runtime: remove worker transcript projection

crates/client/src/backend_runtime.rs

@@ -3,13 +3,12 @@ use std::fmt;
 use std::time::Duration;
 
 use futures::StreamExt;
-use protocol::{ErrorCode, Event, Greeting, InFlightSnapshot, Method, Segment, WorkerStatus};
+use protocol::{ErrorCode, Event, Method, Segment};
 use serde::{Deserialize, Serialize};
 use tokio::sync::mpsc;
 use tokio_tungstenite::connect_async;
 use tokio_tungstenite::tungstenite::Message as TungsteniteMessage;
 
-const TRANSCRIPT_SNAPSHOT_LIMIT: usize = 512;
 const RECONNECT_DELAY: Duration = Duration::from_millis(500);
 const MAX_RECONNECT_ATTEMPTS: usize = 3;
 
@@ -80,31 +79,10 @@ impl BackendRuntimeClient {
         let http = reqwest::Client::new();
         let (tx, rx) = mpsc::unbounded_channel();
 
-        let suppress_initial_snapshot = match load_initial_transcript(&http, &target).await {
-            Ok(events) => {
-                for event in events {
-                    let _ = tx.send(event);
-                }
-                true
-            }
-            Err(error) => {
-                let _ = tx.send(diagnostic_event(format!(
-                    "Backend initial transcript unavailable for {}: {error}",
-                    target.display_label()
-                )));
-                false
-            }
-        };
-
         let observation_target = target.clone();
         let observation_tx = tx.clone();
         let observation_task = tokio::spawn(async move {
-            observe_worker_events(
-                observation_target,
-                observation_tx,
-                suppress_initial_snapshot,
-            )
-            .await;
+            observe_worker_events(observation_target, observation_tx).await;
         });
 
         Ok(Self {
@@ -291,80 +269,7 @@ fn backend_command_from_method(method: &Method) -> BackendCommand {
     }
 }
 
-async fn load_initial_transcript(
-    http: &reqwest::Client,
-    target: &BackendRuntimeTarget,
-) -> Result<Vec<Event>, BackendRuntimeClientError> {
-    let path = format!(
-        "/api/runtimes/{}/workers/{}/transcript?start=0&limit={TRANSCRIPT_SNAPSHOT_LIMIT}",
-        path_segment_encode(&target.runtime_id),
-        path_segment_encode(&target.worker_id)
-    );
-    let response = http
-        .get(join_base_and_path(&target.base_url, &path))
-        .send()
-        .await?
-        .error_for_status()?;
-    let transcript: WorkerTranscriptProjection = response.json().await?;
-    Ok(transcript_projection_to_events(target, transcript))
-}
-
-fn transcript_projection_to_events(
-    target: &BackendRuntimeTarget,
-    transcript: WorkerTranscriptProjection,
-) -> Vec<Event> {
-    let mut events = vec![Event::Snapshot {
-        entries: Vec::new(),
-        greeting: Greeting {
-            worker_name: target.worker_id.clone(),
-            cwd: String::new(),
-            provider: "backend-runtime-api".to_string(),
-            model: target.runtime_id.clone(),
-            scope_summary: "Backend Runtime API worker observation".to_string(),
-            tools: Vec::new(),
-            context_window: 0,
-            context_tokens: 0,
-        },
-        status: WorkerStatus::Idle,
-        in_flight: InFlightSnapshot { blocks: Vec::new() },
-    }];
-
-    for item in transcript.items {
-        match item.role.as_str() {
-            "user" => events.push(Event::UserMessage {
-                segments: vec![Segment::text(item.content)],
-            }),
-            "assistant" => {
-                events.push(Event::TextDelta {
-                    text: item.content.clone(),
-                });
-                events.push(Event::TextDone { text: item.content });
-            }
-            role => events.push(Event::Alert(protocol::Alert {
-                level: protocol::AlertLevel::Warn,
-                source: protocol::AlertSource::Worker,
-                message: format!(
-                    "Backend transcript item with role `{role}` is not rendered as chat content"
-                ),
-                timestamp_ms: 0,
-            })),
-        }
-    }
-
-    for diagnostic in transcript.diagnostics {
-        events.push(diagnostic_event(format!(
-            "Backend transcript diagnostic [{}]: {}",
-            diagnostic.code, diagnostic.message
-        )));
-    }
-    events
-}
-
-async fn observe_worker_events(
-    target: BackendRuntimeTarget,
-    tx: mpsc::UnboundedSender<Event>,
-    mut suppress_next_snapshot: bool,
-) {
+async fn observe_worker_events(target: BackendRuntimeTarget, tx: mpsc::UnboundedSender<Event>) {
     let mut cursor: Option<String> = None;
     let mut last_sequence = 0_u64;
     let mut attempts = 0_usize;
@@ -403,12 +308,6 @@ async fn observe_worker_events(
                                         )));
                                     }
                                     cursor = Some(envelope.cursor.clone());
-                                    if suppress_next_snapshot
-                                        && matches!(envelope.payload, Event::Snapshot { .. })
-                                    {
-                                        suppress_next_snapshot = false;
-                                        continue;
-                                    }
                                     let _ = tx.send(envelope.payload);
                                 }
                                 Ok(ClientWorkerEventWsFrame::Diagnostic { diagnostic }) => {
@@ -595,20 +494,6 @@ struct BackendDiagnostic {
     message: String,
 }
 
-#[derive(Debug, Deserialize)]
-struct WorkerTranscriptProjection {
-    #[serde(default)]
-    items: Vec<WorkerTranscriptItem>,
-    #[serde(default)]
-    diagnostics: Vec<BackendDiagnostic>,
-}
-
-#[derive(Debug, Deserialize)]
-struct WorkerTranscriptItem {
-    role: String,
-    content: String,
-}
-
 #[derive(Debug, Deserialize)]
 #[serde(tag = "kind", rename_all = "snake_case")]
 enum ClientWorkerEventWsFrame {
@@ -666,29 +551,4 @@ mod tests {
             "ws://127.0.0.1:8787/api/runtimes/runtime%2Fone/workers/worker%20one/events/ws?cursor=bo_0000000000000001"
         );
     }
-
-    #[test]
-    fn transcript_projection_seeds_snapshot_and_chat_events() {
-        let target = BackendRuntimeTarget::new("http://backend", "runtime-a", "worker-b");
-        let events = transcript_projection_to_events(
-            &target,
-            WorkerTranscriptProjection {
-                items: vec![
-                    WorkerTranscriptItem {
-                        role: "user".to_string(),
-                        content: "hi".to_string(),
-                    },
-                    WorkerTranscriptItem {
-                        role: "assistant".to_string(),
-                        content: "hello".to_string(),
-                    },
-                ],
-                diagnostics: Vec::new(),
-            },
-        );
-        assert!(matches!(events[0], Event::Snapshot { .. }));
-        assert!(matches!(events[1], Event::UserMessage { .. }));
-        assert!(matches!(events[2], Event::TextDelta { .. }));
-        assert!(matches!(events[3], Event::TextDone { .. }));
-    }
 }

crates/worker-runtime/src/catalog.rs

@@ -170,10 +170,10 @@ pub struct WorkingDirectoryStatus {
 /// Browser/product launch semantics are resolved by a backend before this
 /// request is built. The request contains only durable Runtime identity inputs:
 /// a backend-decided profile selector, the Decodal profile source archive source
-/// used to resolve that selector, optional initial user input committed with the
-/// Worker catalog/transcript persistence, and an optional Runtime-owned working
-/// directory binding. Browser-facing status for materialized working directories
-/// is summarized without exposing raw host paths.
+/// used to resolve that selector, optional initial user input committed as a
+/// protocol observation event, and an optional Runtime-owned working directory
+/// binding. Browser-facing status for materialized working directories is
+/// summarized without exposing raw host paths.
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct CreateWorkerRequest {
     pub profile: ProfileSelector,
@@ -215,7 +215,6 @@ pub struct WorkerSummary {
     pub profile_source: ProfileSourceArchiveRef,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub config_bundle: Option<ConfigBundleRef>,
-    pub transcript_len: usize,
     pub last_event_id: u64,
 }
 
@@ -231,7 +230,6 @@ pub struct WorkerDetail {
     pub profile_source: ProfileSourceArchiveRef,
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub config_bundle: Option<ConfigBundleRef>,
-    pub transcript_len: usize,
     pub last_event_id: u64,
 }
 

crates/worker-runtime/src/execution.rs

@@ -305,7 +305,7 @@ pub enum WorkerExecutionSpawnResult {
 
 /// Backend boundary for Worker execution.
 ///
-/// Runtime owns Worker catalog, transcript, observation, and lifecycle state. A
+/// Runtime owns Worker catalog, protocol observation, and lifecycle state. A
 /// backend owns concrete execution. The default Runtime has no backend, so input
 /// to those Workers is rejected instead of producing providerless responses.
 pub trait WorkerExecutionBackend: Send + Sync + 'static {

crates/worker-runtime/src/fs_store.rs

@@ -5,10 +5,9 @@ use crate::error::RuntimeError;
 use crate::execution::WorkerExecutionStatus;
 use crate::identity::{RuntimeId, WorkerId, WorkerRef};
 use crate::management::{RuntimeBackendKind, RuntimeLimits, RuntimeStatus};
-use crate::observation::{
-    EventCursor, RuntimeEvent, RuntimeEventBatch, TranscriptEntry, TranscriptProjection,
-    TranscriptQuery,
-};
+#[cfg(feature = "ws-server")]
+use crate::observation::WorkerObservationEvent;
+use crate::observation::{EventCursor, RuntimeEvent, RuntimeEventBatch};
 use serde::{Deserialize, Serialize};
 use std::collections::BTreeMap;
 use std::fs::{self, File, OpenOptions};
@@ -22,7 +21,8 @@ const RUNTIME_FILE: &str = "runtime.json";
 const EVENTS_FILE: &str = "events.jsonl";
 const WORKERS_DIR: &str = "workers";
 const WORKER_FILE: &str = "worker.json";
-const TRANSCRIPT_FILE: &str = "transcript.jsonl";
+#[cfg(feature = "ws-server")]
+const OBSERVATIONS_FILE: &str = "observations.jsonl";
 
 static NEXT_TMP_SEQUENCE: AtomicU64 = AtomicU64::new(1);
 
@@ -119,42 +119,6 @@ impl FsRuntimeStore {
         })
     }
 
-    /// Read a persisted Worker transcript directly from its Worker-scoped log.
-    pub fn read_transcript(
-        &self,
-        worker_ref: &WorkerRef,
-        query: TranscriptQuery,
-        max_limit: usize,
-    ) -> Result<TranscriptProjection, RuntimeError> {
-        self.ensure_worker_ref(worker_ref)?;
-        if query.limit > max_limit {
-            return Err(RuntimeError::LimitTooLarge {
-                requested: query.limit,
-                max: max_limit,
-            });
-        }
-
-        let path = self.transcript_path(&worker_ref.worker_id);
-        let entries = read_json_lines::<TranscriptEntry>(&path, "read transcript")?;
-        let total_items = entries.len();
-        let end = query.start.saturating_add(query.limit).min(total_items);
-        let items = if query.start >= total_items {
-            Vec::new()
-        } else {
-            entries[query.start..end].to_vec()
-        };
-        let next_start = (end < total_items).then_some(end);
-
-        Ok(TranscriptProjection {
-            worker_ref: worker_ref.clone(),
-            start: query.start,
-            limit: query.limit,
-            total_items,
-            items,
-            next_start,
-        })
-    }
-
     pub(crate) fn open_or_create(
         root: PathBuf,
         runtime_id: RuntimeId,
@@ -220,7 +184,12 @@ impl FsRuntimeStore {
             &WorkerSnapshot::from_persisted(worker),
             "write worker snapshot",
         )?;
-        ensure_file_exists(&worker_dir.join(TRANSCRIPT_FILE), "create transcript log")
+        #[cfg(feature = "ws-server")]
+        ensure_file_exists(
+            &worker_dir.join(OBSERVATIONS_FILE),
+            "create observations log",
+        )?;
+        Ok(())
     }
 
     pub(crate) fn append_event(&self, event: &RuntimeEvent) -> Result<(), RuntimeError> {
@@ -230,15 +199,16 @@ impl FsRuntimeStore {
         append_json_line(&self.events_path(), event, "append event")
     }
 
