feat(19-01): add getAgentQuestions and listWaitingAgents tRPC procedures

- getAgentQuestions returns structured PendingQuestions from AgentManager
- listWaitingAgents filters agents to waiting_for_input status
- Updated JSDoc procedure list with both new procedures

src/trpc/router.ts

@@ -8,7 +8,7 @@
 import { initTRPC, TRPCError } from '@trpc/server';
 import { z } from 'zod';
 import type { TRPCContext } from './context.js';
-import type { AgentInfo, AgentResult } from '../agent/types.js';
+import type { AgentInfo, AgentResult, PendingQuestions } from '../agent/types.js';
 import type { TaskRepository } from '../db/repositories/task-repository.js';
 import type { MessageRepository } from '../db/repositories/message-repository.js';
 import type { InitiativeRepository } from '../db/repositories/initiative-repository.js';
@@ -308,6 +308,8 @@ function requirePhaseDispatchManager(ctx: TRPCContext): PhaseDispatchManager {
  * - getAgentByName: Get agent by name
  * - resumeAgent: Resume an agent waiting for input
  * - getAgentResult: Get result of agent's work
+ * - getAgentQuestions: Get pending questions for an agent waiting for input
+ * - listWaitingAgents: List agents currently waiting for user input
  * - listTasks: List tasks for a plan
  * - getTask: Get task by ID
  * - updateTaskStatus: Update task status
@@ -454,6 +456,29 @@ export const appRouter = router({
       return agentManager.getResult(agent.id);
     }),
 
+  /**
+   * Get pending questions for an agent waiting for input.
+   * Returns structured question data (options, multiSelect) from AgentManager.
+   */
+  getAgentQuestions: publicProcedure
+    .input(agentIdentifierSchema)
+    .query(async ({ ctx, input }): Promise<PendingQuestions | null> => {
+      const agentManager = requireAgentManager(ctx);
+      const agent = await resolveAgent(ctx, input);
+      return agentManager.getPendingQuestions(agent.id);
+    }),
+
+  /**
+   * List agents currently waiting for user input.
+   * Filters to only agents with status 'waiting_for_input'.
+   */
+  listWaitingAgents: publicProcedure
+    .query(async ({ ctx }) => {
+      const agentManager = requireAgentManager(ctx);
+      const allAgents = await agentManager.list();
+      return allAgents.filter(agent => agent.status === 'waiting_for_input');
+    }),
+
   // ===========================================================================
   // Task Procedures
   // ===========================================================================