 +114,7 @@ impl fmt::Display for BackendRuntimeClientError {
             Self::InvalidTarget(message) => f.write_str(message),
             Self::Api(error) => write!(f, "{error}"),
             Self::Http(error) => write!(f, "{error}"),
+            Self::Protocol(message) => f.write_str(message),
         }
     }
 }
@@ -282,151 +269,22 @@ pub async fn restore_backend_worker(
     Ok(response.json::<BackendWorkerRestoreResponse>().await?)
 }
 
-impl BackendRuntimeClient {
-    pub async fn connect(target: BackendRuntimeTarget) -> Result<Self, BackendRuntimeClientError> {
-        validate_target(&target)?;
-        let api = BackendApiClient::from_stored_token(&target.base_url)?;
-        let (event_tx, rx) = mpsc::unbounded_channel();
-        let (command_tx, command_rx) = mpsc::unbounded_channel();
-
-        let protocol_target = target.clone();
-        let protocol_event_tx = event_tx.clone();
-        let protocol_task = tokio::spawn(async move {
-            run_worker_protocol_transport(protocol_target, api, command_rx, protocol_event_tx)
-                .await;
-        });
-
-        Ok(Self {
-            target,
-            command_tx,
-            events: rx,
-            diagnostics: VecDeque::new(),
-            _protocol_task: protocol_task,
-        })
-    }
-
-    pub fn try_next_event(&mut self) -> Option<Event> {
-        if let Some(event) = self.diagnostics.pop_front() {
-            return Some(event);
-        }
-        self.events.try_recv().ok()
-    }
-
-    pub async fn next_event(&mut self) -> Option<Event> {
-        if let Some(event) = self.diagnostics.pop_front() {
-            return Some(event);
-        }
-        self.events.recv().await
-    }
-
-    pub async fn send(&mut self, method: &Method) -> Result<(), BackendRuntimeClientError> {
-        self.command_tx.send(method.clone()).map_err(|_| {
-            BackendRuntimeClientError::InvalidTarget(format!(
-                "Backend protocol command stream is closed for {}",
-                self.target.display_label()
-            ))
-        })?;
-        Ok(())
-    }
-}
-
-impl Drop for BackendRuntimeClient {
-    fn drop(&mut self) {
-        self._protocol_task.abort();
-    }
-}
-
-async fn run_worker_protocol_transport(
+pub async fn connect_backend_runtime(
     target: BackendRuntimeTarget,
-    api: BackendApiClient,
-    mut commands: mpsc::UnboundedReceiver<Method>,
-    tx: mpsc::UnboundedSender<Event>,
-) {
-    let request = match protocol_ws_request(&target, &api) {
-        Ok(request) => request,
-        Err(error) => {
-            let _ = tx.send(diagnostic_event(format!(
-                "Backend protocol request could not be constructed for {}: {error}",
-                target.display_label()
-            )));
-            return;
-        }
-    };
-    match connect_async(request).await {
-        Ok((ws, _)) => {
-            let (mut sink, mut stream) = ws.split();
-            loop {
-                tokio::select! {
-                    maybe_method = commands.recv() => {
-                        let Some(method) = maybe_method else {
-                            break;
-                        };
-                        match encode_method(&method) {
-                            Ok(text) => {
-                                if let Err(error) = sink.send(TungsteniteMessage::Text(text.into())).await {
-                                    let _ = tx.send(diagnostic_event(format!(
-                                        "Backend protocol command send failed for {}: {error}",
-                                        target.display_label()
-                                    )));
-                                    break;
-                                }
-                            }
-                            Err(error) => {
-                                let _ = tx.send(diagnostic_event(format!(
-                                    "Backend protocol command could not serialize method for {}: {error}",
-                                    target.display_label()
-                                )));
-                            }
-                        }
-                    }
-                    frame = stream.next() => {
-                        match frame {
-                            Some(Ok(TungsteniteMessage::Text(text))) => {
-                                match decode_event(&text) {
-                                    Ok(event) => {
-                                        let _ = tx.send(event);
-                                    }
-                                    Err(error) => {
-                                        let _ = tx.send(diagnostic_event(format!(
-                                            "Backend protocol response was not valid Event JSON for {}: {error}",
-                                            target.display_label()
-                                        )));
-                                    }
-                                }
-                            }
-                            Some(Ok(TungsteniteMessage::Close(_))) | None => {
-                                let _ = tx.send(diagnostic_event(format!(
-                                    "Backend protocol command stream closed for {}",
-                                    target.display_label()
-                                )));
-                                break;
-                            }
-                            Some(Ok(TungsteniteMessage::Ping(_)))
-                            | Some(Ok(TungsteniteMessage::Pong(_)))
-                            | Some(Ok(TungsteniteMessage::Binary(_)))
-                            | Some(Ok(TungsteniteMessage::Frame(_))) => {}
-                            Some(Err(error)) => {
-                                let _ = tx.send(diagnostic_event(format!(
-                                    "Backend protocol WebSocket error for {}: {error}",
-                                    target.display_label()
-                                )));
-                                break;
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        Err(error) => {
-            let message = protocol_connect_error_message(&target, &api, &error);
-            let _ = tx.send(diagnostic_event(message));
-            while commands.recv().await.is_some() {
-                let _ = tx.send(diagnostic_event(format!(
-                    "Backend protocol command was not sent because command stream is unavailable for {}",
-                    target.display_label()
-                )));
-            }
-        }
+) -> Result<Client<WebSocket>, BackendRuntimeClientError> {
+    validate_target(&target)?;
+    let api = BackendApiClient::from_stored_token(&target.base_url)?;
+    let request = protocol_ws_request(&target, &api).map_err(|error| {
+        BackendRuntimeClientError::Protocol(format!(
+            "Backend protocol request could not be constructed for {}: {error}",
+            target.display_label()
+        ))
+    })?;
+    match WebSocket::connect(request).await {
+        Ok(socket) => Ok(Client::new(socket)),
+        Err(WebSocketError::WebSocket(error)) => Err(BackendRuntimeClientError::Protocol(
+            protocol_connect_error_message(&target, &api, &error),
+        )),
     }
 }
 
@@ -453,13 +311,6 @@ fn protocol_connect_error_message(
     )
 }
 
-fn diagnostic_event(message: impl Into<String>) -> Event {
-    Event::Error {
-        code: ErrorCode::Internal,
-        message: message.into(),
-    }
-}
-
 fn validate_target(target: &BackendRuntimeTarget) -> Result<(), BackendRuntimeClientError> {
     if target.base_url.trim().is_empty() {
         return Err(BackendRuntimeClientError::InvalidTarget(

crates/client/src/client.rs

@@ -0,0 +1,137 @@
+use std::error::Error;
+use std::fmt;
+
+use protocol::stream::{decode_event, encode_method};
+use protocol::{Event, Method};
+
+use crate::transport::Socket;
+
+/// Typed Worker protocol client over an injected message transport.
+pub struct Client<T> {
+    socket: T,
+}
+
+#[derive(Debug)]
+pub enum ClientError<E> {
+    Transport(E),
+    Protocol(serde_json::Error),
+}
+
+impl<T> Client<T> {
+    pub fn new(socket: T) -> Self {
+        Self { socket }
+    }
+
+    pub fn into_inner(self) -> T {
+        self.socket
+    }
+}
+
+impl<T: Socket> Client<T> {
+    pub async fn send(&mut self, method: &Method) -> Result<(), ClientError<T::Error>> {
+        let message = encode_method(method).map_err(ClientError::Protocol)?;
+        self.socket
+            .send(message)
+            .await
+            .map_err(ClientError::Transport)
+    }
+
+    pub async fn next_event(&mut self) -> Result<Option<Event>, ClientError<T::Error>> {
+        self.socket
+            .next()
+            .await
+            .map_err(ClientError::Transport)?
+            .map(|message| decode_event(&message).map_err(ClientError::Protocol))
+            .transpose()
+    }
+
+    pub fn try_next_event(&mut self) -> Result<Option<Event>, ClientError<T::Error>> {
+        self.socket
+            .try_next()
+            .map_err(ClientError::Transport)?
+            .map(|message| decode_event(&message).map_err(ClientError::Protocol))
+            .transpose()
+    }
+}
+
+impl<E: fmt::Display> fmt::Display for ClientError<E> {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Transport(error) => write!(formatter, "Worker transport error: {error}"),
+            Self::Protocol(error) => write!(formatter, "Worker protocol error: {error}"),
+        }
+    }
+}
+
+impl<E: Error + 'static> Error for ClientError<E> {
+    fn source(&self) -> Option<&(dyn Error + 'static)> {
+        match self {
+            Self::Transport(error) => Some(error),
+            Self::Protocol(error) => Some(error),
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::collections::VecDeque;
+    use std::convert::Infallible;
+
+    use async_trait::async_trait;
+    use protocol::stream::{decode_method, encode_event};
+    use protocol::{Event, Method, WorkerStatus};
+
+    use super::Client;
+    use crate::transport::Socket;
+
+    #[derive(Default)]
+    struct TestSocket {
+        sent: Vec<String>,
+        incoming: VecDeque<String>,
+    }
+
+    #[async_trait]
+    impl Socket for TestSocket {
+        type Error = Infallible;
+
+        async fn send(&mut self, message: String) -> Result<(), Self::Error> {
+            self.sent.push(message);
+            Ok(())
+        }
+
+        async fn next(&mut self) -> Result<Option<String>, Self::Error> {
+            Ok(self.incoming.pop_front())
+        }
+
+        fn try_next(&mut self) -> Result<Option<String>, Self::Error> {
+            Ok(self.incoming.pop_front())
+        }
+    }
+
+    #[tokio::test]
+    async fn encodes_methods_and_decodes_events_above_transport() {
+        let mut socket = TestSocket::default();
+        socket.incoming.push_back(
+            encode_event(&Event::Status {
+                status: WorkerStatus::Idle,
+            })
+            .expect("encode event"),
+        );
+        let mut client = Client::new(socket);
+
+        client
+            .send(&Method::run_text("hello"))
+            .await
+            .expect("send method");
+        assert!(matches!(
+            decode_method(&client.socket.sent[0]),
+            Ok(Method::Run { .. })
+        ));
+        assert!(matches!(
+            client.next_event().await,
+            Ok(Some(Event::Status {
+                status: WorkerStatus::Idle
+            }))
+        ));
+    }
+}

crates/client/src/lib.rs

@@ -7,8 +7,9 @@ pub mod backend_api;
 mod backend_auth;
 pub mod backend_runtime;
 pub mod backend_workspace;
+mod client;
 pub mod target;
-mod worker_client;
+pub mod transport;
 mod workspace_product;
 
 pub use backend_api::{
@@ -20,23 +21,23 @@ pub use backend_auth::{
     poll_device_login, start_device_login, wait_for_device_login,
 };
 pub use backend_runtime::{
-    BackendDiagnostic, BackendDiagnosticSeverity, BackendRuntimeClient, BackendRuntimeClientError,
+    BackendDiagnostic, BackendDiagnosticSeverity, BackendRuntimeClientError,
     BackendRuntimeListResponse, BackendRuntimeListTarget, BackendRuntimeSummary,
     BackendRuntimeTarget, BackendWorkerCapabilitySummary, BackendWorkerImplementationSummary,
     BackendWorkerRestoreResponse, BackendWorkerRestoreResult, BackendWorkerSummary,
-    BackendWorkerWorkspaceSummary, BackendWorkingDirectorySummary, list_backend_stopped_workers,
-    list_backend_workers, restore_backend_worker,
+    BackendWorkerWorkspaceSummary, BackendWorkingDirectorySummary, connect_backend_runtime,
+    list_backend_stopped_workers, list_backend_workers, restore_backend_worker,
 };
 pub use backend_workspace::{
     BackendWorkspace, BackendWorkspaceCatalogTarget, BackendWorkspaceClientError,
     CreateBackendWorkspaceRepository, CreateBackendWorkspaceRequest,
     CreateBackendWorkspaceResponse, create_backend_workspace, list_backend_workspaces,
 };
+pub use client::{Client, ClientError};
 pub use target::{
-    BackendTarget, Dashboard, ResolvedTarget, StandaloneSessionListIntent,
-    StandaloneSessionResumeIntent, StandaloneTarget, Target, TargetError, TargetKind,
-    WorkerConnection, WorkerConnectionSelector, WorkerList, WorkerListRequest, WorkerSpawn,
+    BackendTarget, Dashboard, ResolvedTarget, StandaloneTarget, StandaloneWorkerListIntent,
+    StandaloneWorkerResumeIntent, Target, TargetError, TargetKind, WorkerConnection,
+    WorkerConnectionSelector, WorkerList, WorkerListRequest, WorkerSpawn,
 };
-pub use worker_client::WorkerClient;
 pub use workspace_api::{ObjectiveDetail, ObjectiveSummary};
 pub use workspace_product::BackendWorkspaceProductClient;

crates/client/src/target.rs

@@ -105,16 +105,16 @@ pub struct WorkerSpawn {
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
-pub struct StandaloneSessionListIntent {
+pub struct StandaloneWorkerListIntent {
     pub state_dir: PathBuf,
     pub cwd: PathBuf,
     pub include_all: bool,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
-pub struct StandaloneSessionResumeIntent {
+pub struct StandaloneWorkerResumeIntent {
     pub state_dir: PathBuf,
-    pub session_id: String,
+    pub worker_id: String,
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
@@ -175,22 +175,22 @@ pub trait Target: fmt::Debug + Send + Sync {
         Err(TargetError::unsupported("Worker spawn", self.kind()))
     }
 
-    fn standalone_session_list(
+    fn standalone_worker_list(
         &self,
         _include_all: bool,
-    ) -> Result<StandaloneSessionListIntent, TargetError> {
+    ) -> Result<StandaloneWorkerListIntent, TargetError> {
         Err(TargetError::unsupported(
-            "standalone session listing",
+            "standalone Worker listing",
             self.kind(),
         ))
     }
 
-    fn standalone_session_resume(
+    fn standalone_worker_resume(
         &self,
-        _session_id: String,
-    ) -> Result<StandaloneSessionResumeIntent, TargetError> {
+        _worker_id: String,
+    ) -> Result<StandaloneWorkerResumeIntent, TargetError> {
         Err(TargetError::unsupported(
-            "standalone session restore",
+            "standalone Worker restore",
             self.kind(),
         ))
     }
@@ -243,26 +243,26 @@ impl Target for StandaloneTarget {
         })
     }
 
-    fn standalone_session_list(
+    fn standalone_worker_list(
         &self,
         include_all: bool,
-    ) -> Result<StandaloneSessionListIntent, TargetError> {
+    ) -> Result<StandaloneWorkerListIntent, TargetError> {
         let cwd = std::env::current_dir()
             .map_err(|error| TargetError::invalid(self.kind(), error.to_string()))?;
-        Ok(StandaloneSessionListIntent {
+        Ok(StandaloneWorkerListIntent {
             state_dir: self.state_dir.clone(),
             cwd,
             include_all,
         })
     }
 
-    fn standalone_session_resume(
+    fn standalone_worker_resume(
         &self,
-        session_id: String,
-    ) -> Result<StandaloneSessionResumeIntent, TargetError> {
-        Ok(StandaloneSessionResumeIntent {
+        worker_id: String,
+    ) -> Result<StandaloneWorkerResumeIntent, TargetError> {
+        Ok(StandaloneWorkerResumeIntent {
             state_dir: self.state_dir.clone(),
-            session_id,
+            worker_id,
         })
     }
 }
@@ -437,17 +437,17 @@ mod tests {
     }
 
     #[test]
-    fn standalone_target_builds_explicit_session_intents() {
-        let target = StandaloneTarget::new("/tmp/yoi-client-sessions");
-        let list = target.standalone_session_list(true).unwrap();
-        assert_eq!(list.state_dir, PathBuf::from("/tmp/yoi-client-sessions"));
+    fn standalone_target_builds_explicit_worker_intents() {
+        let target = StandaloneTarget::new("/tmp/yoi-client-workers");
+        let list = target.standalone_worker_list(true).unwrap();
+        assert_eq!(list.state_dir, PathBuf::from("/tmp/yoi-client-workers"));
         assert!(list.include_all);
         assert!(list.cwd.is_absolute());
 
         let resume = target
-            .standalone_session_resume("019d1234-0000-7000-8000-000000000000".to_string())
+            .standalone_worker_resume("019d1234-0000-7000-8000-000000000000".to_string())
             .unwrap();
         assert_eq!(resume.state_dir, list.state_dir);
-        assert_eq!(resume.session_id, "019d1234-0000-7000-8000-000000000000");
+        assert_eq!(resume.worker_id, "019d1234-0000-7000-8000-000000000000");
     }
 }

crates/client/src/transport/in_process.rs

@@ -0,0 +1,115 @@
+use async_trait::async_trait;
+use thiserror::Error;
+use tokio::sync::mpsc;
+
+use super::Socket as SocketContract;
+
+const CHANNEL_CAPACITY: usize = 256;
+
+pub struct Socket {
+    outgoing: mpsc::Sender<String>,
+    incoming: mpsc::Receiver<String>,
+}
+
+/// Host-side endpoint paired with an in-process client transport.
+pub struct Peer {
+    incoming: mpsc::Receiver<String>,
+    outgoing: mpsc::Sender<String>,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+pub enum SocketError {
+    #[error("in-process Worker protocol transport closed")]
+    Closed,
+}
+
+impl Socket {
+    pub fn pair() -> (Self, Peer) {
+        let (client_tx, peer_rx) = mpsc::channel(CHANNEL_CAPACITY);
+        let (peer_tx, client_rx) = mpsc::channel(CHANNEL_CAPACITY);
+        (
+            Self {
+                outgoing: client_tx,
+                incoming: client_rx,
+            },
+            Peer {
+                incoming: peer_rx,
+                outgoing: peer_tx,
+            },
+        )
+    }
+}
+
+#[async_trait]
+impl SocketContract for Socket {
+    type Error = SocketError;
+
+    async fn send(&mut self, message: String) -> Result<(), Self::Error> {
+        self.outgoing
+            .send(message)
+            .await
+            .map_err(|_| SocketError::Closed)
+    }
+
+    async fn next(&mut self) -> Result<Option<String>, Self::Error> {
+        Ok(self.incoming.recv().await)
+    }
+
+    fn try_next(&mut self) -> Result<Option<String>, Self::Error> {
+        match self.incoming.try_recv() {
+            Ok(message) => Ok(Some(message)),
+            Err(mpsc::error::TryRecvError::Empty | mpsc::error::TryRecvError::Disconnected) => {
+                Ok(None)
+            }
+        }
+    }
+}
+
+impl Peer {
+    pub async fn next(&mut self) -> Option<String> {
+        self.incoming.recv().await
+    }
+
+    pub async fn send(&self, message: String) -> Result<(), String> {
+        self.outgoing.send(message).await.map_err(|error| error.0)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use protocol::stream::{decode_method, encode_event};
+    use protocol::{Event, Method, WorkerStatus};
+
+    use super::Socket;
+    use crate::Client;
+
+    #[tokio::test]
+    async fn pair_carries_typed_protocol_through_generic_client() {
+        let (socket, mut peer) = Socket::pair();
+        let mut client = Client::new(socket);
+
+        client
+            .send(&Method::run_text("hello"))
+            .await
+            .expect("send method");
+        assert!(matches!(
+            peer.next().await.as_deref().map(decode_method),
+            Some(Ok(Method::Run { .. }))
+        ));
+
+        peer.send(
+            encode_event(&Event::Status {
+                status: WorkerStatus::Idle,
+            })
+            .expect("encode event"),
+        )
+        .await
+        .expect("send event");
+        assert!(matches!(
+            client.next_event().await,
+            Ok(Some(Event::Status {
+                status: WorkerStatus::Idle
+            }))
+        ));
+    }
+}

crates/client/src/transport/mod.rs

@@ -0,0 +1,22 @@
+use std::error::Error;
+
+use async_trait::async_trait;
+
+pub mod in_process;
+pub mod unix_socket;
+pub mod websocket;
+
+/// Message-oriented transport for one Worker protocol connection.
+///
+/// Implementations own physical framing. `client::Client` owns the typed
+/// Method/Event protocol encoding layered on top of these UTF-8 messages.
+#[async_trait]
+pub trait Socket {
+    type Error: Error + Send + Sync + 'static;
+
+    async fn send(&mut self, message: String) -> Result<(), Self::Error>;
+
+    async fn next(&mut self) -> Result<Option<String>, Self::Error>;
+
+    fn try_next(&mut self) -> Result<Option<String>, Self::Error>;
+}

crates/client/src/transport/unix_socket.rs

@@ -0,0 +1,172 @@
+use std::io;
+use std::path::Path;
+
+use async_trait::async_trait;
+use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
+use tokio::net::UnixStream;
+use tokio::sync::mpsc;
+use tokio::task::JoinHandle;
+
+use super::Socket as SocketContract;
+
+pub struct Socket {
+    writer: tokio::io::WriteHalf<UnixStream>,
+    messages: mpsc::Receiver<io::Result<String>>,
+    reader_task: JoinHandle<()>,
+}
+
+impl Socket {
+    pub async fn connect(path: &Path) -> io::Result<Self> {
+        let stream = UnixStream::connect(path).await?;
+        let (reader, writer) = tokio::io::split(stream);
+        let (message_tx, messages) = mpsc::channel(256);
+        let reader_task = tokio::spawn(async move {
+            let mut lines = BufReader::new(reader).lines();
+            loop {
+                match lines.next_line().await {
+                    Ok(Some(message)) if message.trim().is_empty() => {}
+                    Ok(Some(message)) => {
+                        if message_tx.send(Ok(message)).await.is_err() {
+                            return;
+                        }
+                    }
+                    Ok(None) => return,
+                    Err(error) => {
+                        let _ = message_tx.send(Err(error)).await;
+                        return;
+                    }
+                }
+            }
+        });
+        Ok(Self {
+            writer,
+            messages,
+            reader_task,
+        })
+    }
+}
+
+#[async_trait]
+impl SocketContract for Socket {
+    type Error = io::Error;
+
+    async fn send(&mut self, message: String) -> Result<(), Self::Error> {
+        self.writer.write_all(message.as_bytes()).await?;
+        self.writer.write_all(b"\n").await?;
+        self.writer.flush().await
+    }
+
+    async fn next(&mut self) -> Result<Option<String>, Self::Error> {
+        match self.messages.recv().await {
+            Some(message) => message.map(Some),
+            None => Ok(None),
+        }
+    }
+
+    fn try_next(&mut self) -> Result<Option<String>, Self::Error> {
+        match self.messages.try_recv() {
+            Ok(message) => message.map(Some),
+            Err(mpsc::error::TryRecvError::Empty | mpsc::error::TryRecvError::Disconnected) => {
+                Ok(None)
+            }
+        }
+    }
+}
+
+impl Drop for Socket {
+    fn drop(&mut self) {
+        self.reader_task.abort();
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::io::ErrorKind;
+    use std::time::Duration;
+
+    use protocol::stream::{decode_method, encode_event};
+    use protocol::{Event, Method, WorkerStatus};
+    use tempfile::tempdir;
+    use tokio::io::{AsyncReadExt, AsyncWriteExt};
+    use tokio::net::UnixListener;
+
+    use super::*;
+    use crate::Client;
+
+    async fn assert_peer_closed(stream: &mut UnixStream, reason: &str) {
+        let mut buf = [0_u8; 1];
+        match tokio::time::timeout(Duration::from_secs(1), stream.read(&mut buf))
+            .await
+            .expect(reason)
+        {
+            Ok(0) => {}
+            Err(error) if error.kind() == ErrorKind::ConnectionReset => {}
+            Ok(n) => panic!("server should observe peer close, read {n} byte(s)"),
+            Err(error) => panic!("server read failed unexpectedly: {error}"),
+        }
+    }
+
+    #[tokio::test]
+    async fn client_receives_events_over_unix_socket() {
+        let socket_dir = tempdir().unwrap();
+        let socket_path = socket_dir.path().join("events.sock");
+        let listener = UnixListener::bind(&socket_path).unwrap();
+        let server = tokio::spawn(async move {
+            let (mut stream, _) = listener.accept().await.unwrap();
+            let event = encode_event(&Event::Status {
+                status: WorkerStatus::Idle,
+            })
+            .unwrap();
+            stream.write_all(event.as_bytes()).await.unwrap();
+            stream.write_all(b"\n").await.unwrap();
+        });
+
+        let mut client = Client::new(Socket::connect(&socket_path).await.unwrap());
+        let event = tokio::time::timeout(Duration::from_secs(1), client.next_event())
+            .await
+            .expect("client should receive event while alive")
+            .expect("transport should succeed");
+        assert!(matches!(
+            event,
+            Some(Event::Status {
+                status: WorkerStatus::Idle
+            })
+        ));
+        server.await.unwrap();
+    }
+
+    #[tokio::test]
+    async fn client_sends_methods_over_unix_socket() {
+        let socket_dir = tempdir().unwrap();
+        let socket_path = socket_dir.path().join("send.sock");
+        let listener = UnixListener::bind(&socket_path).unwrap();
+        let server = tokio::spawn(async move {
+            let (reader, _) = listener.accept().await.unwrap();
+            BufReader::new(reader).lines().next_line().await.unwrap()
+        });
+
+        let mut client = Client::new(Socket::connect(&socket_path).await.unwrap());
+        client
+            .send(&Method::run_text("hello"))
+            .await
+            .expect("send method");
+
+        let received = server.await.unwrap().expect("method message");
+        assert!(matches!(decode_method(&received), Ok(Method::Run { .. })));
+    }
+
+    #[tokio::test]
+    async fn dropping_socket_closes_server_connection() {
+        let socket_dir = tempdir().unwrap();
+        let socket_path = socket_dir.path().join("drop.sock");
+        let listener = UnixListener::bind(&socket_path).unwrap();
+        let server = tokio::spawn(async move {
+            let (mut stream, _) = listener.accept().await.unwrap();
+            assert_peer_closed(&mut stream, "dropped socket should close promptly").await;
+        });
+
+        let socket = Socket::connect(&socket_path).await.unwrap();
+        drop(socket);
+        server.await.unwrap();
+    }
+}

crates/client/src/transport/websocket.rs

@@ -0,0 +1,140 @@
+use async_trait::async_trait;
+use futures::{SinkExt, StreamExt};
+use thiserror::Error;
+use tokio::net::TcpStream;
+use tokio::sync::mpsc;
+use tokio::task::JoinHandle;
+use tokio_tungstenite::tungstenite::http::Request;
+use tokio_tungstenite::tungstenite::{self, Message};
+use tokio_tungstenite::{MaybeTlsStream, WebSocketStream, connect_async};
+
+use super::Socket as SocketContract;
+
+type Writer = futures::stream::SplitSink<WebSocketStream<MaybeTlsStream<TcpStream>>, Message>;
+
+pub struct Socket {
+    writer: Writer,
+    messages: mpsc::Receiver<Result<String, SocketError>>,
+    reader_task: JoinHandle<()>,
+}
+
+#[derive(Debug, Error)]
+pub enum SocketError {
+    #[error("WebSocket transport failed: {0}")]
+    WebSocket(#[from] tungstenite::Error),
+}
+
+impl Socket {
+    pub async fn connect(request: Request<()>) -> Result<Self, SocketError> {
+        let (stream, _) = connect_async(request).await?;
+        let (writer, mut reader) = stream.split();
+        let (message_tx, messages) = mpsc::channel(256);
+        let reader_task = tokio::spawn(async move {
+            loop {
+                match reader.next().await {
+                    Some(Ok(Message::Text(message))) => {
+                        if message_tx.send(Ok(message.to_string())).await.is_err() {
+                            return;
+                        }
+                    }
+                    Some(Ok(Message::Close(_))) | None => return,
+                    Some(Ok(
+                        Message::Binary(_)
+                        | Message::Ping(_)
+                        | Message::Pong(_)
+                        | Message::Frame(_),
+                    )) => {}
+                    Some(Err(error)) => {
+                        let _ = message_tx.send(Err(SocketError::WebSocket(error))).await;
+                        return;
+                    }
+                }
+            }
+        });
+        Ok(Self {
+            writer,
+            messages,
+            reader_task,
+        })
+    }
+}
+
+#[async_trait]
+impl SocketContract for Socket {
+    type Error = SocketError;
+
+    async fn send(&mut self, message: String) -> Result<(), Self::Error> {
+        self.writer.send(Message::Text(message.into())).await?;
+        Ok(())
+    }
+
+    async fn next(&mut self) -> Result<Option<String>, Self::Error> {
+        match self.messages.recv().await {
+            Some(message) => message.map(Some),
+            None => Ok(None),
+        }
+    }
+
+    fn try_next(&mut self) -> Result<Option<String>, Self::Error> {
+        match self.messages.try_recv() {
+            Ok(message) => message.map(Some),
+            Err(mpsc::error::TryRecvError::Empty | mpsc::error::TryRecvError::Disconnected) => {
+                Ok(None)
+            }
+        }
+    }
+}
+
+impl Drop for Socket {
+    fn drop(&mut self) {
+        self.reader_task.abort();
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use futures::{SinkExt, StreamExt};
+    use protocol::stream::{decode_method, encode_event};
+    use protocol::{Event, Method, WorkerStatus};
+    use tokio::net::TcpListener;
+    use tokio_tungstenite::accept_async;
+    use tokio_tungstenite::tungstenite::client::IntoClientRequest;
+
+    use super::*;
+    use crate::Client;
+
+    #[tokio::test]
+    async fn carries_typed_protocol_through_generic_client() {
+        let listener = TcpListener::bind("127.0.0.1:0").await.unwrap();
+        let address = listener.local_addr().unwrap();
+        let server = tokio::spawn(async move {
+            let (stream, _) = listener.accept().await.unwrap();
+            let mut socket = accept_async(stream).await.unwrap();
+            let message = socket.next().await.unwrap().unwrap();
+            assert!(matches!(
+                message,
+                Message::Text(ref text)
+                    if matches!(decode_method(text), Ok(Method::Run { .. }))
+            ));
+            let event = encode_event(&Event::Status {
+                status: WorkerStatus::Idle,
+            })
+            .unwrap();
+            socket.send(Message::Text(event.into())).await.unwrap();
+        });
+
+        let request = format!("ws://{address}").into_client_request().unwrap();
+        let mut client = Client::new(Socket::connect(request).await.unwrap());
+        client
+            .send(&Method::run_text("hello"))
+            .await
+            .expect("send method");
+        assert!(matches!(
+            client.next_event().await,
+            Ok(Some(Event::Status {
+                status: WorkerStatus::Idle
+            }))
+        ));
+        server.await.unwrap();
+    }
+}

crates/client/src/worker_client.rs

@@ -1,186 +0,0 @@
-use std::io;
-use std::path::Path;
-
-use protocol::stream::{JsonLineReader, JsonLineWriter};
-use protocol::{Event, Method};
-use tokio::net::UnixStream;
-use tokio::sync::mpsc;
-use tokio::task::JoinHandle;
-
-pub struct WorkerClient {
-    writer: JsonLineWriter<tokio::io::WriteHalf<UnixStream>>,
-    event_rx: mpsc::Receiver<Event>,
-    reader_task: JoinHandle<()>,
-}
-
-impl WorkerClient {
-    pub async fn connect(path: &Path) -> Result<Self, io::Error> {
-        let stream = UnixStream::connect(path).await?;
-        let (reader, writer) = tokio::io::split(stream);
-        let writer = JsonLineWriter::new(writer);
-
-        let (event_tx, event_rx) = mpsc::channel::<Event>(256);
-
-        let reader_task = tokio::spawn(async move {
-            let mut reader = JsonLineReader::new(reader);
-            while let Ok(Some(event)) = reader.next::<Event>().await {
-                if event_tx.send(event).await.is_err() {
-                    break;
-                }
-            }
-        });
-
-        Ok(Self {
-            writer,
-            event_rx,
-            reader_task,
-        })
-    }
-
-    pub async fn send(&mut self, method: &Method) -> Result<(), io::Error> {
-        self.writer.write(method).await
-    }
-
-    pub fn try_next_event(&mut self) -> Option<Event> {
-        self.event_rx.try_recv().ok()
-    }
-
-    pub async fn next_event(&mut self) -> Option<Event> {
-        self.event_rx.recv().await
-    }
-}
-
-impl Drop for WorkerClient {
-    fn drop(&mut self) {
-        self.reader_task.abort();
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use std::io::ErrorKind;
-    use std::time::Duration;
-
-    use protocol::{Segment, WorkerStatus};
-    use tempfile::tempdir;
-    use tokio::io::{AsyncReadExt, AsyncWriteExt};
-    use tokio::net::UnixListener;
-
-    use super::*;
-
-    async fn assert_peer_closed(stream: &mut UnixStream, reason: &str) {
-        let mut buf = [0_u8; 1];
-        match tokio::time::timeout(Duration::from_secs(1), stream.read(&mut buf))
-            .await
-            .expect(reason)
-        {
-            Ok(0) => {}
-            Err(error) if error.kind() == ErrorKind::ConnectionReset => {}
-            Ok(n) => panic!("server should observe peer close, read {n} byte(s)"),
-            Err(error) => panic!("server read failed unexpectedly: {error}"),
-        }
-    }
-
-    #[tokio::test]
-    async fn receives_events_while_client_is_alive() {
-        let socket_dir = tempdir().unwrap();
-        let socket_path = socket_dir.path().join("events.sock");
-        let listener = UnixListener::bind(&socket_path).unwrap();
-        let server = tokio::spawn(async move {
-            let (stream, _) = listener.accept().await.unwrap();
-            let mut writer = JsonLineWriter::new(stream);
-            writer
-                .write(&Event::Status {
-                    status: WorkerStatus::Idle,
-                })
-                .await
-                .unwrap();
-        });
-
-        let mut client = WorkerClient::connect(&socket_path).await.unwrap();
-
-        let event = tokio::time::timeout(Duration::from_secs(1), client.next_event())
-            .await
-            .expect("client should receive event while alive");
-        assert!(matches!(
-            event,
-            Some(Event::Status {
-                status: WorkerStatus::Idle
-            })
-        ));
-        server.await.unwrap();
-    }
-
-    #[tokio::test]
-    async fn send_writes_methods_while_client_is_alive() {
-        let socket_dir = tempdir().unwrap();
-        let socket_path = socket_dir.path().join("send.sock");
-        let listener = UnixListener::bind(&socket_path).unwrap();
-        let server = tokio::spawn(async move {
-            let (stream, _) = listener.accept().await.unwrap();
-            let mut reader = JsonLineReader::new(stream);
-            reader.next::<Method>().await.unwrap()
-        });
-
-        let mut client = WorkerClient::connect(&socket_path).await.unwrap();
-        let method = Method::Run {
-            input: vec![Segment::text("hello")],
-        };
-        client.send(&method).await.unwrap();
-
-        let received = tokio::time::timeout(Duration::from_secs(1), server)
-            .await
-            .expect("server should receive method while client is alive")
-            .unwrap();
-        match received {
-            Some(Method::Run { input }) => assert_eq!(input, vec![Segment::text("hello")]),
-            other => panic!("expected Run method, got {other:?}"),
-        }
-    }
-
-    #[tokio::test]
-    async fn dropping_repeated_clients_closes_server_connections() {
-        let socket_dir = tempdir().unwrap();
-        let socket_path = socket_dir.path().join("drop.sock");
-        let listener = UnixListener::bind(&socket_path).unwrap();
-        let server = tokio::spawn(async move {
-            for _ in 0..16 {
-                let (mut stream, _) = listener.accept().await.unwrap();
-                assert_peer_closed(
-                    &mut stream,
-                    "dropped client should close its socket promptly",
-                )
-                .await;
-            }
-        });
-
-        for _ in 0..16 {
-            let client = WorkerClient::connect(&socket_path).await.unwrap();
-            drop(client);
-        }
-
-        server.await.unwrap();
-    }
-
-    #[tokio::test]
-    async fn dropping_client_aborts_blocked_reader_task() {
-        let socket_dir = tempdir().unwrap();
-        let socket_path = socket_dir.path().join("blocked-reader.sock");
-        let listener = UnixListener::bind(&socket_path).unwrap();
-        let server = tokio::spawn(async move {
-            let (mut stream, _) = listener.accept().await.unwrap();
-            stream.write_all(b"{\"event\"").await.unwrap();
-            assert_peer_closed(
-                &mut stream,
-                "aborting the blocked client reader should close the socket",
-            )
-            .await;
-        });
-
-        let client = WorkerClient::connect(&socket_path).await.unwrap();
-        tokio::task::yield_now().await;
-        drop(client);
-
-        server.await.unwrap();
-    }
-}

crates/fs-operation/src/lib.rs

@@ -177,6 +177,8 @@ mod tests {
     fn logical_paths_reject_absolute_parent_and_backslash_forms() {
         assert!(FsPath::new("src/lib.rs").is_ok());
         assert!(FsPath::new("/tmp/file").is_err());
+        assert!(FsPath::new_scoped("/tmp/file").is_ok());
+        assert!(FsPath::new_scoped("/tmp/../secret").is_err());
         assert!(FsPath::new("../file").is_err());
         assert!(FsPath::new("src\\lib.rs").is_err());
     }

crates/fs-operation/src/operation.rs

@@ -5,7 +5,8 @@ use serde::{Deserialize, Serialize};
 
 use crate::FsError;
 