-    pub(crate) fn append_transcript_entry(
+    #[cfg(feature = "ws-server")]
+    pub(crate) fn append_worker_observation_event(
         &self,
-        entry: &TranscriptEntry,
+        event: &WorkerObservationEvent,
     ) -> Result<(), RuntimeError> {
-        self.ensure_worker_ref(&entry.worker_ref)?;
+        self.ensure_worker_ref(&event.worker_ref)?;
         append_json_line(
-            &self.transcript_path(&entry.worker_ref.worker_id),
-            entry,
-            "append transcript",
+            &self.observations_path(&event.worker_ref.worker_id),
+            event,
+            "append worker observation",
         )
     }
 
@@ -278,6 +248,9 @@ impl FsRuntimeStore {
             })?;
         worker_dirs.sort_by_key(|entry| entry.path());
 
+        #[cfg(feature = "ws-server")]
+        let mut observation_events = Vec::new();
+
         for entry in worker_dirs {
             let path = entry.path();
             if !path.is_dir() {
@@ -312,38 +285,44 @@ impl FsRuntimeStore {
                 );
                 continue;
             }
-            let transcript = match read_json_lines::<TranscriptEntry>(
-                &path.join(TRANSCRIPT_FILE),
-                "read transcript",
+            #[cfg(feature = "ws-server")]
+            let worker_observations = match read_json_lines::<WorkerObservationEvent>(
+                &path.join(OBSERVATIONS_FILE),
+                "read worker observations",
             ) {
-                Ok(transcript) => transcript,
+                Ok(events) => events,
                 Err(_error) => {
                     record_worker_load_diagnostic(
                         &mut snapshot,
                         Some(worker_snapshot.worker_ref.clone()),
-                        "ignored worker with unreadable transcript while loading runtime store",
+                        "ignored worker with unreadable observations while loading runtime store",
                     );
                     continue;
                 }
             };
-            let mut transcript_valid = true;
-            for entry in &transcript {
-                if self.ensure_worker_ref(&entry.worker_ref).is_err()
-                    || entry.worker_ref.worker_id != worker_snapshot.worker_id
+            #[cfg(feature = "ws-server")]
+            let mut observations_valid = true;
+            #[cfg(feature = "ws-server")]
+            for event in &worker_observations {
+                if self.ensure_worker_ref(&event.worker_ref).is_err()
+                    || event.worker_ref.worker_id != worker_snapshot.worker_id
                 {
-                    transcript_valid = false;
+                    observations_valid = false;
                     break;
                 }
             }
-            if !transcript_valid {
+            #[cfg(feature = "ws-server")]
+            if !observations_valid {
                 record_worker_load_diagnostic(
                     &mut snapshot,
                     Some(worker_snapshot.worker_ref.clone()),
-                    "ignored worker with invalid transcript while loading runtime store",
+                    "ignored worker with invalid observations while loading runtime store",
                 );
                 continue;
             }
-            let worker = worker_snapshot.into_persisted(transcript);
+            #[cfg(feature = "ws-server")]
+            observation_events.extend(worker_observations);
+            let worker = worker_snapshot.into_persisted();
             if workers.insert(worker.worker_id.clone(), worker).is_some() {
                 record_worker_load_diagnostic(
                     &mut snapshot,
@@ -353,7 +332,15 @@ impl FsRuntimeStore {
             }
         }
 
-        Ok(snapshot.into_persisted(events, workers))
+        #[cfg(feature = "ws-server")]
+        observation_events.sort_by_key(|event| event.sequence);
+
+        Ok(snapshot.into_persisted(
+            events,
+            workers,
+            #[cfg(feature = "ws-server")]
+            observation_events,
+        ))
     }
 
     fn ensure_worker_ref(&self, worker_ref: &WorkerRef) -> Result<(), RuntimeError> {
@@ -382,8 +369,9 @@ impl FsRuntimeStore {
             .join(encoded_component(worker_id.as_str()))
     }
 
-    fn transcript_path(&self, worker_id: &WorkerId) -> PathBuf {
-        self.worker_dir(worker_id).join(TRANSCRIPT_FILE)
+    #[cfg(feature = "ws-server")]
+    fn observations_path(&self, worker_id: &WorkerId) -> PathBuf {
+        self.worker_dir(worker_id).join(OBSERVATIONS_FILE)
     }
 }
 
@@ -405,6 +393,8 @@ pub(crate) struct PersistedRuntimeState {
     pub(crate) workers: BTreeMap<WorkerId, PersistedWorkerRecord>,
     pub(crate) config_bundles: BTreeMap<String, ConfigBundle>,
     pub(crate) events: Vec<RuntimeEvent>,
+    #[cfg(feature = "ws-server")]
+    pub(crate) observation_events: Vec<WorkerObservationEvent>,
     pub(crate) diagnostics: Vec<RuntimeDiagnostic>,
 }
 
@@ -415,8 +405,6 @@ pub(crate) struct PersistedWorkerRecord {
     pub(crate) status: WorkerStatus,
     pub(crate) request: CreateWorkerRequest,
     pub(crate) execution: WorkerExecutionStatus,
-    pub(crate) transcript: Vec<TranscriptEntry>,
-    pub(crate) next_transcript_sequence: u64,
     pub(crate) last_event_id: u64,
 }
 
@@ -504,6 +492,7 @@ impl RuntimeSnapshot {
         self,
         events: Vec<RuntimeEvent>,
         workers: BTreeMap<WorkerId, PersistedWorkerRecord>,
+        #[cfg(feature = "ws-server")] observation_events: Vec<WorkerObservationEvent>,
     ) -> PersistedRuntimeState {
         PersistedRuntimeState {
             runtime_id: self.runtime_id,
@@ -516,6 +505,8 @@ impl RuntimeSnapshot {
             workers,
             config_bundles: self.config_bundles,
             events,
+            #[cfg(feature = "ws-server")]
+            observation_events,
             diagnostics: self.diagnostics,
         }
     }
@@ -530,7 +521,6 @@ struct WorkerSnapshot {
     request: CreateWorkerRequest,
     #[serde(default = "WorkerExecutionStatus::unconnected")]
     execution: WorkerExecutionStatus,
-    next_transcript_sequence: u64,
     last_event_id: u64,
 }
 
@@ -543,7 +533,6 @@ impl WorkerSnapshot {
             status: worker.status,
             request: worker.request.clone(),
             execution: worker.execution.clone(),
-            next_transcript_sequence: worker.next_transcript_sequence,
             last_event_id: worker.last_event_id,
         }
     }
@@ -582,15 +571,13 @@ impl WorkerSnapshot {
         Ok(())
     }
 
-    fn into_persisted(self, transcript: Vec<TranscriptEntry>) -> PersistedWorkerRecord {
+    fn into_persisted(self) -> PersistedWorkerRecord {
         PersistedWorkerRecord {
             worker_ref: self.worker_ref,
             worker_id: self.worker_id,
             status: self.status,
             request: self.request,
             execution: self.execution,
-            transcript,
-            next_transcript_sequence: self.next_transcript_sequence,
             last_event_id: self.last_event_id,
         }
     }

crates/worker-runtime/src/http_server.rs

@@ -18,7 +18,6 @@ use crate::interaction::{WorkerInput, WorkerInteractionAck};
 use crate::management::{RuntimeLimits, RuntimeSummary};
 #[cfg(feature = "ws-server")]
 use crate::observation::WorkerObservationCursor;
-use crate::observation::{TranscriptProjection, TranscriptQuery};
 use axum::body::{Body, Bytes};
 use axum::extract::rejection::{JsonRejection, QueryRejection};
 #[cfg(feature = "ws-server")]
@@ -151,11 +150,7 @@ pub fn runtime_http_router(runtime: Runtime, local_token: Option<String>) -> Rou
         .route("/v1/workers/{worker_id}", get(get_worker))
         .route("/v1/workers/{worker_id}/input", post(send_worker_input))
         .route("/v1/workers/{worker_id}/stop", post(stop_worker))
-        .route("/v1/workers/{worker_id}/cancel", post(cancel_worker))
-        .route(
-            "/v1/workers/{worker_id}/transcript",
-            get(get_worker_transcript),
-        );
+        .route("/v1/workers/{worker_id}/cancel", post(cancel_worker));
 
     #[cfg(feature = "ws-server")]
     let router = router.route("/v1/workers/{worker_id}/events/ws", get(worker_events_ws));
@@ -243,12 +238,6 @@ pub struct RuntimeHttpWorkerLifecycleResponse {
     pub ack: WorkerLifecycleAck,
 }
 
-/// `GET /v1/workers/{worker_id}/transcript` response.
-#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub struct RuntimeHttpTranscriptResponse {
-    pub transcript: TranscriptProjection,
-}
-
 /// Typed REST error response.
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct RuntimeHttpErrorResponse {
@@ -299,18 +288,6 @@ struct RuntimeWorkerEventsWsQuery {
     cursor: Option<String>,
 }
 
-#[derive(Clone, Debug, Deserialize)]
-struct RuntimeHttpTranscriptQuery {
-    #[serde(default)]
-    start: usize,
-    #[serde(default = "default_transcript_limit")]
-    limit: usize,
-}
-
-fn default_transcript_limit() -> usize {
-    256
-}
-
 #[cfg(feature = "ws-server")]
 impl RuntimeWorkerEventWsFrame {
     fn event(
@@ -714,20 +691,6 @@ async fn cancel_worker(
     Ok(Json(RuntimeHttpWorkerLifecycleResponse { ack }))
 }
 
-async fn get_worker_transcript(
-    State(state): State<RuntimeHttpState>,
-    Path(worker_id): Path<String>,
-    query: Result<Query<RuntimeHttpTranscriptQuery>, QueryRejection>,
-) -> RestResult<RuntimeHttpTranscriptResponse> {
-    let worker_ref = worker_ref_for(&state.runtime, worker_id)?;
-    let Query(query) = query.map_err(RuntimeHttpRestError::query_rejection)?;
-    let transcript = state
-        .runtime
-        .transcript_projection(&worker_ref, TranscriptQuery::new(query.start, query.limit))
-        .map_err(RuntimeHttpRestError::runtime)?;
-    Ok(Json(RuntimeHttpTranscriptResponse { transcript }))
-}
-
 fn worker_ref_for(runtime: &Runtime, worker_id: String) -> Result<WorkerRef, RuntimeHttpRestError> {
     let worker_id = WorkerId::new(worker_id).ok_or_else(|| {
         RuntimeHttpRestError::new(
@@ -1067,8 +1030,7 @@ mod tests {
         )
         .await;
         assert_eq!(response.status(), StatusCode::OK);
-        let input_ack: RuntimeHttpWorkerInputResponse = read_json(response).await;
-        assert_eq!(input_ack.ack.transcript_sequence, 1);
+        let _input_ack: RuntimeHttpWorkerInputResponse = read_json(response).await;
 
         let response = empty_request(
             app.clone(),
@@ -1077,21 +1039,15 @@ mod tests {
         )
         .await;
         assert_eq!(response.status(), StatusCode::OK);
-        let detail: RuntimeHttpWorkerResponse = read_json(response).await;
-        assert_eq!(detail.worker.transcript_len, 1);
+        let _detail: RuntimeHttpWorkerResponse = read_json(response).await;
 
         let response = empty_request(
             app.clone(),
             Method::GET,
-            &format!(
-                "/v1/workers/{}/transcript?start=0&limit=1",
-                created.worker.worker_id
-            ),
+            &format!("/v1/workers/{}/transcript", created.worker.worker_id),
         )
         .await;
-        assert_eq!(response.status(), StatusCode::OK);
-        let transcript: RuntimeHttpTranscriptResponse = read_json(response).await;
-        assert_eq!(transcript.transcript.items[0].content, "hello from backend");
+        assert_eq!(response.status(), StatusCode::NOT_FOUND);
 
         let response = empty_request(
             app.clone(),
@@ -1117,7 +1073,6 @@ mod tests {
         assert_eq!(response.status(), StatusCode::OK);
         let workers: RuntimeHttpWorkersResponse = read_json(response).await;
         assert_eq!(workers.workers.len(), 1);
-        assert_eq!(workers.workers[0].transcript_len, 1);
 
         let response = empty_request(app, Method::GET, "/v1/runtime").await;
         assert_eq!(response.status(), StatusCode::OK);

crates/worker-runtime/src/interaction.rs

@@ -10,8 +10,7 @@ pub enum WorkerInputKind {
     System,
 }
 
-/// Worker input request.  v0 stores the input in an in-memory transcript and
-/// does not execute providers/tools.
+/// Worker input request accepted by a Runtime Worker.
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct WorkerInput {
     pub kind: WorkerInputKind,
@@ -34,11 +33,10 @@ impl WorkerInput {
     }
 }
 
