feat: slash system / input service / agent scope

packages/host/apiproxy/src/api/sessions.ts

@@ -39,6 +39,14 @@ export interface SessionSummary {
   updatedAt: number
   /** Status of the attached agent; always false for cold (unattached) sessions. */
   running: boolean
+  /**
+   * Derived emptiness bit: true while the session log holds zero events (no
+   * user message yet). Clients hide blank sessions from lists and reuse them
+   * for New Session on the same workspace. Always false for cold sessions —
+   * lazy persistence keeps a never-appended session out of the store, so a
+   * listed cold session necessarily has events.
+   */
+  blank: boolean
   /** fork/spawn lineage (session.header.parentSession passthrough); absent for root sessions. */
   parentSessionId?: SessionId
   /** Session working directory (header.cwd passthrough); absent when unrecorded. */
@@ -54,9 +62,9 @@ export interface SessionsApi {
    * Creates a real session and its idle agent. At most one of `workspaceId` /
    * `cwd` is accepted; an omitted project uses the Host cwd. A caller may
    * preallocate `sessionId`: retries with the same id and cwd return the same
-   * session, while a different cwd fails with `session-conflict`.
-   * Workspace creation attaches the session after publication; an attach
-   * failure returns `workspace-attach-failed` with the published session id.
+   * session, while a different cwd fails with `session-conflict`. Workspace
+   * creation attaches the session after publication; an attach failure
+   * returns `workspace-attach-failed` with the published session id.
    */
   create(request: RpcRequest<{ workspaceId?: WorkspaceId; cwd?: string; sessionId?: SessionId }>):
   Promise<RpcResponse<{ sessionId: SessionId }>>