-/// Logical path relative to the bound Workdir root.
+/// Scope-checked filesystem path. Relative paths resolve below the bound
+/// Workdir root; absolute paths require an explicit matching scope rule.
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize)]
 #[serde(transparent)]
 pub struct FsPath(String);
@@ -16,11 +17,30 @@ impl<'de> Deserialize<'de> for FsPath {
         D: serde::Deserializer<'de>,
     {
         let value = String::deserialize(deserializer)?;
-        Self::new(&value).map_err(serde::de::Error::custom)
+        Self::new_scoped(&value).map_err(serde::de::Error::custom)
     }
 }
 
 impl FsPath {
+    /// Construct a path for a scope-checked operation that may target an
+    /// explicitly granted absolute path outside the provider root.
+    pub fn new_scoped(value: impl Into<String>) -> Result<Self, FsError> {
+        let value = value.into();
+        if !Path::new(&value).is_absolute() {
+            return Self::new(value);
+        }
+        if value.contains('\\') {
+            return Err(FsError::InvalidPath(value));
+        }
+        if Path::new(&value)
+            .components()
+            .any(|component| component == Component::ParentDir)
+        {
+            return Err(FsError::InvalidPath(value));
+        }
+        Ok(Self(value))
+    }
+
     pub fn root() -> Self {
         Self(String::new())
     }

crates/protocol/Cargo.toml

@@ -14,6 +14,7 @@ json-schema = ["dep:schemars"]
 schemars = { workspace = true, optional = true }
 serde = { workspace = true, features = ["derive"] }
 serde_json = { workspace = true }
+sha2.workspace = true
 tokio = { workspace = true, features = ["io-util"], optional = true }
 ts-rs = { version = "12.0.1", optional = true }
-uuid = { workspace = true, features = ["serde"] }
+uuid = { workspace = true, features = ["serde", "v7"] }

crates/protocol/src/identity.rs

@@ -0,0 +1,132 @@
+use std::{fmt, str::FromStr};
+
+use serde::{Deserialize, Deserializer, Serialize, Serializer, de};
+use sha2::{Digest, Sha256};
+use uuid::{Uuid, Version};
+
+/// Stable Worker identity independent of its current Runtime placement or
+/// conversation Session.
+///
+/// Workspace authority allocates this ID for managed Workers. A standalone
+/// Worker store allocates it locally when no Workspace authority is present.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
+pub struct WorkerId(Uuid);
+
+impl WorkerId {
+    pub fn now_v7() -> Self {
+        Self(Uuid::now_v7())
+    }
+
+    /// Converts a legacy Runtime-local numeric id into a syntactically valid
+    /// migration-only UUIDv7 value. New Worker allocation must use `now_v7`.
+    pub fn from_legacy_u64(value: u64) -> Self {
+        let mut bytes = [0_u8; 16];
+        bytes[8..].copy_from_slice(&value.to_be_bytes());
+        bytes[6] = 0x70;
+        bytes[8] = (bytes[8] & 0x3f) | 0x80;
+        Self(Uuid::from_bytes(bytes))
+    }
+
+    pub fn from_legacy_binding(workspace_id: &str, runtime_id: &str, value: u64) -> Self {
+        let mut hasher = Sha256::new();
+        hasher.update(b"yoi.workspace-worker-id.v1\0");
+        hasher.update(workspace_id.as_bytes());
+        hasher.update([0]);
+        hasher.update(runtime_id.as_bytes());
+        hasher.update([0]);
+        hasher.update(value.to_be_bytes());
+        let digest = hasher.finalize();
+        let mut bytes = [0_u8; 16];
+        bytes.copy_from_slice(&digest[..16]);
+        // Migrated ids sort before normally allocated UUIDv7 values while retaining
+        // deterministic collision-resistant payload bits.
+        bytes[..6].fill(0);
+        bytes[6] = (bytes[6] & 0x0f) | 0x70;
+        bytes[8] = (bytes[8] & 0x3f) | 0x80;
+        Self(Uuid::from_bytes(bytes))
+    }
+
+    pub fn parse(value: &str) -> Option<Self> {
+        let value = Uuid::parse_str(value).ok()?;
+        (value.get_version() == Some(Version::SortRand)).then_some(Self(value))
+    }
+
+    pub const fn as_uuid(self) -> Uuid {
+        self.0
+    }
+
+    #[must_use]
+    pub fn short(self) -> String {
+        let simple = self.0.simple().to_string();
+        simple[simple.len() - 12..].to_string()
+    }
+}
+
+impl fmt::Display for WorkerId {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.0.fmt(formatter)
+    }
+}
+
+impl FromStr for WorkerId {
+    type Err = WorkerIdParseError;
+
+    fn from_str(value: &str) -> Result<Self, Self::Err> {
+        Self::parse(value).ok_or(WorkerIdParseError)
+    }
+}
+
+impl Serialize for WorkerId {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_str(&self.to_string())
+    }
+}
+
+impl<'de> Deserialize<'de> for WorkerId {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let value = String::deserialize(deserializer)?;
+        Self::parse(&value).ok_or_else(|| de::Error::custom("Worker id must be a UUIDv7"))
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct WorkerIdParseError;
+
+impl fmt::Display for WorkerIdParseError {
+    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
+        formatter.write_str("Worker id must be a UUIDv7")
+    }
+}
+
+impl std::error::Error for WorkerIdParseError {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn worker_id_accepts_only_uuid_v7() {
+        let worker_id = WorkerId::now_v7();
+        assert_eq!(WorkerId::parse(&worker_id.to_string()), Some(worker_id));
+        assert!(WorkerId::parse("30").is_none());
+        assert!(WorkerId::parse(&Uuid::nil().to_string()).is_none());
+    }
+
+    #[test]
+    fn legacy_worker_id_mapping_is_stable() {
+        assert_eq!(
+            WorkerId::from_legacy_binding("workspace", "runtime", 42),
+            WorkerId::from_legacy_binding("workspace", "runtime", 42)
+        );
+        assert_ne!(
+            WorkerId::from_legacy_binding("workspace", "runtime", 42),
+            WorkerId::from_legacy_binding("workspace", "runtime", 43)
+        );
+    }
+}

crates/protocol/src/lib.rs

@@ -1,3 +1,4 @@
+pub mod identity;
 #[cfg(feature = "stream")]
 pub mod stream;
 pub mod subscription;
@@ -8,6 +9,8 @@ use std::path::PathBuf;
 
 use serde::{Deserialize, Serialize};
 
+pub use identity::{WorkerId, WorkerIdParseError};
+
 fn default_true() -> bool {
     true
 }

crates/standalone/Cargo.toml

@@ -7,6 +7,7 @@ license.workspace = true
 
 [dependencies]
 agen.workspace = true
+client.workspace = true
 fs4.workspace = true
 manifest.workspace = true
 protocol.workspace = true

crates/standalone/src/host.rs

@@ -2,26 +2,34 @@ use std::path::PathBuf;
 use std::time::Duration;
 
 use agen::llm_client::client::LlmClient;
-use protocol::{Event, Method};
+use client::Client;
+use client::transport::in_process::{Peer as InProcessPeer, Socket as InProcessSocket};
+use protocol::stream::{decode_method, encode_event};
+use protocol::{Event, Method, WorkerId};
 use session_store::{
     CombinedStore, FsStore, FsWorkerStore, WorkerActiveSegmentRef, WorkerMetadataStore,
 };
 use thiserror::Error;
-use tokio::sync::broadcast;
-use worker::bootstrap::{WorkerBootstrap, WorkerBootstrapError, WorkerBootstrapLayout};
+use worker::bootstrap::{
+    WorkerBootstrap, WorkerBootstrapError, WorkerBootstrapLayout, bash_output_dir_for_worker_id,
+};
 use worker::controller::WorkerControllerTransport;
+use worker::ipc::protocol_session::{
+    WorkerProtocolSessionStreams, dispatch_worker_protocol_method, live_log_entry_event,
+    subscribe_worker_protocol_session,
+};
 use worker::{BootstrappedWorker, WorkerError, WorkerFilesystemAuthority, WorkerWorkspaceContext};
 
 use crate::launch::ResolvedStandaloneLaunch;
 use crate::store::{
-    StaleLeasePolicy, StandaloneSessionId, StandaloneSessionLease, StandaloneSessionRecord,
-    StandaloneSessionStore, StandaloneShutdownReason, StandaloneStoreError,
+    StaleLeasePolicy, StandaloneShutdownReason, StandaloneStoreError, StandaloneWorkerLease,
+    StandaloneWorkerRecord, StandaloneWorkerStore,
 };
 
 const DEFAULT_SHUTDOWN_TIMEOUT: Duration = Duration::from_secs(10);
 type StandaloneBackingStore = CombinedStore<FsStore, FsWorkerStore>;
 
-/// One client-owned top-level Worker and its standalone session authority.
+/// One client-owned top-level Worker and its standalone Worker authority.
 ///
 /// The host deliberately exposes the existing typed Worker protocol rather than owning an
 /// HTTP/WebSocket server or creating Runtime/Workspace/Ticket/Workdir domain records.
@@ -29,21 +37,21 @@ pub struct StandaloneHost {
     handle: worker::WorkerHandle,
     shutdown: Option<worker::controller::ShutdownReceiver>,
     shutdown_timeout: Duration,
-    store: StandaloneSessionStore,
+    store: StandaloneWorkerStore,
     worker_store: FsWorkerStore,
-    record: StandaloneSessionRecord,
-    lease: Option<StandaloneSessionLease>,
+    record: StandaloneWorkerRecord,
+    lease: Option<StandaloneWorkerLease>,
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
 pub enum StandaloneStartupError {
     #[error("the standalone state store could not be opened or validated")]
     StateStore,
-    #[error("the standalone session is already active")]
-    SessionActive,
-    #[error("the standalone session lease cannot be observed safely; recovery is rejected")]
+    #[error("the standalone Worker is already active")]
+    WorkerActive,
+    #[error("the standalone Worker lease cannot be observed safely; recovery is rejected")]
     LeaseLivenessUnknown,
-    #[error("the standalone session working directory is unavailable or changed")]
+    #[error("the standalone Worker working directory is unavailable or changed")]
     WorkingDirectoryUnavailable,
     #[error("the resolved Worker configuration or persisted history is invalid")]
     WorkerConfiguration,
@@ -55,19 +63,13 @@ pub enum StandaloneStartupError {
     Controller,
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
-pub enum StandaloneRequestError {
-    #[error("the standalone Worker is no longer accepting requests")]
-    WorkerUnavailable,
-}
-
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
 pub enum StandaloneShutdownError {
     #[error("the standalone Worker did not stop before the shutdown deadline")]
     DeadlineExceeded,
     #[error("the standalone Worker shutdown confirmation was lost")]
     ConfirmationLost,
-    #[error("the standalone session final state could not be committed")]
+    #[error("the standalone Worker final state could not be committed")]
     StateStore,
 }
 
@@ -87,22 +89,24 @@ impl StandaloneHost {
     }
 
     async fn start_with_optional_model_client(
-        mut launch: ResolvedStandaloneLaunch,
+        launch: ResolvedStandaloneLaunch,
         model_client: Option<Box<dyn LlmClient>>,
     ) -> Result<Self, StandaloneStartupError> {
-        let store = StandaloneSessionStore::open(&launch.state_dir)
-            .map_err(classify_store_startup_error)?;
+        let store =
+            StandaloneWorkerStore::open(&launch.state_dir).map_err(classify_store_startup_error)?;
         let allocation = store
             .allocate(&launch.cwd, StaleLeasePolicy::Reject)
             .map_err(classify_store_startup_error)?;
-        let id = allocation.id();
+        let worker_id = allocation.worker_id();
 
-        // The standalone session ID is the local identity. A unique internal Worker name avoids
-        // process-global allocation collisions without creating a Runtime/Workspace Worker ID.
-        launch.profile.manifest.worker.name = format!("standalone-{id}");
+        // WorkerId is the stable identity. The current Worker store remains
+        // name-keyed, so keep its derived storage key separate from the
+        // user-facing profile name.
         let manifest = launch.profile.manifest.clone();
-        let worker_name = manifest.worker.name.clone();
-        let (backing_store, worker_store) = match backing_store(&store, id) {
+        let storage_key = format!("standalone-{worker_id}");
+        let mut bootstrap_manifest = manifest.clone();
+        bootstrap_manifest.worker.name = storage_key.clone();
+        let (backing_store, worker_store) = match backing_store(&store, worker_id) {
             Ok(stores) => stores,
             Err(error) => {
                 let _ = store.abandon_allocation(allocation);
@@ -112,15 +116,19 @@ impl StandaloneHost {
         let filesystem_authority =
             WorkerFilesystemAuthority::local(launch.cwd.clone(), launch.cwd.clone());
         let workspace_context = WorkerWorkspaceContext::local_filesystem(None);
-        let runtime_base = store.runtime_dir(id);
+        let runtime_base = store.runtime_dir(worker_id);
+        let bash_output_dir = bash_output_dir_for_worker_id(worker_id);
 
         let mut bootstrap = WorkerBootstrap::new(
-            manifest.clone(),
+            bootstrap_manifest,
             backing_store,
             launch.prompt_catalog,
             workspace_context,
             filesystem_authority,
-            WorkerBootstrapLayout::Direct { runtime_base },
+            WorkerBootstrapLayout::Direct {
+                runtime_base,
+                bash_output_dir,
+            },
             WorkerControllerTransport::InProcess,
         );
         if let Some(model_client) = model_client {
@@ -133,7 +141,7 @@ impl StandaloneHost {
                 return Err(classify_startup_error(error));
             }
         };
-        let active = match active_pointer(&worker_store, &worker_name) {
+        let active = match active_pointer(&worker_store, &storage_key) {
             Ok(active) => active,
             Err(error) => {
                 stop_started_worker(started).await;
@@ -141,16 +149,20 @@ impl StandaloneHost {
                 return Err(error);
             }
         };
-        let record =
-            match store.commit_created(&allocation, manifest, active.session_id, active.segment_id)
-            {
-                Ok(record) => record,
-                Err(_) => {
-                    stop_started_worker(started).await;
-                    let _ = store.abandon_allocation(allocation);
-                    return Err(StandaloneStartupError::StateStore);
-                }
-            };
+        let record = match store.commit_created(
+            &allocation,
+            manifest,
+            storage_key,
+            active.session_id,
+            active.segment_id,
+        ) {
+            Ok(record) => record,
+            Err(_) => {
+                stop_started_worker(started).await;
+                let _ = store.abandon_allocation(allocation);
+                return Err(StandaloneStartupError::StateStore);
+            }
+        };
         Ok(Self::from_started(
             started,
             store,
@@ -162,50 +174,47 @@ impl StandaloneHost {
 
     pub async fn restore(
         state_dir: PathBuf,
-        session_id: StandaloneSessionId,
+        worker_id: WorkerId,
     ) -> Result<Self, StandaloneStartupError> {
-        Self::restore_with_optional_model_client(state_dir, session_id, None).await
+        Self::restore_with_optional_model_client(state_dir, worker_id, None).await
     }
 
     pub async fn restore_with_model_client<C>(
         state_dir: PathBuf,
-        session_id: StandaloneSessionId,
+        worker_id: WorkerId,
         model_client: C,
     ) -> Result<Self, StandaloneStartupError>
     where
         C: LlmClient + 'static,
     {
-        Self::restore_with_optional_model_client(
-            state_dir,
-            session_id,
-            Some(Box::new(model_client)),
-        )
-        .await
+        Self::restore_with_optional_model_client(state_dir, worker_id, Some(Box::new(model_client)))
+            .await
     }
 
     async fn restore_with_optional_model_client(
         state_dir: PathBuf,
-        session_id: StandaloneSessionId,
+        worker_id: WorkerId,
         model_client: Option<Box<dyn LlmClient>>,
     ) -> Result<Self, StandaloneStartupError> {
-        let store =
-            StandaloneSessionStore::open(state_dir).map_err(classify_store_startup_error)?;
+        let store = StandaloneWorkerStore::open(state_dir).map_err(classify_store_startup_error)?;
         let record = store
-            .load(session_id)
+            .load(worker_id)
             .map_err(classify_store_startup_error)?;
         record.cwd.verify().map_err(classify_store_startup_error)?;
         let lease = store
-            .acquire_lease(session_id, StaleLeasePolicy::Recover)
+            .acquire_lease(worker_id, StaleLeasePolicy::Recover)
             .map_err(classify_store_startup_error)?;
-        let (backing_store, worker_store) = backing_store(&store, session_id)?;
-        let worker_name = record.worker_name.clone();
-        let manifest = record.manifest.clone();
+        let (backing_store, worker_store) = backing_store(&store, worker_id)?;
+        let storage_key = record.storage_key.clone();
+        let mut manifest = record.manifest.clone();
+        manifest.worker.name = storage_key.clone();
         let filesystem_authority = WorkerFilesystemAuthority::local(
             record.cwd.canonical_path.clone(),
             record.cwd.canonical_path.clone(),
         );
         let workspace_context = WorkerWorkspaceContext::local_filesystem(None);
-        let runtime_base = store.runtime_dir(session_id);
+        let runtime_base = store.runtime_dir(worker_id);
+        let bash_output_dir = bash_output_dir_for_worker_id(worker_id);
 
         let mut bootstrap = WorkerBootstrap::new(
             manifest,
@@ -213,18 +222,21 @@ impl StandaloneHost {
             worker::PromptCatalogSource::builtins_only(),
             workspace_context,
             filesystem_authority,
-            WorkerBootstrapLayout::Direct { runtime_base },
+            WorkerBootstrapLayout::Direct {
+                runtime_base,
+                bash_output_dir,
+            },
             WorkerControllerTransport::InProcess,
         );
         if let Some(model_client) = model_client {
             bootstrap = bootstrap.with_model_client(model_client);
         }
         let prepared = bootstrap
-            .prepare_restored(&worker_name)
+            .prepare_restored(&storage_key)
             .await
             .map_err(classify_startup_error)?;
         let started = prepared.start().await.map_err(classify_startup_error)?;
-        let active = match active_pointer(&worker_store, &worker_name) {
+        let active = match active_pointer(&worker_store, &storage_key) {
             Ok(active) => active,
             Err(error) => {
                 stop_started_worker(started).await;
@@ -251,10 +263,10 @@ impl StandaloneHost {
 
     fn from_started(
         started: BootstrappedWorker,
-        store: StandaloneSessionStore,
+        store: StandaloneWorkerStore,
         worker_store: FsWorkerStore,
-        record: StandaloneSessionRecord,
-        lease: StandaloneSessionLease,
+        record: StandaloneWorkerRecord,
+        lease: StandaloneWorkerLease,
     ) -> Self {
         Self {
             handle: started.handle,
@@ -268,28 +280,24 @@ impl StandaloneHost {
     }
 
     #[must_use]
-    pub fn session_id(&self) -> StandaloneSessionId {
-        self.record.session_id
+    pub fn worker_id(&self) -> WorkerId {
+        self.record.worker_id
     }
 
     #[must_use]
-    pub fn record(&self) -> &StandaloneSessionRecord {
+    pub fn record(&self) -> &StandaloneWorkerRecord {
         &self.record
     }
 
-    pub async fn send(&self, method: Method) -> Result<(), StandaloneRequestError> {
-        self.handle
-            .send(method)
-            .await
-            .map_err(|_| StandaloneRequestError::WorkerUnavailable)
-    }
-
-    pub fn subscribe(&self) -> broadcast::Receiver<Event> {
-        self.handle.subscribe()
-    }
-
-    pub fn snapshot(&self) -> Event {
-        self.handle.snapshot_event()
+    /// Open one complete client-side Worker protocol session.
+    ///
+    /// Working events, committed session entries, alert snapshots, and the
+    /// initial history snapshot are merged behind the client boundary.
+    pub fn connect(&self) -> Client<InProcessSocket> {
+        let streams = subscribe_worker_protocol_session(&self.handle);
+        let (socket, peer) = InProcessSocket::pair();
+        tokio::spawn(run_protocol_session(self.handle.clone(), streams, peer));
+        Client::new(socket)
     }
 
     pub fn with_shutdown_timeout(mut self, shutdown_timeout: Duration) -> Self {
@@ -314,7 +322,7 @@ impl StandaloneHost {
                 return Err(StandaloneShutdownError::DeadlineExceeded);
             }
         }
-        let active = match active_pointer(&self.worker_store, &self.record.worker_name) {
+        let active = match active_pointer(&self.worker_store, &self.record.storage_key) {
             Ok(active) => active,
             Err(_) => {
                 self.retain_lease();
@@ -349,13 +357,118 @@ impl StandaloneHost {
     }
 }
 
+async fn run_protocol_session(
+    handle: worker::WorkerHandle,
+    streams: WorkerProtocolSessionStreams,
+    mut peer: InProcessPeer,
+) {
+    let WorkerProtocolSessionStreams {
+        snapshot_event,
+        mut log_entries,
+        alert_snapshot,
+        mut events,
+    } = streams;
+
+    if !send_protocol_snapshot(&peer, alert_snapshot, snapshot_event).await {
+        return;
+    }
+
+    loop {
+        tokio::select! {
+            message = peer.next() => {
+                let Some(message) = message else {
+                    return;
+                };
+                let Ok(method) = decode_method(&message) else {
+                    return;
+                };
+                if let Some(event) = dispatch_worker_protocol_method(&handle, method).await
+                    && !send_protocol_event(&peer, event).await
+                {
+                    return;
+                }
+            }
+            event = events.recv() => {
+                match event {
+                    Ok(event) => {
+                        if !send_protocol_event(&peer, event).await {
+                            return;
+                        }
+                    }
+                    Err(tokio::sync::broadcast::error::RecvError::Lagged(_)) => {
+                        let replacement = subscribe_worker_protocol_session(&handle);
+                        let WorkerProtocolSessionStreams {
+                            snapshot_event,
+                            log_entries: replacement_log_entries,
+                            alert_snapshot,
+                            events: replacement_events,
+                        } = replacement;
+                        log_entries = replacement_log_entries;
+                        events = replacement_events;
+                        if !send_protocol_snapshot(&peer, alert_snapshot, snapshot_event).await {
+                            return;
+                        }
+                    }
+                    Err(tokio::sync::broadcast::error::RecvError::Closed) => return,
+                }
+            }
+            entry = log_entries.recv() => {
+                match entry {
+                    Ok(entry) => {
+                        if let Some(event) = live_log_entry_event(entry)
+                            && !send_protocol_event(&peer, event).await
+                        {
+                            return;
+                        }
+                    }
+                    Err(tokio::sync::broadcast::error::RecvError::Lagged(_)) => {
+                        let replacement = subscribe_worker_protocol_session(&handle);
+                        let WorkerProtocolSessionStreams {
+                            snapshot_event,
+                            log_entries: replacement_log_entries,
+                            alert_snapshot,
+                            events: replacement_events,
+                        } = replacement;
+                        log_entries = replacement_log_entries;
+                        events = replacement_events;
+                        if !send_protocol_snapshot(&peer, alert_snapshot, snapshot_event).await {
+                            return;
+                        }
+                    }
+                    Err(tokio::sync::broadcast::error::RecvError::Closed) => return,
+                }
+            }
+        }
+    }
+}
+
+async fn send_protocol_snapshot(
+    peer: &InProcessPeer,
+    alert_snapshot: Vec<protocol::Alert>,
+    snapshot_event: Event,
+) -> bool {
+    for alert in alert_snapshot {
+        if !send_protocol_event(peer, Event::Alert(alert)).await {
+            return false;
+        }
+    }
+    send_protocol_event(peer, snapshot_event).await
+}
+
+async fn send_protocol_event(peer: &InProcessPeer, event: Event) -> bool {
+    let Ok(message) = encode_event(&event) else {
+        return false;
+    };
+    peer.send(message).await.is_ok()
+}
+
 fn backing_store(
-    store: &StandaloneSessionStore,
-    id: StandaloneSessionId,
+    store: &StandaloneWorkerStore,
+    worker_id: WorkerId,
 ) -> Result<(StandaloneBackingStore, FsWorkerStore), StandaloneStartupError> {
-    let session_store =
-        FsStore::new(store.session_log_dir(id)).map_err(|_| StandaloneStartupError::StateStore)?;
-    let worker_store = FsWorkerStore::new(store.worker_metadata_dir(id))
+    let session_store = FsStore::new(store.sessions_dir(worker_id))
+        .map_err(|_| StandaloneStartupError::StateStore)?;
+    let worker_store = FsWorkerStore::new(store.worker_metadata_dir(worker_id))
         .map_err(|_| StandaloneStartupError::StateStore)?;
     Ok((
         CombinedStore::new(session_store, worker_store.clone()),
@@ -365,10 +478,10 @@ fn backing_store(
 
 fn active_pointer(
     worker_store: &FsWorkerStore,
-    worker_name: &str,
+    storage_key: &str,
 ) -> Result<WorkerActiveSegmentRef, StandaloneStartupError> {
     worker_store
-        .read_by_name(worker_name)
+        .read_by_name(storage_key)
         .map_err(|_| StandaloneStartupError::StateStore)?
         .and_then(|metadata| metadata.active)
         .ok_or(StandaloneStartupError::StateStore)
@@ -381,7 +494,7 @@ async fn stop_started_worker(started: BootstrappedWorker) {
 
 fn classify_store_startup_error(error: StandaloneStoreError) -> StandaloneStartupError {
     match error {
-        StandaloneStoreError::SessionLeased(_) => StandaloneStartupError::SessionActive,
+        StandaloneStoreError::WorkerLeased(_) => StandaloneStartupError::WorkerActive,
         StandaloneStoreError::LeaseLivenessUnknown(_) => {
             StandaloneStartupError::LeaseLivenessUnknown
         }

crates/standalone/src/lib.rs

@@ -8,12 +8,10 @@ pub mod host;
 pub mod launch;
 pub mod store;
 
-pub use host::{
-    StandaloneHost, StandaloneRequestError, StandaloneShutdownError, StandaloneStartupError,
-};
+pub use host::{StandaloneHost, StandaloneShutdownError, StandaloneStartupError};
 pub use launch::{ResolvedStandaloneLaunch, StandaloneLaunchConfig, StandaloneLaunchError};
+pub use protocol::WorkerId;
 pub use store::{
-    StaleLeasePolicy, StandaloneCwdIdentity, StandaloneListScope, StandaloneSessionId,
-    StandaloneSessionRecord, StandaloneSessionStatus, StandaloneSessionStore,
-    StandaloneShutdownReason, StandaloneStoreError,
+    StaleLeasePolicy, StandaloneCwdIdentity, StandaloneListScope, StandaloneShutdownReason,
+    StandaloneStoreError, StandaloneWorkerRecord, StandaloneWorkerStatus, StandaloneWorkerStore,
 };

crates/standalone/src/store.rs

@@ -1,12 +1,11 @@
-use std::fmt;
 use std::fs::{self, File, OpenOptions};
 use std::io::{self, Write};
 use std::path::{Path, PathBuf};
-use std::str::FromStr;
 use std::time::{SystemTime, UNIX_EPOCH};
 
 use fs4::fs_std::FileExt;
 use manifest::WorkerManifest;
+use protocol::WorkerId;
 use serde::{Deserialize, Serialize};
 use session_store::{SegmentId, SessionId};
 use thiserror::Error;
@@ -16,47 +15,10 @@ const RECORD_FILE: &str = "record.json";
 const COMMIT_MARKER: &str = "commit.pending";
 const LEASE_FILE: &str = "lease.json";
 const LEASE_LOCK_FILE: &str = "lease.lock";
-const SESSION_DIR: &str = "session";
+const SESSIONS_DIR: &str = "sessions";
 const WORKER_DIR: &str = "worker";
 const SCHEMA_VERSION: u32 = 1;
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
-#[serde(transparent)]
-pub struct StandaloneSessionId(Uuid);
-
-impl StandaloneSessionId {
-    #[must_use]
-    pub fn new() -> Self {
-        Self(Uuid::now_v7())
-    }
-
-    #[must_use]
-    pub fn short(self) -> String {
-        let simple = self.0.simple().to_string();
-        simple[simple.len() - 12..].to_string()
-    }
-}
-
-impl Default for StandaloneSessionId {
-    fn default() -> Self {
-        Self::new()
-    }
-}
-
-impl fmt::Display for StandaloneSessionId {
-    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
-        self.0.fmt(formatter)
-    }
-}
-
-impl FromStr for StandaloneSessionId {
-    type Err = uuid::Error;
-
-    fn from_str(value: &str) -> Result<Self, Self::Err> {
-        Uuid::parse_str(value).map(Self)
-    }
-}
-
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct StandaloneCwdIdentity {
     pub canonical_path: PathBuf,
@@ -100,7 +62,7 @@ impl StandaloneCwdIdentity {
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(rename_all = "snake_case")]
-pub enum StandaloneSessionStatus {
+pub enum StandaloneWorkerStatus {
     Active,
     Stopped,
 }
@@ -115,17 +77,20 @@ pub enum StandaloneShutdownReason {
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct StandaloneSessionRecord {
+pub struct StandaloneWorkerRecord {
     pub schema_version: u32,
     pub revision: u64,
-    pub session_id: StandaloneSessionId,
+    pub worker_id: WorkerId,
+    /// User-facing Worker name resolved from the profile.
     pub worker_name: String,
+    /// Internal key used by the current name-keyed Worker store.
+    pub storage_key: String,
     pub cwd: StandaloneCwdIdentity,
     pub manifest: WorkerManifest,
     pub active_session_id: SessionId,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub active_segment_id: Option<SegmentId>,
-    pub status: StandaloneSessionStatus,
+    pub status: StandaloneWorkerStatus,
     pub created_at_unix_ms: u64,
     pub updated_at_unix_ms: u64,
     #[serde(default, skip_serializing_if = "Option::is_none")]
@@ -145,11 +110,11 @@ pub enum StaleLeasePolicy {
 }
 
 #[derive(Debug, Clone)]
-pub struct StandaloneSessionStore {
+pub struct StandaloneWorkerStore {
     root: PathBuf,
 }
 