-/// Acknowledgement returned after input is accepted into the in-memory Worker.
+/// Acknowledgement returned after input is accepted into the Worker.
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct WorkerInteractionAck {
     pub worker_ref: WorkerRef,
     pub status: WorkerStatus,
-    pub transcript_sequence: u64,
     pub event_id: u64,
 }

crates/worker-runtime/src/main.rs

@@ -238,10 +238,6 @@ where
                 }
                 config.http.local_token = Some(value);
             }
-            "--max-transcript-projection-items" => {
-                config.http.limits.max_transcript_projection_items =
-                    parse_usize_flag(&flag, take_value(&flag, inline_value, &mut args)?)?;
-            }
             "--max-event-batch-items" => {
                 config.http.limits.max_event_batch_items =
                     parse_usize_flag(&flag, take_value(&flag, inline_value, &mut args)?)?;
@@ -436,7 +432,6 @@ Options:\n\
   --fs-root <PATH>                      Runtime catalog filesystem store root\n\
   --local-token <TOKEN>                 Minimal local bearer token placeholder\n\
   --local-token-env <ENV>               Read local bearer token placeholder from env\n\
-  --max-transcript-projection-items <N> Override transcript projection limit\n\
   --max-event-batch-items <N>           Override event batch limit\n\
   -h, --help                            Show this help"
 }

crates/worker-runtime/src/management.rs

@@ -18,17 +18,15 @@ pub enum RuntimeStatus {
     Stopped,
 }
 
-/// Guardrails for bounded observation/projection APIs.
+/// Guardrails for bounded Runtime APIs.
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
 pub struct RuntimeLimits {
-    pub max_transcript_projection_items: usize,
     pub max_event_batch_items: usize,
 }
 
 impl Default for RuntimeLimits {
     fn default() -> Self {
         Self {
-            max_transcript_projection_items: 256,
             max_event_batch_items: 256,
         }
     }

crates/worker-runtime/src/observation.rs

@@ -1,49 +1,6 @@
 use crate::identity::{RuntimeId, WorkerRef};
 use serde::{Deserialize, Serialize};
 
-/// Transcript role used by bounded projection.
-#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "snake_case")]
-pub enum TranscriptRole {
-    User,
-    Assistant,
-    System,
-}
-
-/// One projected transcript item.
-#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub struct TranscriptEntry {
-    pub sequence: u64,
-    pub worker_ref: WorkerRef,
-    pub role: TranscriptRole,
-    pub content: String,
-    pub event_id: u64,
-}
-
-/// Bounded transcript query.
-#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub struct TranscriptQuery {
-    pub start: usize,
-    pub limit: usize,
-}
-
-impl TranscriptQuery {
-    pub fn new(start: usize, limit: usize) -> Self {
-        Self { start, limit }
-    }
-}
-
-/// Bounded transcript projection response.
-#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
-pub struct TranscriptProjection {
-    pub worker_ref: WorkerRef,
-    pub start: usize,
-    pub limit: usize,
-    pub total_items: usize,
-    pub items: Vec<TranscriptEntry>,
-    pub next_start: Option<usize>,
-}
-
 /// Event cursor.  `next_event_id` is the first event id that should be returned
 /// by the next poll.
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]

crates/worker-runtime/src/runtime.rs

@@ -28,7 +28,7 @@ use crate::management::{
 };
 use crate::observation::{
     EventCursor, EventSubscription, EventSubscriptionMode, RuntimeEvent, RuntimeEventBatch,
-    RuntimeEventKind, TranscriptEntry, TranscriptProjection, TranscriptQuery, TranscriptRole,
+    RuntimeEventKind,
 };
 #[cfg(feature = "ws-server")]
 use crate::observation::{WorkerObservationCursor, WorkerObservationEvent};
@@ -333,19 +333,6 @@ impl Runtime {
                 format!("worker {worker_id} created"),
             );
 
-            let mut transcript = Vec::new();
-            let mut next_transcript_sequence = 1;
-            if let Some(input) = request.initial_input.clone() {
-                transcript.push(TranscriptEntry {
-                    sequence: next_transcript_sequence,
-                    worker_ref: worker_ref.clone(),
-                    role: TranscriptRole::User,
-                    content: input.content,
-                    event_id,
-                });
-                next_transcript_sequence += 1;
-            }
-
             let record = WorkerRecord {
                 worker_ref: worker_ref.clone(),
                 worker_id: worker_id.clone(),
@@ -353,8 +340,6 @@ impl Runtime {
                 request: request.clone(),
                 execution: WorkerExecutionStatus::unconnected(),
                 execution_handle: None,
-                transcript,
-                next_transcript_sequence,
                 last_event_id: event_id,
             };
             state.workers.insert(worker_id, record);
@@ -392,7 +377,7 @@ impl Runtime {
             let state = self.lock()?;
             state.worker(&worker_ref)?.request.initial_input.clone()
         } {
-            let dispatch_result = backend.dispatch_input(&handle, initial_input);
+            let dispatch_result = backend.dispatch_input(&handle, initial_input.clone());
             if !dispatch_result.is_accepted() {
                 let _ = backend.stop_worker(&handle);
                 self.rollback_failed_create(&worker_ref)?;
@@ -404,7 +389,7 @@ impl Runtime {
                     result: dispatch_result,
                 });
             }
-            self.commit_created_worker(
+            let detail = self.commit_created_worker(
                 &worker_ref,
                 handle,
                 WorkerExecutionRunState::Busy,
@@ -413,7 +398,9 @@ impl Runtime {
                     WorkerExecutionOperation::Input,
                     WorkerExecutionRunState::Busy,
                 ),
-            )
+            )?;
+            self.record_input_observation(&worker_ref, initial_input)?;
+            Ok(detail)
         } else {
             self.commit_created_worker(
                 &worker_ref,
@@ -442,7 +429,7 @@ impl Runtime {
         Ok(worker.detail(&state.runtime_id))
     }
 
-    /// Accept input into a Worker transcript.
+    /// Accept input into a Worker.
     pub fn send_input(
         &self,
         worker_ref: &WorkerRef,
@@ -502,14 +489,6 @@ impl Runtime {
             "worker input accepted",
         );
         let worker = state.worker_mut(worker_ref)?;
-
-        let input_content = input.content;
-        let role = match input.kind {
-            WorkerInputKind::User => TranscriptRole::User,
-            WorkerInputKind::System => TranscriptRole::System,
-        };
-        let transcript_sequence = worker.next_transcript_sequence;
-        worker.next_transcript_sequence += 1;
         worker.last_event_id = event_id;
         worker.execution = WorkerExecutionStatus {
             backend: WorkerExecutionBackendKind::Connected,
@@ -518,44 +497,24 @@ impl Runtime {
             working_directory: worker.execution.working_directory.clone(),
             last_result: Some(dispatch_result),
         };
-        worker.transcript.push(TranscriptEntry {
-            sequence: transcript_sequence,
-            worker_ref: worker_ref.clone(),
-            role,
-            content: input_content.clone(),
-            event_id,
-        });
 
         let status = worker.status;
         #[cfg(feature = "ws-server")]
-        {
-            let payload = match role {
-                TranscriptRole::User => protocol::Event::UserMessage {
-                    segments: vec![protocol::Segment::Text {
-                        content: input_content.clone(),
-                    }],
-                },
-                TranscriptRole::Assistant => protocol::Event::TextDone {
-                    text: input_content.clone(),
-                },
-                TranscriptRole::System => protocol::Event::SystemItem {
-                    item: serde_json::json!({
-                        "kind": "embedded_worker_system_input",
-                        "content": input_content.clone(),
-                    }),
-                },
+        let observation = {
+            let payload = input_protocol_event(&input);
+            Some(state.push_worker_observation_event(worker_ref.clone(), payload))
         };
-            state.push_worker_observation_event(worker_ref.clone(), payload);
-        }
         state.persist_runtime_snapshot()?;
         state.persist_worker(&worker_ref.worker_id)?;
         state.persist_event_by_id(event_id)?;
-        state.persist_transcript_entry(&worker_ref.worker_id, transcript_sequence)?;
+        #[cfg(feature = "ws-server")]
+        if let Some(observation) = observation.as_ref() {
+            state.persist_worker_observation_event(observation)?;
+        }
 
         Ok(WorkerInteractionAck {
             worker_ref: worker_ref.clone(),
             status,
-            transcript_sequence,
             event_id,
         })
     }
@@ -583,10 +542,6 @@ impl Runtime {
         };
         state.persist_runtime_snapshot()?;
         state.persist_worker(&worker_ref.worker_id)?;
-        let worker = state.worker(worker_ref)?;
-        for entry in &worker.transcript {
-            state.persist_transcript_entry(&worker_ref.worker_id, entry.sequence)?;
-        }
         state.persist_event_by_id(detail.last_event_id)?;
         Ok(detail)
     }
@@ -691,38 +646,6 @@ impl Runtime {
         )
     }
 
-    /// Bounded transcript projection for a Worker.
-    pub fn transcript_projection(
-        &self,
-        worker_ref: &WorkerRef,
-        query: TranscriptQuery,
-    ) -> Result<TranscriptProjection, RuntimeError> {
-        let state = self.lock()?;
-        if query.limit > state.limits.max_transcript_projection_items {
-            return Err(RuntimeError::LimitTooLarge {
-                requested: query.limit,
-                max: state.limits.max_transcript_projection_items,
-            });
-        }
-        let worker = state.worker(worker_ref)?;
-        let total_items = worker.transcript.len();
-        let end = query.start.saturating_add(query.limit).min(total_items);
-        let items = if query.start >= total_items {
-            Vec::new()
-        } else {
-            worker.transcript[query.start..end].to_vec()
-        };
-        let next_start = (end < total_items).then_some(end);
-        Ok(TranscriptProjection {
-            worker_ref: worker_ref.clone(),
-            start: query.start,
-            limit: query.limit,
-            total_items,
-            items,
-            next_start,
-        })
-    }
-
     /// Cursor pointing to the beginning of Runtime events.
     pub fn event_cursor_from_start(&self) -> Result<EventCursor, RuntimeError> {
         let state = self.lock()?;
@@ -880,16 +803,13 @@ impl Runtime {
     ) -> Result<WorkerObservationEvent, RuntimeError> {
         let mut state = self.lock()?;
         state.ensure_worker_ref(worker_ref)?;
-        let transcript_sequence = state.project_protocol_event_to_transcript(worker_ref, &payload);
         let execution_state_changed =
             state.project_protocol_event_to_execution(worker_ref, &payload);
         let event = state.push_worker_observation_event(worker_ref.clone(), payload);
-        if transcript_sequence.is_some() || execution_state_changed {
+        if execution_state_changed {
             state.persist_worker(&worker_ref.worker_id)?;
         }
-        if let Some(sequence) = transcript_sequence {
-            state.persist_transcript_entry(&worker_ref.worker_id, sequence)?;
-        }
+        state.persist_worker_observation_event(&event)?;
         Ok(event)
     }
 
@@ -898,6 +818,29 @@ impl Runtime {
         Ok(self.lock()?.diagnostics.clone())
     }
 
