refactor(agent): expose resolved input acceptance

packages/goal/command-goal/tests/command-goal.spec.ts

@@ -52,6 +52,7 @@ function stubAgent(id: string): { agent: Agent; session: Session } {
     queue: () => AgentMessageId('stub'),
     steer: () => AgentMessageId('stub'),
     inject(content, options) { appendInjection(session, content, options); return AgentMessageId('stub') },
+    acceptInput: () => AgentMessageId('stub'),
     cancel() { status = 'idle' },
     whenIdle() { return Promise.resolve() },
   }

packages/goal/goal/tests/goal.spec.ts

@@ -72,6 +72,7 @@ function stubAgentForSession(session: Session): StubAgent {
       else appendInjection(session, content, options)
       return AgentMessageId('stub')
     },
+    acceptInput: () => AgentMessageId('stub'),
     cancel() {},
     whenIdle() { return Promise.resolve() },
   }

packages/goal/tool-goal/tests/tool-goal.spec.ts

@@ -43,6 +43,7 @@ function stubAgent(rawId: string, supplied?: Session): StubAgent {
       }, { surfaceOp: 'append' })
       return AgentMessageId('stub')
     },
+    acceptInput: () => AgentMessageId('stub'),
     cancel() {},
     whenIdle() { return Promise.resolve() },
   }