-impl StandaloneSessionStore {
+impl StandaloneWorkerStore {
     pub fn open(root: impl Into<PathBuf>) -> Result<Self, StandaloneStoreError> {
         let root = root.into();
         fs::create_dir_all(&root).map_err(StandaloneStoreError::Io)?;
@@ -171,35 +136,41 @@ impl StandaloneSessionStore {
         &self,
         cwd: impl AsRef<Path>,
         policy: StaleLeasePolicy,
-    ) -> Result<StandaloneSessionAllocation, StandaloneStoreError> {
-        let id = StandaloneSessionId::new();
+    ) -> Result<StandaloneWorkerAllocation, StandaloneStoreError> {
+        let worker_id = WorkerId::now_v7();
         let cwd = StandaloneCwdIdentity::capture(cwd)?;
-        let dir = self.session_dir(id);
+        let dir = self.worker_dir(worker_id);
         fs::create_dir(&dir).map_err(StandaloneStoreError::Io)?;
-        fs::create_dir(dir.join(SESSION_DIR)).map_err(StandaloneStoreError::Io)?;
+        fs::create_dir(dir.join(SESSIONS_DIR)).map_err(StandaloneStoreError::Io)?;
         fs::create_dir(dir.join(WORKER_DIR)).map_err(StandaloneStoreError::Io)?;
-        let lease = self.acquire_lease(id, policy)?;
-        Ok(StandaloneSessionAllocation { id, cwd, lease })
+        let lease = self.acquire_lease(worker_id, policy)?;
+        Ok(StandaloneWorkerAllocation {
+            worker_id,
+            cwd,
+            lease,
+        })
     }
 
     pub fn commit_created(
         &self,
-        allocation: &StandaloneSessionAllocation,
+        allocation: &StandaloneWorkerAllocation,
         manifest: WorkerManifest,
+        storage_key: String,
         active_session_id: SessionId,
         active_segment_id: Option<SegmentId>,
-    ) -> Result<StandaloneSessionRecord, StandaloneStoreError> {
+    ) -> Result<StandaloneWorkerRecord, StandaloneStoreError> {
         let now = now_unix_ms()?;
-        let record = StandaloneSessionRecord {
+        let record = StandaloneWorkerRecord {
             schema_version: SCHEMA_VERSION,
             revision: 1,
-            session_id: allocation.id,
+            worker_id: allocation.worker_id,
             worker_name: manifest.worker.name.clone(),
+            storage_key,
             cwd: allocation.cwd.clone(),
             manifest,
             active_session_id,
             active_segment_id,
-            status: StandaloneSessionStatus::Active,
+            status: StandaloneWorkerStatus::Active,
             created_at_unix_ms: now,
             updated_at_unix_ms: now,
             shutdown_reason: None,
@@ -208,22 +179,19 @@ impl StandaloneSessionStore {
         Ok(record)
     }
 
-    pub fn load(
-        &self,
-        id: StandaloneSessionId,
-    ) -> Result<StandaloneSessionRecord, StandaloneStoreError> {
-        let dir = self.session_dir(id);
+    pub fn load(&self, id: WorkerId) -> Result<StandaloneWorkerRecord, StandaloneStoreError> {
+        let dir = self.worker_dir(id);
         if dir.join(COMMIT_MARKER).exists() {
             return Err(StandaloneStoreError::IncompleteCommit(id));
         }
         let bytes = fs::read(dir.join(RECORD_FILE)).map_err(|error| {
             if error.kind() == io::ErrorKind::NotFound {
-                StandaloneStoreError::SessionNotFound(id)
+                StandaloneStoreError::WorkerNotFound(id)
             } else {
                 StandaloneStoreError::Io(error)
             }
         })?;
-        let record: StandaloneSessionRecord = serde_json::from_slice(&bytes)
+        let record: StandaloneWorkerRecord = serde_json::from_slice(&bytes)
             .map_err(|source| StandaloneStoreError::CorruptRecord { id, source })?;
         if record.schema_version > SCHEMA_VERSION {
             return Err(StandaloneStoreError::NewerSchema {
@@ -232,7 +200,7 @@ impl StandaloneSessionStore {
                 supported: SCHEMA_VERSION,
             });
         }
-        if record.schema_version != SCHEMA_VERSION || record.session_id != id {
+        if record.schema_version != SCHEMA_VERSION || record.worker_id != id {
             return Err(StandaloneStoreError::InvalidRecord(id));
         }
         Ok(record)
@@ -243,7 +211,7 @@ impl StandaloneSessionStore {
         cwd: impl AsRef<Path>,
         scope: StandaloneListScope,
         limit: usize,
-    ) -> Result<Vec<StandaloneSessionRecord>, StandaloneStoreError> {
+    ) -> Result<Vec<StandaloneWorkerRecord>, StandaloneStoreError> {
         let current_cwd = (scope == StandaloneListScope::CurrentCwd)
             .then(|| StandaloneCwdIdentity::capture(cwd))
             .transpose()?;
@@ -269,12 +237,7 @@ impl StandaloneSessionStore {
             right
                 .updated_at_unix_ms
                 .cmp(&left.updated_at_unix_ms)
-                .then_with(|| {
-                    right
-                        .session_id
-                        .to_string()
-                        .cmp(&left.session_id.to_string())
-                })
+                .then_with(|| right.worker_id.to_string().cmp(&left.worker_id.to_string()))
         });
         records.truncate(limit);
         Ok(records)
@@ -282,10 +245,10 @@ impl StandaloneSessionStore {
 
     pub fn acquire_lease(
         &self,
-        id: StandaloneSessionId,
+        id: WorkerId,
         policy: StaleLeasePolicy,
-    ) -> Result<StandaloneSessionLease, StandaloneStoreError> {
-        let dir = self.session_dir(id);
+    ) -> Result<StandaloneWorkerLease, StandaloneStoreError> {
+        let dir = self.worker_dir(id);
         let path = dir.join(LEASE_FILE);
         let _guard = LeaseMutationGuard::acquire(&dir)?;
         let lease = LeaseRecord::current()?;
@@ -296,7 +259,7 @@ impl StandaloneSessionStore {
                     file.write_all(b"\n").map_err(StandaloneStoreError::Io)?;
                     file.sync_all().map_err(StandaloneStoreError::Io)?;
                     sync_directory(&dir)?;
-                    return Ok(StandaloneSessionLease {
+                    return Ok(StandaloneWorkerLease {
                         path,
                         lease_id: lease.lease_id,
                         released: false,
@@ -306,7 +269,7 @@ impl StandaloneSessionStore {
                     let existing = read_lease(&path, id)?;
                     match existing.liveness() {
                         LeaseLiveness::Live => {
-                            return Err(StandaloneStoreError::SessionLeased(id));
+                            return Err(StandaloneStoreError::WorkerLeased(id));
                         }
                         LeaseLiveness::Unknown => {
                             return Err(StandaloneStoreError::LeaseLivenessUnknown(id));
@@ -326,16 +289,16 @@ impl StandaloneSessionStore {
 
     pub fn update_active_pointer(
         &self,
-        record: &StandaloneSessionRecord,
+        record: &StandaloneWorkerRecord,
         active_session_id: SessionId,
         active_segment_id: Option<SegmentId>,
-    ) -> Result<StandaloneSessionRecord, StandaloneStoreError> {
+    ) -> Result<StandaloneWorkerRecord, StandaloneStoreError> {
         let mut next = record.clone();
         next.revision = next.revision.saturating_add(1);
         next.updated_at_unix_ms = now_unix_ms()?;
         next.active_session_id = active_session_id;
         next.active_segment_id = active_segment_id;
-        next.status = StandaloneSessionStatus::Active;
+        next.status = StandaloneWorkerStatus::Active;
         next.shutdown_reason = None;
         self.commit_record(Some(record.revision), &next)?;
         Ok(next)
@@ -343,73 +306,73 @@ impl StandaloneSessionStore {
 
     pub fn mark_stopped(
         &self,
-        record: &StandaloneSessionRecord,
+        record: &StandaloneWorkerRecord,
         active_session_id: SessionId,
         active_segment_id: Option<SegmentId>,
         reason: StandaloneShutdownReason,
-    ) -> Result<StandaloneSessionRecord, StandaloneStoreError> {
+    ) -> Result<StandaloneWorkerRecord, StandaloneStoreError> {
         let mut next = record.clone();
         next.revision = next.revision.saturating_add(1);
         next.updated_at_unix_ms = now_unix_ms()?;
         next.active_session_id = active_session_id;
         next.active_segment_id = active_segment_id;
-        next.status = StandaloneSessionStatus::Stopped;
+        next.status = StandaloneWorkerStatus::Stopped;
         next.shutdown_reason = Some(reason);
         self.commit_record(Some(record.revision), &next)?;
         Ok(next)
     }
 
-    pub fn delete(&self, id: StandaloneSessionId) -> Result<(), StandaloneStoreError> {
+    pub fn delete(&self, id: WorkerId) -> Result<(), StandaloneStoreError> {
         let record = self.load(id)?;
-        if record.status != StandaloneSessionStatus::Stopped {
+        if record.status != StandaloneWorkerStatus::Stopped {
             return Err(StandaloneStoreError::DeleteActive(id));
         }
-        let session_dir = self.session_dir(id);
-        let _guard = LeaseMutationGuard::acquire(&session_dir)?;
-        let lease_path = session_dir.join(LEASE_FILE);
+        let worker_dir = self.worker_dir(id);
+        let _guard = LeaseMutationGuard::acquire(&worker_dir)?;
+        let lease_path = worker_dir.join(LEASE_FILE);
         if lease_path.exists() {
             let lease = read_lease(&lease_path, id)?;
             return Err(match lease.liveness() {
-                LeaseLiveness::Live => StandaloneStoreError::SessionLeased(id),
+                LeaseLiveness::Live => StandaloneStoreError::WorkerLeased(id),
                 LeaseLiveness::Stale => StandaloneStoreError::StaleLease(id),
                 LeaseLiveness::Unknown => StandaloneStoreError::LeaseLivenessUnknown(id),
             });
         }
-        fs::remove_dir_all(self.session_dir(id)).map_err(StandaloneStoreError::Io)?;
+        fs::remove_dir_all(self.worker_dir(id)).map_err(StandaloneStoreError::Io)?;
         sync_directory(&self.root)
     }
 
     #[must_use]
-    pub fn session_log_dir(&self, id: StandaloneSessionId) -> PathBuf {
-        self.session_dir(id).join(SESSION_DIR)
+    pub fn sessions_dir(&self, id: WorkerId) -> PathBuf {
+        self.worker_dir(id).join(SESSIONS_DIR)
     }
 
     #[must_use]
-    pub fn worker_metadata_dir(&self, id: StandaloneSessionId) -> PathBuf {
-        self.session_dir(id).join(WORKER_DIR)
+    pub fn worker_metadata_dir(&self, id: WorkerId) -> PathBuf {
+        self.worker_dir(id).join(WORKER_DIR)
     }
 
     #[must_use]
-    pub(crate) fn runtime_dir(&self, id: StandaloneSessionId) -> PathBuf {
-        self.session_dir(id).join("runtime")
+    pub(crate) fn runtime_dir(&self, id: WorkerId) -> PathBuf {
+        self.worker_dir(id).join("runtime")
     }
 
     pub(crate) fn abandon_allocation(
         &self,
-        allocation: StandaloneSessionAllocation,
+        allocation: StandaloneWorkerAllocation,
     ) -> Result<(), StandaloneStoreError> {
-        let id = allocation.id;
+        let worker_id = allocation.worker_id;
         allocation.lease.release()?;
-        fs::remove_dir_all(self.session_dir(id)).map_err(StandaloneStoreError::Io)?;
+        fs::remove_dir_all(self.worker_dir(worker_id)).map_err(StandaloneStoreError::Io)?;
         sync_directory(&self.root)
     }
 
     fn commit_record(
         &self,
         expected_revision: Option<u64>,
-        next: &StandaloneSessionRecord,
+        next: &StandaloneWorkerRecord,
     ) -> Result<(), StandaloneStoreError> {
-        let dir = self.session_dir(next.session_id);
+        let dir = self.worker_dir(next.worker_id);
         let marker = dir.join(COMMIT_MARKER);
         let mut marker_file = OpenOptions::new()
             .write(true)
@@ -417,7 +380,7 @@ impl StandaloneSessionStore {
             .open(&marker)
             .map_err(|error| {
                 if error.kind() == io::ErrorKind::AlreadyExists {
-                    StandaloneStoreError::IncompleteCommit(next.session_id)
+                    StandaloneStoreError::IncompleteCommit(next.worker_id)
                 } else {
                     StandaloneStoreError::Io(error)
                 }
@@ -427,11 +390,11 @@ impl StandaloneSessionStore {
         sync_directory(&dir)?;
 
         if let Some(expected) = expected_revision {
-            let current = self.load_record_while_committing(next.session_id)?;
+            let current = self.load_record_while_committing(next.worker_id)?;
             if current.revision != expected {
                 let _ = fs::remove_file(&marker);
                 return Err(StandaloneStoreError::RevisionConflict {
-                    id: next.session_id,
+                    id: next.worker_id,
                     expected,
                     found: current.revision,
                 });
@@ -461,30 +424,30 @@ impl StandaloneSessionStore {
 
     fn load_record_while_committing(
         &self,
-        id: StandaloneSessionId,
-    ) -> Result<StandaloneSessionRecord, StandaloneStoreError> {
+        id: WorkerId,
+    ) -> Result<StandaloneWorkerRecord, StandaloneStoreError> {
         let bytes =
-            fs::read(self.session_dir(id).join(RECORD_FILE)).map_err(StandaloneStoreError::Io)?;
+            fs::read(self.worker_dir(id).join(RECORD_FILE)).map_err(StandaloneStoreError::Io)?;
         serde_json::from_slice(&bytes)
             .map_err(|source| StandaloneStoreError::CorruptRecord { id, source })
     }
 
-    fn session_dir(&self, id: StandaloneSessionId) -> PathBuf {
+    fn worker_dir(&self, id: WorkerId) -> PathBuf {
         self.root.join(id.to_string())
     }
 }
 
 #[derive(Debug)]
-pub struct StandaloneSessionAllocation {
-    id: StandaloneSessionId,
+pub struct StandaloneWorkerAllocation {
+    worker_id: WorkerId,
     cwd: StandaloneCwdIdentity,
-    lease: StandaloneSessionLease,
+    lease: StandaloneWorkerLease,
 }
 
-impl StandaloneSessionAllocation {
+impl StandaloneWorkerAllocation {
     #[must_use]
-    pub fn id(&self) -> StandaloneSessionId {
-        self.id
+    pub fn worker_id(&self) -> WorkerId {
+        self.worker_id
     }
 
     #[must_use]
@@ -492,19 +455,19 @@ impl StandaloneSessionAllocation {
         &self.cwd
     }
 
-    pub fn into_lease(self) -> StandaloneSessionLease {
+    pub fn into_lease(self) -> StandaloneWorkerLease {
         self.lease
     }
 }
 
 #[derive(Debug)]
-pub struct StandaloneSessionLease {
+pub struct StandaloneWorkerLease {
     path: PathBuf,
     lease_id: Uuid,
     released: bool,
 }
 
-impl StandaloneSessionLease {
+impl StandaloneWorkerLease {
     pub fn release(mut self) -> Result<(), StandaloneStoreError> {
         self.release_inner()
     }
@@ -534,7 +497,7 @@ impl StandaloneSessionLease {
     }
 }
 
-impl Drop for StandaloneSessionLease {
+impl Drop for StandaloneWorkerLease {
     fn drop(&mut self) {
         let _ = self.release_inner();
     }
@@ -624,7 +587,7 @@ fn classify_lease_liveness(
     }
 }
 
-fn read_lease(path: &Path, id: StandaloneSessionId) -> Result<LeaseRecord, StandaloneStoreError> {
+fn read_lease(path: &Path, id: WorkerId) -> Result<LeaseRecord, StandaloneStoreError> {
     let bytes = fs::read(path).map_err(StandaloneStoreError::Io)?;
     serde_json::from_slice(&bytes)
         .map_err(|source| StandaloneStoreError::CorruptLease { id, source })
@@ -692,47 +655,47 @@ pub enum StandaloneStoreError {
     CwdUnavailable(#[source] io::Error),
     #[error("standalone cwd is not a directory")]
     CwdNotDirectory,
-    #[error("standalone cwd identity no longer matches the persisted session")]
+    #[error("standalone cwd identity no longer matches the persisted Worker")]
     CwdIdentityMismatch,
-    #[error("standalone session {0} was not found")]
-    SessionNotFound(StandaloneSessionId),
-    #[error("standalone session {0} has an incomplete metadata commit")]
-    IncompleteCommit(StandaloneSessionId),
-    #[error("standalone session {0} has invalid metadata")]
-    InvalidRecord(StandaloneSessionId),
-    #[error("standalone session {id} metadata is corrupt")]
+    #[error("standalone Worker {0} was not found")]
+    WorkerNotFound(WorkerId),
+    #[error("standalone Worker {0} has an incomplete metadata commit")]
+    IncompleteCommit(WorkerId),
+    #[error("standalone Worker {0} has invalid metadata")]
+    InvalidRecord(WorkerId),
+    #[error("standalone Worker {id} metadata is corrupt")]
     CorruptRecord {
-        id: StandaloneSessionId,
+        id: WorkerId,
         #[source]
         source: serde_json::Error,
     },
-    #[error("standalone session {id} lease is corrupt")]
+    #[error("standalone Worker {id} lease is corrupt")]
     CorruptLease {
-        id: StandaloneSessionId,
+        id: WorkerId,
         #[source]
         source: serde_json::Error,
     },
-    #[error("standalone session {id} uses schema {found}, newer than supported schema {supported}")]
+    #[error("standalone Worker {id} uses schema {found}, newer than supported schema {supported}")]
     NewerSchema {
-        id: StandaloneSessionId,
+        id: WorkerId,
         found: u32,
         supported: u32,
     },
-    #[error("standalone session {0} is already active")]
-    SessionLeased(StandaloneSessionId),
-    #[error("standalone session {0} lease liveness cannot be proven; recovery is rejected")]
-    LeaseLivenessUnknown(StandaloneSessionId),
-    #[error("standalone session {0} has a stale lease; explicit recovery is required")]
-    StaleLease(StandaloneSessionId),
-    #[error("standalone session lease ownership changed")]
+    #[error("standalone Worker {0} is already active")]
+    WorkerLeased(WorkerId),
+    #[error("standalone Worker {0} lease liveness cannot be proven; recovery is rejected")]
+    LeaseLivenessUnknown(WorkerId),
+    #[error("standalone Worker {0} has a stale lease; explicit recovery is required")]
+    StaleLease(WorkerId),
+    #[error("standalone Worker lease ownership changed")]
     LeaseOwnershipLost,
-    #[error("standalone session {0} must be stopped before deletion")]
-    DeleteActive(StandaloneSessionId),
+    #[error("standalone Worker {0} must be stopped before deletion")]
+    DeleteActive(WorkerId),
     #[error(
-        "standalone session {id} metadata revision changed (expected {expected}, found {found})"
+        "standalone Worker {id} metadata revision changed (expected {expected}, found {found})"
     )]
     RevisionConflict {
-        id: StandaloneSessionId,
+        id: WorkerId,
         expected: u64,
         found: u64,
     },

crates/standalone/tests/host.rs

@@ -8,11 +8,13 @@ use agen::llm_client::error::ClientError;
 use agen::llm_client::event::{Event as LlmEvent, StopReason};
 use agen::llm_client::types::Request;
 use async_trait::async_trait;
+use client::Client;
+use client::transport::in_process::Socket as InProcessSocket;
 use futures::{Stream, stream};
 use protocol::{Event, Method};
 use standalone::{
     StaleLeasePolicy, StandaloneHost, StandaloneLaunchConfig, StandaloneListScope,
-    StandaloneSessionStatus, StandaloneSessionStore, StandaloneStartupError, StandaloneStoreError,
+    StandaloneStartupError, StandaloneStoreError, StandaloneWorkerStatus, StandaloneWorkerStore,
 };
 use uuid::Uuid;
 
@@ -88,17 +90,35 @@ async fn in_process_host_runs_text_and_read_tool_then_shuts_down() {
     let host = StandaloneHost::start_with_model_client(launch, client)
         .await
         .expect("start in-process host");
-    let mut events = host.subscribe();
+    assert_eq!(host.record().worker_name, worker_name);
+    assert_eq!(host.record().manifest.worker.name, worker_name);
+    assert_eq!(
+        host.record().storage_key,
+        format!("standalone-{}", host.worker_id())
+    );
+    let mut protocol_client = host.connect();
 
-    host.send(Method::run_text("read the probe"))
+    protocol_client
+        .send(&Method::run_text("read the probe"))
         .await
         .expect("submit input");
 
     tokio::time::timeout(Duration::from_secs(30), async {
+        let mut saw_user_message = false;
         let mut saw_text = false;
         let mut saw_tool_result = false;
         loop {
-            match events.recv().await.expect("worker event") {
+            match protocol_client
+                .next_event()
+                .await
+                .expect("protocol event")
+                .expect("worker event")
+            {
+                Event::UserMessage { segments }
+                    if format!("{segments:?}").contains("read the probe") =>
+                {
+                    saw_user_message = true;
+                }
                 Event::TextDelta { text } if text.contains("standalone response") => {
                     saw_text = true;
                 }
@@ -106,6 +126,10 @@ async fn in_process_host_runs_text_and_read_tool_then_shuts_down() {
                     saw_tool_result = true;
                 }
                 Event::RunEnd { .. } => {
+                    assert!(
+                        saw_user_message,
+                        "stream must expose the committed user message"
+                    );
                     assert!(saw_text, "stream must expose the model text delta");
                     assert!(saw_tool_result, "stream must expose the tool result");
                     break;
@@ -220,7 +244,7 @@ type TestResult = Result<(), Box<dyn std::error::Error>>;
 async fn standalone_restore_preserves_history_tasks_notifications_and_cwd_scope() -> TestResult {
     let temp = tempfile::tempdir()?;
     let cwd = temp.path().join("project");
-    let state_dir = temp.path().join("client").join("standalone-sessions");
+    let state_dir = temp.path().join("client").join("standalone-workers");
     std::fs::create_dir_all(&cwd)?;
     let launch = StandaloneLaunchConfig::new(
         &cwd,
@@ -250,23 +274,26 @@ async fn standalone_restore_preserves_history_tasks_notifications_and_cwd_scope(
         ],
     ]);
     let host = StandaloneHost::start_with_model_client(launch, first_client).await?;
-    let session_id = host.session_id();
-    let mut events = host.subscribe();
-    host.send(Method::run_text("first request")).await?;
-    wait_for_run_end(&mut events).await?;
-    host.send(Method::Notify {
-        message: "persisted notification".to_string(),
-        auto_run: true,
-    })
-    .await?;
-    wait_for_run_end(&mut events).await?;
+    let worker_id = host.worker_id();
+    let mut protocol_client = host.connect();
+    protocol_client
+        .send(&Method::run_text("first request"))
+        .await?;
+    wait_for_run_end(&mut protocol_client).await?;
+    protocol_client
+        .send(&Method::Notify {
+            message: "persisted notification".to_string(),
+            auto_run: true,
+        })
+        .await?;
+    wait_for_run_end(&mut protocol_client).await?;
     host.shutdown().await?;
 
-    let store = StandaloneSessionStore::open(&state_dir)?;
+    let store = StandaloneWorkerStore::open(&state_dir)?;
     let current = store.list(&cwd, StandaloneListScope::CurrentCwd, 100)?;
     assert_eq!(current.len(), 1);
-    assert_eq!(current[0].session_id, session_id);
-    assert_eq!(current[0].status, StandaloneSessionStatus::Stopped);
+    assert_eq!(current[0].worker_id, worker_id);
+    assert_eq!(current[0].status, StandaloneWorkerStatus::Stopped);
     let other_cwd = temp.path().join("other");
     std::fs::create_dir(&other_cwd)?;
     assert!(
@@ -286,18 +313,31 @@ async fn standalone_restore_preserves_history_tasks_notifications_and_cwd_scope(
     ]]);
     let second_inspection = second_client.clone();
     let host =
-        StandaloneHost::restore_with_model_client(state_dir.clone(), session_id, second_client)
+        StandaloneHost::restore_with_model_client(state_dir.clone(), worker_id, second_client)
             .await?;
-    let snapshot = format!("{:?}", host.snapshot());
+    assert_eq!(
+        host.record().worker_name,
+        "display-name-is-not-session-identity"
+    );
+    assert_eq!(host.record().storage_key, format!("standalone-{worker_id}"));
+    let mut protocol_client = host.connect();
+    let snapshot = format!(
+        "{:?}",
+        protocol_client
+            .next_event()
+            .await
+            .expect("restored protocol stream")
+            .expect("restored snapshot")
+    );
     assert!(snapshot.contains("first request"), "{snapshot}");
     assert!(snapshot.contains("first answer"), "{snapshot}");
     assert!(snapshot.contains("persisted task"), "{snapshot}");
     assert!(snapshot.contains("persisted notification"), "{snapshot}");
 
-    let mut events = host.subscribe();
-    host.send(Method::run_text("continue after restore"))
+    protocol_client
+        .send(&Method::run_text("continue after restore"))
         .await?;
-    wait_for_run_end(&mut events).await?;
+    wait_for_run_end(&mut protocol_client).await?;
     let request = second_inspection
         .requests()
         .into_iter()
@@ -309,11 +349,11 @@ async fn standalone_restore_preserves_history_tasks_notifications_and_cwd_scope(
     assert!(projected.contains("persisted task"), "{projected}");
     host.shutdown().await?;
 
-    store.delete(session_id)?;
+    store.delete(worker_id)?;
     assert!(cwd.exists(), "deleting session state must not mutate cwd");
     assert!(matches!(
-        store.load(session_id),
-        Err(StandaloneStoreError::SessionNotFound(_))
+        store.load(worker_id),
+        Err(StandaloneStoreError::WorkerNotFound(_))
     ));
     Ok(())
 }
@@ -334,28 +374,25 @@ async fn standalone_restore_rejects_concurrent_lease_and_missing_cwd() -> TestRe
     .resolve()?;
     let host =
         StandaloneHost::start_with_model_client(launch, ScriptedClient::new(Vec::new())).await?;
-    let session_id = host.session_id();
-    let store = StandaloneSessionStore::open(&state_dir)?;
+    let worker_id = host.worker_id();
+    let store = StandaloneWorkerStore::open(&state_dir)?;
     assert!(matches!(
-        store.acquire_lease(session_id, StaleLeasePolicy::Recover),
-        Err(StandaloneStoreError::SessionLeased(id)) if id == session_id
+        store.acquire_lease(worker_id, StaleLeasePolicy::Recover),
+        Err(StandaloneStoreError::WorkerLeased(id)) if id == worker_id
     ));
     let restore = StandaloneHost::restore_with_model_client(
         state_dir.clone(),
-        session_id,
+        worker_id,
         ScriptedClient::new(Vec::new()),
     )
     .await;
-    assert!(matches!(
-        restore,
-        Err(StandaloneStartupError::SessionActive)
-    ));
+    assert!(matches!(restore, Err(StandaloneStartupError::WorkerActive)));
     host.shutdown().await?;
 
     std::fs::rename(&cwd, &moved)?;
     let restore = StandaloneHost::restore_with_model_client(
         state_dir,
-        session_id,
+        worker_id,
         ScriptedClient::new(Vec::new()),
     )
     .await;
@@ -392,11 +429,11 @@ async fn standalone_restore_recovers_only_a_proven_stale_lease() -> TestResult {
     });
     let host =
         StandaloneHost::start_with_model_client(launch, ScriptedClient::new(Vec::new())).await?;
-    let session_id = host.session_id();
+    let worker_id = host.worker_id();
     host.shutdown().await?;
-    let store = StandaloneSessionStore::open(&state_dir)?;
+    let store = StandaloneWorkerStore::open(&state_dir)?;
     assert!(matches!(
-        store.load(session_id)?.manifest.profile,
+        store.load(worker_id)?.manifest.profile,
         Some(manifest::ProfileManifestSnapshot {
             source: manifest::ProfileSource::Registry {
                 source: manifest::ProfileRegistrySource::User,
@@ -405,9 +442,9 @@ async fn standalone_restore_recovers_only_a_proven_stale_lease() -> TestResult {
             ..
         })
     ));
-    let session_dir = state_dir.join(session_id.to_string());
+    let worker_dir = state_dir.join(worker_id.to_string());
     std::fs::write(
-        session_dir.join("lease.json"),
+        worker_dir.join("lease.json"),
         serde_json::to_vec(&serde_json::json!({
             "lease_id": uuid::Uuid::now_v7(),
             "pid": u32::MAX,
@@ -418,7 +455,7 @@ async fn standalone_restore_recovers_only_a_proven_stale_lease() -> TestResult {
 
     let host = StandaloneHost::restore_with_model_client(
         state_dir,
-        session_id,
+        worker_id,
         ScriptedClient::new(Vec::new()),
     )
     .await?;
@@ -439,11 +476,11 @@ async fn standalone_restore_rejects_lease_with_missing_start_marker() -> TestRes
     .resolve()?;
     let host =
         StandaloneHost::start_with_model_client(launch, ScriptedClient::new(Vec::new())).await?;
-    let session_id = host.session_id();
+    let worker_id = host.worker_id();
     host.shutdown().await?;
-    let session_dir = state_dir.join(session_id.to_string());
+    let worker_dir = state_dir.join(worker_id.to_string());
     std::fs::write(
-        session_dir.join("lease.json"),
+        worker_dir.join("lease.json"),
         serde_json::to_vec(&serde_json::json!({
             "lease_id": uuid::Uuid::now_v7(),
             "pid": std::process::id(),
@@ -451,14 +488,14 @@ async fn standalone_restore_rejects_lease_with_missing_start_marker() -> TestRes
         }))?,
     )?;
 
-    let store = StandaloneSessionStore::open(&state_dir)?;
+    let store = StandaloneWorkerStore::open(&state_dir)?;
     assert!(matches!(
-        store.acquire_lease(session_id, StaleLeasePolicy::Recover),
-        Err(StandaloneStoreError::LeaseLivenessUnknown(id)) if id == session_id
+        store.acquire_lease(worker_id, StaleLeasePolicy::Recover),
+        Err(StandaloneStoreError::LeaseLivenessUnknown(id)) if id == worker_id
     ));
     let restore = StandaloneHost::restore_with_model_client(
         state_dir,
-        session_id,
+        worker_id,
         ScriptedClient::new(Vec::new()),
     )
     .await;
@@ -482,31 +519,31 @@ async fn standalone_metadata_fails_closed_on_incomplete_or_newer_records() -> Te
     .resolve()?;
     let host =
         StandaloneHost::start_with_model_client(launch, ScriptedClient::new(Vec::new())).await?;
-    let session_id = host.session_id();
+    let worker_id = host.worker_id();
     host.shutdown().await?;
-    let store = StandaloneSessionStore::open(&state_dir)?;
-    let session_dir = state_dir.join(session_id.to_string());
-    std::fs::write(session_dir.join("commit.pending"), b"interrupted\n")?;
+    let store = StandaloneWorkerStore::open(&state_dir)?;
+    let worker_dir = state_dir.join(worker_id.to_string());
+    std::fs::write(worker_dir.join("commit.pending"), b"interrupted\n")?;
     assert!(matches!(
-        store.load(session_id),
-        Err(StandaloneStoreError::IncompleteCommit(id)) if id == session_id
+        store.load(worker_id),
+        Err(StandaloneStoreError::IncompleteCommit(id)) if id == worker_id
     ));
-    std::fs::remove_file(session_dir.join("commit.pending"))?;
-    let record_path = session_dir.join("record.json");
+    std::fs::remove_file(worker_dir.join("commit.pending"))?;
+    let record_path = worker_dir.join("record.json");
     let mut record: serde_json::Value = serde_json::from_slice(&std::fs::read(&record_path)?)?;
     record["schema_version"] = serde_json::json!(u32::MAX);
     std::fs::write(&record_path, serde_json::to_vec_pretty(&record)?)?;
     assert!(matches!(
-        store.load(session_id),
-        Err(StandaloneStoreError::NewerSchema { id, .. }) if id == session_id
+        store.load(worker_id),
+        Err(StandaloneStoreError::NewerSchema { id, .. }) if id == worker_id
     ));
     Ok(())
 }
 
-async fn wait_for_run_end(events: &mut tokio::sync::broadcast::Receiver<Event>) -> TestResult {
+async fn wait_for_run_end(client: &mut Client<InProcessSocket>) -> TestResult {
     tokio::time::timeout(Duration::from_secs(10), async {
         loop {
-            if matches!(events.recv().await, Ok(Event::RunEnd { .. })) {
+            if matches!(client.next_event().await, Ok(Some(Event::RunEnd { .. }))) {
                 break;
             }
         }

crates/tools/src/bash.rs

@@ -21,6 +21,7 @@ struct BashParams {
 
 pub(crate) struct BashTool {
     session: WorkdirSessionHandle,
+    output_dir: PathBuf,
     state: Arc<Mutex<BashExecutionState>>,
 }
 
@@ -117,6 +118,7 @@ impl Tool for BashTool {
                 command: params.command,
                 timeout_secs,
                 output_limit: INLINE_BYTE_BUDGET,
+                spill_dir: Some(self.output_dir.clone()),
                 tool_call_id: Some(call_id.clone()),
             })
             .await
@@ -183,10 +185,15 @@ impl Tool for BashTool {
         let content = if output.content.is_empty() {
             None
         } else if output.truncated {
-            Some(format!(
-                "[showing bounded WorkdirSession command output; additional output was truncated]\n{}",
-                output.content
-            ))
+            let notice = match output.output_path {
+                Some(path) => format!(
+                    "[showing bounded WorkdirSession command output; full output saved to {}]",
+                    path.display()
+                ),
+                None => "[showing bounded WorkdirSession command output; additional output was truncated]"
+                    .to_owned(),
+            };
+            Some(format!("{notice}\n{}", output.content))
         } else {
             Some(output.content)
         };
@@ -259,16 +266,137 @@ fn truncate_for_summary(command: &str) -> String {
     summary
 }
 