+    #[cfg(feature = "ws-server")]
+    fn record_input_observation(
+        &self,
+        worker_ref: &WorkerRef,
+        input: WorkerInput,
+    ) -> Result<(), RuntimeError> {
+        let mut state = self.lock()?;
+        state.ensure_worker_ref(worker_ref)?;
+        let event =
+            state.push_worker_observation_event(worker_ref.clone(), input_protocol_event(&input));
+        state.persist_worker_observation_event(&event)?;
+        Ok(())
+    }
+
+    #[cfg(not(feature = "ws-server"))]
+    fn record_input_observation(
+        &self,
+        _worker_ref: &WorkerRef,
+        _input: WorkerInput,
+    ) -> Result<(), RuntimeError> {
+        Ok(())
+    }
+
     fn transition_worker(
         &self,
         worker_ref: &WorkerRef,
@@ -1106,13 +1049,22 @@ impl RuntimeState {
                     request: worker.request,
                     execution,
                     execution_handle: None,
-                    transcript: worker.transcript,
-                    next_transcript_sequence: worker.next_transcript_sequence,
                     last_event_id: worker.last_event_id,
                 },
             );
         }
 
+        #[cfg(feature = "ws-server")]
+        let next_observation_sequence = persisted
+            .observation_events
+            .iter()
+            .map(|event| event.sequence)
+            .max()
+            .map(|sequence| sequence.saturating_add(1))
+            .unwrap_or(1);
+        #[cfg(feature = "ws-server")]
+        let observation_events = persisted.observation_events.into_iter().collect();
+
         Ok(Self {
             runtime_id: persisted.runtime_id,
             display_name: persisted.display_name,
@@ -1129,9 +1081,9 @@ impl RuntimeState {
             events: persisted.events,
             diagnostics,
             #[cfg(feature = "ws-server")]
-            next_observation_sequence: 1,
+            next_observation_sequence,
             #[cfg(feature = "ws-server")]
-            observation_events: VecDeque::new(),
+            observation_events,
             #[cfg(feature = "ws-server")]
             observation_tx: broadcast::channel(256).0,
         })
@@ -1154,6 +1106,8 @@ impl RuntimeState {
                 .collect(),
             config_bundles: self.config_bundles.clone(),
             events: self.events.clone(),
+            #[cfg(feature = "ws-server")]
+            observation_events: Vec::new(),
             diagnostics: self.diagnostics.clone(),
         }
     }
@@ -1206,36 +1160,25 @@ impl RuntimeState {
         Ok(())
     }
 
-    #[cfg(feature = "fs-store")]
-    fn persist_transcript_entry(
+    #[cfg(all(feature = "fs-store", feature = "ws-server"))]
+    fn persist_worker_observation_event(
         &self,
-        worker_id: &WorkerId,
-        sequence: u64,
+        event: &WorkerObservationEvent,
     ) -> Result<(), RuntimeError> {
         if let Some(store) = self.fs_store() {
-            let worker =
-                self.workers
-                    .get(worker_id)
-                    .ok_or_else(|| RuntimeError::WorkerNotFound {
-                        runtime_id: self.runtime_id.clone(),
-                        worker_id: worker_id.clone(),
-                    })?;
-            let entry = worker
-                .transcript
-                .iter()
-                .find(|entry| entry.sequence == sequence)
-                .ok_or_else(|| RuntimeError::StoreCorrupt {
-                    operation: "persist transcript",
-                    path: store.runtime_dir().to_path_buf(),
-                    message: format!(
-                        "transcript sequence {sequence} is missing from worker {worker_id}"
-                    ),
-                })?;
-            store.append_transcript_entry(entry)?;
+            store.append_worker_observation_event(event)?;
         }
         Ok(())
     }
 
+    #[cfg(all(not(feature = "fs-store"), feature = "ws-server"))]
+    fn persist_worker_observation_event(
+        &self,
+        _event: &WorkerObservationEvent,
+    ) -> Result<(), RuntimeError> {
+        Ok(())
+    }
+
     #[cfg(feature = "fs-store")]
     fn persist_workers(&self) -> Result<(), RuntimeError> {
         if self.fs_store().is_some() {
@@ -1261,15 +1204,6 @@ impl RuntimeState {
         Ok(())
     }
 
-    #[cfg(not(feature = "fs-store"))]
-    fn persist_transcript_entry(
-        &self,
-        _worker_id: &WorkerId,
-        _sequence: u64,
-    ) -> Result<(), RuntimeError> {
-        Ok(())
-    }
-
     #[cfg(not(feature = "fs-store"))]
     fn persist_workers(&self) -> Result<(), RuntimeError> {
         Ok(())
@@ -1421,66 +1355,6 @@ impl RuntimeState {
         event
     }
 
-    #[cfg(feature = "ws-server")]
-    fn append_worker_transcript_entry(
-        &mut self,
-        worker_ref: &WorkerRef,
-        role: TranscriptRole,
-        content: impl Into<String>,
-    ) -> Option<u64> {
-        let content = content.into();
-        if content.trim().is_empty() {
-            return None;
-        }
-        let event_id = self.last_event_id();
-        let worker = self.workers.get_mut(&worker_ref.worker_id)?;
-        let sequence = worker.next_transcript_sequence;
-        worker.next_transcript_sequence += 1;
-        worker.transcript.push(TranscriptEntry {
-            sequence,
-            worker_ref: worker_ref.clone(),
-            role,
-            content,
-            event_id,
-        });
-        Some(sequence)
-    }
-
-    #[cfg(feature = "ws-server")]
-    fn project_protocol_event_to_transcript(
-        &mut self,
-        worker_ref: &WorkerRef,
-        event: &protocol::Event,
-    ) -> Option<u64> {
-        match event {
-            protocol::Event::TextDone { text, .. } => self.append_worker_transcript_entry(
-                worker_ref,
-                TranscriptRole::Assistant,
-                text.clone(),
-            ),
-            protocol::Event::Error { message, .. } => self.append_worker_transcript_entry(
-                worker_ref,
-                TranscriptRole::System,
-                format!("error: {message}"),
-            ),
-            protocol::Event::ToolResult {
-                id,
-                summary,
-                is_error,
-                ..
-            } => self.append_worker_transcript_entry(
-                worker_ref,
-                TranscriptRole::System,
-                format!(
-                    "tool result {id}: {}{}",
-                    if *is_error { "error: " } else { "" },
-                    summary
-                ),
-            ),
-            _ => None,
-        }
-    }
-
     #[cfg(feature = "ws-server")]
     fn project_protocol_event_to_execution(
         &mut self,
@@ -1535,8 +1409,6 @@ struct WorkerRecord {
     request: CreateWorkerRequest,
     execution: WorkerExecutionStatus,
     execution_handle: Option<WorkerExecutionHandle>,
-    transcript: Vec<TranscriptEntry>,
-    next_transcript_sequence: u64,
     last_event_id: u64,
 }
 
@@ -1551,7 +1423,6 @@ impl WorkerRecord {
             profile: self.request.profile.clone(),
             profile_source: self.request.profile_source.reference(),
             config_bundle: self.request.config_bundle.clone(),
-            transcript_len: self.transcript.len(),
             last_event_id: self.last_event_id,
         }
     }
@@ -1566,7 +1437,6 @@ impl WorkerRecord {
             profile: self.request.profile.clone(),
             profile_source: self.request.profile_source.reference(),
             config_bundle: self.request.config_bundle.clone(),
-            transcript_len: self.transcript.len(),
             last_event_id: self.last_event_id,
         }
     }
@@ -1579,8 +1449,6 @@ impl WorkerRecord {
             status: self.status,
             request: self.request.clone(),
             execution: self.execution.clone(),
-            transcript: self.transcript.clone(),
-            next_transcript_sequence: self.next_transcript_sequence,
             last_event_id: self.last_event_id,
         }
     }
@@ -1630,6 +1498,23 @@ fn validate_worker_input(input: &WorkerInput) -> Result<(), RuntimeError> {
     Ok(())
 }
 
+#[cfg(feature = "ws-server")]
+fn input_protocol_event(input: &WorkerInput) -> protocol::Event {
+    match input.kind {
+        WorkerInputKind::User => protocol::Event::UserMessage {
+            segments: vec![protocol::Segment::Text {
+                content: input.content.clone(),
+            }],
+        },
+        WorkerInputKind::System => protocol::Event::SystemItem {
+            item: serde_json::json!({
+                "kind": "embedded_worker_system_input",
+                "content": input.content.clone(),
+            }),
+        },
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -1965,12 +1850,12 @@ mod tests {
         ));
         let refreshed = runtime.worker_detail(&detail.worker_ref).unwrap();
         assert_eq!(refreshed.execution.run_state, WorkerExecutionRunState::Busy);
-        assert_eq!(
+        #[cfg(feature = "ws-server")]
+        assert!(
             runtime
-                .transcript_projection(&detail.worker_ref, TranscriptQuery::new(0, 1))
+                .read_worker_observation_events(&detail.worker_ref, WorkerObservationCursor::zero())
                 .unwrap()
-                .total_items,
-            0
+                .is_empty()
         );
     }
 
@@ -2049,12 +1934,12 @@ mod tests {
         );
     }
 
+    #[cfg(feature = "ws-server")]
     #[test]
-    fn send_input_and_project_bounded_transcript() {
+    fn send_input_records_protocol_observations() {
         let runtime = Runtime::with_execution_backend(
             RuntimeOptions {
                 limits: RuntimeLimits {
-                    max_transcript_projection_items: 2,
                     max_event_batch_items: 16,
                 },
                 ..RuntimeOptions::default()
@@ -2068,27 +1953,23 @@ mod tests {
         let first = runtime
             .send_input(&detail.worker_ref, WorkerInput::user("hello"))
             .unwrap();
-        assert_eq!(first.transcript_sequence, 1);
         runtime
             .send_input(&detail.worker_ref, WorkerInput::system("note"))
             .unwrap();
-        runtime
-            .send_input(&detail.worker_ref, WorkerInput::user("again"))
-            .unwrap();
 
-        let projection = runtime
-            .transcript_projection(&detail.worker_ref, TranscriptQuery::new(0, 2))
+        let observations = runtime
+            .read_worker_observation_events(&detail.worker_ref, WorkerObservationCursor::zero())
             .unwrap();
-        assert_eq!(projection.total_items, 3);
-        assert_eq!(projection.items.len(), 2);
-        assert_eq!(projection.items[0].content, "hello");
-        assert_eq!(projection.items[1].role, TranscriptRole::System);
-        assert_eq!(projection.next_start, Some(2));
-
-        let err = runtime
-            .transcript_projection(&detail.worker_ref, TranscriptQuery::new(0, 3))
-            .unwrap_err();
-        assert!(matches!(err, RuntimeError::LimitTooLarge { .. }));
+        assert_eq!(first.event_id, 3);
+        assert_eq!(observations.len(), 2);
+        assert!(matches!(
+            observations[0].payload,
+            protocol::Event::UserMessage { .. }
+        ));
+        assert!(matches!(
+            observations[1].payload,
+            protocol::Event::SystemItem { .. }
+        ));
     }
 
