fix: commit step context before request dispatch

packages/context/tmux-context/src/index.ts

@@ -233,9 +233,9 @@ export function apply(ctx: Context, config: Config): void {
     if (location === undefined) return
     const state = renderState(location)
     if (previous !== undefined && previous.state === state) return
-    agent.inject(createUserMessage({
+    agent.session.append('user/message', createUserMessage({
       content: [{ type: 'text', text: renderReading(location, turn) }],
       source: { kind: 'plugin', plugin: name },
-    }))
+    }), { surfaceOp: 'append' })
   }, { prepend: true })
 }

packages/context/tmux-context/tests/tmux-context.spec.ts

@@ -101,9 +101,7 @@ function sessionAgent(session: Session, id = 'agent'): Agent {
     ctx: new Context(),
     followup: () => {},
     steer: () => {},
-    inject(input) {
-      session.append('user/message', input, { surfaceOp: 'append' })
-    },
+    inject: () => { throw new Error('tmux-context must append directly to the open step') },
     cancel() {},
     whenIdle: () => Promise.resolve(),
   }