-pub fn bash_tool(session: WorkdirSessionHandle, _output_dir: PathBuf) -> ToolDefinition {
+pub fn bash_tool(session: WorkdirSessionHandle, output_dir: PathBuf) -> ToolDefinition {
     Arc::new(move || {
         let schema = schemars::schema_for!(BashParams);
         let meta = ToolMeta::new("Bash")
-            .description("Execute a shell command in the bound Workdir. Process start, bounded output, timeout and cancellation are owned by the WorkdirSession provider. This is not a sandbox.")
+            .description("Execute a shell command in the bound Workdir. Process start, bounded inline output, full-output spill, timeout and cancellation are owned by the WorkdirSession provider. This is not a sandbox.")
             .input_schema(serde_json::to_value(schema).expect("Bash schema serialization"));
         let tool: Arc<dyn Tool> = Arc::new(BashTool {
             session: session.clone(),
+            output_dir: output_dir.clone(),
             state: Arc::new(Mutex::new(BashExecutionState::default())),
         });
         (meta, tool)
     })
 }
+
+#[cfg(test)]
+mod tests {
+    use std::sync::Arc;
+
+    use manifest::{Permission, Scope, ScopeConfig, ScopeRule};
+    use tempfile::TempDir;
+    use workdir::{LocalWorkdirSession, WorkdirSessionHandle};
+
+    use super::bash_tool;
+    use crate::{grep::grep_tool, read::read_tool, tracker::Tracker};
+
+    fn session_with_output_scope(root: &TempDir, output: &TempDir) -> WorkdirSessionHandle {
+        let scope = Scope::from_config(&ScopeConfig {
+            allow: vec![
+                ScopeRule {
+                    target: root.path().to_path_buf(),
+                    permission: Permission::Write,
+                    recursive: true,
+                },
+                ScopeRule {
+                    target: output.path().to_path_buf(),
+                    permission: Permission::Read,
+                    recursive: true,
+                },
+            ],
+            deny: Vec::new(),
+        })
+        .unwrap();
+        Arc::new(LocalWorkdirSession::new(scope, root.path().to_path_buf()))
+    }
+
+    #[tokio::test]
+    async fn long_output_is_spilled_and_available_to_read_and_grep() {
+        let root = TempDir::new().unwrap();
+        let output = TempDir::new().unwrap();
+        let session = session_with_output_scope(&root, &output);
+        let (_, bash) = bash_tool(session.clone(), output.path().to_path_buf())();
+        let command = "i=0; while [ $i -lt 2000 ]; do printf 'line-%04d\\n' \"$i\"; i=$((i+1)); done; printf 'FINAL-NEEDLE\\n'";
+        let result = bash
+            .execute(
+                &serde_json::json!({ "command": command }).to_string(),
+                Default::default(),
+            )
+            .await
+            .unwrap();
+        let rendered = result.content.expect("bounded Bash output");
+        let artifact = std::fs::read_dir(output.path())
+            .unwrap()
+            .next()
+            .expect("artifact entry")
+            .unwrap()
+            .path();
+
+        assert!(rendered.contains("full output saved to"));
+        assert!(rendered.contains(&artifact.display().to_string()));
+        let retained = std::fs::read_to_string(&artifact).unwrap();
+        assert!(retained.starts_with("line-0000\n"));
+        assert!(retained.ends_with("FINAL-NEEDLE\n"));
+        assert_eq!(retained.lines().count(), 2001);
+
+        let (_, read) = read_tool(session.clone(), Tracker::new())();
+        let read_result = read
+            .execute(
+                &serde_json::json!({
+                    "file_path": artifact,
+                    "offset": 2000,
+                    "limit": 1,
+                })
+                .to_string(),
+                Default::default(),
+            )
+            .await
+            .unwrap();
+        assert!(
+            read_result
+                .content
+                .expect("Read content")
+                .contains("FINAL-NEEDLE")
+        );
+
+        let (_, grep) = grep_tool(session)();
+        let grep_result = grep
+            .execute(
+                &serde_json::json!({
+                    "pattern": "FINAL-NEEDLE",
+                    "path": artifact,
+                    "output_mode": "content",
+                })
+                .to_string(),
+                Default::default(),
+            )
+            .await
+            .unwrap();
+        let grep_content = grep_result.content.expect("Grep content");
+        assert!(
+            grep_content.contains("FINAL-NEEDLE"),
+            "unexpected Grep content: {grep_content:?}"
+        );
+    }
+
+    #[tokio::test]
+    async fn short_output_does_not_leave_a_spill_artifact() {
+        let root = TempDir::new().unwrap();
+        let output = TempDir::new().unwrap();
+        let session = session_with_output_scope(&root, &output);
+        let (_, bash) = bash_tool(session, output.path().to_path_buf())();
+
+        let result = bash
+            .execute(
+                &serde_json::json!({ "command": "printf short" }).to_string(),
+                Default::default(),
+            )
+            .await
+            .unwrap();
+
+        assert_eq!(result.content.as_deref(), Some("short"));
+        assert_eq!(std::fs::read_dir(output.path()).unwrap().count(), 0);
+    }
+}

crates/tools/src/grep.rs

@@ -22,7 +22,7 @@ enum OutputMode {
 #[derive(Debug, Deserialize, JsonSchema)]
 struct GrepParams {
     pattern: String,
-    /// Logical Workdir-relative file or directory to search. Defaults to the Workdir root.
+    /// Workdir-relative path, or an absolute path covered by readable scope. Defaults to the Workdir root.
     #[serde(default)]
     path: Option<String>,
     #[serde(default)]
@@ -61,7 +61,7 @@ impl Tool for GrepTool {
         let params: GrepParams = serde_json::from_str(input_json)
             .map_err(|error| ToolError::InvalidArgument(format!("invalid Grep input: {error}")))?;
         let path = match params.path {
-            Some(path) => WorkdirPath::new(&path).map_err(ToolsError::from)?,
+            Some(path) => WorkdirPath::new_scoped(&path).map_err(ToolsError::from)?,
             None => WorkdirPath::root(),
         };
         let mode = match params.output_mode.unwrap_or_default() {

crates/tools/src/read.rs

@@ -13,14 +13,14 @@ use workdir::{ReadRequest, WorkdirPath, WorkdirSessionHandle};
 const DESCRIPTION: &str = "Read a text file from the local filesystem. \
 Supports offset/limit for large files. Returns line-numbered output (1-based). \
 Directories cannot be read. The file must be read before Write or Edit can \
-modify it. Paths are relative to the bound Workdir.";
+modify it. Paths are Workdir-relative unless an absolute path is explicitly readable.";
 
 const DEFAULT_LIMIT: usize = 2000;
 const PROVIDER_BYTE_LIMIT: usize = 256 * 1024;
 
 #[derive(Debug, Deserialize, schemars::JsonSchema)]
 pub(crate) struct ReadParams {
-    /// Logical path relative to the bound Workdir root.
+    /// Workdir-relative path, or an absolute path covered by readable scope.
     pub file_path: String,
     /// 0-based line offset from the start. Defaults to 0.
     #[serde(default)]
@@ -47,7 +47,7 @@ impl Tool for ReadTool {
         let offset = params.offset.unwrap_or(0);
         let limit = params.limit.unwrap_or(DEFAULT_LIMIT).max(1);
 
-        let path = WorkdirPath::new(&params.file_path).map_err(ToolsError::from)?;
+        let path = WorkdirPath::new_scoped(&params.file_path).map_err(ToolsError::from)?;
         tracing::debug!(path = %path, offset, limit, "Read");
 
         let result = self

crates/tools/tests/edge_cases.rs

@@ -224,20 +224,23 @@ async fn very_long_single_line() {
 }
 
 #[tokio::test]
-async fn absolute_path_is_rejected() {
-    let (dir, _spill, reg) = setup();
+async fn absolute_path_requires_matching_read_scope() {
+    let (_dir, _spill, reg) = setup();
+    let outside = tempfile::tempdir().unwrap();
+    let outside_file = outside.path().join("outside.txt");
+    std::fs::write(&outside_file, "secret").unwrap();
     let read = reg.get("Read");
     let err = read
         .execute(
-            &json!({ "file_path": dir.path().join("outside.txt") }).to_string(),
+            &json!({ "file_path": outside_file }).to_string(),
             Default::default(),
         )
         .await
         .unwrap_err();
     let msg = format!("{err}");
     assert!(
-        msg.contains("invalid logical filesystem path"),
-        "absolute path was not rejected as invalid: {msg}"
+        msg.contains("outside allowed scope"),
+        "absolute path escaped readable scope: {msg}"
     );
 }
 

crates/tools/tests/integration.rs

@@ -394,14 +394,21 @@ async fn bash_inherits_workdir_cwd() {
 }
 
 #[tokio::test]
-async fn bash_provider_output_does_not_expose_internal_paths() {
+async fn bash_provider_output_exposes_readable_retained_path() {
     let (_dir, spill, reg) = setup();
     let bash = reg.get("Bash");
     let out = call(&bash, json!({ "command": "printf 'x%.0s' {1..20480}" })).await;
     let body = out.content.unwrap();
     assert!(body.contains("bounded WorkdirSession command output"));
-    assert!(!body.contains(spill.path().to_str().unwrap()));
-    assert_eq!(std::fs::read_dir(spill.path()).unwrap().count(), 0);
+    assert!(body.contains("full output saved to"));
+    assert!(body.contains(spill.path().to_str().unwrap()));
+    let artifact = std::fs::read_dir(spill.path())
+        .unwrap()
+        .next()
+        .expect("retained output")
+        .unwrap()
+        .path();
+    assert_eq!(std::fs::metadata(artifact).unwrap().len(), 20_480);
 }
 
 #[tokio::test]

crates/tui/src/app.rs

@@ -249,6 +249,9 @@ pub struct App {
     pub running: bool,
     /// True while the Worker is in `WorkerStatus::Paused`.
     pub paused: bool,
+    /// Local observation time for the current run. Used only for live UI
+    /// elapsed time and spinner animation; it is not persisted in history.
+    pub run_started_at: Option<Instant>,
     pub run_requests: usize,
     /// Sum of `input_tokens - cache_read_input_tokens` across the
     /// current turn's LLM requests — i.e. the net tokens this turn
@@ -281,6 +284,9 @@ pub struct App {
     /// records the instant; a second press within the timeout exits the
     /// TUI (the Worker itself stays alive).
     pub quit_confirm: Option<std::time::Instant>,
+    /// Independent 2-tap guard for `Ctrl-X` when the Worker is idle or
+    /// stopped. A second press within the timeout shuts down the Worker.
+    pub shutdown_confirm: Option<std::time::Instant>,
     /// Full display history in render order.
     pub blocks: Vec<Block>,
     /// Turn/protocol errors retained when a real `SegmentStart` replaces the
@@ -352,6 +358,7 @@ impl App {
             worker_status: WorkerStatus::Idle,
             running: false,
             paused: false,
+            run_started_at: None,
             run_requests: 0,
             run_upload_tokens: 0,
             run_output_tokens: 0,
@@ -369,6 +376,7 @@ impl App {
             command_completion_selected: None,
             quit: false,
             quit_confirm: None,
+            shutdown_confirm: None,
             blocks: Vec::new(),
             run_error_messages: Vec::new(),
             internal_workers: Vec::new(),
@@ -553,11 +561,18 @@ impl App {
     }
 
     pub fn set_worker_status(&mut self, status: WorkerStatus) {
+        let was_running = self.running;
         self.worker_status = status;
         self.running = status == WorkerStatus::Running;
         self.paused = status == WorkerStatus::Paused;
         if self.running {
+            if !was_running {
+                self.run_started_at = Some(Instant::now());
+            }
             self.quit_confirm = None;
+            self.shutdown_confirm = None;
+        } else {
+            self.run_started_at = None;
         }
     }
 
@@ -1121,11 +1136,13 @@ impl App {
                 self.latest_llm_wait_event = None;
                 self.assistant_streaming = false;
             }
-            // UI consumers of Invoke / LlmCall semantics are out of scope
-            // for `tickets/invoke-turn-llmcall-semantics.md`; events flow
-            // through to subscribers but the TUI currently derives its
-            // turn header from `UserMessage` / `SystemItem` arrivals.
-            Event::InvokeStart { .. } | Event::LlmCallStart { .. } | Event::LlmCallEnd { .. } => {
+            Event::InvokeStart { .. } => {
+                self.set_worker_status(WorkerStatus::Running);
+            }
+            // UI consumers of per-attempt LlmCall semantics remain out of scope;
+            // the run-level status starts at InvokeStart and TurnStart counts each
+            // LLM request within that run.
+            Event::LlmCallStart { .. } | Event::LlmCallEnd { .. } => {
                 self.latest_llm_wait_event = None;
             }
             Event::LlmRetry {
@@ -3377,6 +3394,17 @@ mod completion_flow_tests {
         }
     }
 
+    #[test]
+    fn running_status_starts_and_stops_live_run_clock() {
+        let mut app = App::new("test".into());
+
+        app.set_worker_status(WorkerStatus::Running);
+        assert!(app.run_started_at.is_some());
+
+        app.set_worker_status(WorkerStatus::Idle);
+        assert!(app.run_started_at.is_none());
+    }
+
     #[test]
     fn running_submit_is_queued_locally_and_clears_composer() {
         let mut app = App::new("test".into());

crates/tui/src/console/mod.rs

@@ -21,10 +21,11 @@ use protocol::{Greeting, RewindSummary, RewindTarget, RewindTargetId, Segment};
 use ratatui::Terminal;
 use ratatui::backend::CrosstermBackend;
 use standalone::{StandaloneHost, StandaloneLaunchConfig};
-use tokio::sync::{broadcast, mpsc};
+use tokio::sync::mpsc;
 
 use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64_STANDARD};
-use client::{BackendRuntimeClient, BackendRuntimeTarget, StandaloneSessionResumeIntent};
+use client::transport::Socket;
+use client::{BackendRuntimeTarget, Client, StandaloneWorkerResumeIntent, connect_backend_runtime};
 
 use crate::app::{ActionbarNoticeLevel, ActionbarNoticeSource, App};
 use crate::composer_keys::{ComposerEditAction, composer_edit_action};
@@ -119,74 +120,40 @@ fn copy_selection_to_terminal(app: &mut App) -> bool {
     copy_selection_to_writer(app, &mut stdout)
 }
 
-enum ConsoleConnection {
-    BackendRuntime(BackendRuntimeClient),
-    Standalone {
-        host: Option<StandaloneHost>,
-        events: broadcast::Receiver<Event>,
-        initial_snapshot: Option<Event>,
-    },
+struct ConsoleConnection<T> {
+    client: Client<T>,
+    standalone_host: Option<StandaloneHost>,
 }
 
-impl ConsoleConnection {
-    fn standalone(host: StandaloneHost) -> Self {
-        let events = host.subscribe();
-        let initial_snapshot = Some(host.snapshot());
-        Self::Standalone {
-            host: Some(host),
-            events,
-            initial_snapshot,
+impl<T: Socket> ConsoleConnection<T> {
+    fn new(client: Client<T>) -> Self {
+        Self {
+            client,
+            standalone_host: None,
         }
     }
 
-    fn try_next_event(&mut self) -> Option<Event> {
-        match self {
-            Self::BackendRuntime(client) => client.try_next_event(),
-            Self::Standalone {
-                events,
-                initial_snapshot,
-                ..
-            } => initial_snapshot.take().or_else(|| events.try_recv().ok()),
+    fn with_standalone_host(client: Client<T>, host: StandaloneHost) -> Self {
+        Self {
+            client,
+            standalone_host: Some(host),
         }
     }
 
-    async fn next_event(&mut self) -> Option<Event> {
-        match self {
-            Self::BackendRuntime(client) => client.next_event().await,
-            Self::Standalone { host, events, .. } => loop {
-                match events.recv().await {
-                    Ok(event) => break Some(event),
-                    Err(broadcast::error::RecvError::Lagged(_)) => {
-                        let Some(host) = host.as_ref() else {
-                            break None;
-                        };
-                        break Some(host.snapshot());
-                    }
-                    Err(broadcast::error::RecvError::Closed) => break None,
-                }
-            },
-        }
+    fn try_next_event(&mut self) -> Result<Option<Event>, Box<dyn std::error::Error>> {
+        Ok(self.client.try_next_event()?)
+    }
+
+    async fn next_event(&mut self) -> Result<Option<Event>, Box<dyn std::error::Error>> {
+        Ok(self.client.next_event().await?)
     }
 
     async fn send(&mut self, method: &Method) -> Result<(), Box<dyn std::error::Error>> {
-        match self {
-            Self::BackendRuntime(client) => Ok(client.send(method).await?),
-            Self::Standalone { host, .. } => {
-                let host = host.as_ref().ok_or_else(|| {
-                    io::Error::new(
-                        io::ErrorKind::BrokenPipe,
-                        "Standalone Worker has already shut down",
-                    )
-                })?;
-                Ok(host.send(method.clone()).await?)
-            }
-        }
+        Ok(self.client.send(method).await?)
     }
 
     async fn shutdown(&mut self) -> Result<(), Box<dyn std::error::Error>> {
-        if let Self::Standalone { host, .. } = self
-            && let Some(host) = host.take()
-        {
+        if let Some(host) = self.standalone_host.take() {
             host.shutdown().await?;
         }
         Ok(())
@@ -224,18 +191,18 @@ pub(crate) async fn run_standalone(
 }
 
 pub(crate) async fn run_standalone_restore(
-    intent: StandaloneSessionResumeIntent,
+    intent: StandaloneWorkerResumeIntent,
 ) -> Result<(), Box<dyn std::error::Error>> {
-    let session_id = intent.session_id.parse().map_err(|error| {
+    let worker_id = intent.worker_id.parse().map_err(|error| {
         io::Error::new(
             io::ErrorKind::InvalidInput,
-            format!("Invalid standalone session ID: {error}"),
+            format!("Invalid standalone Worker ID: {error}"),
         )
     })?;
-    let host = StandaloneHost::restore(intent.state_dir, session_id)
+    let host = StandaloneHost::restore(intent.state_dir, worker_id)
         .await
         .map_err(|error| io::Error::other(format!("Standalone restore failed: {error}")))?;
-    let worker_label = format!("standalone-{}", session_id.short());
+    let worker_label = host.record().worker_name.clone();
     let history_root = host.record().cwd.canonical_path.clone();
     run_standalone_host(host, worker_label, history_root).await
 }
@@ -251,7 +218,8 @@ async fn run_standalone_host(
     worker_label: String,
     history_root: PathBuf,
 ) -> Result<(), Box<dyn std::error::Error>> {
-    let mut connection = ConsoleConnection::standalone(host);
+    let client = host.connect();
+    let mut connection = ConsoleConnection::with_standalone_host(client, host);
 
     let mut terminal = match enter_fullscreen() {
         Ok(terminal) => terminal,
@@ -280,12 +248,12 @@ pub(crate) async fn run_backend_runtime(
     target: BackendRuntimeTarget,
 ) -> Result<(), Box<dyn std::error::Error>> {
     let worker_label = target.display_label();
-    let client = BackendRuntimeClient::connect(target).await?;
+    let client = connect_backend_runtime(target).await?;
     let mut terminal = enter_fullscreen()?;
     let workspace_root = std::env::current_dir().unwrap_or_else(|_| std::path::PathBuf::from("."));
     let mut app = App::new_with_persistent_input_history(worker_label, &workspace_root);
     app.connected = true;
-    let mut connection = ConsoleConnection::BackendRuntime(client);
+    let mut connection = ConsoleConnection::new(client);
     let result = run_loop(&mut terminal, &mut app, &mut connection).await;
     let _ = leave_fullscreen(&mut terminal);
     result
@@ -560,16 +528,20 @@ enum E2eRewindInput {
 
 enum LoopInput<P> {
     Terminal(TerminalEventResult),
-    Worker(Option<P>),
+    Worker(P),
+    Tick,
 }
 
-async fn next_loop_input<P, F>(
+async fn next_loop_input<P, F, T>(
     term_rx: &mut mpsc::UnboundedReceiver<TerminalEventResult>,
     connected: bool,
     pod_next: F,
+    animate: bool,
+    animation_tick: T,
 ) -> LoopInput<P>
 where
-    F: Future<Output = Option<P>>,
+    F: Future<Output = P>,
+    T: Future,
 {
     tokio::select! {
         biased;
@@ -583,12 +555,13 @@ where
             }))
         }
         event = pod_next, if connected => LoopInput::Worker(event),
+        _ = animation_tick, if animate => LoopInput::Tick,
     }
 }
 
-async fn drain_terminal_events(
+async fn drain_terminal_events<T: Socket>(
     app: &mut App,
-    client: &mut ConsoleConnection,
+    client: &mut ConsoleConnection<T>,
     term_rx: &mut mpsc::UnboundedReceiver<TerminalEventResult>,
 ) -> Result<bool, Box<dyn std::error::Error>> {
     let mut handled = false;
@@ -613,13 +586,13 @@ async fn drain_terminal_events(
     Ok(handled)
 }
 
-async fn drain_worker_events(
+async fn drain_worker_events<T: Socket>(
     app: &mut App,
-    client: &mut ConsoleConnection,
+    client: &mut ConsoleConnection<T>,
 ) -> Result<bool, Box<dyn std::error::Error>> {
     let mut handled = false;
     for _ in 0..POD_EVENT_DRAIN_LIMIT {
-        match client.try_next_event() {
+        match client.try_next_event()? {
             Some(ev) => {
                 handled = true;
                 if let Some(method) = app.handle_worker_event(ev) {
@@ -632,12 +605,14 @@ async fn drain_worker_events(
     Ok(handled)
 }
 
-async fn run_loop(
+async fn run_loop<T: Socket>(
     terminal: &mut Terminal<CrosstermBackend<io::Stdout>>,
     app: &mut App,
-    client: &mut ConsoleConnection,
+    client: &mut ConsoleConnection<T>,
 ) -> Result<(), Box<dyn std::error::Error>> {
     let (_terminal_reader, mut term_rx) = TerminalEventReader::spawn()?;
+    let mut animation_tick = tokio::time::interval(Duration::from_millis(80));
+    animation_tick.set_missed_tick_behavior(tokio::time::MissedTickBehavior::Skip);
 
     terminal.draw(|f| ui::draw(f, app))?;
 
@@ -656,11 +631,19 @@ async fn run_loop(
             continue;
         }
 
-        match next_loop_input(&mut term_rx, app.connected, client.next_event()).await {
+        match next_loop_input(
+            &mut term_rx,
+            app.connected,
+            client.next_event(),
+            app.running,
+            animation_tick.tick(),
+        )
+        .await
+        {
             LoopInput::Terminal(term_event) => {
                 handle_terminal_event(app, client, term_event?).await?;
             }
-            LoopInput::Worker(event) => match event {
+            LoopInput::Worker(event) => match event? {
                 Some(ev) => {
                     if let Some(method) = app.handle_worker_event(ev) {
                         client.send(&method).await?;
@@ -672,6 +655,7 @@ async fn run_loop(
                     app.push_error("Connection lost");
                 }
             },
+            LoopInput::Tick => {}
         }
 
         terminal.draw(|f| ui::draw(f, app))?;
@@ -680,9 +664,9 @@ async fn run_loop(
     Ok(())
 }
 
-async fn handle_terminal_event(
+async fn handle_terminal_event<T: Socket>(
     app: &mut App,
-    client: &mut ConsoleConnection,
+    client: &mut ConsoleConnection<T>,
     event: TermEvent,
 ) -> Result<(), Box<dyn std::error::Error>> {
     match event {
@@ -838,13 +822,7 @@ fn handle_key(app: &mut App, key: KeyEvent) -> Option<Method> {
             Some(None)
         }
         KeyCode::Char('c') if ctrl => Some(handle_pause_or_quit(app)),
-        KeyCode::Char('x') if ctrl => Some(match app.worker_status {
-            WorkerStatus::Running | WorkerStatus::Paused => {
-                app.clear_queued_inputs();
-                Some(Method::Cancel)
-            }
-            WorkerStatus::Idle | WorkerStatus::Stopped => Some(Method::Shutdown),
-        }),
+        KeyCode::Char('x') if ctrl => Some(handle_cancel_or_shutdown(app)),
         KeyCode::Char('d') if ctrl => {
             app.quit = true;
             Some(None)
@@ -1101,6 +1079,33 @@ fn handle_command_key(app: &mut App, key: KeyEvent) -> Option<Method> {
 
 const CONFIRM_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(3);
 
+/// Running / Paused → send `Method::Cancel` immediately.
+/// Idle / Stopped → 2-tap to shut down the Worker.
+fn handle_cancel_or_shutdown(app: &mut App) -> Option<Method> {
+    if matches!(
+        app.worker_status,
+        WorkerStatus::Running | WorkerStatus::Paused
+    ) {
+        app.shutdown_confirm = None;
+        app.clear_queued_inputs();
+        return Some(Method::Cancel);
+    }
+    if let Some(pressed_at) = app.shutdown_confirm
+        && pressed_at.elapsed() < CONFIRM_TIMEOUT
+    {
+        app.shutdown_confirm = None;
+        return Some(Method::Shutdown);
+    }
+    app.shutdown_confirm = Some(std::time::Instant::now());
+    app.flash_actionbar_notice(
+        "Press Ctrl-X again within 3 s to shut down the Worker.",
+        ActionbarNoticeLevel::Warn,
+        ActionbarNoticeSource::Tui,
+        CONFIRM_TIMEOUT,
+    );
+    None
+}
+
 /// Running → send `Method::Pause`.
 /// Idle / Paused → 2-tap to quit the TUI (the Worker keeps running).
 fn handle_pause_or_quit(app: &mut App) -> Option<Method> {
@@ -1246,6 +1251,23 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn animation_tick_wakes_loop_while_running() {
+        let (_tx, mut rx) = mpsc::unbounded_channel::<TerminalEventResult>();
+
+        assert!(matches!(
+            next_loop_input(
+                &mut rx,
+                true,
+                std::future::pending::<Option<u8>>(),
+                true,
+                std::future::ready(()),
+            )
+            .await,
+            LoopInput::Tick
+        ));
+    }
+
     #[tokio::test]
     async fn terminal_event_is_selected_before_ready_worker_event() {
         let (tx, mut rx) = mpsc::unbounded_channel();
@@ -1255,7 +1277,15 @@ mod tests {
         ))))
         .unwrap();
 
-        match next_loop_input(&mut rx, true, std::future::ready(Some(()))).await {
+        match next_loop_input(
+            &mut rx,
+            true,
+            std::future::ready(Some(())),
+            false,
+            std::future::pending::<()>(),
+        )
+        .await
+        {
             LoopInput::Terminal(Ok(TermEvent::Key(key))) => {
                 assert_eq!(key.code, KeyCode::Char('x'));
             }
@@ -1267,7 +1297,15 @@ mod tests {
     async fn terminal_event_is_preserved_after_worker_event_wins() {
         let (tx, mut rx) = mpsc::unbounded_channel();
 
-        match next_loop_input(&mut rx, true, std::future::ready(Some(1_u8))).await {
+        match next_loop_input(
+            &mut rx,
+            true,
+            std::future::ready(Some(1_u8)),
+            false,
+            std::future::pending::<()>(),
+        )
+        .await
+        {
             LoopInput::Worker(Some(1)) => {}
             _ => panic!("expected the first ready Worker event to win before any terminal input"),
         }
@@ -1278,7 +1316,15 @@ mod tests {
         ))))
         .unwrap();
 
-        match next_loop_input(&mut rx, true, std::future::ready(Some(2_u8))).await {
+        match next_loop_input(
+            &mut rx,
+            true,
+            std::future::ready(Some(2_u8)),
+            false,
+            std::future::pending::<()>(),
+        )
+        .await
+        {
             LoopInput::Terminal(Ok(TermEvent::Key(key))) => {
                 assert_eq!(key.code, KeyCode::Char('y'));
             }
@@ -1445,15 +1491,53 @@ mod tests {
     }
 
     #[test]
-    fn ctrl_x_shutdown_while_idle_is_unchanged() {
+    fn ctrl_x_requires_confirmation_before_shutdown_while_idle() {
+        let mut app = App::new("agent".to_string());
+        app.set_worker_status(WorkerStatus::Idle);
+        let ctrl_x = || KeyEvent::new(KeyCode::Char('x'), KeyModifiers::CONTROL);
+
+        assert!(handle_key(&mut app, ctrl_x()).is_none());
+        assert!(app.shutdown_confirm.is_some());
+        let notice = app
+            .current_actionbar_notice(std::time::Instant::now())
+            .expect("first Ctrl-X should arm shutdown confirmation");
+        assert_eq!(notice.level, ActionbarNoticeLevel::Warn);
+        assert_eq!(notice.source, ActionbarNoticeSource::Tui);
+        assert!(notice.text.contains("Ctrl-X"));
+        assert!(notice.text.contains("shut down the Worker"));
+        assert!(!has_alert(&app, "shut down the Worker"));
+
+        assert!(matches!(
+            handle_key(&mut app, ctrl_x()),
+            Some(Method::Shutdown)
+        ));
+        assert!(app.shutdown_confirm.is_none());
+    }
+
+    #[test]
+    fn ctrl_c_and_ctrl_x_confirmations_do_not_authorize_each_other() {
         let mut app = App::new("agent".to_string());
         app.set_worker_status(WorkerStatus::Idle);
 
-        let shutdown = handle_key(
-            &mut app,
-            KeyEvent::new(KeyCode::Char('x'), KeyModifiers::CONTROL),
+        assert!(
+            handle_key(
+                &mut app,
+                KeyEvent::new(KeyCode::Char('c'), KeyModifiers::CONTROL),
+            )
+            .is_none()
         );
-        assert!(matches!(shutdown, Some(Method::Shutdown)));
+        assert!(app.quit_confirm.is_some());
+        assert!(app.shutdown_confirm.is_none());
+
+        assert!(
+            handle_key(
+                &mut app,
+                KeyEvent::new(KeyCode::Char('x'), KeyModifiers::CONTROL),
+            )
+            .is_none()
+        );
+        assert!(!app.quit);
+        assert!(app.shutdown_confirm.is_some());
     }
 
     #[test]
@@ -2169,12 +2253,17 @@ mod tests {
         handle_key(&mut app, key(KeyCode::Tab));
         assert_eq!(app.selected_worker_view().worker_name, "subworker-hoge");
 
-        let method = handle_key(
+        let first = handle_key(
+            &mut app,
+            KeyEvent::new(KeyCode::Char('x'), KeyModifiers::CONTROL),
+        );
+        let second = handle_key(
             &mut app,
             KeyEvent::new(KeyCode::Char('x'), KeyModifiers::CONTROL),
         );
 
-        assert!(matches!(method, Some(Method::Shutdown)));
+        assert!(first.is_none());
+        assert!(matches!(second, Some(Method::Shutdown)));
         assert_eq!(app.worker_status, WorkerStatus::Idle);
     }
 

crates/tui/src/lib.rs

@@ -16,6 +16,7 @@ mod markdown;
 mod scroll;
 pub mod setup_model;
 mod standalone_picker;
+mod standalone_spawn;
 mod task;
 mod text_selection;
 mod tool;
@@ -46,8 +47,8 @@ pub enum LaunchMode {
         worker_name: Option<String>,
         profile: Option<String>,
     },
-    /// Restore one client-owned standalone session. The current cwd is the default scope;
-    /// `include_all` opts into all standalone sessions under the same client data root.
+    /// Restore one client-owned standalone Worker. The current cwd is the default scope;
+    /// `include_all` opts into all standalone Workers under the same client data root.
     StandaloneResume { include_all: bool },
     /// List Backend Workers and attach to the selected Worker.
     Workers {
@@ -136,17 +137,21 @@ pub async fn launch(options: LaunchOptions) -> ExitCode {
         LaunchMode::Spawn {
             worker_name,
             profile,
-        } => match target.spawn_worker() {
-            Ok(spawn) => {
-                console::run_standalone(
-                    workspace_root.clone(),
-                    spawn.state_dir,
-                    worker_name,
-                    profile,
-                )
-                .await
-            }
-            Err(e) => Err(Box::new(e) as Box<dyn std::error::Error>),
+        } => match standalone_spawn::select(&workspace_root, worker_name, profile) {
+            Ok(Some(selection)) => match target.spawn_worker() {
+                Ok(spawn) => {
+                    console::run_standalone(
+                        workspace_root.clone(),
+                        spawn.state_dir,
+                        Some(selection.worker_name),
+                        Some(selection.profile),
+                    )
+                    .await
+                }
+                Err(error) => Err(Box::new(error) as Box<dyn std::error::Error>),
+            },
+            Ok(None) => Ok(()),
+            Err(error) => Err(Box::new(error) as Box<dyn std::error::Error>),
         },
         LaunchMode::StandaloneResume { include_all } => {
             match standalone_picker::pick(target.as_ref(), include_all) {

crates/tui/src/standalone_picker.rs

@@ -1,7 +1,7 @@
 use std::io;
 use std::time::Duration;
 