     #[test]
@@ -2253,7 +2134,7 @@ mod tests {
 
     #[cfg(feature = "fs-store")]
     #[test]
-    fn fs_store_restores_workers_events_and_transcripts() {
+    fn fs_store_restores_workers_events_and_protocol_observations() {
         let root = fs_store_root("restore");
         let runtime_id = RuntimeId::new("runtime-fs-authority").unwrap();
         let runtime = Runtime::with_fs_store_and_execution_backend(
@@ -2262,7 +2143,6 @@ mod tests {
                 runtime_id: Some(runtime_id.clone()),
                 display_name: Some("filesystem runtime".to_string()),
                 limits: RuntimeLimits {
-                    max_transcript_projection_items: 2,
                     max_event_batch_items: 2,
                 },
             },
@@ -2319,14 +2199,21 @@ mod tests {
                         && diagnostic.worker_ref.as_ref() == Some(&worker.worker_ref)
                 )
         );
-        assert_eq!(restored_worker.transcript_len, 2);
-
-        let projection = restored
-            .transcript_projection(&worker.worker_ref, TranscriptQuery::new(0, 1))
+        #[cfg(feature = "ws-server")]
+        {
+            let observations = restored
+                .read_worker_observation_events(&worker.worker_ref, WorkerObservationCursor::zero())
                 .unwrap();
-        assert_eq!(projection.total_items, 2);
-        assert_eq!(projection.items[0].content, "first");
-        assert_eq!(projection.next_start, Some(1));
+            assert_eq!(observations.len(), 2);
+            assert!(matches!(
+                observations[0].payload,
+                protocol::Event::UserMessage { .. }
+            ));
+            assert!(matches!(
+                observations[1].payload,
+                protocol::Event::SystemItem { .. }
+            ));
+        }
 
         let cursor = restored.event_cursor_from_start().unwrap();
         let batch = restored.read_events(&cursor, 2).unwrap();
@@ -2337,11 +2224,6 @@ mod tests {
 
         let direct_events = store.read_events(&cursor, 2, 2).unwrap();
         assert_eq!(direct_events.events, batch.events);
-        let direct_transcript = store
-            .read_transcript(&worker.worker_ref, TranscriptQuery::new(1, 1), 2)
-            .unwrap();
-        assert_eq!(direct_transcript.items[0].content, "second");
-
         #[cfg(feature = "ws-server")]
         {
             let observation = restored
@@ -2352,12 +2234,12 @@ mod tests {
                     },
                 )
                 .unwrap();
-            assert_eq!(observation.sequence, 1);
+            assert_eq!(observation.sequence, 3);
             let observations = restored
                 .read_worker_observation_events(&worker.worker_ref, WorkerObservationCursor::zero())
                 .unwrap();
-            assert_eq!(observations.len(), 1);
-            assert_eq!(observations[0].cursor, observation.cursor);
+            assert_eq!(observations.len(), 3);
+            assert_eq!(observations[2].cursor, observation.cursor);
         }
 
         let _ = std::fs::remove_dir_all(root);

crates/worker-runtime/src/worker_backend.rs

@@ -820,7 +820,7 @@ mod tests {
     use crate::execution::WorkerExecutionContext;
     use crate::identity::RuntimeId;
     use crate::management::RuntimeOptions;
-    use crate::observation::{TranscriptQuery, TranscriptRole};
+    use crate::observation::WorkerObservationCursor;
     use crate::working_directory::LocalGitWorktreeMaterializer;
     use async_trait::async_trait;
     use futures::Stream;
@@ -1128,27 +1128,27 @@ mod tests {
 
         let deadline = std::time::Instant::now() + Duration::from_secs(5);
         loop {
-            let projection = runtime
-                .transcript_projection(&detail.worker_ref, TranscriptQuery::new(0, 10))
+            let observations = runtime
+                .read_worker_observation_events(&detail.worker_ref, WorkerObservationCursor::zero())
                 .unwrap();
-            if projection.items.iter().any(|item| {
-                item.role == TranscriptRole::Assistant && item.content == "hello from worker"
+            if observations.iter().any(|event| {
+                matches!(
+                    &event.payload,
+                    protocol::Event::TextDone { text } if text == "hello from worker"
+                )
             }) {
                 break;
             }
             assert!(
                 std::time::Instant::now() < deadline,
-                "timed out waiting for assistant transcript projection"
+                "timed out waiting for assistant protocol observation"
             );
             std::thread::sleep(Duration::from_millis(20));
         }
 
         assert_eq!(client.captured.lock().unwrap().len(), 1);
         let observations = runtime
-            .read_worker_observation_events(
-                &detail.worker_ref,
-                crate::observation::WorkerObservationCursor::zero(),
-            )
+            .read_worker_observation_events(&detail.worker_ref, WorkerObservationCursor::zero())
             .unwrap();
         assert!(
             observations

crates/workspace-server/src/hosts.rs

@@ -19,9 +19,10 @@ use worker_runtime::catalog::{
     WorkerStatus as EmbeddedWorkerStatus, WorkingDirectoryClaim, WorkingDirectoryRequest,
     WorkingDirectoryStatus, WorkingDirectorySummary,
 };
+use worker_runtime::config_bundle::{ConfigBundle, ConfigBundleAvailability, ConfigBundleSummary};
+#[cfg(test)]
 use worker_runtime::config_bundle::{
-    ConfigBundle, ConfigBundleAvailability, ConfigBundleMetadata, ConfigBundleProvenance,
-    ConfigBundleSummary, ConfigProfileDescriptor,
+    ConfigBundleMetadata, ConfigBundleProvenance, ConfigProfileDescriptor,
 };
 use worker_runtime::error::RuntimeError as EmbeddedRuntimeError;
 use worker_runtime::execution::{
@@ -30,10 +31,10 @@ use worker_runtime::execution::{
 use worker_runtime::fs_store::FsRuntimeStoreOptions;
 use worker_runtime::http_server::{
     RuntimeHttpConfigBundleAvailabilityResponse, RuntimeHttpConfigBundleSyncRequest,
-    RuntimeHttpErrorResponse, RuntimeHttpSummaryResponse, RuntimeHttpTranscriptResponse,
-    RuntimeHttpWorkerInputResponse, RuntimeHttpWorkerLifecycleRequest,
-    RuntimeHttpWorkerLifecycleResponse, RuntimeHttpWorkerResponse, RuntimeHttpWorkersResponse,
-    RuntimeHttpWorkingDirectoriesResponse, RuntimeHttpWorkingDirectoryResponse,
+    RuntimeHttpErrorResponse, RuntimeHttpSummaryResponse, RuntimeHttpWorkerInputResponse,
+    RuntimeHttpWorkerLifecycleRequest, RuntimeHttpWorkerLifecycleResponse,
+    RuntimeHttpWorkerResponse, RuntimeHttpWorkersResponse, RuntimeHttpWorkingDirectoriesResponse,
+    RuntimeHttpWorkingDirectoryResponse,
 };
 use worker_runtime::identity::{
     RuntimeId as EmbeddedRuntimeId, WorkerId as EmbeddedWorkerId, WorkerRef as EmbeddedWorkerRef,
@@ -42,9 +43,6 @@ use worker_runtime::interaction::{
     WorkerInput as EmbeddedWorkerInput, WorkerInputKind as EmbeddedWorkerInputKind,
 };
 use worker_runtime::management::{RuntimeOptions as EmbeddedRuntimeOptions, RuntimeStatus};
-use worker_runtime::observation::{
-    TranscriptProjection as EmbeddedTranscriptProjection, TranscriptQuery, TranscriptRole,
-};
 use worker_runtime::profile_archive::{ProfileSourceArchive, ProfileSourceArchiveInput};
 
 const EMBEDDED_RUNTIME_ID: &str = "embedded-worker-runtime";
@@ -454,34 +452,10 @@ pub struct WorkerInputResult {
     pub runtime_id: String,
     pub worker_id: String,
     #[serde(skip_serializing_if = "Option::is_none")]
-    pub transcript_sequence: Option<u64>,
-    #[serde(skip_serializing_if = "Option::is_none")]
     pub event_id: Option<u64>,
     pub diagnostics: Vec<RuntimeDiagnostic>,
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
-pub struct WorkerTranscriptItem {
-    pub sequence: u64,
-    pub role: String,
-    pub content: String,
-    pub event_id: u64,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
-pub struct WorkerTranscriptProjection {
-    pub state: WorkerOperationState,
-    pub runtime_id: String,
-    pub worker_id: String,
-    pub start: usize,
-    pub limit: usize,
-    pub total_items: usize,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub next_start: Option<usize>,
-    pub items: Vec<WorkerTranscriptItem>,
-    pub diagnostics: Vec<RuntimeDiagnostic>,
-}
-
 #[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
 pub struct WorkerProxyConnectPoint {
     pub kind: String,
@@ -705,7 +679,6 @@ pub trait WorkspaceWorkerRuntime: Send + Sync {
             state: WorkerOperationState::Unsupported,
             runtime_id: self.runtime_id().to_string(),
             worker_id: worker_id.to_string(),
-            transcript_sequence: None,
             event_id: None,
             diagnostics: vec![diagnostic(
                 "worker_input_pending",
@@ -717,31 +690,6 @@ pub trait WorkspaceWorkerRuntime: Send + Sync {
         }
     }
 
-    fn transcript(
-        &self,
-        worker_id: &str,
-        start: usize,
-        limit: usize,
-    ) -> WorkerTranscriptProjection {
-        WorkerTranscriptProjection {
-            state: WorkerOperationState::Unsupported,
-            runtime_id: self.runtime_id().to_string(),
-            worker_id: worker_id.to_string(),
-            start,
-            limit,
-            total_items: 0,
-            next_start: None,
-            items: Vec::new(),
-            diagnostics: vec![diagnostic(
-                "worker_transcript_pending",
-                DiagnosticSeverity::Info,
-                format!(
-                    "bounded transcript for '{worker_id}' is not implemented by this registry source"
-                ),
-            )],
-        }
-    }
-
     fn proxy_connect_points(&self, worker_id: &str) -> Vec<WorkerProxyConnectPoint> {
         vec![WorkerProxyConnectPoint {
             kind: "stream_proxy".to_string(),
@@ -1050,27 +998,6 @@ impl RuntimeRegistry {
         Ok(runtime.send_input(worker_id, request))
     }
 
-    pub fn transcript(
-        &self,
-        runtime_id: &str,
-        worker_id: &str,
-        start: usize,
-        limit: usize,
-    ) -> Result<WorkerTranscriptProjection, RuntimeRegistryError> {
-        validate_backend_identifier("runtime_id", runtime_id)?;
-        validate_backend_identifier("worker_id", worker_id)?;
-        let runtime = self.runtime(runtime_id)?;
-        let lookup = runtime.worker(worker_id);
-        if lookup.worker.is_none() {
-            return Err(operation_failed_or_unknown_worker(
-                runtime_id,
-                worker_id,
-                lookup.diagnostics,
-            ));
-        }
-        Ok(runtime.transcript(worker_id, start, limit))
-    }
-
     pub fn stop_worker(
         &self,
         runtime_id: &str,
@@ -1781,7 +1708,6 @@ impl WorkspaceWorkerRuntime for EmbeddedWorkerRuntime {
                 state: WorkerOperationState::Accepted,
                 runtime_id: self.runtime_id.clone(),
                 worker_id: worker_id.to_string(),
-                transcript_sequence: Some(ack.transcript_sequence),
                 event_id: Some(ack.event_id),
                 diagnostics: Vec::new(),
             },
@@ -1792,42 +1718,6 @@ impl WorkspaceWorkerRuntime for EmbeddedWorkerRuntime {
             ),
         }
     }
-
-    fn transcript(
-        &self,
-        worker_id: &str,
-        start: usize,
-        limit: usize,
-    ) -> WorkerTranscriptProjection {
-        let Some(worker_ref) = self.worker_ref(worker_id) else {
-            return embedded_transcript_rejected(
-                &self.runtime_id,
-                worker_id,
-                start,
-                limit,
-                diagnostic(
-                    "embedded_worker_id_invalid",
-                    DiagnosticSeverity::Warning,
-                    "Worker id was empty and cannot be resolved".to_string(),
-                ),
-            );
-        };
-        match self
-            .runtime
-            .transcript_projection(&worker_ref, TranscriptQuery::new(start, limit))
-        {
-            Ok(projection) => {
-                embedded_transcript_projection(&self.runtime_id, worker_id, projection)
-            }
-            Err(err) => embedded_transcript_rejected(
-                &self.runtime_id,
-                worker_id,
-                start,
-                limit,
-                embedded_runtime_diagnostic(&err),
-            ),
-        }
-    }
 }
 
