feat(S-102): Test-drive and implement --timeout flag, config layering, and default in

tools/ai-cli-dispatch/src/execute.ts

@@ -28,12 +28,14 @@ export async function executePrompt(
       stdout: "",
       stderr: "",
       exitCode: -1,
+      client,
+      durationMs: 0,
     });
   }
 
   const spawnImpl = options.spawn ?? defaultSpawn;
   const existsSyncImpl = options.existsSync ?? defaultExistsSync;
-  const timeoutMs = options.timeoutMs ?? 300_000;
+  const timeoutMs = options.timeoutMs ?? 600_000;
 
   const command = options.clientPath ?? client;
   if (options.clientPath && !existsSyncImpl(options.clientPath)) {
@@ -46,6 +48,8 @@ export async function executePrompt(
       stdout: "",
       stderr: "",
       exitCode: -1,
+      client,
+      durationMs: 0,
     });
   }
   const args = argBuilder(prompt);
@@ -55,6 +59,7 @@ export async function executePrompt(
     let timedOut = false;
     let stdout = "";
     let stderr = "";
+    const startMs = Date.now();
 
     const child = spawnImpl(command, args, {
       shell: false,
@@ -80,8 +85,16 @@ export async function executePrompt(
       if (settled) return;
       settled = true;
       clearTimeout(timeout);
-      if (err) reject(err);
-      else resolve(result!);
+      const durationMs = Date.now() - startMs;
+      if (err) {
+        if (err instanceof ExecError) {
+          err.result.client = client;
+          err.result.durationMs = durationMs;
+        }
+        reject(err);
+      } else {
+        resolve({ ...result!, client, durationMs });
+      }
     }
 
     child.on("error", (err: NodeJS.ErrnoException) => {
@@ -89,7 +102,7 @@ export async function executePrompt(
         settle(new ClientNotFoundError(client));
       } else {
         settle(
-          new ExecError(err.message, { stdout, stderr, exitCode: -1 })
+          new ExecError(err.message, { stdout, stderr, exitCode: -1, client, durationMs: 0 })
         );
       }
     });
@@ -101,10 +114,12 @@ export async function executePrompt(
             stdout,
             stderr,
             exitCode: -1,
+            client,
+            durationMs: 0,
           })
         );
       } else {
-        settle(undefined, { stdout, stderr, exitCode: code ?? -1 });
+        settle(undefined, { stdout, stderr, exitCode: code ?? -1, client, durationMs: 0 });
       }
     });
   });