-use client::{StandaloneSessionListIntent, StandaloneSessionResumeIntent, Target};
+use client::{StandaloneWorkerListIntent, StandaloneWorkerResumeIntent, Target};
 use crossterm::event::{self, Event as TermEvent, KeyCode, KeyEventKind, KeyModifiers};
 use ratatui::Terminal;
 use ratatui::backend::CrosstermBackend;
@@ -9,7 +9,7 @@ use ratatui::layout::{Constraint, Layout};
 use ratatui::prelude::{Color, Line, Modifier, Span, Style};
 use ratatui::widgets::Paragraph;
 use ratatui::{TerminalOptions, Viewport};
-use standalone::{StandaloneListScope, StandaloneSessionRecord, StandaloneSessionStore};
+use standalone::{StandaloneListScope, StandaloneWorkerRecord, StandaloneWorkerStore};
 use thiserror::Error;
 
 const LIMIT: usize = 100;
@@ -17,28 +17,28 @@ const LIMIT: usize = 100;
 pub(crate) fn pick(
     target: &dyn Target,
     include_all: bool,
-) -> Result<Option<StandaloneSessionResumeIntent>, StandalonePickerError> {
+) -> Result<Option<StandaloneWorkerResumeIntent>, StandalonePickerError> {
     let intent = target
-        .standalone_session_list(include_all)
+        .standalone_worker_list(include_all)
         .map_err(StandalonePickerError::Target)?;
     let records = load_records(&intent)?;
     if records.is_empty() {
-        return Err(StandalonePickerError::NoSessions { include_all });
+        return Err(StandalonePickerError::NoWorkers { include_all });
     }
     let selected = run_picker(records)?;
     selected
         .map(|record| {
             target
-                .standalone_session_resume(record.session_id.to_string())
+                .standalone_worker_resume(record.worker_id.to_string())
                 .map_err(StandalonePickerError::Target)
         })
         .transpose()
 }
 
 fn load_records(
-    intent: &StandaloneSessionListIntent,
-) -> Result<Vec<StandaloneSessionRecord>, StandalonePickerError> {
-    let store = StandaloneSessionStore::open(&intent.state_dir)
+    intent: &StandaloneWorkerListIntent,
+) -> Result<Vec<StandaloneWorkerRecord>, StandalonePickerError> {
+    let store = StandaloneWorkerStore::open(&intent.state_dir)
         .map_err(StandalonePickerError::StateStore)?;
     store
         .list(
@@ -54,8 +54,8 @@ fn load_records(
 }
 
 fn run_picker(
-    records: Vec<StandaloneSessionRecord>,
-) -> Result<Option<StandaloneSessionRecord>, StandalonePickerError> {
+    records: Vec<StandaloneWorkerRecord>,
+) -> Result<Option<StandaloneWorkerRecord>, StandalonePickerError> {
     let height = u16::try_from(records.len().saturating_add(3).min(20)).unwrap_or(20);
     let mut terminal = Terminal::with_options(
         CrosstermBackend::new(io::stdout()),
@@ -94,14 +94,14 @@ fn run_picker(
     }
 }
 
-fn draw(frame: &mut ratatui::Frame<'_>, records: &[StandaloneSessionRecord], selected: usize) {
+fn draw(frame: &mut ratatui::Frame<'_>, records: &[StandaloneWorkerRecord], selected: usize) {
     let mut constraints = vec![Constraint::Length(1)];
     constraints.extend(records.iter().map(|_| Constraint::Length(1)));
     constraints.push(Constraint::Length(1));
     let rows = Layout::vertical(constraints).split(frame.area());
     frame.render_widget(
         Paragraph::new(Line::from(Span::styled(
-            "resume standalone session",
+            "resume standalone Worker",
             Style::default().add_modifier(Modifier::BOLD),
         ))),
         rows[0],
@@ -120,7 +120,10 @@ fn draw(frame: &mut ratatui::Frame<'_>, records: &[StandaloneSessionRecord], sel
         frame.render_widget(
             Paragraph::new(Line::from(vec![
                 Span::raw(marker),
-                Span::styled(record.session_id.short(), style),
+                Span::styled(
+                    format!("{} ({})", record.worker_name, record.worker_id.short()),
+                    style,
+                ),
                 Span::raw(format!(
                     "  [{:?}]  updated:{}  {}",
                     record.status, record.updated_at_unix_ms, cwd
@@ -139,13 +142,13 @@ fn draw(frame: &mut ratatui::Frame<'_>, records: &[StandaloneSessionRecord], sel
 pub(crate) enum StandalonePickerError {
     #[error("standalone target error: {0}")]
     Target(#[source] client::TargetError),
-    #[error("standalone session state is unavailable: {0}")]
+    #[error("standalone Worker state is unavailable: {0}")]
     StateStore(#[source] standalone::StandaloneStoreError),
     #[error(
-        "no standalone sessions found for this cwd; use `yoi --local --resume --all` to include all cwd identities"
+        "no standalone Workers found for this cwd; use `yoi --local --resume --all` to include all cwd identities"
     )]
-    NoSessions { include_all: bool },
-    #[error("standalone session picker I/O failed: {0}")]
+    NoWorkers { include_all: bool },
+    #[error("standalone Worker picker I/O failed: {0}")]
     Io(#[source] io::Error),
 }
 

crates/tui/src/standalone_spawn.rs

@@ -0,0 +1,494 @@
+use std::io::{self, Stdout};
+use std::path::Path;
+use std::time::Duration;
+
+use crossterm::event::{self, Event, KeyCode, KeyEvent, KeyEventKind, KeyModifiers};
+use manifest::ProfileDiscovery;
+use ratatui::Terminal;
+use ratatui::backend::CrosstermBackend;
+use ratatui::layout::{Constraint, Direction, Layout};
+use ratatui::style::{Color, Modifier, Style};
+use ratatui::text::{Line, Span};
+use ratatui::widgets::Paragraph;
+use thiserror::Error;
+
+const VIEWPORT_HEIGHT: u16 = 6;
+const FALLBACK_WORKER_NAME: &str = "worker";
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub(crate) struct StandaloneSpawnSelection {
+    pub worker_name: String,
+    pub profile: String,
+}
+
+#[derive(Debug, Error)]
+pub(crate) enum StandaloneSpawnError {
+    #[error("profile discovery failed: {0}")]
+    ProfileDiscovery(#[from] manifest::ProfileError),
+    #[error("no profiles are available")]
+    NoProfiles,
+    #[error("standalone spawn picker terminal error: {0}")]
+    Terminal(#[from] io::Error),
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+struct ProfileChoice {
+    selector: String,
+    label: String,
+    is_default: bool,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum StatusKind {
+    Info,
+    Progress,
+    Error,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+enum SpawnAction {
+    None,
+    Submit,
+    Cancel,
+}
+
+struct SpawnForm {
+    worker_name: String,
+    cursor: usize,
+    profile_choices: Vec<ProfileChoice>,
+    selected_profile: usize,
+    status: Option<(String, StatusKind)>,
+}
+
+impl SpawnForm {
+    fn new(
+        worker_name: Option<String>,
+        default_worker_name: String,
+        profile_choices: Vec<ProfileChoice>,
+    ) -> Self {
+        let worker_name = worker_name.unwrap_or(default_worker_name);
+        let cursor = worker_name.chars().count();
+        let selected_profile = profile_choices
+            .iter()
+            .position(|choice| choice.is_default)
+            .unwrap_or(0);
+        Self {
+            worker_name,
+            cursor,
+            profile_choices,
+            selected_profile,
+            status: None,
+        }
+    }
+
+    fn selected_profile(&self) -> &ProfileChoice {
+        &self.profile_choices[self.selected_profile]
+    }
+
+    fn apply_key(&mut self, key: KeyEvent) -> SpawnAction {
+        if key.kind == KeyEventKind::Release {
+            return SpawnAction::None;
+        }
+
+        if key.modifiers.contains(KeyModifiers::CONTROL) {
+            match key.code {
+                KeyCode::Char('c') | KeyCode::Char('u') => return SpawnAction::Cancel,
+                _ => return SpawnAction::None,
+            }
+        }
+
+        self.status = None;
+        match key.code {
+            KeyCode::Esc => SpawnAction::Cancel,
+            KeyCode::Enter => {
+                if self.worker_name.trim().is_empty() {
+                    self.status =
+                        Some(("worker name cannot be empty".to_owned(), StatusKind::Error));
+                    SpawnAction::None
+                } else {
+                    SpawnAction::Submit
+                }
+            }
+            KeyCode::Tab | KeyCode::Down => {
+                self.selected_profile = (self.selected_profile + 1) % self.profile_choices.len();
+                SpawnAction::None
+            }
+            KeyCode::BackTab | KeyCode::Up => {
+                self.selected_profile = if self.selected_profile == 0 {
+                    self.profile_choices.len() - 1
+                } else {
+                    self.selected_profile - 1
+                };
+                SpawnAction::None
+            }
+            KeyCode::Left => {
+                self.cursor = self.cursor.saturating_sub(1);
+                SpawnAction::None
+            }
+            KeyCode::Right => {
+                self.cursor = (self.cursor + 1).min(self.worker_name.chars().count());
+                SpawnAction::None
+            }
+            KeyCode::Home => {
+                self.cursor = 0;
+                SpawnAction::None
+            }
+            KeyCode::End => {
+                self.cursor = self.worker_name.chars().count();
+                SpawnAction::None
+            }
+            KeyCode::Backspace => {
+                if self.cursor > 0 {
+                    let idx = byte_index(&self.worker_name, self.cursor - 1);
+                    self.worker_name.remove(idx);
+                    self.cursor -= 1;
+                }
+                SpawnAction::None
+            }
+            KeyCode::Delete => {
+                if self.cursor < self.worker_name.chars().count() {
+                    let idx = byte_index(&self.worker_name, self.cursor);
+                    self.worker_name.remove(idx);
+                }
+                SpawnAction::None
+            }
+            KeyCode::Char(ch) if is_safe_worker_char(ch) => {
+                let idx = byte_index(&self.worker_name, self.cursor);
+                self.worker_name.insert(idx, ch);
+                self.cursor += 1;
+                SpawnAction::None
+            }
+            _ => SpawnAction::None,
+        }
+    }
+}
+
+pub(crate) fn select(
+    workspace_root: &Path,
+    worker_name: Option<String>,
+    profile: Option<String>,
+) -> Result<Option<StandaloneSpawnSelection>, StandaloneSpawnError> {
+    let default_worker_name = default_worker_name(workspace_root);
+    if let Some(profile) = profile {
+        return Ok(Some(StandaloneSpawnSelection {
+            worker_name: worker_name.unwrap_or(default_worker_name),
+            profile,
+        }));
+    }
+
+    let registry = ProfileDiscovery::user_settings().discover()?;
+    let choices = profile_choices(&registry);
+    if choices.is_empty() {
+        return Err(StandaloneSpawnError::NoProfiles);
+    }
+
+    let terminal = open_inline_terminal()?;
+    run_picker(
+        terminal,
+        SpawnForm::new(worker_name, default_worker_name, choices),
+    )
+}
+
+fn run_picker(
+    mut terminal: Terminal<CrosstermBackend<Stdout>>,
+    mut form: SpawnForm,
+) -> Result<Option<StandaloneSpawnSelection>, StandaloneSpawnError> {
+    loop {
+        terminal.draw(|frame| draw_form(frame, &form))?;
+        if !event::poll(Duration::from_millis(100))? {
+            continue;
+        }
+        let Event::Key(key) = event::read()? else {
+            continue;
+        };
+
+        match form.apply_key(key) {
+            SpawnAction::None => {}
+            SpawnAction::Cancel => {
+                form.status = Some(("cancelled".to_owned(), StatusKind::Info));
+                terminal.draw(|frame| draw_form(frame, &form))?;
+                return Ok(None);
+            }
+            SpawnAction::Submit => {
+                let selection = StandaloneSpawnSelection {
+                    worker_name: form.worker_name.trim().to_owned(),
+                    profile: form.selected_profile().selector.clone(),
+                };
+                form.status = Some(("starting worker...".to_owned(), StatusKind::Progress));
+                terminal.draw(|frame| draw_form(frame, &form))?;
+                return Ok(Some(selection));
+            }
+        }
+    }
+}
+
+fn open_inline_terminal() -> io::Result<Terminal<CrosstermBackend<Stdout>>> {
+    let options = ratatui::TerminalOptions {
+        viewport: ratatui::Viewport::Inline(VIEWPORT_HEIGHT),
+    };
+    Terminal::with_options(CrosstermBackend::new(io::stdout()), options)
+}
+
+fn profile_choices(registry: &manifest::ProfileRegistry) -> Vec<ProfileChoice> {
+    registry
+        .entries()
+        .iter()
+        .map(|entry| {
+            let selector = entry.qualified_name();
+            let default_marker = if entry.is_default { " (default)" } else { "" };
+            let mut label = format!("{selector}{default_marker}");
+            if let Some(description) = &entry.description {
+                label.push_str(" — ");
+                label.push_str(description);
+            }
+            ProfileChoice {
+                selector,
+                label,
+                is_default: entry.is_default,
+            }
+        })
+        .collect()
+}
+
+fn draw_form(frame: &mut ratatui::Frame<'_>, form: &SpawnForm) {
+    let chunks = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(1),
+            Constraint::Length(1),
+            Constraint::Length(1),
+            Constraint::Length(1),
+            Constraint::Length(1),
+            Constraint::Min(0),
+        ])
+        .split(frame.area());
+
+    frame.render_widget(
+        Paragraph::new(Line::from(vec![
+            Span::raw("  "),
+            Span::styled(
+                "spawn worker",
+                Style::default().add_modifier(Modifier::BOLD),
+            ),
+        ])),
+        chunks[0],
+    );
+
+    frame.render_widget(
+        Paragraph::new(Line::from(vec![
+            Span::raw("  "),
+            Span::styled("name: ", Style::default().fg(Color::DarkGray)),
+            Span::styled(
+                &form.worker_name,
+                Style::default()
+                    .fg(Color::Cyan)
+                    .add_modifier(Modifier::BOLD),
+            ),
+        ])),
+        chunks[1],
+    );
+
+    frame.render_widget(
+        Paragraph::new(Line::from(vec![
+            Span::raw("  "),
+            Span::styled("profile: ", Style::default().fg(Color::DarkGray)),
+            Span::styled(
+                &form.selected_profile().label,
+                Style::default().fg(Color::Green),
+            ),
+            Span::styled(
+                "  (tab/down to change)",
+                Style::default().fg(Color::DarkGray),
+            ),
+        ])),
+        chunks[2],
+    );
+
+    frame.render_widget(
+        Paragraph::new(Line::from(Span::styled(
+            "  enter spawn · left/right edit · esc cancel",
+            Style::default().fg(Color::DarkGray),
+        ))),
+        chunks[3],
+    );
+
+    let (message, color) = form
+        .status
+        .as_ref()
+        .map(|(message, kind)| {
+            let color = match kind {
+                StatusKind::Info => Color::DarkGray,
+                StatusKind::Progress => Color::Yellow,
+                StatusKind::Error => Color::Red,
+            };
+            (message.as_str(), color)
+        })
+        .unwrap_or(("", Color::Reset));
+    frame.render_widget(
+        Paragraph::new(Line::from(vec![
+            Span::raw("  "),
+            Span::styled(message, Style::default().fg(color)),
+        ])),
+        chunks[4],
+    );
+
+    let prefix_width = "  name: ".chars().count() as u16;
+    let x = chunks[1]
+        .x
+        .saturating_add(prefix_width)
+        .saturating_add(form.cursor as u16)
+        .min(chunks[1].right().saturating_sub(1));
+    frame.set_cursor_position((x, chunks[1].y));
+}
+
+fn default_worker_name(workspace_root: &Path) -> String {
+    workspace_root
+        .file_name()
+        .and_then(|name| name.to_str())
+        .map(sanitise_default_name)
+        .filter(|name| !name.is_empty())
+        .unwrap_or_else(|| FALLBACK_WORKER_NAME.to_owned())
+}
+
+fn sanitise_default_name(name: &str) -> String {
+    name.chars()
+        .map(|ch| if is_safe_worker_char(ch) { ch } else { '-' })
+        .collect()
+}
+
+fn is_safe_worker_char(ch: char) -> bool {
+    ch.is_ascii_alphanumeric() || matches!(ch, '-' | '_' | '.')
+}
+
+fn byte_index(input: &str, char_index: usize) -> usize {
+    input
+        .char_indices()
+        .nth(char_index)
+        .map_or(input.len(), |(idx, _)| idx)
+}
+
+#[cfg(test)]
+mod tests {
+    use crossterm::event::{KeyEvent, KeyModifiers};
+
+    use super::*;
+
+    fn choices() -> Vec<ProfileChoice> {
+        vec![
+            ProfileChoice {
+                selector: "builtin:default".to_owned(),
+                label: "builtin:default (default) — Default".to_owned(),
+                is_default: true,
+            },
+            ProfileChoice {
+                selector: "builtin:coder".to_owned(),
+                label: "builtin:coder — Coder".to_owned(),
+                is_default: false,
+            },
+        ]
+    }
+
+    #[test]
+    fn default_form_preserves_old_spawn_layout_defaults() {
+        let form = SpawnForm::new(None, "yoi".to_owned(), choices());
+        assert_eq!(form.worker_name, "yoi");
+        assert_eq!(form.selected_profile().selector, "builtin:default");
+    }
+
+    #[test]
+    fn tab_and_arrows_cycle_profiles() {
+        let mut form = SpawnForm::new(None, "yoi".to_owned(), choices());
+        assert_eq!(
+            form.apply_key(KeyEvent::new(KeyCode::Tab, KeyModifiers::NONE)),
+            SpawnAction::None
+        );
+        assert_eq!(form.selected_profile().selector, "builtin:coder");
+        form.apply_key(KeyEvent::new(KeyCode::Down, KeyModifiers::NONE));
+        assert_eq!(form.selected_profile().selector, "builtin:default");
+        form.apply_key(KeyEvent::new(KeyCode::Up, KeyModifiers::NONE));
+        assert_eq!(form.selected_profile().selector, "builtin:coder");
+    }
+
+    #[test]
+    fn name_input_uses_old_safe_character_policy() {
+        let mut form = SpawnForm::new(Some("worker".to_owned()), "yoi".to_owned(), choices());
+        form.apply_key(KeyEvent::new(KeyCode::Char('-'), KeyModifiers::NONE));
+        form.apply_key(KeyEvent::new(KeyCode::Char('1'), KeyModifiers::NONE));
+        form.apply_key(KeyEvent::new(KeyCode::Char('/'), KeyModifiers::NONE));
+        assert_eq!(form.worker_name, "worker-1");
+    }
+
+    #[test]
+    fn enter_rejects_empty_name_and_escape_cancels() {
+        let mut form = SpawnForm::new(Some(String::new()), "yoi".to_owned(), choices());
+        assert_eq!(
+            form.apply_key(KeyEvent::new(KeyCode::Enter, KeyModifiers::NONE)),
+            SpawnAction::None
+        );
+        assert_eq!(
+            form.status.as_ref().map(|(message, _)| message.as_str()),
+            Some("worker name cannot be empty")
+        );
+        assert_eq!(
+            form.apply_key(KeyEvent::new(KeyCode::Esc, KeyModifiers::NONE)),
+            SpawnAction::Cancel
+        );
+    }
+
+    #[test]
+    fn renderer_preserves_legacy_inline_spawn_form() {
+        let backend = ratatui::backend::TestBackend::new(100, VIEWPORT_HEIGHT);
+        let mut terminal = ratatui::Terminal::new(backend).unwrap();
+        let form = SpawnForm::new(None, "yoi".to_owned(), choices());
+        terminal.draw(|frame| draw_form(frame, &form)).unwrap();
+        let buffer = terminal.backend().buffer();
+        let rendered = buffer
+            .content
+            .chunks(buffer.area.width as usize)
+            .map(|row| row.iter().map(|cell| cell.symbol()).collect::<String>())
+            .collect::<Vec<_>>()
+            .join("\n");
+
+        assert!(rendered.contains("spawn worker"));
+        assert!(rendered.contains("name: yoi"));
+        assert!(rendered.contains("profile: builtin:default (default) — Default"));
+        assert!(rendered.contains("enter spawn · left/right edit · esc cancel"));
+    }
+
+    #[test]
+    fn builtin_discovery_produces_a_default_profile_choice() {
+        let registry = ProfileDiscovery::with_sources(None, None)
+            .discover()
+            .unwrap();
+        let choices = profile_choices(&registry);
+        let default = choices.iter().find(|choice| choice.is_default).unwrap();
+        assert_eq!(default.selector, "builtin:default");
+        assert!(default.label.contains("(default)"));
+    }
+
+    #[test]
+    fn default_worker_name_comes_from_sanitised_directory_basename() {
+        assert_eq!(
+            default_worker_name(Path::new("/home/hare/Project/yoi")),
+            "yoi"
+        );
+        assert_eq!(
+            default_worker_name(Path::new("/home/hare/Project/my project")),
+            "my-project"
+        );
+        assert_eq!(default_worker_name(Path::new("/")), "worker");
+    }
+
+    #[test]
+    fn explicit_profile_bypasses_discovery_and_uses_directory_name() {
+        let selection = select(
+            Path::new("/home/hare/Project/yoi"),
+            None,
+            Some("builtin:coder".to_owned()),
+        )
+        .unwrap()
+        .unwrap();
+        assert_eq!(selection.worker_name, "yoi");
+        assert_eq!(selection.profile, "builtin:coder");
+    }
+}

crates/tui/src/ui.rs

@@ -36,6 +36,9 @@ use crate::task::{TaskCounts, TaskEntry, TaskStatus, TaskStore};
 use crate::text_selection::{HistoryViewport, SelectionRow};
 use crate::view_mode::Mode;
 
+const RUN_SPINNER_FRAMES: [&str; 8] = ["⣷", "⣯", "⣟", "⡿", "⢿", "⣻", "⣽", "⣾"];
+const RUN_SPINNER_FRAME_MS: u128 = 80;
+
 pub fn draw(frame: &mut Frame, app: &mut App) {
     let area = frame.area();
     // Input content starts after the prompt (`> ` or `: `), so the width
@@ -57,19 +60,27 @@ pub fn draw(frame: &mut Frame, app: &mut App) {
     let tabs = app.worker_view_tabs();
     let show_tabs = tabs.len() > 1;
     let mini_view_h = task_mini_view_height(&app.selected_worker_view().task_store, show_tabs);
-    // One blank row separates the history tail from the mini-view so
-    // the latest message doesn't visually crash into the task summary.
-    // Folds away with the mini-view when there are no tasks.
-    let mini_view_gap = if mini_view_h > 0 { 1 } else { 0 };
+    let run_status_h = u16::from(app.running);
+    let run_status_gap = run_status_h;
+    // One blank row separates the history tail from the run/task mini-view so
+    // the latest message doesn't visually crash into operational status.
+    // Folds away when neither run status nor tasks are visible.
+    let mini_view_gap = if mini_view_h > 0 || run_status_h > 0 {
+        1
+    } else {
+        0
+    };
 
     let chunks = Layout::vertical([
-        Constraint::Min(0),                // history view
-        Constraint::Length(mini_view_gap), // gap above mini-view
-        Constraint::Length(mini_view_h),   // task mini-view (0 when empty)
-        Constraint::Length(1),             // separator
-        Constraint::Length(1),             // status
-        Constraint::Length(input_height),  // input area
-        Constraint::Length(1),             // actionbar
+        Constraint::Min(0),                 // history view
+        Constraint::Length(mini_view_gap),  // gap above run/task mini-view
+        Constraint::Length(run_status_h),   // active run status
+        Constraint::Length(run_status_gap), // gap below active run status
+        Constraint::Length(mini_view_h),    // task mini-view (0 when empty)
+        Constraint::Length(1),              // separator
+        Constraint::Length(1),              // status
+        Constraint::Length(input_height),   // input area
+        Constraint::Length(1),              // actionbar
     ])
     .split(area);
 
@@ -82,24 +93,27 @@ pub fn draw(frame: &mut Frame, app: &mut App) {
     } else {
         draw_history(frame, app, chunks[0]);
     }
+    if run_status_h > 0 {
+        draw_run_status(frame, app, chunks[2]);
+    }
     if mini_view_h > 0 {
         draw_task_mini_view(
             frame,
             &app.selected_worker_view().task_store,
             &tabs,
-            chunks[2],
+            chunks[4],
         );
     }
-    draw_separator(frame, chunks[3]);
+    draw_separator(frame, chunks[5]);
     // Status/composer/control surfaces remain parent-owned. View selection changes
     // only transcript/task presentation and never implies SubWorker control.
-    draw_status(frame, app, chunks[4]);
-    draw_input(frame, app, &input_render, chunks[5]);
-    draw_actionbar(frame, app, chunks[6]);
+    draw_status(frame, app, chunks[6]);
+    draw_input(frame, app, &input_render, chunks[7]);
+    draw_actionbar(frame, app, chunks[8]);
     if app.is_command_mode() {
-        draw_command_popup(frame, app, chunks[5]);
+        draw_command_popup(frame, app, chunks[7]);
     } else if let Some(state) = app.completion.as_ref().filter(|c| c.is_active()) {
-        draw_completion_popup(frame, state, chunks[5]);
+        draw_completion_popup(frame, state, chunks[7]);
     }
 }
 
@@ -120,6 +134,65 @@ fn task_mini_view_height(store: &TaskStore, show_tabs: bool) -> u16 {
     (active_shown as u16).saturating_add(1)
 }
 
+fn draw_run_status(frame: &mut Frame, app: &App, area: Rect) {
+    frame.render_widget(Paragraph::new(run_status_line(app, Instant::now())), area);
+}
+
+fn run_status_line(app: &App, now: Instant) -> Line<'static> {
+    let elapsed = app
+        .run_started_at
+        .and_then(|started_at| now.checked_duration_since(started_at))
+        .unwrap_or_default();
+    let spinner_index =
+        ((elapsed.as_millis() / RUN_SPINNER_FRAME_MS) as usize) % RUN_SPINNER_FRAMES.len();
+    let request_label = if app.run_requests == 1 {
+        "1 req".to_owned()
+    } else {
+        format!("{} reqs", app.run_requests)
+    };
+
+    Line::from(vec![
+        Span::styled(
+            RUN_SPINNER_FRAMES[spinner_index],
+            Style::default()
+                .fg(Color::Cyan)
+                .add_modifier(Modifier::BOLD),
+        ),
+        Span::raw(" "),
+        Span::styled(
+            fmt_run_elapsed(elapsed.as_secs()),
+            Style::default().fg(Color::Gray),
+        ),
+        Span::styled(" ・ ", Style::default().fg(Color::DarkGray)),
+        Span::styled(request_label, Style::default().fg(Color::Gray)),
+        Span::styled(" | ", Style::default().fg(Color::DarkGray)),
+        Span::styled("↑", Style::default().fg(Color::Green)),
+        Span::styled(
+            fmt_tokens(app.run_upload_tokens),
+            Style::default().fg(Color::Green),
+        ),
+        Span::styled("/", Style::default().fg(Color::DarkGray)),
+        Span::styled("↓", Style::default().fg(Color::Yellow)),
+        Span::styled(
+            fmt_tokens(app.run_output_tokens),
+            Style::default().fg(Color::Yellow),
+        ),
+    ])
+}
+
+fn fmt_run_elapsed(secs: u64) -> String {
+    let hours = secs / 3600;
+    let minutes = (secs % 3600) / 60;
+    let seconds = secs % 60;
+    if hours > 0 {
+        format!("{hours}h {minutes}m {seconds:02}s")
+    } else if minutes > 0 {
+        format!("{minutes}m {seconds:02}s")
+    } else {
+        format!("{seconds}s")
+    }
+}
+
 fn draw_task_mini_view(frame: &mut Frame, store: &TaskStore, tabs: &[WorkerViewTab], area: Rect) {
     if area.height == 0 || area.width == 0 {
         return;
@@ -1726,32 +1799,7 @@ fn draw_status(frame: &mut Frame, app: &App, area: Rect) {
         ),
     ];
 
-    if app.running {
-        let status = if let Some(wait_event) = &app.latest_llm_wait_event {
-            format!(
-                "request: {} | ↑{}/↓{} | {wait_event}",
-                app.run_requests,
-                fmt_tokens(app.run_upload_tokens),
-                fmt_tokens(app.run_output_tokens),
-            )
-        } else if let Some(tool) = &app.current_tool {
-            format!(
-                "request: {} | ↑{}/↓{} | tool: {tool}",
-                app.run_requests,
-                fmt_tokens(app.run_upload_tokens),
-                fmt_tokens(app.run_output_tokens),
-            )
-        } else {
-            format!(
-                "request: {} | ↑{}/↓{}",
-                app.run_requests,
-                fmt_tokens(app.run_upload_tokens),
-                fmt_tokens(app.run_output_tokens),
-            )
-        };
-        spans.push(Span::raw(" | "));
-        spans.push(Span::styled(status, Style::default().fg(Color::Yellow)));
-    } else if app.paused {
+    if app.paused {
         spans.push(Span::raw(" | "));
         spans.push(Span::styled(
             "paused",
@@ -1763,7 +1811,7 @@ fn draw_status(frame: &mut Frame, app: &App, area: Rect) {
             " — Enter to resume, Ctrl-X to cancel, type to start new turn",
             Style::default().fg(Color::DarkGray),
         ));
-    } else {
+    } else if !app.running {
         spans.push(Span::styled(" idle", Style::default().fg(Color::DarkGray)));
     }
 
@@ -2053,6 +2101,28 @@ mod tests {
     use protocol::WorkerStatus;
     use std::time::{Duration, Instant};
 
+    #[test]
+    fn run_status_line_matches_console_metrics_and_spinner_frame() {
+        let now = Instant::now();
+        let mut app = App::new("worker".into());
+        app.run_started_at = now.checked_sub(Duration::from_millis(160));
+        app.run_requests = 1;
+        app.run_upload_tokens = 1_200;
+        app.run_output_tokens = 45;
+
+        assert_eq!(
+            line_text(&run_status_line(&app, now)),
+            "⣟ 0s ・ 1 req | ↑1.2k/↓45"
+        );
+    }
+
+    #[test]
+    fn run_elapsed_uses_console_style_units() {
+        assert_eq!(fmt_run_elapsed(9), "9s");
+        assert_eq!(fmt_run_elapsed(65), "1m 05s");
+        assert_eq!(fmt_run_elapsed(3_726), "1h 2m 06s");
+    }
+
     #[test]
     fn task_summary_right_aligns_worker_tabs_and_highlights_selection() {
         let tabs = vec![

crates/workdir/src/delegation.rs

@@ -743,6 +743,7 @@ mod tests {
                 command: command.into(),
                 timeout_secs: 5,
                 output_limit: 1024,
+                spill_dir: None,
                 tool_call_id: Some(tool_call_id.into()),
             })
             .await
@@ -770,6 +771,7 @@ mod tests {
                 command: "printf ready; sleep 0.2; printf done".into(),
                 timeout_secs: 5,
                 output_limit: 1024,
+                spill_dir: None,
                 tool_call_id: Some("tool-delegated".into()),
             })
             .await
@@ -858,6 +860,7 @@ mod tests {
                     command: "printf denied".into(),
                     timeout_secs: 5,
                     output_limit: 1024,
+                    spill_dir: None,
                     tool_call_id: Some("read-only-command".into()),
                 })
                 .await,
@@ -993,6 +996,7 @@ mod tests {
                     command: "printf revoked".into(),
                     timeout_secs: 5,
                     output_limit: 1024,
+                    spill_dir: None,
                     tool_call_id: Some("revoked-child-command".into()),
                 })
                 .await,
@@ -1171,6 +1175,7 @@ mod tests {
                     command: "printf closed".into(),
                     timeout_secs: 5,
                     output_limit: 1024,
+                    spill_dir: None,
                     tool_call_id: Some("closed-parent-command".into()),
                 })
                 .await,

crates/workdir/src/local.rs

@@ -10,9 +10,7 @@
 
 use std::collections::{BTreeMap, HashMap};
 use std::fmt::Debug;
-#[cfg(test)]
-use std::io::Write as _;
-use std::io::{Read as _, Seek as _, SeekFrom};
+use std::io::{Read as _, Seek as _, SeekFrom, Write as _};
 use std::path::{Path, PathBuf};
 use std::process::Stdio;
 use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
@@ -691,6 +689,11 @@ impl WorkdirSession for LocalWorkdirSession {
     async fn start_command(&self, request: CommandRequest) -> Result<CommandHandle, WorkdirError> {
         self.ensure_capability(WorkdirSessionCapability::Command)?;
         self.ensure_open()?;
+        if let Some(spill_dir) = request.spill_dir.as_deref()
+            && !self.inner.scope.snapshot().is_readable(spill_dir)
+        {
+            return Err(WorkdirError::OutOfScope(spill_dir.to_path_buf()));
+        }
         let id = self.inner.next_command_id.fetch_add(1, Ordering::Relaxed);
         let handle = CommandHandle(format!("command-{id}"));
         let cwd = self.inner.cwd.clone();
@@ -776,6 +779,7 @@ impl WorkdirSession for LocalWorkdirSession {
                         content: String::new(),
                         next_cursor: None,
                         truncated: false,
+                        output_path: None,
                     });
                 }
                 drop(commands);
@@ -792,6 +796,7 @@ impl WorkdirSession for LocalWorkdirSession {
                     content: String::new(),
                     next_cursor: None,
                     truncated: false,
+                    output_path: None,
                 });
             }
             break commands
@@ -901,6 +906,7 @@ fn command_output_page(output: &CommandOutput, cursor: usize, limit: usize) -> C
         content,
         next_cursor: (end < total_chars).then_some(end),
         truncated: output.truncated || end < total_chars,
+        output_path: output.output_path.clone(),
     }
 }
 
@@ -1059,6 +1065,22 @@ async fn run_command(
 
     let (content, truncated) =
         read_command_output_files(&stdout_path, &stderr_path, request.output_limit.max(1))?;
+    let output_path = match (truncated, request.spill_dir) {
+        (true, Some(spill_dir)) => {
+            let stdout_path = stdout_path.to_path_buf();
+            let stderr_path = stderr_path.to_path_buf();
+            Some(
+                tokio::task::spawn_blocking(move || {
+                    persist_command_output(&stdout_path, &stderr_path, &spill_dir)
+                })
+                .await
+                .map_err(|error| {
+                    WorkdirError::Unavailable(format!("Bash output spill task failed: {error}"))
+                })??,
+            )
+        }
+        _ => None,
+    };
     Ok(CommandOutput {
         status,
         exit_code,
@@ -1066,6 +1088,7 @@ async fn run_command(
         content,
         next_cursor: None,
         truncated,
+        output_path,
     })
 }
 
@@ -1154,6 +1177,59 @@ fn stable_utf8_prefix_len(bytes: &[u8]) -> usize {
     inspected
 }
 