 #[derive(Clone)]
@@ -2444,31 +2334,12 @@ impl WorkspaceWorkerRuntime for RemoteWorkerRuntime {
                 state: WorkerOperationState::Accepted,
                 runtime_id: self.runtime_id.clone(),
                 worker_id: worker_id.to_string(),
-                transcript_sequence: Some(response.ack.transcript_sequence),
                 event_id: Some(response.ack.event_id),
                 diagnostics: Vec::new(),
             },
             Err(diagnostic) => remote_input_rejected(&self.runtime_id, worker_id, diagnostic),
         }
     }
-
-    fn transcript(
-        &self,
-        worker_id: &str,
-        start: usize,
-        limit: usize,
-    ) -> WorkerTranscriptProjection {
-        match self.get_json::<RuntimeHttpTranscriptResponse>(&format!(
-            "/v1/workers/{worker_id}/transcript?start={start}&limit={limit}"
-        )) {
-            Ok(response) => {
-                embedded_transcript_projection(&self.runtime_id, worker_id, response.transcript)
-            }
-            Err(diagnostic) => {
-                embedded_transcript_rejected(&self.runtime_id, worker_id, start, limit, diagnostic)
-            }
-        }
-    }
 }
 
 fn embedded_runtime_capabilities(
@@ -2676,12 +2547,14 @@ fn default_profile_source_archive_http_source(
     })
 }
 
+#[cfg(test)]
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 enum ProfileSourceArchiveTransport {
     Inline,
     BackendResourceHandle,
 }
 
+#[cfg(test)]
 fn default_embedded_config_bundle(
     profile: &ProfileSelector,
     workspace_id: &str,
@@ -2844,7 +2717,6 @@ fn embedded_input_rejected(
         state: WorkerOperationState::Rejected,
         runtime_id: runtime_id.to_string(),
         worker_id: worker_id.to_string(),
-        transcript_sequence: None,
         event_id: None,
         diagnostics: vec![diagnostic],
     }
@@ -2859,7 +2731,6 @@ fn remote_input_rejected(
         state: WorkerOperationState::Rejected,
         runtime_id: runtime_id.to_string(),
         worker_id: worker_id.to_string(),
-        transcript_sequence: None,
         event_id: None,
         diagnostics: vec![diagnostic],
     }
@@ -2893,61 +2764,6 @@ fn remote_lifecycle_rejected(
     }
 }
 
-fn embedded_transcript_projection(
-    runtime_id: &str,
-    worker_id: &str,
-    projection: EmbeddedTranscriptProjection,
-) -> WorkerTranscriptProjection {
-    WorkerTranscriptProjection {
-        state: WorkerOperationState::Accepted,
-        runtime_id: runtime_id.to_string(),
-        worker_id: worker_id.to_string(),
-        start: projection.start,
-        limit: projection.limit,
-        total_items: projection.total_items,
-        next_start: projection.next_start,
-        items: projection
-            .items
-            .into_iter()
-            .map(|item| WorkerTranscriptItem {
-                sequence: item.sequence,
-                role: embedded_transcript_role_label(item.role).to_string(),
-                content: item.content,
-                event_id: item.event_id,
-            })
-            .collect(),
-        diagnostics: Vec::new(),
-    }
-}
-
-fn embedded_transcript_rejected(
-    runtime_id: &str,
-    worker_id: &str,
-    start: usize,
-    limit: usize,
-    diagnostic: RuntimeDiagnostic,
-) -> WorkerTranscriptProjection {
-    WorkerTranscriptProjection {
-        state: WorkerOperationState::Rejected,
-        runtime_id: runtime_id.to_string(),
-        worker_id: worker_id.to_string(),
-        start,
-        limit,
-        total_items: 0,
-        next_start: None,
-        items: Vec::new(),
-        diagnostics: vec![diagnostic],
-    }
-}
-
-fn embedded_transcript_role_label(role: TranscriptRole) -> &'static str {
-    match role {
-        TranscriptRole::User => "user",
-        TranscriptRole::Assistant => "assistant",
-        TranscriptRole::System => "system",
-    }
-}
-
 fn embedded_runtime_diagnostic(error: &EmbeddedRuntimeError) -> RuntimeDiagnostic {
     match error {
         EmbeddedRuntimeError::RuntimeStopped { .. } => diagnostic(
@@ -3814,7 +3630,7 @@ mod tests {
     }
 
     #[test]
-    fn embedded_runtime_with_execution_backend_routes_input_and_projects_transcript() {
+    fn embedded_runtime_with_execution_backend_routes_input_and_updates_status() {
         let runtime = EmbeddedWorkerRuntime::new_memory_with_execution_backend(
             "local:test",
             Arc::new(AcceptingExecutionBackend::default()),
@@ -3841,13 +3657,7 @@ mod tests {
                 .worker(&worker.worker_id)
                 .worker
                 .expect("worker detail");
-            let transcript = runtime.transcript(&worker.worker_id, 0, 10);
-            if detail.status == "idle"
-                && transcript
-                    .items
-                    .iter()
-                    .any(|entry| entry.role == "assistant" && entry.content == "echo: hello")
-            {
+            if detail.status == "idle" {
                 assert!(detail.capabilities.can_accept_input);
                 break;
             }
@@ -3860,7 +3670,7 @@ mod tests {
     }
 
     #[test]
-    fn embedded_runtime_registers_routes_input_and_transcript_without_internal_leaks() {
+    fn embedded_runtime_registers_routes_input_without_internal_leaks() {
         let registry = RuntimeRegistry::for_workspace(
             EmbeddedWorkerRuntime::new_memory_with_execution_backend(
                 "local:test",
@@ -3933,18 +3743,11 @@ mod tests {
         assert_eq!(input.runtime_id, EMBEDDED_RUNTIME_ID);
         assert_eq!(input.worker_id, worker.worker_id);
 
-        let transcript = registry
-            .transcript(EMBEDDED_RUNTIME_ID, &worker.worker_id, 0, 10)
+        let detail = registry
+            .worker(EMBEDDED_RUNTIME_ID, &worker.worker_id)
             .unwrap();
-        assert_eq!(transcript.state, WorkerOperationState::Accepted);
-        assert!(
-            transcript
-                .items
-                .iter()
-                .any(|entry| entry.role == "user" && entry.content == "hello embedded runtime")
-        );
 
-        let json = serde_json::to_string(&(embedded_summary, worker, transcript)).unwrap();
+        let json = serde_json::to_string(&(embedded_summary, worker, input, detail)).unwrap();
         for forbidden in [
             "/workspace/project",
             "metadata.json",
@@ -3953,6 +3756,7 @@ mod tests {
             "token",
             "credential",
             "provider",
+            "transcript",
             "can_stream_events",
             "can_read_bounded_transcript",
         ] {
@@ -4093,7 +3897,6 @@ mod tests {
                     "ack": {
                         "worker_ref": { "runtime_id": "remote:primary", "worker_id": "worker-remote-1" },
                         "status": "running",
-                        "transcript_sequence": 7,
                         "event_id": 8
                     }
                 })
@@ -4157,7 +3960,6 @@ mod tests {
             )
             .unwrap();
         assert_eq!(input.state, WorkerOperationState::Accepted);
-        assert_eq!(input.transcript_sequence, Some(7));
         assert_eq!(input.event_id, Some(8));
 
         server.join().expect("mock remote server finished");
@@ -4482,7 +4284,6 @@ mod tests {
                 "source_graph": { "source_count": 0, "total_source_bytes": 0, "entrypoints": {}, "import_count": 0 }
             },
             "config_bundle": { "id": "remote-bundle", "digest": "remote-digest" },
-            "transcript_len": 0,
             "last_event_id": 0
         })
     }

crates/workspace-server/src/server.rs

@@ -27,7 +27,7 @@ use crate::hosts::{
     RuntimeRegistryUnregisterResult, RuntimeSummary, WorkerInputRequest, WorkerInputResult,
     WorkerLifecycleRequest, WorkerLifecycleResult, WorkerOperationState,
     WorkerSpawnAcceptanceRequirement, WorkerSpawnIntent, WorkerSpawnRequest, WorkerSpawnResult,
-    WorkerSpawnWorkingDirectoryRequest, WorkerSummary, WorkerTranscriptProjection,
+    WorkerSpawnWorkingDirectoryRequest, WorkerSummary,
 };
 use crate::identity::WorkspaceIdentity;
 use crate::observation::{
@@ -492,14 +492,6 @@ pub fn build_router(api: WorkspaceApi) -> Router {
             "/api/w/{workspace_id}/runtimes/{runtime_id}/workers/{worker_id}/cancel",
             post(scoped_cancel_runtime_worker),
         )
-        .route(
-            "/api/runtimes/{runtime_id}/workers/{worker_id}/transcript",
-            get(get_runtime_worker_transcript),
-        )
-        .route(
-            "/api/w/{workspace_id}/runtimes/{runtime_id}/workers/{worker_id}/transcript",
-            get(scoped_get_runtime_worker_transcript),
-        )
         .route(
             "/api/runtimes/{runtime_id}/workers/{worker_id}/events/ws",
             get(worker_observation_ws),
@@ -1498,20 +1490,6 @@ async fn scoped_cancel_runtime_worker(
     .await
 }
 
-async fn scoped_get_runtime_worker_transcript(
-    State(api): State<WorkspaceApi>,
-    AxumPath(path): AxumPath<ScopedRuntimeWorkerPath>,
-    Query(query): Query<TranscriptQuery>,
-) -> ApiResult<Json<WorkerTranscriptProjection>> {
-    validate_workspace_scope(&api, &path.workspace_id)?;
-    get_runtime_worker_transcript(
-        State(api),
-        AxumPath((path.runtime_id, path.worker_id)),
-        Query(query),
-    )
-    .await
-}
-
 async fn scoped_worker_observation_ws(
     ws: WebSocketUpgrade,
     State(api): State<WorkspaceApi>,
@@ -2245,20 +2223,6 @@ async fn cancel_runtime_worker(
     Ok(Json(result))
 }
 
-async fn get_runtime_worker_transcript(
-    State(api): State<WorkspaceApi>,
-    AxumPath((runtime_id, worker_id)): AxumPath<(String, String)>,
-    Query(query): Query<TranscriptQuery>,
-) -> ApiResult<Json<WorkerTranscriptProjection>> {
-    let limit = query.limit.unwrap_or(api.config.max_records).min(200);
-    let start = query.start.unwrap_or(0);
-    let result = api
-        .runtime
-        .transcript(&runtime_id, &worker_id, start, limit)
-        .map_err(|err| err.into_error())?;
-    Ok(Json(result))
-}
-
 async fn worker_observation_ws(
     State(api): State<WorkspaceApi>,
     AxumPath((runtime_id, worker_id)): AxumPath<(String, String)>,
@@ -5243,8 +5207,7 @@ mod tests {
     }
 
     #[tokio::test]
-    async fn embedded_runtime_fs_store_restores_catalog_config_bundle_transcript_and_stale_execution()
-     {
+    async fn embedded_runtime_fs_store_restores_catalog_config_bundle_and_stale_execution() {
         let dir = tempfile::tempdir().unwrap();
         let config = test_server_config(dir.path().join("workspace"));
         let store_root = config.embedded_runtime_store_root.clone();
@@ -5304,24 +5267,16 @@ mod tests {
 
         let deadline = std::time::Instant::now() + std::time::Duration::from_secs(2);
         loop {
-            let transcript = api
+            let detail = api
                 .runtime
-                .transcript("embedded-worker-runtime", &worker_id, 0, 10)
-                .expect("transcript");
-            if transcript.items.iter().any(|item| {
-                item.role == "assistant" && item.content == "server companion echoed: persist me"
-            }) {
-                assert!(
-                    transcript
-                        .items
-                        .iter()
-                        .any(|item| item.role == "user" && item.content == "persist me")
-                );
+                .worker("embedded-worker-runtime", &worker_id)
+                .expect("worker detail");
+            if detail.status == "idle" {
                 break;
             }
             assert!(
                 std::time::Instant::now() < deadline,
-                "timed out waiting for deterministic transcript"
+                "timed out waiting for deterministic worker completion"
             );
             tokio::time::sleep(std::time::Duration::from_millis(10)).await;
         }
@@ -5359,20 +5314,6 @@ mod tests {
                 .any(|summary| summary.id == bundle_id)
         );
 
