Add PUT /sessions/{id} for legacy conversation updates in tkmind compat.

Portal direct-chat mirror and tool-history repair expect this route.

Co-authored-by: Cursor <cursoragent@cursor.com>

crates/goose/src/acp/tkmind/compat.rs

@@ -3,12 +3,14 @@ use std::sync::Arc;
 use axum::{
     extract::{Path, State},
     http::StatusCode,
-    routing::{delete, get},
+    routing::{delete, get, put},
     Json, Router,
 };
 
 use crate::agents::ExtensionConfig;
 use crate::config::Config;
+use crate::conversation::message::Message;
+use crate::conversation::Conversation;
 use crate::session::{EnabledExtensionsState, Session};
 
 use super::state::AppState;
@@ -92,11 +94,42 @@ async fn get_session(
         .map_err(|_| StatusCode::NOT_FOUND)
 }
 
+#[derive(serde::Deserialize)]
+struct UpdateLegacySessionRequest {
+    conversation: Option<Vec<Message>>,
+}
+
+async fn update_session(
+    State(state): State<Arc<AppState>>,
+    Path(session_id): Path<String>,
+    Json(payload): Json<UpdateLegacySessionRequest>,
+) -> Result<StatusCode, StatusCode> {
+    state
+        .session_manager()
+        .get_session(&session_id, false)
+        .await
+        .map_err(|_| StatusCode::NOT_FOUND)?;
+
+    let Some(messages) = payload.conversation else {
+        return Ok(StatusCode::OK);
+    };
+
+    let conversation = Conversation::new_unvalidated(messages);
+    state
+        .session_manager()
+        .replace_conversation(&session_id, &conversation)
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+
+    Ok(StatusCode::OK)
+}
+
 pub fn routes(state: Arc<AppState>) -> Router {
     Router::new()
         .route("/sessions", get(list_sessions))
         .route("/sessions/{session_id}", get(get_session))
         .route("/sessions/{session_id}/extensions", get(get_session_extensions))
+        .route("/sessions/{session_id}", put(update_session))
         .route("/sessions/{session_id}", delete(delete_session))
         .with_state(state)
 }