+fn persist_command_output(
+    stdout_path: &Path,
+    stderr_path: &Path,
+    spill_dir: &Path,
+) -> Result<PathBuf, WorkdirError> {
+    std::fs::create_dir_all(spill_dir).map_err(|error| WorkdirError::io(spill_dir, error))?;
+    let mut artifact = tempfile::Builder::new()
+        .prefix("bash-")
+        .suffix(".log")
+        .tempfile_in(spill_dir)
+        .map_err(|error| WorkdirError::io(spill_dir, error))?;
+    let artifact_path = artifact.path().to_path_buf();
+
+    let mut stdout =
+        std::fs::File::open(stdout_path).map_err(|error| WorkdirError::io(stdout_path, error))?;
+    let stdout_len = stdout
+        .metadata()
+        .map_err(|error| WorkdirError::io(stdout_path, error))?
+        .len();
+    std::io::copy(&mut stdout, &mut artifact)
+        .map_err(|error| WorkdirError::io(&artifact_path, error))?;
+
+    let mut stderr =
+        std::fs::File::open(stderr_path).map_err(|error| WorkdirError::io(stderr_path, error))?;
+    let stderr_len = stderr
+        .metadata()
+        .map_err(|error| WorkdirError::io(stderr_path, error))?
+        .len();
+    if stdout_len > 0 && stderr_len > 0 {
+        stdout
+            .seek(SeekFrom::End(-1))
+            .map_err(|error| WorkdirError::io(stdout_path, error))?;
+        let mut last = [0_u8; 1];
+        stdout
+            .read_exact(&mut last)
+            .map_err(|error| WorkdirError::io(stdout_path, error))?;
+        if last[0] != b'\n' {
+            artifact
+                .write_all(b"\n")
+                .map_err(|error| WorkdirError::io(&artifact_path, error))?;
+        }
+    }
+    std::io::copy(&mut stderr, &mut artifact)
+        .map_err(|error| WorkdirError::io(&artifact_path, error))?;
+    artifact
+        .flush()
+        .map_err(|error| WorkdirError::io(&artifact_path, error))?;
+    artifact
+        .keep()
+        .map(|(_, path)| path)
+        .map_err(|error| WorkdirError::io(&artifact_path, error.error))
+}
+
 fn read_command_output_files(
     stdout_path: &Path,
     stderr_path: &Path,
@@ -1440,6 +1516,7 @@ mod tests {
                 command: "sleep 30".to_owned(),
                 timeout_secs: 60,
                 output_limit: 1024,
+                spill_dir: None,
                 tool_call_id: None,
             },
         )
@@ -1966,6 +2043,7 @@ mod tests {
                 command: "pwd && printf provider-command".into(),
                 timeout_secs: 5,
                 output_limit: 4096,
+                spill_dir: None,
                 tool_call_id: None,
             },
         )
@@ -1991,6 +2069,151 @@ mod tests {
         );
     }
 
+    #[tokio::test]
+    async fn explicitly_scoped_absolute_artifact_can_be_read_and_grepped() {
+        let dir = TempDir::new().unwrap();
+        let spill = TempDir::new().unwrap();
+        let artifact = spill.path().join("bash-output.log");
+        std::fs::write(&artifact, "first\nFINAL-NEEDLE\nlast\n").unwrap();
+        let scope = Scope::from_config(&ScopeConfig {
+            allow: vec![
+                ScopeRule {
+                    target: dir.path().to_path_buf(),
+                    permission: Permission::Write,
+                    recursive: true,
+                },
+                ScopeRule {
+                    target: spill.path().to_path_buf(),
+                    permission: Permission::Read,
+                    recursive: true,
+                },
+            ],
+            deny: Vec::new(),
+        })
+        .unwrap();
+        let workdir = LocalWorkdirSession::new(scope, dir.path().to_path_buf());
+        let artifact_path = WorkdirPath::new_scoped(artifact.to_string_lossy()).unwrap();
+
+        let read = WorkdirSession::read(
+            &workdir,
+            ReadRequest {
+                path: artifact_path.clone(),
+                offset: 1,
+                limit: 1,
+                max_bytes: 1024,
+            },
+        )
+        .await
+        .unwrap();
+        assert_eq!(String::from_utf8(read.bytes).unwrap(), "FINAL-NEEDLE\n");
+
+        let grep = WorkdirSession::grep(
+            &workdir,
+            GrepRequest {
+                pattern: "FINAL-NEEDLE".into(),
+                path: artifact_path,
+                glob: None,
+                file_type: None,
+                case_insensitive: false,
+                before_context: 0,
+                after_context: 0,
+                multiline: false,
+                output_mode: crate::GrepOutputMode::Content,
+                limit: 10,
+                offset: 0,
+            },
+        )
+        .await
+        .unwrap();
+        assert_eq!(grep.match_count, 1);
+        assert!(grep.output.contains("FINAL-NEEDLE"));
+    }
+
+    #[tokio::test]
+    async fn command_rejects_spill_directory_without_read_scope() {
+        let dir = TempDir::new().unwrap();
+        let spill = TempDir::new().unwrap();
+        let workdir = make_fs(&dir);
+
+        let error = WorkdirSession::start_command(
+            &workdir,
+            CommandRequest {
+                command: "printf hidden".into(),
+                timeout_secs: 5,
+                output_limit: 1,
+                spill_dir: Some(spill.path().to_path_buf()),
+                tool_call_id: None,
+            },
+        )
+        .await
+        .unwrap_err();
+
+        assert!(matches!(error, WorkdirError::OutOfScope(path) if path == spill.path()));
+    }
+
+    #[tokio::test]
+    async fn truncated_command_output_is_retained_in_the_requested_spill_directory() {
+        let dir = TempDir::new().unwrap();
+        let spill = TempDir::new().unwrap();
+        let scope = Scope::from_config(&ScopeConfig {
+            allow: vec![
+                ScopeRule {
+                    target: dir.path().to_path_buf(),
+                    permission: Permission::Write,
+                    recursive: true,
+                },
+                ScopeRule {
+                    target: spill.path().to_path_buf(),
+                    permission: Permission::Read,
+                    recursive: true,
+                },
+            ],
+            deny: Vec::new(),
+        })
+        .unwrap();
+        let workdir = LocalWorkdirSession::new(scope, dir.path().to_path_buf());
+        let handle = WorkdirSession::start_command(
+            &workdir,
+            CommandRequest {
+                command: "i=0; while [ $i -lt 200 ]; do printf 'line-%03d\\n' \"$i\"; i=$((i+1)); done; printf 'FINAL-NEEDLE\\n'".into(),
+                timeout_secs: 5,
+                output_limit: 64,
+                spill_dir: Some(spill.path().to_path_buf()),
+                tool_call_id: None,
+            },
+        )
+        .await
+        .unwrap();
+        let output = WorkdirSession::command_output(
+            &workdir,
+            CommandOutputRequest {
+                handle,
+                cursor: 0,
+                limit: 4096,
+                wait: true,
+            },
+        )
+        .await
+        .unwrap();
+
+        assert!(output.truncated);
+        let output_path = output.output_path.expect("retained output path");
+        assert_eq!(output_path.parent(), Some(spill.path()));
+        let retained = std::fs::read_to_string(&output_path).unwrap();
+        assert!(retained.starts_with("line-000\n"));
+        assert!(retained.ends_with("FINAL-NEEDLE\n"));
+        assert_eq!(retained.lines().count(), 201);
+
+        #[cfg(unix)]
+        {
+            use std::os::unix::fs::PermissionsExt as _;
+            assert_eq!(
+                std::fs::metadata(output_path).unwrap().permissions().mode() & 0o777,
+                0o600
+            );
+        }
+    }
+
     #[tokio::test]
     async fn completed_command_output_can_be_read_in_bounded_unicode_pages() {
         let dir = TempDir::new().unwrap();
@@ -2001,6 +2224,7 @@ mod tests {
                 command: "printf 'aéz'".into(),
                 timeout_secs: 5,
                 output_limit: 1024,
+                spill_dir: None,
                 tool_call_id: None,
             },
         )
@@ -2120,6 +2344,7 @@ mod tests {
                 content: "done".into(),
                 next_cursor: None,
                 truncated: false,
+                output_path: None,
             })
         });
         workdir.inner.commands.lock().await.insert(
@@ -2224,6 +2449,7 @@ mod tests {
                 command: "printf ready; printf warning >&2; sleep 0.2; printf done".into(),
                 timeout_secs: 5,
                 output_limit: 1024,
+                spill_dir: None,
                 tool_call_id: Some("tool-7".into()),
             },
         )
@@ -2327,6 +2553,7 @@ mod tests {
                 command: "sleep 30".into(),
                 timeout_secs: 1,
                 output_limit: 1024,
+                spill_dir: None,
                 tool_call_id: None,
             },
         )
@@ -2396,6 +2623,7 @@ mod tests {
                 command: "sleep 30".into(),
                 timeout_secs: 60,
                 output_limit: 1024,
+                spill_dir: None,
                 tool_call_id: None,
             },
         )

crates/workdir/src/operation.rs

@@ -1,3 +1,5 @@
+use std::path::PathBuf;
+
 use serde::{Deserialize, Serialize};
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
@@ -9,6 +11,9 @@ pub struct CommandRequest {
     pub command: String,
     pub timeout_secs: u64,
     pub output_limit: usize,
+    /// Provider-local directory where complete output is retained when the
+    /// inline result exceeds `output_limit`.
+    pub spill_dir: Option<PathBuf>,
     /// Optional caller-owned correlation id. Bash supplies its tool-call id so
     /// user-facing command telemetry can update the corresponding Console row
     /// without exposing provider/session handles.
@@ -96,4 +101,6 @@ pub struct CommandOutput {
     pub content: String,
     pub next_cursor: Option<usize>,
     pub truncated: bool,
+    /// Complete output retained by the provider when `truncated` is true.
+    pub output_path: Option<PathBuf>,
 }

crates/worker-runtime/src/http_server.rs

@@ -703,6 +703,7 @@ async fn run_workdir_session_operation(
                     content: String::new(),
                     next_cursor: Some(cursor),
                     truncated: false,
+                    output_path: None,
                 },
             };
             WorkdirSessionOperationResult::CommandOutput(output)

crates/worker-runtime/src/identity.rs

@@ -1,105 +1,9 @@
-use serde::{Deserialize, Deserializer, Serialize, Serializer, de};
+use serde::{Deserialize, Serialize};
 use sha2::{Digest, Sha256};
-use std::{fmt, str::FromStr};
-use uuid::{Uuid, Version};
 
+pub use protocol::{WorkerId, WorkerIdParseError};
 pub use workdir::workspace::RuntimeWorkerRef;
 
-/// Stable Workspace-owned Worker identity.
-///
-/// Runtime placement is deliberately not part of this value. New identities are
-/// allocated by Workspace authority before a Runtime create request is sent.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, PartialOrd, Ord)]
-pub struct WorkerId(Uuid);
-
-impl WorkerId {
-    pub fn now_v7() -> Self {
-        Self(Uuid::now_v7())
-    }
-
-    /// Converts a legacy Runtime-local numeric id into a syntactically valid
-    /// migration-only UUIDv7 value. New Worker allocation must use `now_v7`.
-    pub fn from_legacy_u64(value: u64) -> Self {
-        let mut bytes = [0_u8; 16];
-        bytes[8..].copy_from_slice(&value.to_be_bytes());
-        bytes[6] = 0x70;
-        bytes[8] = (bytes[8] & 0x3f) | 0x80;
-        Self(Uuid::from_bytes(bytes))
-    }
-
-    pub fn from_legacy_binding(workspace_id: &str, runtime_id: &str, value: u64) -> Self {
-        let mut hasher = Sha256::new();
-        hasher.update(b"yoi.workspace-worker-id.v1\0");
-        hasher.update(workspace_id.as_bytes());
-        hasher.update([0]);
-        hasher.update(runtime_id.as_bytes());
-        hasher.update([0]);
-        hasher.update(value.to_be_bytes());
-        let digest = hasher.finalize();
-        let mut bytes = [0_u8; 16];
-        bytes.copy_from_slice(&digest[..16]);
-        // Migrated ids sort before normally allocated UUIDv7 values while retaining
-        // deterministic collision-resistant payload bits.
-        bytes[..6].fill(0);
-        bytes[6] = (bytes[6] & 0x0f) | 0x70;
-        bytes[8] = (bytes[8] & 0x3f) | 0x80;
-        Self(Uuid::from_bytes(bytes))
-    }
-
-    pub fn parse(value: &str) -> Option<Self> {
-        let value = Uuid::parse_str(value).ok()?;
-        (value.get_version() == Some(Version::SortRand)).then_some(Self(value))
-    }
-
-    pub const fn as_uuid(self) -> Uuid {
-        self.0
-    }
-}
-
-impl fmt::Display for WorkerId {
-    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
-        self.0.fmt(formatter)
-    }
-}
-
-impl FromStr for WorkerId {
-    type Err = WorkerIdParseError;
-
-    fn from_str(value: &str) -> Result<Self, Self::Err> {
-        Self::parse(value).ok_or(WorkerIdParseError)
-    }
-}
-
-impl Serialize for WorkerId {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: Serializer,
-    {
-        serializer.serialize_str(&self.to_string())
-    }
-}
-
-impl<'de> Deserialize<'de> for WorkerId {
-    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
-    where
-        D: Deserializer<'de>,
-    {
-        let value = String::deserialize(deserializer)?;
-        Self::parse(&value).ok_or_else(|| de::Error::custom("Worker id must be a UUIDv7"))
-    }
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub struct WorkerIdParseError;
-
-impl fmt::Display for WorkerIdParseError {
-    fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result {
-        formatter.write_str("Worker id must be a UUIDv7")
-    }
-}
-
-impl std::error::Error for WorkerIdParseError {}
-
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct LegacyWorkerIdentityMapping {
     pub workspace_id: String,
@@ -140,7 +44,7 @@ pub fn legacy_worker_identity_mapping_digest(mappings: &[LegacyWorkerIdentityMap
 }
 
 /// Runtime-local authority reference for Worker operations. The contained id is
-/// nevertheless the Workspace-owned stable identity; the Runtime does not mint it.
+/// nevertheless the stable Worker identity; the Runtime does not mint it.
 #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
 pub struct WorkerRef {
     pub worker_id: WorkerId,
@@ -164,14 +68,6 @@ impl TryFrom<&RuntimeWorkerRef> for WorkerRef {
 mod tests {
     use super::*;
 
-    #[test]
-    fn worker_id_accepts_only_uuid_v7() {
-        let worker_id = WorkerId::now_v7();
-        assert_eq!(WorkerId::parse(&worker_id.to_string()), Some(worker_id));
-        assert!(WorkerId::parse("30").is_none());
-        assert!(WorkerId::parse(&Uuid::nil().to_string()).is_none());
-    }
-
     #[test]
     fn runtime_worker_ref_preserves_stable_worker_identity() {
         let worker_id = WorkerId::now_v7();

crates/worker-runtime/src/worker_backend.rs

@@ -60,6 +60,7 @@ use worker::{
     Worker, WorkerBootstrap, WorkerBootstrapError, WorkerBootstrapLayout,
     WorkerControllerTransport, WorkerError, WorkerFilesystemAuthority, WorkerHandle,
     WorkerSharedState, WorkerWorkspaceContext, WorkspaceClient, WorkspaceId,
+    bash_output_dir_for_worker_id,
 };
 
 const DEFAULT_BACKEND_ID: &str = "worker-crate";
@@ -886,6 +887,7 @@ impl RuntimeWorkerFactory for ProfileRuntimeWorkerFactory {
         let run_dir = worker_aggregate_dir
             .join("runs")
             .join(request.run_generation.to_string());
+        let bash_output_dir = bash_output_dir_for_worker_id(&request.worker_ref.worker_id);
         let mut prepared = WorkerBootstrap::new(
             manifest,
             store,
@@ -894,6 +896,7 @@ impl RuntimeWorkerFactory for ProfileRuntimeWorkerFactory {
             filesystem_authority,
             WorkerBootstrapLayout::RuntimeManagedRun {
                 run_dir: run_dir.clone(),
+                bash_output_dir,
             },
             self.controller_transport,
         )
@@ -1131,10 +1134,12 @@ impl RuntimeWorkerFactory for ProfileRuntimeWorkerFactory {
         let run_dir = worker_aggregate_dir
             .join("runs")
             .join(request.run_generation.to_string());
+        let bash_output_dir = bash_output_dir_for_worker_id(&request.worker_ref.worker_id);
         let started = PreparedWorker::new(
             worker,
             WorkerBootstrapLayout::RuntimeManagedRun {
                 run_dir: run_dir.clone(),
+                bash_output_dir,
             },
             self.controller_transport,
         )
@@ -2552,10 +2557,14 @@ mod tests {
             )
             .await
             .map_err(|err| err.to_string())?;
-            let (handle, shutdown_rx) =
-                WorkerController::spawn_runtime_managed(worker, &self.runtime_base)
-                    .await
-                    .map_err(|err| err.to_string())?;
+            let bash_output_dir = self.runtime_base.join("bash-output");
+            let (handle, shutdown_rx) = WorkerController::spawn_runtime_managed(
+                worker,
+                &self.runtime_base,
+                &bash_output_dir,
+            )
+            .await
+            .map_err(|err| err.to_string())?;
             Ok(RuntimeWorkerController {
                 handle,
                 shutdown: Arc::new(tokio::sync::Mutex::new(Some(shutdown_rx))),

crates/worker/examples/worker_protocol.rs

@@ -47,7 +47,9 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     let worker = worker::Worker::from_manifest_toml(&toml, store).await?;
 
     let runtime_tmp = tempfile::tempdir()?;
-    let (handle, _shutdown_rx) = WorkerController::spawn(worker, runtime_tmp.path()).await?;
+    let bash_output_dir = runtime_tmp.path().join("bash-output");
+    let (handle, _shutdown_rx) =
+        WorkerController::spawn(worker, runtime_tmp.path(), &bash_output_dir).await?;
 
     // Check initial status via shared state
     println!("[shared_state] {}", handle.shared_state.status_json());

crates/worker/src/bootstrap.rs

@@ -17,9 +17,28 @@ use manifest::WorkerManifest;
 #[derive(Debug, Clone)]
 pub enum WorkerBootstrapLayout {
     /// A direct Worker rooted below the supplied runtime base directory.
-    Direct { runtime_base: PathBuf },
+    Direct {
+        runtime_base: PathBuf,
+        bash_output_dir: PathBuf,
+    },
     /// A runtime-managed Worker with an exact persisted run directory.
-    RuntimeManagedRun { run_dir: PathBuf },
+    RuntimeManagedRun {
+        run_dir: PathBuf,
+        bash_output_dir: PathBuf,
+    },
+}
+
+/// Return the temporary Bash spill directory owned by a stable Worker identity.
+///
+/// The directory deliberately lives outside session/run-generation storage so a
+/// restarted controller for the same Worker keeps the same readable artifact
+/// boundary.
+pub fn bash_output_dir_for_worker_id(worker_id: impl std::fmt::Display) -> PathBuf {
+    std::env::temp_dir()
+        .join("yoi")
+        .join("workers")
+        .join(worker_id.to_string())
+        .join("bash-output")
 }
 
 /// Construction and controller inputs that are stable for one Worker launch.
@@ -204,12 +223,29 @@ where
 {
     let cleanup_session = worker.workdir_session().cloned();
     let controller = match layout {
-        WorkerBootstrapLayout::Direct { runtime_base } => {
-            WorkerController::spawn_with_transport(worker, &runtime_base, transport).await
+        WorkerBootstrapLayout::Direct {
+            runtime_base,
+            bash_output_dir,
+        } => {
+            WorkerController::spawn_with_transport(
+                worker,
+                &runtime_base,
+                &bash_output_dir,
+                transport,
+            )
+            .await
         }
-        WorkerBootstrapLayout::RuntimeManagedRun { run_dir } => {
-            WorkerController::spawn_runtime_managed_run_with_transport(worker, &run_dir, transport)
-                .await
+        WorkerBootstrapLayout::RuntimeManagedRun {
+            run_dir,
+            bash_output_dir,
+        } => {
+            WorkerController::spawn_runtime_managed_run_with_transport(
+                worker,
+                &run_dir,
+                &bash_output_dir,
+                transport,
+            )
+            .await
         }
     };
 
@@ -227,3 +263,22 @@ where
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::bash_output_dir_for_worker_id;
+
+    #[test]
+    fn bash_output_directory_is_stable_per_worker_below_system_temp() {
+        let path = bash_output_dir_for_worker_id("019c1234-worker");
+
+        assert_eq!(
+            path,
+            std::env::temp_dir()
+                .join("yoi")
+                .join("workers")
+                .join("019c1234-worker")
+                .join("bash-output")
+        );
+    }
+}

crates/worker/src/controller.rs

@@ -45,12 +45,12 @@ use workdir::{
 #[derive(Clone)]
 pub struct WorkerHandle {
     method_tx: mpsc::Sender<Method>,
-    event_tx: broadcast::Sender<Event>,
+    working_event_tx: broadcast::Sender<Event>,
     pub shared_state: Arc<WorkerSharedState>,
     pub runtime_dir: Arc<RuntimeDir>,
     pub alerter: Alerter,
     pub in_flight: InFlightEvents,
-    /// Segment-log mirror + broadcast handle. The IPC server snapshots
+    /// Segment-log mirror + session-entry channel. The IPC server snapshots
     /// it on every new connection (Event::Snapshot) and forwards
     /// subsequent commits (Event::Entry) on the receiver.
     pub sink: SegmentLogSink,
@@ -63,7 +63,7 @@ impl WorkerHandle {
     }
 
     pub fn subscribe(&self) -> broadcast::Receiver<Event> {
-        self.event_tx.subscribe()
+        self.working_event_tx.subscribe()
     }
 
     pub fn committed_entries(&self) -> Vec<LogEntry> {
@@ -117,7 +117,7 @@ impl WorkerHandle {
 
     /// Broadcast an event to all listeners (including socket clients).
     pub fn send_event(&self, event: Event) -> Result<usize, broadcast::error::SendError<Event>> {
-        self.event_tx.send(event)
+        self.working_event_tx.send(event)
     }
 
     /// Emit a user-facing alert. Thin wrapper over `Alerter::alert`.
@@ -129,19 +129,19 @@ impl WorkerHandle {
 async fn set_controller_status(
     shared_state: &Arc<WorkerSharedState>,
     runtime_dir: &RuntimeDir,
-    event_tx: &broadcast::Sender<Event>,
+    working_event_tx: &broadcast::Sender<Event>,
     status: WorkerStatus,
 ) {
     shared_state.set_status(status);
     let _ = runtime_dir.write_status(shared_state).await;
-    let _ = event_tx.send(Event::Status { status });
+    let _ = working_event_tx.send(Event::Status { status });
 }
 
 async fn finish_controller_run<C, St>(
     worker: &mut Worker<C, St>,
     shared_state: &Arc<WorkerSharedState>,
     runtime_dir: &RuntimeDir,
-    event_tx: &broadcast::Sender<Event>,
+    working_event_tx: &broadcast::Sender<Event>,
     new_status: WorkerStatus,
 ) where
     C: LlmClient + Clone + 'static,
@@ -157,7 +157,7 @@ async fn finish_controller_run<C, St>(
     // the terminal run boundary so reconnect snapshots cannot append stale
     // partial text/tool arguments after newer entries.
     worker.clear_in_flight_events();
-    set_controller_status(shared_state, runtime_dir, event_tx, new_status).await;
+    set_controller_status(shared_state, runtime_dir, working_event_tx, new_status).await;
     worker.spawn_post_run_memory_jobs();
 }
 
@@ -222,6 +222,7 @@ impl WorkerController {
     pub async fn spawn<C, St>(
         worker: Worker<C, St>,
         runtime_base: &Path,
+        bash_output_dir: &Path,
     ) -> Result<(WorkerHandle, ShutdownReceiver), std::io::Error>
     where
         C: LlmClient + Clone + 'static,
@@ -230,6 +231,7 @@ impl WorkerController {
         Self::spawn_inner(
             worker,
             runtime_base,
+            bash_output_dir,
             false,
             None,
             WorkerControllerTransport::UnixSocket,
@@ -242,24 +244,9 @@ impl WorkerController {
     pub async fn spawn_with_transport<C, St>(
         worker: Worker<C, St>,
         runtime_base: &Path,
+        bash_output_dir: &Path,
         transport: WorkerControllerTransport,
     ) -> Result<(WorkerHandle, ShutdownReceiver), std::io::Error>
-    where
-        C: LlmClient + Clone + 'static,
-        St: Store + WorkerMetadataStore + Clone + Send + Sync + 'static,
-    {
-        Self::spawn_inner(worker, runtime_base, false, None, transport).await
-    }
-
-    /// Spawn a Worker owned by `worker-runtime`.
-    ///
-    /// The controller still uses an ephemeral directory for Unix sockets and
-    /// tool spill artifacts, but does not write legacy pid/status/manifest
-    /// liveness projections.
-    pub async fn spawn_runtime_managed<C, St>(
-        worker: Worker<C, St>,
-        runtime_base: &Path,
-    ) -> Result<(WorkerHandle, ShutdownReceiver), std::io::Error>
     where
         C: LlmClient + Clone + 'static,
         St: Store + WorkerMetadataStore + Clone + Send + Sync + 'static,
@@ -267,6 +254,33 @@ impl WorkerController {
         Self::spawn_inner(
             worker,
             runtime_base,
+            bash_output_dir,
+            false,
+            None,
+            transport,
+        )
+        .await
+    }
+
+    /// Spawn a Worker owned by `worker-runtime`.
+    ///
+    /// The controller uses an ephemeral directory for Unix sockets while tool
+    /// spill artifacts use the separately supplied Worker-owned temporary path.
+    /// Runtime-managed Workers do not write legacy pid/status/manifest liveness
+    /// projections.
+    pub async fn spawn_runtime_managed<C, St>(
+        worker: Worker<C, St>,
+        runtime_base: &Path,
+        bash_output_dir: &Path,
+    ) -> Result<(WorkerHandle, ShutdownReceiver), std::io::Error>
+    where
+        C: LlmClient + Clone + 'static,
+        St: Store + WorkerMetadataStore + Clone + Send + Sync + 'static,
+    {
+        Self::spawn_inner(
+            worker,
+            runtime_base,
+            bash_output_dir,
             true,
             None,
             WorkerControllerTransport::UnixSocket,
@@ -278,6 +292,7 @@ impl WorkerController {
     pub async fn spawn_runtime_managed_run<C, St>(
         worker: Worker<C, St>,
         run_dir: &Path,
+        bash_output_dir: &Path,
     ) -> Result<(WorkerHandle, ShutdownReceiver), std::io::Error>
     where
         C: LlmClient + Clone + 'static,
@@ -286,6 +301,7 @@ impl WorkerController {
         Self::spawn_runtime_managed_run_with_transport(
             worker,
             run_dir,
+            bash_output_dir,
             WorkerControllerTransport::UnixSocket,
         )
         .await
@@ -296,6 +312,7 @@ impl WorkerController {
     pub async fn spawn_runtime_managed_run_with_transport<C, St>(
         worker: Worker<C, St>,
         run_dir: &Path,
+        bash_output_dir: &Path,
         transport: WorkerControllerTransport,
     ) -> Result<(WorkerHandle, ShutdownReceiver), std::io::Error>
     where
@@ -305,12 +322,21 @@ impl WorkerController {
         let parent = run_dir
             .parent()
             .ok_or_else(|| std::io::Error::other("run path has no parent"))?;
-        Self::spawn_inner(worker, parent, true, Some(run_dir), transport).await
+        Self::spawn_inner(
+            worker,
+            parent,
+            bash_output_dir,
+            true,
+            Some(run_dir),
+            transport,
+        )
+        .await
     }
 
     async fn spawn_inner<C, St>(
         worker: Worker<C, St>,
         runtime_base: &Path,
+        bash_output_dir: &Path,
         runtime_managed: bool,
         runtime_run: Option<&Path>,
         transport: WorkerControllerTransport,
@@ -323,6 +349,7 @@ impl WorkerController {
         let result = Self::spawn_initialized(
             worker,
             runtime_base,
+            bash_output_dir,
             runtime_managed,
             runtime_run,
             transport,
@@ -340,6 +367,7 @@ impl WorkerController {
     async fn spawn_initialized<C, St>(
         mut worker: Worker<C, St>,
         runtime_base: &Path,
+        bash_output_dir: &Path,
         runtime_managed: bool,
         runtime_run: Option<&Path>,
         transport: WorkerControllerTransport,
@@ -353,9 +381,9 @@ impl WorkerController {
         //         bash-output scope) ===
         let (shutdown_tx, shutdown_rx) = oneshot::channel::<()>();
         let (method_tx, method_rx) = mpsc::channel::<Method>(32);
-        let (event_tx, _) = broadcast::channel::<Event>(256);
-        let alerter = Alerter::new(event_tx.clone());
-        let in_flight = InFlightEvents::new(event_tx.clone());
+        let (working_event_tx, _) = broadcast::channel::<Event>(256);
+        let alerter = Alerter::new(working_event_tx.clone());
+        let in_flight = InFlightEvents::new(working_event_tx.clone());
         worker.attach_in_flight_events(in_flight.clone());
 
         // Runtime directory is created before tool registration because it owns
@@ -395,13 +423,13 @@ impl WorkerController {
         // Also hand the raw broadcast sender so Worker-internal operations
         // can emit typed lifecycle `Event`s (currently: compact progress).
         worker.attach_internal_worker_registry(spawned_registry.clone());
-        worker.attach_event_tx(event_tx.clone());
+        worker.attach_working_event_tx(working_event_tx.clone());
 
-        // Bash spills long outputs to a per-worker subdir under the runtime
-        // dir. Push a recursive `allow(Read)` for that path into the
-        // Worker's runtime scope so the agent can `Read` saved files
-        // without polluting the workspace.
-        let bash_output_dir = runtime_dir.path().join("bash-output");
+        // Bash spill artifacts are owned by the stable Worker identity rather
+        // than a controller session/run generation. Push a recursive
+        // `allow(Read)` for the exact tool output path into the Worker's shared
+        // runtime scope so the Workdir session and system prompt stay aligned.
+        let bash_output_dir = bash_output_dir.to_path_buf();
         std::fs::create_dir_all(&bash_output_dir).map_err(|e| {
             std::io::Error::other(format!(
                 "create bash output dir {}: {e}",
@@ -430,7 +458,7 @@ impl WorkerController {
         worker.wire_history_persistence();
 
         // === 2. Engine event bridge wiring ===
-        wire_event_bridges_on_engine(&mut worker, &event_tx, &alerter, &in_flight);
+        wire_event_bridges_on_engine(&mut worker, &working_event_tx, &alerter, &in_flight);
 
         // === 3. Tool registration (builtin / memory / spawn-orchestration) ===
         let fs_for_view = register_worker_tools(
@@ -477,7 +505,7 @@ impl WorkerController {
 
         let handle = WorkerHandle {
             method_tx,
-            event_tx: event_tx.clone(),
+            working_event_tx: working_event_tx.clone(),
             shared_state: shared_state.clone(),
             runtime_dir: runtime_dir.clone(),
             alerter: alerter.clone(),
@@ -502,7 +530,7 @@ impl WorkerController {
         tokio::spawn(controller_loop(
             worker,
             method_rx,
-            event_tx,
+            working_event_tx,
             shared_state,
             runtime_dir,
             cancel_tx,
@@ -640,7 +668,7 @@ fn protocol_command_status(status: WorkdirCommandStatus) -> ProtocolCommandStatu
 }
 
 /// Wire the per-event broadcast bridges on the Worker's Engine. Each callback
-/// re-publishes a worker-level signal as a `protocol::Event` on `event_tx`
+/// re-publishes a worker-level signal as a `protocol::Event` on `working_event_tx`
 /// so subscribers (TUI, socket clients) get a single typed stream.
 ///
 /// `Worker::wire_history_persistence` is called separately to wire the
@@ -649,7 +677,7 @@ fn protocol_command_status(status: WorkdirCommandStatus) -> ProtocolCommandStatu
 /// / `AnnotatedToolResult` commit through the sync writer.
 pub(crate) fn wire_event_bridges_on_engine<C, St>(
     worker: &mut Worker<C, St>,
-    event_tx: &broadcast::Sender<Event>,
+    working_event_tx: &broadcast::Sender<Event>,
     alerter: &Alerter,
     in_flight: &InFlightEvents,
 ) where
@@ -659,12 +687,12 @@ pub(crate) fn wire_event_bridges_on_engine<C, St>(
     let ai_activity = worker.ai_activity_counter();
     let worker = worker.engine_mut();
 
-    let tx = event_tx.clone();
+    let tx = working_event_tx.clone();
     worker.on_turn_start(move |turn| {
         let _ = tx.send(Event::TurnStart { turn });
     });
 
-    let tx = event_tx.clone();
+    let tx = working_event_tx.clone();
     worker.on_turn_end(move |turn| {
         let _ = tx.send(Event::TurnEnd {
             turn,
@@ -672,17 +700,17 @@ pub(crate) fn wire_event_bridges_on_engine<C, St>(
         });
     });
 
-    let tx = event_tx.clone();
+    let tx = working_event_tx.clone();
     worker.on_llm_call_start(move |llm_call| {
         let _ = tx.send(Event::LlmCallStart { llm_call });
     });
 
-    let tx = event_tx.clone();
+    let tx = working_event_tx.clone();
     worker.on_llm_call_end(move |llm_call| {
         let _ = tx.send(Event::LlmCallEnd { llm_call });
     });
 
-    let tx = event_tx.clone();
+    let tx = working_event_tx.clone();
     worker.on_llm_retry(move |llm_call, notice| {
         let _ = tx.send(Event::LlmRetry {
             llm_call,
@@ -695,7 +723,7 @@ pub(crate) fn wire_event_bridges_on_engine<C, St>(
         });
     });
 