-        let restored_transcript = restored
-            .runtime
-            .transcript("embedded-worker-runtime", &worker_id, 0, 10)
-            .expect("restored transcript");
-        assert!(
-            restored_transcript
-                .items
-                .iter()
-                .any(|item| item.role == "user" && item.content == "persist me")
-        );
-        assert!(restored_transcript.items.iter().any(|item| {
-            item.role == "assistant" && item.content == "server companion echoed: persist me"
-        }));
-
         let rejected_input = restored
             .runtime
             .send_input(
@@ -5591,15 +5532,20 @@ mod tests {
         assert_eq!(accepted["worker_id"], worker_id);
         assert!(accepted["diagnostics"].as_array().unwrap().is_empty());
 
-        let transcript = get_json(
-            app.clone(),
-            &format!("/api/runtimes/embedded-worker-runtime/workers/{worker_id}/transcript?start=0&limit=10"),
+        let transcript_route = app
+            .clone()
+            .oneshot(
+                Request::builder()
+                    .method("GET")
+                    .uri(format!(
+                        "/api/runtimes/embedded-worker-runtime/workers/{worker_id}/transcript?start=0&limit=10"
+                    ))
+                    .body(Body::empty())
+                    .unwrap(),
             )
-        .await;
-        assert_eq!(transcript["state"], "accepted");
-        assert!(transcript["items"].as_array().unwrap().iter().any(
-            |item| item["role"] == "user" && item["content"] == "hello from browser-facing api"
-        ));
+            .await
+            .unwrap();
+        assert_eq!(transcript_route.status(), StatusCode::NOT_FOUND);
 
         let wrong_runtime = app
             .clone()
@@ -5623,10 +5569,7 @@ mod tests {
             .unwrap();
         assert_eq!(wrong_runtime.status(), StatusCode::NOT_FOUND);
 
-        let projected = format!(
-            "{}{}{}{}{}",
-            embedded_summary, spawned, worker, accepted, transcript
-        );
+        let projected = format!("{}{}{}{}", embedded_summary, spawned, worker, accepted);
         for forbidden in [
             dir.path().to_string_lossy().as_ref(),
             "metadata.json",

web/workspace/src/app.css

@@ -967,13 +967,18 @@
 }
 
 .worker-console-shell {
-    min-height: 100dvh;
-    padding-bottom: 0;
+    display: flex;
+    flex-direction: column;
+    min-height: 0;
+    height: calc(100dvh - (var(--space-6) * 2));
+    overflow: hidden;
 }
 
 .worker-console-shell > .console-body {
     flex: 1 1 auto;
     min-height: 0;
+    overflow-y: auto;
+    overscroll-behavior: contain;
 }
 
 .console-header-actions {
@@ -1018,12 +1023,10 @@
 .console-log {
     display: grid;
     align-content: start;
-    gap: var(--space-2);
-    max-height: none;
+    gap: var(--space-3);
     min-height: 0;
     margin: 0;
     padding: 0;
-    overflow-y: auto;
     list-style: none;
 }
 
@@ -1134,6 +1137,7 @@
     position: sticky;
     bottom: 0;
     z-index: 2;
+    flex: 0 0 auto;
     display: grid;
     gap: var(--space-3);
     margin-inline: calc(-1 * var(--space-6));

web/workspace/src/lib/workspace-console/model.test.ts

@@ -53,17 +53,15 @@ Deno.test("segmentsToText preserves protocol segment semantics", () => {
   );
 });
 
-Deno.test("projectConsole projects initial console output and live visible protocol rows", () => {
-  const projection = projectConsole(
-    [
+Deno.test("projectConsole projects visible protocol rows", () => {
+  const projection = projectConsole([
     {
-        sequence: 1,
-        role: "user",
-        content: "transcript input",
-        event_id: 10,
+      cursor: "10",
+      event: {
+        event: "user_message",
+        data: { segments: [{ kind: "text", content: "input" }] },
+      } satisfies Event,
     },
-    ],
-    [
     {
       cursor: "11",
       event: {
@@ -104,20 +102,15 @@ Deno.test("projectConsole projects initial console output and live visible proto
         data: { code: "invalid_request", message: "bad frame" },
       } satisfies Event,
     },
-    ],
-  );
+  ]);
 
   assert(
-    projection.lines.some((line) =>
-      line.source === "initial" && line.kind === "user"
-    ),
-    "initial user row expected",
+    projection.lines.some((line) => line.source === "event" && line.kind === "user"),
+    "user protocol row expected",
   );
   assert(
-    projection.lines.some((line) =>
-      line.source === "live" && line.kind === "assistant"
-    ),
-    "assistant live row expected",
+    projection.lines.some((line) => line.source === "event" && line.kind === "assistant"),
+    "assistant protocol row expected",
   );
   assert(
     projection.lines.some((line) => line.kind === "thinking"),
@@ -141,85 +134,25 @@ Deno.test("projectConsole projects initial console output and live visible proto
   );
 });
 
-Deno.test("projectConsole suppresses replayed live conversation rows already present in initial transcript", () => {
-  const projection = projectConsole(
-    [
-      {
-        sequence: 1,
-        role: "user",
-        content: "hello",
-        event_id: 10,
-      },
-      {
-        sequence: 2,
-        role: "assistant",
-        content: "world",
-        event_id: 11,
-      },
-    ],
-    [
-      {
-        cursor: "12",
-        event: {
-          event: "user_message",
-          data: { segments: [{ kind: "text", content: "hello" }] },
-        } satisfies Event,
-      },
-      {
-        cursor: "13",
-        event: { event: "text_delta", data: { text: "wo" } } satisfies Event,
-      },
-      {
-        cursor: "14",
-        event: { event: "text_delta", data: { text: "rld" } } satisfies Event,
-      },
-      {
-        cursor: "15",
-        event: { event: "text_done", data: { text: "world" } } satisfies Event,
-      },
-      {
-        cursor: "16",
-        event: { event: "status", data: { status: "idle" } } satisfies Event,
-      },
-    ],
-  );
-
-  assertEquals(
-    projection.lines.map((line) => `${line.source}:${line.kind}:${line.body}`),
-    ["initial:user:hello", "initial:assistant:world"],
-  );
-  assertEquals(projection.status, "idle");
-});
-
-Deno.test("projectConsole preserves live assistant stream not yet present in initial transcript", () => {
-  const projection = projectConsole(
-    [
-      {
-        sequence: 1,
-        role: "user",
-        content: "hello",
-        event_id: 10,
-      },
-    ],
-    [
+Deno.test("projectConsole preserves in-progress assistant protocol stream", () => {
+  const projection = projectConsole([
     {
       cursor: "13",
       event: { event: "text_delta", data: { text: "new" } } satisfies Event,
     },
-    ],
-  );
+  ]);
 
   assert(
     projection.lines.some((line) =>
-      line.source === "live" && line.kind === "assistant" &&
+      line.source === "event" && line.kind === "assistant" &&
       line.body === "new" && line.streaming
     ),
-    "live in-progress assistant stream should remain visible",
+    "in-progress assistant stream should remain visible",
   );
 });
 
 Deno.test("projectConsole keeps protocol lifecycle events out of the console surface", () => {
-  const projection = projectConsole([], [
+  const projection = projectConsole([
     {
       cursor: "30",
       event: { event: "status", data: { status: "running" } } satisfies Event,
@@ -250,7 +183,7 @@ Deno.test("projectConsole keeps protocol lifecycle events out of the console sur
 });
 
 Deno.test("projectConsole uses snapshot for state without rendering it as console output", () => {
-  const projection = projectConsole([], [
+  const projection = projectConsole([
     {
       cursor: "20",
       event: {
@@ -270,14 +203,7 @@ Deno.test("projectConsole uses snapshot for state without rendering it as consol
           status: "running",
           in_flight: {
             blocks: [
-              { kind: "text", text: "unfinished answer", finished: false },
-              {
-                kind: "tool_call",
-                id: "call-1",
-                name: "Read",
-                args: "{}",
-                state: "streaming_args",
-              },
+              { kind: "text", text: "partial" },
             ],
           },
         },
@@ -285,13 +211,9 @@ Deno.test("projectConsole uses snapshot for state without rendering it as consol
     },
   ]);
 
-  assert(projection.status === "running", "snapshot should update status");
-  assert(
-    !projection.lines.some((line) => line.title.includes("snapshot")),
-    "snapshot should not render as a console row",
-  );
-  assert(
-    projection.lines.filter((line) => line.kind === "in_flight").length === 2,
-    "in-flight rows expected",
+  assertEquals(projection.status, "running");
+  assertEquals(
+    projection.lines.map((line) => `${line.kind}:${line.body}:${line.streaming}`),
+    ["in_flight:partial:true"],
   );
 });

web/workspace/src/lib/workspace-console/model.ts

@@ -3,7 +3,6 @@ import type {
   InFlightBlock,
   Segment,
 } from "$lib/generated/protocol";
-import type { WorkerTranscriptItem } from "$lib/workspace-sidebar/types";
 import { workspaceRoute } from "$lib/workspace-api/http";
 
 export type ConsoleLineKind =
@@ -24,7 +23,7 @@ export type ConsoleLine = {
   body: string;
   detail?: string;
   cursor?: string | null;
-  source: "initial" | "live";
+  source: "event";
   streaming?: boolean;
   error?: boolean;
 };
@@ -60,103 +59,17 @@ export function workerConsolePath(
   return workerConsoleHref({ runtime_id: runtimeId, worker_id: workerId }, workspaceId);
 }
 
-export function initialConsoleLines(items: WorkerTranscriptItem[]): ConsoleLine[] {
-  return items.map((item) => ({
-    id: `initial-${item.event_id}-${item.sequence}`,
-    kind: initialRoleKind(item.role),
-    title: item.role,
-    body: item.content,
-    source: "initial",
-  }));
-}
+export type ConsoleEventInput = { cursor: string; event: ProtocolEvent };
 
-export function projectConsole(
-  initialItems: WorkerTranscriptItem[],
-  events: Array<{ cursor: string; event: ProtocolEvent }> = [],
-): ConsoleProjection {
-  const visibleEvents = dedupeInitialTranscriptReplay(initialItems, events);
-  return visibleEvents.reduce(applyProtocolEvent, {
-    lines: initialConsoleLines(initialItems),
+export function projectConsole(events: ConsoleEventInput[] = []): ConsoleProjection {
+  return events.reduce(applyProtocolEvent, {
+    lines: [],
     status: null,
     usage: null,
     lastCursor: null,
   });
 }
 
-type EventEnvelope = { cursor: string; event: ProtocolEvent };
-
-function dedupeInitialTranscriptReplay(
-  initialItems: WorkerTranscriptItem[],
-  events: EventEnvelope[],
-): EventEnvelope[] {
-  const remainingInitial = new Map<string, number>();
-  for (const item of initialItems) {
-    if (item.role !== "user" && item.role !== "assistant") continue;
-    const key = transcriptKey(item.role, item.content);
-    remainingInitial.set(key, (remainingInitial.get(key) ?? 0) + 1);
-  }
-
-  const output: EventEnvelope[] = [];
-  let pendingAssistant: EventEnvelope[] = [];
-  let pendingAssistantText = "";
-
-  const flushPendingAssistant = () => {
-    if (pendingAssistant.length === 0) return;
-    output.push(...pendingAssistant);
-    pendingAssistant = [];
-    pendingAssistantText = "";
-  };
-
-  for (const envelope of events) {
-    const event = envelope.event;
-    if (event.event === "user_message") {
-      flushPendingAssistant();
-      const body = segmentsToText(event.data.segments);
-      if (consumeTranscriptKey(remainingInitial, "user", body)) continue;
-      output.push(envelope);
-      continue;
-    }
-    if (event.event === "text_delta") {
-      pendingAssistant.push(envelope);
-      pendingAssistantText += event.data.text;
-      continue;
-    }
-    if (event.event === "text_done") {
-      const body = event.data.text || pendingAssistantText;
-      if (!consumeTranscriptKey(remainingInitial, "assistant", body)) {
-        output.push(...pendingAssistant, envelope);
-      }
-      pendingAssistant = [];
-      pendingAssistantText = "";
-      continue;
-    }
-    flushPendingAssistant();
-    output.push(envelope);
-  }
-  flushPendingAssistant();
-  return output;
-}
-
-function consumeTranscriptKey(
-  remainingInitial: Map<string, number>,
-  role: "user" | "assistant",
-  body: string,
-): boolean {
-  const key = transcriptKey(role, body);
-  const remaining = remainingInitial.get(key) ?? 0;
-  if (remaining <= 0) return false;
-  if (remaining === 1) {
-    remainingInitial.delete(key);
-  } else {
-    remainingInitial.set(key, remaining - 1);
-  }
-  return true;
-}
-
-function transcriptKey(role: "user" | "assistant", body: string): string {
-  return `${role}\0${body}`;
-}
-
 export function applyProtocolEvent(
   projection: ConsoleProjection,
   envelope: { cursor: string; event: ProtocolEvent },
@@ -353,13 +266,6 @@ export function segmentsToText(segments: Segment[]): string {
     .join("\n");
 }
 
