feat: add memory worker runtime crate

crates/worker-runtime/src/interaction.rs

@@ -0,0 +1,44 @@
+use crate::catalog::WorkerStatus;
+use crate::identity::WorkerRef;
+use serde::{Deserialize, Serialize};
+
+/// Input kind accepted by the embedded interaction API.
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum WorkerInputKind {
+    User,
+    System,
+}
+
+/// Worker input request.  v0 stores the input in an in-memory transcript and
+/// does not execute providers/tools.
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
+pub struct WorkerInput {
+    pub kind: WorkerInputKind,
+    pub content: String,
+}
+
+impl WorkerInput {
+    pub fn user(content: impl Into<String>) -> Self {
+        Self {
+            kind: WorkerInputKind::User,
+            content: content.into(),
+        }
+    }
+
+    pub fn system(content: impl Into<String>) -> Self {
+        Self {
+            kind: WorkerInputKind::System,
+            content: content.into(),
+        }
+    }
+}
+
+/// Acknowledgement returned after input is accepted into the in-memory 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,
+}