-    let tx = event_tx.clone();
+    let tx = working_event_tx.clone();
     worker.on_llm_continuation(move |llm_call, attempt, max_attempts, reason| {
         let _ = tx.send(Event::LlmContinuation {
             llm_call,
@@ -768,7 +796,7 @@ pub(crate) fn wire_event_bridges_on_engine<C, St>(
         });
     });
 
-    let tx = event_tx.clone();
+    let tx = working_event_tx.clone();
     let activity = ai_activity.clone();
     worker.on_tool_result(move |result| {
         activity.fetch_add(1, Ordering::SeqCst);
@@ -793,7 +821,7 @@ pub(crate) fn wire_event_bridges_on_engine<C, St>(
         });
     });
 
-    let tx = event_tx.clone();
+    let tx = working_event_tx.clone();
     worker.on_usage(move |event| {
         let _ = tx.send(Event::Usage {
             input_tokens: event.input_tokens,
@@ -802,7 +830,7 @@ pub(crate) fn wire_event_bridges_on_engine<C, St>(
         });
     });
 
-    let tx = event_tx.clone();
+    let tx = working_event_tx.clone();
     worker.on_error(move |event| {
         let _ = tx.send(Event::Error {
             code: ErrorCode::ProviderError,
@@ -880,7 +908,7 @@ where
             .register_tools(tools::core_builtin_tools(
                 workdir.clone(),
                 tracker.clone(),
-                bash_output_dir,
+                bash_output_dir.clone(),
             ));
         if feature_config.image.enabled && model_supports_image_attachments(&spawner_manifest.model)
         {
@@ -1103,6 +1131,7 @@ where
                 spawner_workspace_context,
                 parent_notifications,
                 runtime_base.clone(),
+                bash_output_dir.clone(),
                 spawner_workspace_root,
                 source_workdir_session,
                 spawned_registry.clone(),
@@ -1156,7 +1185,7 @@ where
 async fn controller_loop<C, St>(
     mut worker: Worker<C, St>,
     mut method_rx: mpsc::Receiver<Method>,
-    event_tx: broadcast::Sender<Event>,
+    working_event_tx: broadcast::Sender<Event>,
     shared_state: Arc<WorkerSharedState>,
     runtime_dir: Arc<RuntimeDir>,
     cancel_tx: mpsc::Sender<()>,
@@ -1213,7 +1242,7 @@ async fn controller_loop<C, St>(
                 set_controller_status(
                     &shared_state,
                     &runtime_dir,
-                    &event_tx,
+                    &working_event_tx,
                     WorkerStatus::Running,
                 )
                 .await;
@@ -1230,7 +1259,7 @@ async fn controller_loop<C, St>(
                             },
                         ),
                         &mut method_rx,
-                        &event_tx,
+                        &working_event_tx,
                         &cancel_tx,
                         &pause_tx,
                         &shared_state,
@@ -1255,7 +1284,7 @@ async fn controller_loop<C, St>(
                             },
                         ),
                         &mut method_rx,
-                        &event_tx,
+                        &working_event_tx,
                         &cancel_tx,
                         &pause_tx,
                         &shared_state,
@@ -1273,7 +1302,7 @@ async fn controller_loop<C, St>(
                     drive_turn(
                         worker.run_for_notification(kind),
                         &mut method_rx,
-                        &event_tx,
+                        &working_event_tx,
                         &cancel_tx,
                         &pause_tx,
                         &shared_state,
@@ -1291,7 +1320,7 @@ async fn controller_loop<C, St>(
                     drive_turn(
                         worker.resume(),
                         &mut method_rx,
-                        &event_tx,
+                        &working_event_tx,
                         &cancel_tx,
                         &pause_tx,
                         &shared_state,
@@ -1315,16 +1344,16 @@ async fn controller_loop<C, St>(
                 &mut worker,
                 &shared_state,
                 &runtime_dir,
-                &event_tx,
+                &working_event_tx,
                 new_status,
             )
             .await;
             if shutdown {
-                let _ = event_tx.send(Event::Shutdown);
+                let _ = working_event_tx.send(Event::Shutdown);
                 break;
             }
             if take_shutdown_request_after_status(&shutdown_after_idle, new_status) {
-                let _ = event_tx.send(Event::Shutdown);
+                let _ = working_event_tx.send(Event::Shutdown);
                 break;
             }
             continue;
@@ -1342,7 +1371,7 @@ async fn controller_loop<C, St>(
                     // already rejects `Run` while a turn is live, so
                     // this branch is only reachable across a race window
                     // around status flips.
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::AlreadyRunning,
                         message: "Worker is already executing a turn".into(),
                     });
@@ -1393,7 +1422,7 @@ async fn controller_loop<C, St>(
 
             Method::Resume => {
                 if shared_state.get_status() != WorkerStatus::Paused {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::NotPaused,
                         message: "Worker is not paused".into(),
                     });
@@ -1409,20 +1438,20 @@ async fn controller_loop<C, St>(
                         set_controller_status(
                             &shared_state,
                             &runtime_dir,
-                            &event_tx,
+                            &working_event_tx,
                             WorkerStatus::Idle,
                         )
                         .await;
                     }
                     Err(error) => {
-                        let _ = event_tx.send(Event::Error {
+                        let _ = working_event_tx.send(Event::Error {
                             code: worker_error_code(&error),
                             message: error.to_string(),
                         });
                     }
                 },
                 WorkerStatus::Idle | WorkerStatus::Stopped => {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::NotRunning,
                         message: "Worker is not running".into(),
                     });
@@ -1439,7 +1468,7 @@ async fn controller_loop<C, St>(
                 // Worker is Idle (Running turns go through `drive_turn`,
                 // not this outer match), so there is nothing to pause.
                 if shared_state.get_status() != WorkerStatus::Paused {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::NotRunning,
                         message: "Worker is not running".into(),
                     });
@@ -1449,21 +1478,21 @@ async fn controller_loop<C, St>(
             Method::Compact => match shared_state.get_status() {
                 WorkerStatus::Idle => {
                     if let Err(error) = worker.manual_compact().await {
-                        let _ = event_tx.send(Event::Error {
+                        let _ = working_event_tx.send(Event::Error {
                             code: worker_error_code(&error),
                             message: error.to_string(),
                         });
                     }
                 }
                 WorkerStatus::Paused => {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::InvalidRequest,
                         message: "Cannot compact while the Worker is paused; resume or start a fresh turn first"
                             .into(),
                     });
                 }
                 WorkerStatus::Running | WorkerStatus::Stopped => {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::AlreadyRunning,
                         message:
                             "Worker is already executing a turn; compact can only run while idle"
@@ -1474,10 +1503,10 @@ async fn controller_loop<C, St>(
 
             Method::ListRewindTargets => match shared_state.get_status() {
                 WorkerStatus::Idle | WorkerStatus::Paused => {
-                    emit_rewind_targets(&worker, &event_tx)
+                    emit_rewind_targets(&worker, &working_event_tx)
                 }
                 WorkerStatus::Running | WorkerStatus::Stopped => {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::AlreadyRunning,
                         message: "Worker is already executing a turn; rewind can only run while idle or paused"
                             .into(),
@@ -1490,23 +1519,28 @@ async fn controller_loop<C, St>(
                 expected_head_entries,
             } => match shared_state.get_status() {
                 WorkerStatus::Idle => {
-                    if apply_rewind(&mut worker, &event_tx, target, expected_head_entries) {
+                    if apply_rewind(
+                        &mut worker,
+                        &working_event_tx,
+                        target,
+                        expected_head_entries,
+                    ) {
                         worker.clear_in_flight_events();
                         shared_state.set_status(WorkerStatus::Idle);
-                        let _ = event_tx.send(Event::Status {
+                        let _ = working_event_tx.send(Event::Status {
                             status: WorkerStatus::Idle,
                         });
                     }
                 }
                 WorkerStatus::Paused => {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::InvalidRequest,
                         message: "Cannot apply rewind while the Worker is paused; resume or wait for idle first"
                             .into(),
                     });
                 }
                 WorkerStatus::Running | WorkerStatus::Stopped => {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::AlreadyRunning,
                         message: "Worker is already executing a turn; rewind can only run while idle or paused"
                             .into(),
@@ -1515,24 +1549,24 @@ async fn controller_loop<C, St>(
             },
 
             Method::Shutdown => {
-                let _ = event_tx.send(Event::Shutdown);
+                let _ = working_event_tx.send(Event::Shutdown);
                 break;
             }
 
             Method::ListWorkers => match discovery.list_visible().await {
                 Ok(workers) => match serde_json::to_value(workers) {
                     Ok(workers) => {
-                        let _ = event_tx.send(Event::WorkersListed { workers });
+                        let _ = working_event_tx.send(Event::WorkersListed { workers });
                     }
                     Err(error) => {
-                        let _ = event_tx.send(Event::Error {
+                        let _ = working_event_tx.send(Event::Error {
                             code: ErrorCode::Internal,
                             message: format!("serialize visible workers: {error}"),
                         });
                     }
                 },
                 Err(error) => {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::InvalidRequest,
                         message: error.to_string(),
                     });
@@ -1542,17 +1576,17 @@ async fn controller_loop<C, St>(
             Method::RestoreWorker { name } => match discovery.restore(&name).await {
                 Ok(result) => match serde_json::to_value(result) {
                     Ok(result) => {
-                        let _ = event_tx.send(Event::WorkerRestored { result });
+                        let _ = working_event_tx.send(Event::WorkerRestored { result });
                     }
                     Err(error) => {
-                        let _ = event_tx.send(Event::Error {
+                        let _ = working_event_tx.send(Event::Error {
                             code: ErrorCode::Internal,
                             message: format!("serialize worker restore result: {error}"),
                         });
                     }
                 },
                 Err(error) => {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::InvalidRequest,
                         message: error.to_string(),
                     });
@@ -1562,17 +1596,17 @@ async fn controller_loop<C, St>(
             Method::RegisterPeer { name } => match discovery.register_peer(&name) {
                 Ok(result) => match serde_json::to_value(result) {
                     Ok(result) => {
-                        let _ = event_tx.send(Event::PeerRegistered { result });
+                        let _ = working_event_tx.send(Event::PeerRegistered { result });
                     }
                     Err(error) => {
-                        let _ = event_tx.send(Event::Error {
+                        let _ = working_event_tx.send(Event::Error {
                             code: ErrorCode::Internal,
                             message: format!("serialize peer registration result: {error}"),
                         });
                     }
                 },
                 Err(error) => {
-                    let _ = event_tx.send(Event::Error {
+                    let _ = working_event_tx.send(Event::Error {
                         code: ErrorCode::InvalidRequest,
                         message: error.to_string(),
                     });
@@ -1691,7 +1725,7 @@ async fn handle_inbound_worker_event(
 async fn drive_turn<F>(
     worker_future: F,
     method_rx: &mut mpsc::Receiver<Method>,
-    event_tx: &broadcast::Sender<Event>,
+    working_event_tx: &broadcast::Sender<Event>,
     cancel_tx: &mpsc::Sender<()>,
     pause_tx: &mpsc::Sender<()>,
     shared_state: &Arc<WorkerSharedState>,
@@ -1727,7 +1761,7 @@ where
                     set_controller_status(
                         shared_state,
                         runtime_dir,
-                        event_tx,
+                        working_event_tx,
                         WorkerStatus::Running,
                     )
                     .await;
@@ -1745,11 +1779,11 @@ where
                             WorkerRunResult::LimitReached => (WorkerStatus::Idle, RunResult::LimitReached),
                             WorkerRunResult::RolledBack => (WorkerStatus::Idle, RunResult::RolledBack),
                             WorkerRunResult::Interrupted { .. } if pause_requested => {
-                                let _ = event_tx.send(Event::RunEnd { result: RunResult::Paused });
+                                let _ = working_event_tx.send(Event::RunEnd { result: RunResult::Paused });
                                 return (WorkerStatus::Paused, shutdown_requested);
                             }
                             WorkerRunResult::Interrupted { code, message } => {
-                                let _ = event_tx.send(Event::Error {
+                                let _ = working_event_tx.send(Event::Error {
                                     code,
                                     message: message.clone(),
                                 });
@@ -1765,7 +1799,7 @@ where
                                 return (WorkerStatus::Idle, shutdown_requested);
                             }
                         };
-                        let _ = event_tx.send(Event::RunEnd { result: run_result });
+                        let _ = working_event_tx.send(Event::RunEnd { result: run_result });
                         if parent_originated && matches!(run_result, RunResult::Finished) {
                             crate::ipc::event::fire_and_forget(
                                 parent_socket.cloned(),
@@ -1782,13 +1816,13 @@ where
                         // intentionally skip `WorkerEvent::Errored` upward:
                         // that channel is reserved for worker runtime
                         // failures, not deliberate interruptions.
-                        let _ = event_tx.send(Event::RunEnd { result: RunResult::Paused });
+                        let _ = working_event_tx.send(Event::RunEnd { result: RunResult::Paused });
                         (WorkerStatus::Paused, shutdown_requested)
                     }
                     Err(e) => {
                         let code = worker_error_code(&e);
                         let message = e.to_string();
-                        let _ = event_tx.send(Event::Error {
+                        let _ = working_event_tx.send(Event::Error {
                             code,
                             message: message.clone(),
                         });
@@ -1819,13 +1853,13 @@ where
                         let _ = cancel_tx.try_send(());
                     }
                     Some(Method::Run { .. } | Method::RunTracked { .. } | Method::Resume) => {
-                        let _ = event_tx.send(Event::Error {
+                        let _ = working_event_tx.send(Event::Error {
                             code: ErrorCode::AlreadyRunning,
                             message: "Worker is already executing a turn".into(),
                         });
                     }
                     Some(Method::Compact | Method::ListRewindTargets | Method::RewindTo { .. }) => {
-                        let _ = event_tx.send(Event::Error {
+                        let _ = working_event_tx.send(Event::Error {
                             code: ErrorCode::AlreadyRunning,
                             message: "Worker is already executing a turn; rewind/compact can only run while idle or paused"
                                 .into(),
@@ -1839,7 +1873,7 @@ where
                     }
                     Some(Method::ListCompletions { .. }) => {}
                     Some(Method::ListWorkers | Method::RestoreWorker { .. } | Method::RegisterPeer { .. }) => {
-                        let _ = event_tx.send(Event::Error {
+                        let _ = working_event_tx.send(Event::Error {
                             code: ErrorCode::AlreadyRunning,
                             message: "Worker discovery/control requests are only handled while the Worker is idle or paused"
                                 .into(),
@@ -1872,20 +1906,20 @@ where
     }
 }
 
-fn emit_rewind_targets<C, St>(worker: &Worker<C, St>, event_tx: &broadcast::Sender<Event>)
+fn emit_rewind_targets<C, St>(worker: &Worker<C, St>, working_event_tx: &broadcast::Sender<Event>)
 where
     C: LlmClient + 'static,
     St: Store,
 {
     match worker.list_rewind_targets() {
         Ok((head_entries, targets)) => {
-            let _ = event_tx.send(Event::RewindTargets {
+            let _ = working_event_tx.send(Event::RewindTargets {
                 head_entries,
                 targets,
             });
         }
         Err(err) => {
-            let _ = event_tx.send(Event::Error {
+            let _ = working_event_tx.send(Event::Error {
                 code: ErrorCode::Internal,
                 message: err.to_string(),
             });
@@ -1895,7 +1929,7 @@ where
 
 fn apply_rewind<C, St>(
     worker: &mut Worker<C, St>,
-    event_tx: &broadcast::Sender<Event>,
+    working_event_tx: &broadcast::Sender<Event>,
     target: RewindTargetId,
     expected_head_entries: usize,
 ) -> bool
@@ -1907,7 +1941,7 @@ where
         Ok(applied) => {
             let session =
                 session_store::public_snapshot::project_current_session_snapshot(&applied.entries);
-            let _ = event_tx.send(Event::RewindApplied {
+            let _ = working_event_tx.send(Event::RewindApplied {
                 session,
                 input: applied.input,
                 summary: applied.summary,
@@ -1915,7 +1949,7 @@ where
             true
         }
         Err(err) => {
-            let _ = event_tx.send(Event::Error {
+            let _ = working_event_tx.send(Event::Error {
                 code: ErrorCode::InvalidRequest,
                 message: err.to_string(),
             });
@@ -2049,7 +2083,7 @@ mod tests {
         // would observe channel-closed and confuse the select! arm.
         _method_tx: mpsc::Sender<Method>,
         method_rx: mpsc::Receiver<Method>,
-        event_tx: broadcast::Sender<Event>,
+        working_event_tx: broadcast::Sender<Event>,
         cancel_tx: mpsc::Sender<()>,
         _cancel_rx: mpsc::Receiver<()>,
         pause_tx: mpsc::Sender<()>,
@@ -2070,7 +2104,7 @@ mod tests {
                 .expect("runtime dir create"),
         );
         let (method_tx, method_rx) = mpsc::channel::<Method>(16);
-        let (event_tx, _) = broadcast::channel::<Event>(16);
+        let (working_event_tx, _) = broadcast::channel::<Event>(16);
         let (cancel_tx, cancel_rx) = mpsc::channel::<()>(1);
         let (pause_tx, pause_rx) = mpsc::channel::<()>(1);
         let shared_state = Arc::new(WorkerSharedState::new(
@@ -2095,7 +2129,7 @@ mod tests {
         DriveTurnEnv {
             _method_tx: method_tx,
             method_rx,
-            event_tx,
+            working_event_tx,
             cancel_tx,
             _cancel_rx: cancel_rx,
             pause_tx,
@@ -2157,7 +2191,7 @@ mod tests {
         let (status, shutdown) = drive_turn(
             worker_future,
             &mut env.method_rx,
-            &env.event_tx,
+            &env.working_event_tx,
             &env.cancel_tx,
             &env.pause_tx,
             &env.shared_state,
@@ -2200,7 +2234,7 @@ mod tests {
         let (status, shutdown) = drive_turn(
             worker_future,
             &mut env.method_rx,
-            &env.event_tx,
+            &env.working_event_tx,
             &env.cancel_tx,
             &env.pause_tx,
             &env.shared_state,
@@ -2230,7 +2264,7 @@ mod tests {
         let (status, _) = drive_turn(
             worker_future,
             &mut env.method_rx,
-            &env.event_tx,
+            &env.working_event_tx,
             &env.cancel_tx,
             &env.pause_tx,
             &env.shared_state,
@@ -2268,7 +2302,7 @@ mod tests {
         let (status, _) = drive_turn(
             worker_future,
             &mut env.method_rx,
-            &env.event_tx,
+            &env.working_event_tx,
             &env.cancel_tx,
             &env.pause_tx,
             &env.shared_state,
@@ -2312,7 +2346,7 @@ mod tests {
         let (status, _) = drive_turn(
             worker_future,
             &mut env.method_rx,
-            &env.event_tx,
+            &env.working_event_tx,
             &env.cancel_tx,
             &env.pause_tx,
             &env.shared_state,
@@ -2354,7 +2388,7 @@ mod tests {
         let (status, shutdown) = drive_turn(
             worker_future,
             &mut env.method_rx,
-            &env.event_tx,
+            &env.working_event_tx,
             &env.cancel_tx,
             &env.pause_tx,
             &env.shared_state,
@@ -2393,7 +2427,7 @@ mod tests {
         let (status, shutdown) = drive_turn(
             worker_future,
             &mut env.method_rx,
-            &env.event_tx,
+            &env.working_event_tx,
             &env.cancel_tx,
             &env.pause_tx,
             &env.shared_state,
@@ -2430,7 +2464,7 @@ mod tests {
         let (status, shutdown) = drive_turn(
             worker_future,
             &mut env.method_rx,
-            &env.event_tx,
+            &env.working_event_tx,
             &env.cancel_tx,
             &env.pause_tx,
             &env.shared_state,
@@ -2453,7 +2487,7 @@ mod tests {
     #[tokio::test]
     async fn compact_method_is_rejected_while_running() {
         let mut env = make_env().await;
-        let mut events = env.event_tx.subscribe();
+        let mut events = env.working_event_tx.subscribe();
         env._method_tx
             .send(Method::Compact)
             .await
@@ -2466,7 +2500,7 @@ mod tests {
         let (status, shutdown) = drive_turn(
             worker_future,
             &mut env.method_rx,
-            &env.event_tx,
+            &env.working_event_tx,
             &env.cancel_tx,
             &env.pause_tx,
             &env.shared_state,

crates/worker/src/entrypoint.rs

@@ -634,10 +634,12 @@ async fn run_cli_inner(cli: Cli) -> ExitCode {
             return ExitCode::FAILURE;
         }
     };
+    let bash_output_dir = crate::bash_output_dir_for_worker_id(&worker_name);
     let started = match start_worker_controller(
         worker,
         WorkerBootstrapLayout::Direct {
             runtime_base: runtime_base.clone(),
+            bash_output_dir,
         },
         WorkerControllerTransport::UnixSocket,
     )

crates/worker/src/in_flight.rs

@@ -15,7 +15,7 @@ pub struct InFlightBlockId(u64);
 #[derive(Debug, Clone)]
 pub struct InFlightEvents {
     inner: Arc<Mutex<InFlightInner>>,
-    event_tx: broadcast::Sender<Event>,
+    working_event_tx: broadcast::Sender<Event>,
 }
 
 #[derive(Debug)]
@@ -47,14 +47,14 @@ enum TrackedBlock {
 }
 
 impl InFlightEvents {
-    pub(crate) fn new(event_tx: broadcast::Sender<Event>) -> Self {
+    pub(crate) fn new(working_event_tx: broadcast::Sender<Event>) -> Self {
         Self {
             inner: Arc::new(Mutex::new(InFlightInner {
                 next_block_id: 1,
                 blocks: Vec::new(),
                 commands: Vec::new(),
             })),
-            event_tx,
+            working_event_tx,
         }
     }
 
@@ -84,7 +84,7 @@ impl InFlightEvents {
             current.push_str(&text);
             *finished = false;
         }
-        let _ = self.event_tx.send(Event::TextDelta { text });
+        let _ = self.working_event_tx.send(Event::TextDelta { text });
     }
 
     pub(crate) fn text_done(&self, block_id: InFlightBlockId, text: String) {
@@ -100,7 +100,7 @@ impl InFlightEvents {
             }
             *finished = true;
         }
-        let _ = self.event_tx.send(Event::TextDone { text });
+        let _ = self.working_event_tx.send(Event::TextDone { text });
     }
 
     pub(crate) fn thinking_start(&self) -> InFlightBlockId {
@@ -111,7 +111,7 @@ impl InFlightEvents {
             text: String::new(),
             finished: false,
         });
-        let _ = self.event_tx.send(Event::ThinkingStart);
+        let _ = self.working_event_tx.send(Event::ThinkingStart);
         block_id
     }
 
@@ -126,7 +126,7 @@ impl InFlightEvents {
             current.push_str(&text);
             *finished = false;
         }
-        let _ = self.event_tx.send(Event::ThinkingDelta { text });
+        let _ = self.working_event_tx.send(Event::ThinkingDelta { text });
     }
 
     pub(crate) fn thinking_done(&self, block_id: InFlightBlockId, text: String) {
@@ -142,7 +142,7 @@ impl InFlightEvents {
             }
             *finished = true;
         }
-        let _ = self.event_tx.send(Event::ThinkingDone { text });
+        let _ = self.working_event_tx.send(Event::ThinkingDone { text });
     }
 
     pub(crate) fn tool_call_start(&self, id: String, name: String) -> InFlightBlockId {
@@ -155,7 +155,9 @@ impl InFlightEvents {
             args: String::new(),
             state: InFlightToolCallState::Pending,
         });
-        let _ = self.event_tx.send(Event::ToolCallStart { id, name });
+        let _ = self
+            .working_event_tx
+            .send(Event::ToolCallStart { id, name });
         block_id
     }
 
@@ -171,7 +173,7 @@ impl InFlightEvents {
             *state = InFlightToolCallState::StreamingArgs;
         }
         let _ = self
-            .event_tx
+            .working_event_tx
             .send(Event::ToolCallArgsDelta { id, json: delta });
     }
 
@@ -191,7 +193,7 @@ impl InFlightEvents {
             }
             *state = InFlightToolCallState::Done;
         }
-        let _ = self.event_tx.send(Event::ToolCallDone {
+        let _ = self.working_event_tx.send(Event::ToolCallDone {
             id,
             name,
             arguments: args,
@@ -210,7 +212,7 @@ impl InFlightEvents {
 
     pub(crate) fn publish_command_event(&self, event: CommandEvent) {
         self.lock().apply_command_event(&event);
-        let _ = self.event_tx.send(Event::Command { event });
+        let _ = self.working_event_tx.send(Event::Command { event });
     }
 
     pub(crate) fn replace_command_snapshot(&self, commands: Vec<CommandSnapshot>) {
@@ -492,13 +494,13 @@ mod tests {
 
     #[test]
     fn snapshot_boundary_does_not_duplicate_or_gap_delta_sent_after_subscribe() {
-        let (event_tx, _) = broadcast::channel(16);
-        let in_flight = InFlightEvents::new(event_tx.clone());
+        let (working_event_tx, _) = broadcast::channel(16);
+        let in_flight = InFlightEvents::new(working_event_tx.clone());
         let block_id = in_flight.start_text_block();
         in_flight.text_delta(block_id, "hel".into());
 
         let guard = in_flight.snapshot_guard();
-        let mut rx = event_tx.subscribe();
+        let mut rx = working_event_tx.subscribe();
         let snapshot = snapshot_from_guard(&guard);
         drop(guard);
 
@@ -526,9 +528,9 @@ mod tests {
         use crate::segment_log_sink::SegmentLogSink;
         use session_store::{LogEntry, LoggedRole};
 
-        let (event_tx, _) = broadcast::channel(16);
+        let (working_event_tx, _) = broadcast::channel(16);
         let sink = SegmentLogSink::new();
-        let in_flight = InFlightEvents::new(event_tx);
+        let in_flight = InFlightEvents::new(working_event_tx);
         let block_id = in_flight.start_text_block();
         in_flight.text_delta(block_id, "done".into());
         in_flight.text_done(block_id, "done".into());
@@ -580,9 +582,9 @@ mod tests {
         use crate::segment_log_sink::SegmentLogSink;
         use session_store::{LogEntry, LoggedRole};
 
-        let (event_tx, _) = broadcast::channel(16);
+        let (working_event_tx, _) = broadcast::channel(16);
         let sink = SegmentLogSink::new();
-        let in_flight = InFlightEvents::new(event_tx);
+        let in_flight = InFlightEvents::new(working_event_tx);
         let block_id = in_flight.start_text_block();
         in_flight.text_delta(block_id, "done".into());
         in_flight.text_done(block_id, "done".into());
@@ -615,8 +617,8 @@ mod tests {
 
     #[test]
     fn committed_item_clears_matching_in_flight_block() {
-        let (event_tx, _) = broadcast::channel(16);
-        let in_flight = InFlightEvents::new(event_tx);
+        let (working_event_tx, _) = broadcast::channel(16);
+        let in_flight = InFlightEvents::new(working_event_tx);
         let block_id = in_flight.start_text_block();
         in_flight.text_delta(block_id, "done".into());
         in_flight.clear_for_committed_item_then(
@@ -635,8 +637,8 @@ mod tests {
 
     #[test]
     fn committed_reasoning_summary_clears_matching_in_flight_thinking_blocks() {
-        let (event_tx, _) = broadcast::channel(16);
-        let in_flight = InFlightEvents::new(event_tx);
+        let (working_event_tx, _) = broadcast::channel(16);
+        let in_flight = InFlightEvents::new(working_event_tx);
         let first = in_flight.thinking_start();
         in_flight.thinking_delta(first, "summary A".into());
         in_flight.thinking_done(first, "".into());
@@ -660,8 +662,8 @@ mod tests {
 
     #[test]
     fn committed_encrypted_only_reasoning_clears_empty_finished_thinking_block() {
-        let (event_tx, _) = broadcast::channel(16);
-        let in_flight = InFlightEvents::new(event_tx);
+        let (working_event_tx, _) = broadcast::channel(16);
+        let in_flight = InFlightEvents::new(working_event_tx);
         let first = in_flight.thinking_start();
         in_flight.thinking_done(first, "".into());
         let second = in_flight.thinking_start();
@@ -689,9 +691,9 @@ mod tests {
 
     #[test]
     fn command_events_are_bounded_and_recoverable_from_snapshot() {
-        let (event_tx, _) = broadcast::channel(16);
-        let mut rx = event_tx.subscribe();
-        let in_flight = InFlightEvents::new(event_tx);
+        let (working_event_tx, _) = broadcast::channel(16);
+        let mut rx = working_event_tx.subscribe();
+        let in_flight = InFlightEvents::new(working_event_tx);
         in_flight.publish_command_event(CommandEvent::Started {
             command_id: "command-1".into(),
             tool_call_id: Some("tool-1".into()),
@@ -740,9 +742,9 @@ mod tests {
 
     #[test]
     fn clear_discards_uncommitted_blocks_without_protocol_event() {
-        let (event_tx, _) = broadcast::channel(16);
-        let mut rx = event_tx.subscribe();
-        let in_flight = InFlightEvents::new(event_tx);
+        let (working_event_tx, _) = broadcast::channel(16);
+        let mut rx = working_event_tx.subscribe();
+        let in_flight = InFlightEvents::new(working_event_tx);
         let text = in_flight.start_text_block();
         in_flight.text_delta(text, "stale".into());
         let tool = in_flight.tool_call_start("call-1".into(), "Bash".into());
@@ -770,8 +772,8 @@ mod tests {
 
     #[test]
     fn snapshot_omits_empty_finished_thinking_blocks() {
-        let (event_tx, _) = broadcast::channel(16);
-        let in_flight = InFlightEvents::new(event_tx);
+        let (working_event_tx, _) = broadcast::channel(16);
+        let in_flight = InFlightEvents::new(working_event_tx);
         let empty_finished = in_flight.thinking_start();
         in_flight.thinking_done(empty_finished, "".into());
         let empty_running = in_flight.thinking_start();

crates/worker/src/internal_worker.rs

@@ -752,7 +752,7 @@ pub(crate) async fn prepare_internal_worker_session(
     }
     let actor_in_flight = in_flight.clone();
     worker.attach_alerter(alerter.clone());
-    worker.attach_event_tx(event_tx.clone());
+    worker.attach_working_event_tx(event_tx.clone());
     worker.attach_in_flight_events(in_flight.clone());
     wire_event_bridges_on_engine(&mut worker, &event_tx, &alerter, &in_flight);
 

crates/worker/src/ipc/alerter.rs

@@ -28,15 +28,15 @@ pub struct Alerter {
 }
 
 struct Inner {
-    event_tx: broadcast::Sender<Event>,
+    working_event_tx: broadcast::Sender<Event>,
     buffer: Mutex<VecDeque<Alert>>,
 }
 
 impl Alerter {
-    pub fn new(event_tx: broadcast::Sender<Event>) -> Self {
+    pub fn new(working_event_tx: broadcast::Sender<Event>) -> Self {
         Self {
             inner: Arc::new(Inner {
-                event_tx,
+                working_event_tx,
                 buffer: Mutex::new(VecDeque::with_capacity(MAX_BUFFERED_ALERTS)),
             }),
         }
@@ -66,7 +66,7 @@ impl Alerter {
                 buf.pop_front();
             }
             buf.push_back(alert.clone());
-            let _ = self.inner.event_tx.send(Event::Alert(alert));
+            let _ = self.inner.working_event_tx.send(Event::Alert(alert));
         }
     }
 
@@ -81,7 +81,7 @@ impl Alerter {
             .buffer
             .lock()
             .expect("alerter buffer mutex poisoned");
-        let rx = self.inner.event_tx.subscribe();
+        let rx = self.inner.working_event_tx.subscribe();
         let snapshot: Vec<Alert> = buf.iter().cloned().collect();
         (snapshot, rx)
     }

crates/worker/src/lib.rs

@@ -27,7 +27,7 @@ mod worker;
 
 pub use bootstrap::{
     BootstrappedWorker, PreparedWorker, WorkerBootstrap, WorkerBootstrapError,
-    WorkerBootstrapLayout, start_worker_controller,
+    WorkerBootstrapLayout, bash_output_dir_for_worker_id, start_worker_controller,
 };
 pub use compact::token_counter::{EstimateSource, SplitPoint, TokenEstimate};
 pub use controller::{ShutdownReceiver, WorkerController, WorkerControllerTransport, WorkerHandle};

crates/worker/src/segment_log_sink.rs

@@ -51,7 +51,7 @@ struct SinkInner {
     /// survives session swaps so existing subscribers keep their
     /// receiver — they observe the swap as a freshly broadcast
     /// `LogEntry::AnnotatedSegmentStart` and reset their view accordingly.
-    broadcast_tx: broadcast::Sender<LogEntry>,
+    session_entry_tx: broadcast::Sender<LogEntry>,
 }
 
 impl SegmentLogSink {
@@ -59,11 +59,11 @@ impl SegmentLogSink {
     /// has been written (deferred SegmentStart) or as a placeholder in
     /// tests.
     pub fn new() -> Self {
-        let (broadcast_tx, _) = broadcast::channel(BROADCAST_CAPACITY);
+        let (session_entry_tx, _) = broadcast::channel(BROADCAST_CAPACITY);
         Self {
             inner: Arc::new(SinkInner {
                 mirror: StdMutex::new(Vec::new()),
-                broadcast_tx,
+                session_entry_tx,
             }),
         }
     }
@@ -72,11 +72,11 @@ impl SegmentLogSink {
     /// Used by restore / fork-at-restore code paths that materialise
     /// the existing log before the sink starts taking new commits.
     pub fn with_initial(entries: Vec<LogEntry>) -> Self {
-        let (broadcast_tx, _) = broadcast::channel(BROADCAST_CAPACITY);
+        let (session_entry_tx, _) = broadcast::channel(BROADCAST_CAPACITY);
         Self {
             inner: Arc::new(SinkInner {
                 mirror: StdMutex::new(entries),
-                broadcast_tx,
+                session_entry_tx,
             }),
         }
     }
@@ -111,7 +111,7 @@ impl SegmentLogSink {
             // SendError means there are zero subscribers; harmless. The
             // mirror lock is held across `send` so subscribers cannot
             // observe an inconsistent (snapshot, receiver) pair.
-            let _ = self.inner.broadcast_tx.send(entry);
+            let _ = self.inner.session_entry_tx.send(entry);
         }
     }
 