-function initialRoleKind(role: string): ConsoleLineKind {
-  if (role === "user" || role === "assistant" || role === "system") {
-    return role;
-  }
-  return "system";
-}
-
 function line(
   cursor: string,
   kind: ConsoleLineKind,
@@ -376,7 +282,7 @@ function line(
     body,
     detail,
     cursor,
-    source: "live",
+    source: "event",
     streaming,
     error,
   };

web/workspace/src/lib/workspace-console/worker-console.ui.test.ts

@@ -52,6 +52,35 @@ Deno.test("workspace Worker list lives on the dedicated Workers page", async ()
   );
 });
 
+Deno.test("Worker Console uses protocol observation events without transcript fetch", async () => {
+  const consolePage = await Deno.readTextFile(
+    new URL("./../../routes/w/[workspaceId]/runtimes/[runtimeId]/workers/[workerId]/console/+page.svelte", import.meta.url),
+  );
+
+  assert(
+    consolePage.includes("seenObservationEventIds") &&
+      consolePage.includes("rememberObservationEvent(frame.envelope.event_id)") &&
+      consolePage.includes("projectConsole(observedEvents.map") &&
+      !consolePage.includes("/transcript") &&
+      !consolePage.includes("WorkerTranscriptProjection"),
+    "Console should render protocol observation replay/live events directly and dedupe repeated frames by event id",
+  );
+});
+
+Deno.test("Decodal source editor keeps imperative EditorView out of reactive state", async () => {
+  const editor = await Deno.readTextFile(
+    new URL("../workspace-settings/DecodalSourceEditor.svelte", import.meta.url),
+  );
+
+  assert(
+    editor.includes("let view: EditorView | null = null") &&
+      !editor.includes("$state<EditorView") &&
+      editor.includes("untrack(() => value)") &&
+      editor.includes("untrack(() => onChange)"),
+    "CodeMirror EditorView must not be reactive state; otherwise mount cleanup can loop forever",
+  );
+});
+
 Deno.test("workspace Runtime management pages expose Runtimes and Runtime-owned workdirs", async () => {
   const sidebar = await Deno.readTextFile(
     new URL("../workspace-sidebar/WorkspaceSidebar.svelte", import.meta.url),
@@ -138,9 +167,9 @@ Deno.test("Worker Console page is routed by runtime_id and worker_id through bac
     "Worker detail should use the scoped backend Worker detail API",
   );
   assert(
-    consolePage.includes("/transcript?limit=200") &&
+    !consolePage.includes("/transcript") &&
       consolePage.includes("/events/ws") && consolePage.includes("/input"),
-    "Console should use bounded transcript, observation WS, and input APIs",
+    "Console should use protocol observation WS and input APIs without a transcript API",
   );
   assert(
     !consolePage.includes("/api/companion"),

web/workspace/src/lib/workspace-settings/DecodalSourceEditor.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+  import { untrack } from 'svelte';
   import { EditorState } from '@codemirror/state';
   import { EditorView, keymap, lineNumbers, highlightActiveLine, drawSelection } from '@codemirror/view';
   import { decodal } from 'decodal-codemirror';
@@ -16,7 +17,7 @@
   } = $props();
 
   let host = $state<HTMLDivElement | null>(null);
-  let view = $state<EditorView | null>(null);
+  let view: EditorView | null = null;
 
   const theme = EditorView.theme({
     '&': {
@@ -35,20 +36,23 @@
 
   $effect(() => {
     if (!host || view) return;
+    const initialValue = untrack(() => value);
+    const initialReadonly = untrack(() => readonly);
+    const handleChange = untrack(() => onChange);
     const editor = new EditorView({
       parent: host,
       state: EditorState.create({
-        doc: value,
+        doc: initialValue,
         extensions: [
           lineNumbers(),
           drawSelection(),
           highlightActiveLine(),
           decodal(),
           keymap.of([]),
-          EditorState.readOnly.of(readonly),
-          EditorView.editable.of(!readonly),
+          EditorState.readOnly.of(initialReadonly),
+          EditorView.editable.of(!initialReadonly),
           EditorView.updateListener.of((update) => {
-            if (update.docChanged) onChange(update.state.doc.toString());
+            if (update.docChanged) handleChange(update.state.doc.toString());
           }),
           theme,
         ],

web/workspace/src/lib/workspace-sidebar/types.ts

@@ -181,30 +181,10 @@ export type WorkerInputResult = {
   state: WorkerOperationState;
   runtime_id: string;
   worker_id: string;
-  transcript_sequence?: number | null;
   event_id?: number | null;
   diagnostics: Diagnostic[];
 };
 
-export type WorkerTranscriptItem = {
-  sequence: number;
-  role: "user" | "assistant" | "system" | string;
-  content: string;
-  event_id: number;
-};
-
-export type WorkerTranscriptProjection = {
-  state: WorkerOperationState;
-  runtime_id: string;
-  worker_id: string;
-  start: number;
-  limit: number;
-  total_items: number;
-  next_start?: number | null;
-  items: WorkerTranscriptItem[];
-  diagnostics: Diagnostic[];
-};
-
 export type ClientWorkerEventWsEnvelope = {
   cursor: string;
   event_id: string;

web/workspace/src/routes/w/[workspaceId]/runtimes/[runtimeId]/workers/[workerId]/console/+page.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+  import { tick } from 'svelte';
   import {
     projectConsole,
     type ConsoleLine
@@ -8,8 +9,7 @@
     ClientWorkerEventWsFrame,
     Diagnostic,
     Worker,
-    WorkerInputResult,
-    WorkerTranscriptProjection
+    WorkerInputResult
   } from '$lib/workspace-sidebar/types';
 
   type Props = {
@@ -32,15 +32,17 @@
 
   let worker = $state<Worker | null>(null);
   let workerError = $state<string | null>(null);
-  let transcript = $state<WorkerTranscriptProjection | null>(null);
-  let transcriptError = $state<string | null>(null);
   let draft = $state('');
   let sending = $state(false);
   let sendError = $state<string | null>(null);
   let streamState = $state<'connecting' | 'open' | 'closed' | 'error'>('connecting');
   let streamDiagnostics = $state<Diagnostic[]>([]);
   let workerDetailsOpen = $state(false);
+  let consoleBodyElement: HTMLElement | null = null;
+  let autoFollowConsole = $state(true);
+  const CONSOLE_BOTTOM_THRESHOLD_PX = 48;
   let observedEvents = $state<Array<{ cursor: string; event: ClientWorkerEventWsFrame & { kind: 'event' } }>>([]);
+  let seenObservationEventIds = new Set<string>();
   let nextReloadToken = 0;
   let reloadToken = $state(0);
 
@@ -52,15 +54,10 @@
   const consoleTarget = $derived({ runtimeId, workerId });
 
   const projection = $derived(
-    projectConsole(
-      transcript?.items ?? [],
-      observedEvents.map((item) => ({ cursor: item.cursor, event: item.event.envelope.payload }))
-    )
+    projectConsole(observedEvents.map((item) => ({ cursor: item.cursor, event: item.event.envelope.payload })))
   );
   const lines = $derived(projection.lines);
-  const diagnostics = $derived(
-    mergeDiagnostics(worker?.diagnostics ?? [], transcript?.diagnostics ?? [], streamDiagnostics)
-  );
+  const diagnostics = $derived(mergeDiagnostics(worker?.diagnostics ?? [], streamDiagnostics));
   const canSend = $derived(Boolean(worker?.capabilities.can_accept_input) && draft.trim().length > 0 && !sending);
 
   async function getJson<T>(path: string): Promise<T> {
@@ -108,20 +105,8 @@
     }
   }
 
-  async function loadTranscript(target: ConsoleTarget) {
-    transcriptError = null;
-    try {
-      transcript = await getJson<WorkerTranscriptProjection>(
-        workerApiPath(`/runtimes/${encodeURIComponent(target.runtimeId)}/workers/${encodeURIComponent(target.workerId)}/transcript?limit=200`)
-      );
-    } catch (error) {
-      transcriptError = error instanceof Error ? error.message : String(error);
-      transcript = null;
-    }
-  }
-
   async function loadConsoleData(target: ConsoleTarget) {
-    await Promise.all([loadWorker(target), loadTranscript(target)]);
+    await loadWorker(target);
   }
 
   function advanceReloadToken(): number {
@@ -130,6 +115,19 @@
     return nextReloadToken;
   }
 
+  function resetObservedEvents() {
+    observedEvents = [];
+    seenObservationEventIds = new Set();
+  }
+
+  function rememberObservationEvent(eventId: string): boolean {
+    if (seenObservationEventIds.has(eventId)) {
+      return false;
+    }
+    seenObservationEventIds.add(eventId);
+    return true;
+  }
+
   async function sendMessage(event: SubmitEvent) {
     event.preventDefault();
     const content = draft.trim();
@@ -149,7 +147,6 @@
       } else {
         sendError = diagnosticsToText(result.diagnostics) || `Input was ${result.state}.`;
       }
-      await loadTranscript(consoleTarget);
     } catch (error) {
       sendError = error instanceof Error ? error.message : String(error);
     } finally {
@@ -181,6 +178,9 @@
       try {
         const frame = JSON.parse(String(message.data)) as ClientWorkerEventWsFrame;
         if (frame.kind === 'event') {
+          if (!rememberObservationEvent(frame.envelope.event_id)) {
+            return;
+          }
           observedEvents = [
             ...observedEvents,
             {
@@ -243,9 +243,42 @@
     return line.error ? 'error' : line.kind;
   }
 
+  function isNearConsoleBottom(element: HTMLElement): boolean {
+    return element.scrollHeight - element.scrollTop - element.clientHeight <= CONSOLE_BOTTOM_THRESHOLD_PX;
+  }
+
+  function handleConsoleScroll() {
+    if (!consoleBodyElement) {
+      return;
+    }
+    autoFollowConsole = isNearConsoleBottom(consoleBodyElement);
+  }
+
+  async function scrollConsoleToBottom() {
+    await tick();
+    if (!consoleBodyElement) {
+      return;
+    }
+    consoleBodyElement.scrollTop = consoleBodyElement.scrollHeight;
+    autoFollowConsole = true;
+  }
+
+  const scrollFollowKey = $derived(
+    lines
+      .map((line) => `${line.source}:${line.kind}:${line.body.length}:${line.streaming ? 'streaming' : 'done'}`)
+      .join('|')
+  );
+
+  $effect(() => {
+    scrollFollowKey;
+    if (autoFollowConsole) {
+      void scrollConsoleToBottom();
+    }
+  });
+
   $effect(() => {
     const target = consoleTarget;
-    observedEvents = [];
+    resetObservedEvents();
     streamDiagnostics = [];
     advanceReloadToken();
     void loadConsoleData(target);
@@ -274,7 +307,7 @@
       </div>
     </section>
 
-    <section class="console-body">
+    <section class="console-body" bind:this={consoleBodyElement} onscroll={handleConsoleScroll}>
       <article class="card console-card worker-console-card">
         {#if projection.status || projection.usage}
           <p class="section-note">
@@ -287,9 +320,6 @@
         {#if workerError}
           <p class="error">{workerError}</p>
         {/if}
-        {#if transcriptError}
-          <p class="error">{transcriptError}</p>
-        {/if}
 
         {#if lines.length === 0}
           <p>No console output is available for this Worker yet.</p>