@@ -144,7 +144,7 @@ impl SegmentLogSink {
             .expect("session log mirror mutex poisoned");
         mirror.clear();
         mirror.push(initial.clone());
-        let _ = self.inner.broadcast_tx.send(initial);
+        let _ = self.inner.session_entry_tx.send(initial);
     }
 
     /// Atomically swap the mirror to the supplied replacement-session prefix
@@ -161,7 +161,7 @@ impl SegmentLogSink {
             .expect("session log mirror mutex poisoned");
         *mirror = entries;
         if let Some(initial) = first {
-            let _ = self.inner.broadcast_tx.send(initial);
+            let _ = self.inner.session_entry_tx.send(initial);
         }
     }
 
@@ -199,7 +199,7 @@ impl SegmentLogSink {
             .lock()
             .expect("session log mirror mutex poisoned");
         let snapshot = mirror.clone();
-        let rx = self.inner.broadcast_tx.subscribe();
+        let rx = self.inner.session_entry_tx.subscribe();
         (snapshot, rx)
     }
 

crates/worker/src/spawn/registry.rs

@@ -414,10 +414,10 @@ impl SpawnedWorkerRegistry {
 
     pub(crate) fn attach_parent_protocol(
         &self,
-        event_tx: broadcast::Sender<Event>,
+        working_event_tx: broadcast::Sender<Event>,
         parent_session_id: String,
     ) {
-        *self.parent_protocol.lock().unwrap() = Some((event_tx, parent_session_id));
+        *self.parent_protocol.lock().unwrap() = Some((working_event_tx, parent_session_id));
         for record in self.internal_records.lock().unwrap().clone() {
             self.start_protocol_forwarding(record);
         }

crates/worker/src/spawn/tool.rs

@@ -22,7 +22,7 @@ use manifest::{
 use serde::Deserialize;
 use tokio::sync::mpsc;
 use workdir::{
-    WorkdirDelegationPermission, WorkdirDelegationRequest, WorkdirDelegationRule,
+    WorkdirDelegationPermission, WorkdirDelegationRequest, WorkdirDelegationRule, WorkdirPath,
     WorkdirSessionHandle,
 };
 
@@ -258,9 +258,10 @@ pub struct SubWorkerSpawnTool {
     spawner_name: String,
     workspace_context: crate::worker::WorkerWorkspaceContext,
     parent_notifications: ParentNotificationTarget,
-    /// Runtime-owned root used only for bounded Internal Worker tool artifacts such as Bash spill
-    /// output. It is not an Internal Worker identity or catalog location.
+    /// Runtime-owned root used for Internal Worker controller state.
     runtime_base: PathBuf,
+    /// Parent Worker-owned temporary root used for bounded Bash spill output.
+    bash_output_dir: PathBuf,
     /// Inherited runtime workspace root for Profile/project/Ticket/workflow/
     /// memory context. SubWorkerSpawn `cwd` must not affect this value.
     workspace_root: PathBuf,
@@ -292,6 +293,7 @@ impl SubWorkerSpawnTool {
         workspace_context: crate::worker::WorkerWorkspaceContext,
         parent_notifications: ParentNotificationTarget,
         runtime_base: PathBuf,
+        bash_output_dir: PathBuf,
         workspace_root: PathBuf,
         source_workdir_session: Option<WorkdirSessionHandle>,
         registry: Arc<SpawnedWorkerRegistry>,
@@ -304,6 +306,7 @@ impl SubWorkerSpawnTool {
             workspace_context,
             parent_notifications,
             runtime_base,
+            bash_output_dir,
             workspace_root,
             source_workdir_session,
             registry,
@@ -367,7 +370,22 @@ impl Tool for SubWorkerSpawnTool {
             .reserve_internal_name(input.name.clone())
             .map_err(|error| ToolError::InvalidArgument(error.to_string()))?;
 
-        let workdir_rules = parse_workdir_scope(&input.scope)?;
+        let mut workdir_rules = parse_workdir_scope(&input.scope)?;
+        let child_bash_output_dir = self.bash_output_dir.join("sub-workers").join(&input.name);
+        tokio::fs::create_dir_all(&child_bash_output_dir)
+            .await
+            .map_err(|error| {
+                ToolError::ExecutionFailed(format!(
+                    "create Internal Worker Bash output directory {}: {error}",
+                    child_bash_output_dir.display()
+                ))
+            })?;
+        workdir_rules.push(WorkdirDelegationRule {
+            target: WorkdirPath::new_scoped(child_bash_output_dir.to_string_lossy())
+                .map_err(|error| ToolError::ExecutionFailed(error.to_string()))?,
+            permission: WorkdirDelegationPermission::Read,
+            recursive: true,
+        });
         let source_workdir_session =
             require_active_workdir_session(self.source_workdir_session.as_ref())?;
         let delegation_request = workdir_delegation_request(input.cwd.as_deref(), workdir_rules)?;
@@ -464,14 +482,22 @@ impl Tool for SubWorkerSpawnTool {
         .await
         .map_err(|error| ToolError::ExecutionFailed(format!("build Internal Worker: {error}")))?;
         child.bind_workdir_session(Some(workdir_delegation.scoped_session.clone()));
+        child
+            .add_scope_rules([ScopeRule {
+                target: child_bash_output_dir.clone(),
+                permission: manifest::Permission::Read,
+                recursive: true,
+            }])
+            .map_err(|error| {
+                ToolError::ExecutionFailed(format!(
+                    "grant Internal Worker Bash output scope: {error}"
+                ))
+            })?;
         let child_scope = child.scope().clone();
         let child_registry = SpawnedWorkerRegistry::new_internal(input.name.clone(), child_scope);
         register_worker_tools(
             &mut child,
-            self.runtime_base
-                .join("internal-workers")
-                .join(&input.name)
-                .join("bash-output"),
+            child_bash_output_dir,
             self.runtime_base.clone(),
             child_registry.clone(),
             None,
@@ -883,6 +909,7 @@ pub(crate) fn sub_worker_spawn_tool(
     workspace_context: crate::worker::WorkerWorkspaceContext,
     parent_notifications: ParentNotificationTarget,
     runtime_base: PathBuf,
+    bash_output_dir: PathBuf,
     workspace_root: PathBuf,
     source_workdir_session: Option<WorkdirSessionHandle>,
     registry: Arc<SpawnedWorkerRegistry>,
@@ -894,6 +921,7 @@ pub(crate) fn sub_worker_spawn_tool(
         workspace_context,
         parent_notifications,
         runtime_base,
+        bash_output_dir,
         workspace_root,
         source_workdir_session,
         registry,
@@ -907,6 +935,7 @@ fn sub_worker_spawn_tool_impl(
     workspace_context: crate::worker::WorkerWorkspaceContext,
     parent_notifications: ParentNotificationTarget,
     runtime_base: PathBuf,
+    bash_output_dir: PathBuf,
     workspace_root: PathBuf,
     source_workdir_session: Option<WorkdirSessionHandle>,
     registry: Arc<SpawnedWorkerRegistry>,
@@ -938,6 +967,7 @@ fn sub_worker_spawn_tool_impl(
             workspace_context.clone(),
             parent_notifications.clone(),
             runtime_base.clone(),
+            bash_output_dir.clone(),
             workspace_root.clone(),
             source_workdir_session.clone(),
             registry.clone(),
@@ -1082,12 +1112,17 @@ extract_threshold = 4000
     async fn reviewer_profile_write_scope_exposes_command_tools_and_notifies_parent_controller() {
         let runtime = TempDir::new().unwrap();
         let workspace_root = runtime.path().join("project");
+        let bash_output_dir = runtime.path().join("bash-output");
         let available_profiles = write_project_profile_registry(
             &workspace_root,
             Some("reviewer"),
             &[("reviewer", "reviewer.toml", INTERNAL_REVIEWER_PROFILE)],
         );
         let mut manifest = parent_manifest(&workspace_root, None);
+        manifest
+            .scope
+            .allow
+            .push(abs_rule(&bash_output_dir, Permission::Read));
         manifest.delegation_scope = ScopeConfig {
             allow: vec![abs_rule(&workspace_root, Permission::Write)],
             deny: Vec::new(),
@@ -1118,6 +1153,7 @@ extract_threshold = 4000
             workspace_context,
             ParentNotificationTarget::Controller(parent_method_tx.downgrade()),
             runtime.path().to_path_buf(),
+            bash_output_dir.clone(),
             workspace_root.clone(),
             Some(source_workdir_session),
             registry.clone(),
@@ -1167,6 +1203,12 @@ extract_threshold = 4000
             .await
             .expect("spawn project reviewer as Internal Worker");
         assert!(output.summary.contains("internal worker `reviewer-child`"));
+        assert!(
+            bash_output_dir
+                .join("sub-workers")
+                .join("reviewer-child")
+                .is_dir()
+        );
         assert!(spawner_scope.snapshot().is_writable(&workspace_root));
         let record = registry
             .get_internal("reviewer-child")

crates/worker/src/worker.rs

@@ -1149,7 +1149,7 @@ pub struct Worker<C: LlmClient, St: Store> {
     /// etc.). Attached by the Controller alongside `alerter`. Unlike
     /// notifications, events sent here are NOT replayed to clients that
     /// connect after the fact — they are fire-and-forget broadcasts.
-    event_tx: Option<broadcast::Sender<Event>>,
+    working_event_tx: Option<broadcast::Sender<Event>>,
     /// Parent-owned projection/control boundary for observable Internal service Workers.
     /// Service Workers are never exposed through the model-facing SubWorker control surface.
     internal_worker_registry: Option<Arc<crate::spawn::registry::SpawnedWorkerRegistry>>,
@@ -1304,7 +1304,7 @@ impl<C: LlmClient + Clone + 'static, St: Store + Clone + 'static> Worker<C, St>
             system_prompt_template: None,
             feature_instructions: self.feature_instructions.clone(),
             alerter: self.alerter.clone(),
-            event_tx: self.event_tx.clone(),
+            working_event_tx: self.working_event_tx.clone(),
             internal_worker_registry: self.internal_worker_registry.clone(),
             in_flight: self.in_flight.clone(),
             ai_activity_counter: self.ai_activity_counter.clone(),
@@ -1497,7 +1497,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
             system_prompt_template: None,
             feature_instructions: Vec::new(),
             alerter: None,
-            event_tx: None,
+            working_event_tx: None,
             internal_worker_registry: None,
             in_flight: None,
             ai_activity_counter: Arc::new(AtomicUsize::new(0)),
@@ -2190,13 +2190,13 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
     /// The Controller wires this alongside [`attach_alerter`] so that
     /// Worker-internal operations (currently: compaction) can surface
     /// progress to connected clients.
-    pub fn attach_event_tx(&mut self, event_tx: broadcast::Sender<Event>) {
+    pub fn attach_working_event_tx(&mut self, working_event_tx: broadcast::Sender<Event>) {
         let session_id = self.session_id().to_string();
         let registry = self.internal_worker_registry.get_or_insert_with(
             crate::spawn::registry::SpawnedWorkerRegistry::new_for_internal_services,
         );
-        registry.attach_parent_protocol(event_tx.clone(), session_id);
-        self.event_tx = Some(event_tx);
+        registry.attach_parent_protocol(working_event_tx.clone(), session_id);
+        self.working_event_tx = Some(working_event_tx);
     }
 
     pub(crate) fn attach_internal_worker_registry(
@@ -2240,10 +2240,10 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
     }
 
     /// Broadcast a typed `Event` to connected clients. No-op when no
-    /// `event_tx` is attached (tests / direct `Worker::new` usage) or when
+    /// `working_event_tx` is attached (tests / direct `Worker::new` usage) or when
     /// no clients are currently subscribed.
     fn send_event(&self, event: Event) {
-        if let Some(tx) = self.event_tx.as_ref() {
+        if let Some(tx) = self.working_event_tx.as_ref() {
             let _ = tx.send(event);
         }
     }
@@ -4407,7 +4407,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
             .with_memory_settings(&memory_cfg)
             .emit(
                 self.workspace_client(),
-                self.event_tx.as_ref(),
+                self.working_event_tx.as_ref(),
                 memory::audit::WorkerLifecycleStatus::Skipped,
                 "extract_threshold_disabled",
                 None,
@@ -4438,7 +4438,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
                 .with_memory_settings(&memory_cfg)
                 .emit(
                     self.workspace_client(),
-                    self.event_tx.as_ref(),
+                    self.working_event_tx.as_ref(),
                     memory::audit::WorkerLifecycleStatus::Skipped,
                     "extract_already_in_flight",
                     None,
@@ -4503,7 +4503,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
             Some(model_audit_from_manifest(model)),
         )
         .with_memory_settings(memory_cfg);
-        let event_tx = self.event_tx.as_ref();
+        let working_event_tx = self.working_event_tx.as_ref();
 
         let pointer_snapshot = self
             .extract_pointer
@@ -4519,7 +4519,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
         if tokens_since < threshold {
             audit.emit(
                 self.workspace_client(),
-                event_tx,
+                working_event_tx,
                 memory::audit::WorkerLifecycleStatus::Skipped,
                 format!(
                     "token_threshold_not_reached tokens_since={tokens_since} threshold={threshold}"
@@ -4536,7 +4536,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
             audit
                 .emit(
                     self.workspace_client(),
-                    event_tx,
+                    working_event_tx,
                     memory::audit::WorkerLifecycleStatus::Skipped,
                     "no_new_history_items",
                     None,
@@ -4564,7 +4564,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
             audit
                 .emit(
                     self.workspace_client(),
-                    event_tx,
+                    working_event_tx,
                     memory::audit::WorkerLifecycleStatus::Skipped,
                     "empty_segment_log",
                     None,
@@ -4583,7 +4583,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
             audit
                 .emit(
                     self.workspace_client(),
-                    event_tx,
+                    working_event_tx,
                     memory::audit::WorkerLifecycleStatus::Skipped,
                     "no_new_segment_entries",
                     None,
@@ -4613,7 +4613,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
         audit
             .emit(
                 self.workspace_client(),
-                event_tx,
+                working_event_tx,
                 memory::audit::WorkerLifecycleStatus::Started,
                 format!(
                     "token_threshold_reached tokens_since={tokens_since} threshold={threshold}"
@@ -4637,7 +4637,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
                 audit
                     .emit(
                         self.workspace_client(),
-                        event_tx,
+                        working_event_tx,
                         memory::audit::WorkerLifecycleStatus::Failed,
                         format!("client_build_failed: {err}"),
                         None,
@@ -4659,7 +4659,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
                 audit
                     .emit(
                         self.workspace_client(),
-                        event_tx,
+                        working_event_tx,
                         memory::audit::WorkerLifecycleStatus::Failed,
                         format!("prompt_render_failed: {err}"),
                         None,
@@ -4737,7 +4737,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
                     audit
                         .emit(
                             self.workspace_client(),
-                            event_tx,
+                            working_event_tx,
                             memory::audit::WorkerLifecycleStatus::Cancelled,
                             "worker_cancelled: internal Worker run rolled back before AI output",
                             usage,
@@ -4760,7 +4760,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
                 audit
                     .emit(
                         self.workspace_client(),
-                        event_tx,
+                        working_event_tx,
                         lifecycle_status_for_worker_error(&err.source),
                         format!("worker_failed: {}", err.source),
                         usage,
@@ -4812,7 +4812,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
         audit
             .emit(
                 self.workspace_client(),
-                event_tx,
+                working_event_tx,
                 memory::audit::WorkerLifecycleStatus::Completed,
                 reason,
                 usage,
@@ -4847,7 +4847,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
             .with_memory_settings(&memory_cfg)
             .emit(
                 self.workspace_client(),
-                self.event_tx.as_ref(),
+                self.working_event_tx.as_ref(),
                 memory::audit::WorkerLifecycleStatus::Skipped,
                 "consolidation_threshold_disabled",
                 None,
@@ -4889,7 +4889,7 @@ impl<C: LlmClient + 'static, St: Store> Worker<C, St> {
                 .with_memory_settings(&memory_cfg)
                 .emit(
                     self.workspace_client(),
-                    self.event_tx.as_ref(),
+                    self.working_event_tx.as_ref(),
                     memory::audit::WorkerLifecycleStatus::Skipped,
                     "consolidation_backend_operation_failed",
                     None,
@@ -4942,18 +4942,18 @@ fn model_audit_from_manifest(model: &manifest::ModelManifest) -> memory::audit::
 }
 
 fn emit_memory_worker_event(
-    event_tx: Option<&broadcast::Sender<Event>>,
+    working_event_tx: Option<&broadcast::Sender<Event>>,
     run_id: uuid::Uuid,
     worker: memory::audit::AuditWorker,
     status: memory::audit::WorkerLifecycleStatus,
     trigger: memory::audit::AuditTrigger,
     reason: &str,
 ) {
-    let Some(event_tx) = event_tx else {
+    let Some(working_event_tx) = working_event_tx else {
         return;
     };
     let message = format!("memory {} {}: {reason}", worker.label(), status.label());
-    let _ = event_tx.send(Event::MemoryWorker(protocol::MemoryWorkerEvent {
+    let _ = working_event_tx.send(Event::MemoryWorker(protocol::MemoryWorkerEvent {
         worker: worker.label().to_string(),
         status: status.label().to_string(),
         run_id: run_id.to_string(),
@@ -5003,7 +5003,7 @@ impl WorkerAuditBase {
     async fn emit(
         &self,
         workspace_client: &dyn WorkspaceClient,
-        event_tx: Option<&broadcast::Sender<Event>>,
+        working_event_tx: Option<&broadcast::Sender<Event>>,
         status: memory::audit::WorkerLifecycleStatus,
         reason: impl Into<String>,
         usage: Option<memory::audit::UsageAudit>,
@@ -5034,7 +5034,7 @@ impl WorkerAuditBase {
             .await;
         if should_emit_memory_worker_event(self.worker, status, &reason) {
             emit_memory_worker_event(
-                event_tx,
+                working_event_tx,
                 self.run_id,
                 self.worker,
                 status,
@@ -5218,7 +5218,7 @@ where
             system_prompt_template: common.system_prompt_template,
             feature_instructions: common.feature_instructions,
             alerter: None,
-            event_tx: None,
+            working_event_tx: None,
             internal_worker_registry: None,
             in_flight: None,
             ai_activity_counter: Arc::new(AtomicUsize::new(0)),
@@ -5302,7 +5302,7 @@ where
             system_prompt_template: common.system_prompt_template,
             feature_instructions: common.feature_instructions,
             alerter: None,
-            event_tx: None,
+            working_event_tx: None,
             internal_worker_registry: None,
             in_flight: None,
             ai_activity_counter: Arc::new(AtomicUsize::new(0)),
@@ -5421,7 +5421,7 @@ where
             system_prompt_template: common.system_prompt_template,
             feature_instructions: common.feature_instructions,
             alerter: None,
-            event_tx: None,
+            working_event_tx: None,
             internal_worker_registry: None,
             in_flight: None,
             ai_activity_counter: Arc::new(AtomicUsize::new(0)),
@@ -5797,7 +5797,7 @@ where
             system_prompt_template: None,
             feature_instructions: common.feature_instructions,
             alerter: None,
-            event_tx: None,
+            working_event_tx: None,
             internal_worker_registry: None,
             in_flight: None,
             ai_activity_counter: Arc::new(AtomicUsize::new(0)),

crates/worker/tests/compact_events_test.rs

@@ -382,7 +382,7 @@ async fn compact_emits_session_start_carrying_summary_and_task_snapshot() {
     let mut worker = make_worker(client).await;
 
     let (tx, _rx_keep) = broadcast::channel::<Event>(64);
-    worker.attach_event_tx(tx);
+    worker.attach_working_event_tx(tx);
 
     worker.run_text("first").await.unwrap();
     let session_id = worker.session_id();
@@ -429,7 +429,7 @@ async fn pre_run_compact_success_broadcasts_start_and_done() {
     let mut worker = make_worker(client).await;
 
     let (tx, mut rx) = broadcast::channel::<Event>(64);
-    worker.attach_event_tx(tx);
+    worker.attach_working_event_tx(tx);
 
     worker.run_text("first").await.unwrap();
     // Drain run events so only compact events remain in `rx`.
@@ -539,7 +539,7 @@ async fn mid_turn_compact_success_broadcasts_start_and_done() {
     let mut worker = make_worker_with_manifest(MID_TURN_MANIFEST_TOML, client).await;
 
     let (tx, mut rx) = broadcast::channel::<Event>(64);
-    worker.attach_event_tx(tx);
+    worker.attach_working_event_tx(tx);
 
     // First run populates usage_history above the request threshold.
     worker.run_text("first").await.unwrap();
@@ -718,7 +718,7 @@ async fn pre_run_compact_failure_broadcasts_start_and_failed() {
     let mut worker = make_worker(client).await;
 
     let (tx, mut rx) = broadcast::channel::<Event>(64);
-    worker.attach_event_tx(tx);
+    worker.attach_working_event_tx(tx);
 
     worker.run_text("first").await.unwrap();
     let _ = drain(&mut rx);
@@ -861,7 +861,8 @@ async fn controller_compact_method_emits_start_and_done() {
     ]);
     let worker = make_worker_with_manifest(POST_RUN_MANIFEST_TOML, client).await;
     let runtime_tmp = tempfile::tempdir().unwrap();
-    let (handle, _shutdown) = WorkerController::spawn(worker, runtime_tmp.path())
+    let bash_output_dir = runtime_tmp.path().join("bash-output");
+    let (handle, _shutdown) = WorkerController::spawn(worker, runtime_tmp.path(), &bash_output_dir)
         .await
         .unwrap();
     let mut rx = handle.subscribe();

crates/worker/tests/controller_test.rs

@@ -276,12 +276,38 @@ async fn spawn_controller(worker: Worker<MockClient, TestStore>) -> WorkerHandle
     let tmp = tempfile::tempdir().unwrap();
     let runtime_base = tmp.path().to_owned();
     std::mem::forget(tmp);
-    let (handle, _shutdown_rx) = WorkerController::spawn(worker, &runtime_base)
+    let bash_output_dir = runtime_base.join("bash-output");
+    let (handle, _shutdown_rx) = WorkerController::spawn(worker, &runtime_base, &bash_output_dir)
         .await
         .unwrap();
     handle
 }
 
+#[tokio::test]
+async fn controller_grants_read_scope_for_exact_bash_output_directory() {
+    let worker = make_worker(MockClient::new(simple_text_events())).await;
+    let shared_scope = worker.scope().clone();
+    let runtime_base = tempfile::tempdir().unwrap();
+    let worker_tmp = tempfile::tempdir().unwrap();
+    let bash_output_dir = worker_tmp.path().join("worker-1").join("bash-output");
+
+    let (handle, shutdown_rx) =
+        WorkerController::spawn(worker, runtime_base.path(), &bash_output_dir)
+            .await
+            .unwrap();
+
+    assert!(bash_output_dir.is_dir());
+    assert!(shared_scope.snapshot().allow_rules().iter().any(|rule| {
+        rule.target == bash_output_dir
+            && rule.permission == manifest::Permission::Read
+            && rule.recursive
+    }));
+    assert!(!handle.runtime_dir.path().join("bash-output").exists());
+
+    handle.send(Method::Shutdown).await.unwrap();
+    shutdown_rx.await.unwrap();
+}
+
 #[tokio::test]
 async fn shutdown_closes_bound_workdir_session() {
     let (mut worker, pwd) = make_worker_with_pwd(MockClient::new(simple_text_events())).await;
@@ -297,6 +323,7 @@ async fn shutdown_closes_bound_workdir_session() {
             command: "sleep 30".to_owned(),
             timeout_secs: 60,
             output_limit: 1024,
+            spill_dir: None,
             tool_call_id: None,
         })
         .await
@@ -304,9 +331,11 @@ async fn shutdown_closes_bound_workdir_session() {
     worker.bind_workdir_session(Some(Arc::clone(&session)));
 
     let runtime_base = tempfile::tempdir().unwrap();
-    let (handle, shutdown_rx) = WorkerController::spawn(worker, runtime_base.path())
-        .await
-        .unwrap();
+    let bash_output_dir = runtime_base.path().join("bash-output");
+    let (handle, shutdown_rx) =
+        WorkerController::spawn(worker, runtime_base.path(), &bash_output_dir)
+            .await
+            .unwrap();
     handle.send(Method::Shutdown).await.unwrap();
     tokio::time::timeout(std::time::Duration::from_secs(5), shutdown_rx)
         .await
@@ -338,6 +367,7 @@ async fn controller_projects_workdir_command_events_and_snapshot_state() {
             command: "printf ready; sleep 0.3; printf done".to_owned(),
             timeout_secs: 5,
             output_limit: 1024,
+            spill_dir: None,
             tool_call_id: Some("tool-command-1".into()),
         })
         .await
@@ -445,6 +475,7 @@ async fn controller_refreshes_command_snapshot_after_high_output_provider_lag()
                 .to_owned(),
             timeout_secs: 10,
             output_limit: 1024,
+            spill_dir: None,
             tool_call_id: Some("tool-high-output".into()),
         })
         .await
@@ -508,8 +539,9 @@ async fn controller_startup_failure_closes_bound_workdir_session() {
     let invalid_runtime_base = runtime_base.path().join("not-a-directory");
     std::fs::write(&invalid_runtime_base, "file").unwrap();
 
+    let bash_output_dir = runtime_base.path().join("bash-output");
     assert!(
-        WorkerController::spawn(worker, &invalid_runtime_base)
+        WorkerController::spawn(worker, &invalid_runtime_base, &bash_output_dir)
             .await
             .is_err()
     );
@@ -519,6 +551,7 @@ async fn controller_startup_failure_closes_bound_workdir_session() {
                 command: "printf unreachable".to_owned(),
                 timeout_secs: 5,
                 output_limit: 1024,
+                spill_dir: None,
                 tool_call_id: None,
             })
             .await,
@@ -863,7 +896,8 @@ permission = "write"
     let client = MockClient::new(simple_text_events());
     let worker = make_worker_with_pwd_and_manifest(client, manifest).await.0;
     let tmp = tempfile::tempdir().unwrap();
-    let result = WorkerController::spawn(worker, tmp.path()).await;
+    let bash_output_dir = tmp.path().join("bash-output");
+    let result = WorkerController::spawn(worker, tmp.path(), &bash_output_dir).await;
     assert!(
         result.is_ok(),
         "feature exposure must not imply delegation authority"
@@ -1515,7 +1549,7 @@ async fn notify_while_idle_auto_starts_turn_and_injects_system_message() {
     // after that.
     wait_for_status(&handle, WorkerStatus::Idle).await;
     // The live echo arrives via the sink's `Event::SystemItem` lane,
-    // not on the `event_tx` broadcast that `handle.subscribe()` taps.
+    // not on the `working_event_tx` broadcast that `handle.subscribe()` taps.
     // Verify the notification landed on the sink mirror instead.
     let (entries, _) = handle.sink.subscribe_with_snapshot();
     let saw_notify_in_mirror = entries.iter().any(|e| {
@@ -1899,7 +1933,7 @@ async fn socket_worker_event_turn_ended_while_idle_auto_starts_turn() {
 
     let deadline = tokio::time::Instant::now() + std::time::Duration::from_secs(2);
     // The SystemItem and TurnEnd events arrive through independent
-    // broadcast lanes (sink fan-out vs `event_tx`), so their relative
+    // broadcast lanes (sink fan-out vs `working_event_tx`), so their relative
     // order on the wire is non-deterministic. Keep reading until both
     // are observed (or the deadline trips), rather than breaking on
     // the first TurnEnd.

crates/workspace-server/src/server.rs

@@ -15551,6 +15551,7 @@ mod tests {
                 command: "printf ready; sleep 30".to_string(),
                 timeout_secs: 60,
                 output_limit: 4096,
+                spill_dir: None,
                 tool_call_id: Some("tool-call-command-session".to_string()),
             })
             .await

crates/yoi/src/cli_connection.rs

@@ -118,7 +118,7 @@ fn standalone_target() -> Result<Box<dyn Target>, ParseError> {
         })?
         .join("client")
         .join("standalone")
-        .join("sessions");
+        .join("workers");
     Ok(Box::new(StandaloneTarget::new(state_dir)))
 }
 

crates/yoi/src/main.rs

@@ -798,7 +798,7 @@ fn parse_console_options<R: CliConnectionResolver + ?Sized>(
         }
         if session.is_some() {
             return Err(ParseError(
-                "--local does not accept legacy --session; use --local --resume for Standalone session restore"
+                "--local does not accept legacy --session; use --local --resume for Standalone Worker restore"
                     .to_string(),
             ));
         }
@@ -834,7 +834,7 @@ fn parse_console_options<R: CliConnectionResolver + ?Sized>(
 
     if target.kind() == TargetKind::Standalone && (session.is_some() || socket_override.is_some()) {
         return Err(ParseError(
-            "Standalone does not accept legacy Worker session or socket selectors; use --resume for the standalone session store"
+            "Standalone does not accept legacy Worker session or socket selectors; use --resume for the standalone Worker store"
                 .to_string(),
         ));
     }
@@ -951,7 +951,7 @@ fn parse_workers_args<R: CliConnectionResolver + ?Sized>(
     )?;
     if target.kind() != TargetKind::Backend {
         return Err(ParseError(
-            "yoi workers requires a Backend connection target; use yoi --local --resume for Standalone sessions"
+            "yoi workers requires a Backend connection target; use yoi --local --resume for Standalone Workers"
                 .to_string(),
         ));
     }
@@ -1750,8 +1750,8 @@ Usage:
 
 Target selection:
       --local              Use the client-owned one-process Standalone host
-      --resume             With --local, restore from the Standalone session store
-      --all                With Standalone restore, include sessions from every cwd identity
+      --resume             With --local, restore from the Standalone Worker store
+      --all                With Standalone restore, include Workers from every cwd identity
       --backend <URL>      Use a Workspace Backend explicitly
       --workspace-id <ID>  Scope Backend routes to a Workspace id
 
@@ -1761,7 +1761,7 @@ Target selection:
 
 Connection-aware commands:
   yoi                         Standalone: new Console. Backend: Worker picker.
-  yoi resume                  Standalone session picker or stopped Backend Worker picker.
+  yoi resume                  Standalone Worker picker or stopped Backend Worker picker.
   yoi workers                 Backend Workspace Worker picker.
   yoi panel                   Backend Workspace dashboard.
 
@@ -1800,7 +1800,7 @@ Usage:
   yoi --backend <URL> [--workspace-id <ID>] workers [-r|--stopped] [--workspace <PATH>] [--runtime-id <ID>]
 
 Authority:
-  Lists Workers from the selected Backend Workspace. Standalone sessions are restored with
+  Lists Workers from the selected Backend Workspace. Standalone Workers are restored with
   `yoi --local --resume` and are not part of the Workspace Worker catalog.
 
 Options:
@@ -1822,13 +1822,13 @@ Usage:
   yoi [TARGET] resume [--workspace <PATH>|--all] [--runtime-id <ID>]
 
 Target options:
-      --local              Restore from the client-owned Standalone session store
+      --local              Restore from the client-owned Standalone Worker store
       --backend <URL>      Restore a stopped Backend Workspace Worker
       --workspace-id <ID>  Scope Backend routes to a Workspace id
 
 Options:
-      --workspace <PATH>   Scope Standalone sessions to this cwd identity (defaults to cwd)
-      --all                Include Standalone sessions from every cwd identity
+      --workspace <PATH>   Scope Standalone Workers to this cwd identity (defaults to cwd)
+      --all                Include Standalone Workers from every cwd identity
       --runtime-id <ID>    Restrict the Backend stopped-Worker picker to a Runtime id
   -h, --help               Print help
 "#;
@@ -2222,8 +2222,8 @@ backend = "shared"
             mode,
             LaunchMode::StandaloneResume { include_all: false }
         ));
-        let intent = target.standalone_session_list(false).unwrap();
-        assert!(intent.state_dir.ends_with("client/standalone/sessions"));
+        let intent = target.standalone_worker_list(false).unwrap();
+        assert!(intent.state_dir.ends_with("client/standalone/workers"));
         assert!(!intent.include_all);
 
         let mode = parse_args_from(["--local", "--resume", "--all"]).unwrap();
@@ -2264,7 +2264,7 @@ backend = "shared"
         let err = parse_args_slice_with_connection_resolver(&session_args, &resolver).unwrap_err();
         assert_eq!(
             err.0,
-            "--local does not accept legacy --session; use --local --resume for Standalone session restore"
+            "--local does not accept legacy --session; use --local --resume for Standalone Worker restore"
         );
 
         let socket_args = [
@@ -2903,12 +2903,12 @@ backend = "shared"
     }
 
     #[test]
-    fn parse_resume_help_uses_standalone_session_store_terminology() {
+    fn parse_resume_help_uses_standalone_worker_store_terminology() {
         match parse_args_from(["resume", "--help"]).unwrap() {
             Mode::ResumeHelp => {}
             _ => panic!("expected ResumeHelp mode"),
         }
-        assert!(RESUME_HELP.contains("Standalone session store"));
+        assert!(RESUME_HELP.contains("Standalone Worker store"));
         assert!(RESUME_HELP.contains("Backend stopped-Worker picker"));
         assert!(!RESUME_HELP.contains("local Worker records"));
         assert!(!RESUME_HELP.contains("local workspace"));