feat: add script execution phase to agent-runner

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

container/agent-runner/src/index.ts

@@ -16,6 +16,7 @@
 
 import fs from 'fs';
 import path from 'path';
+import { execFile } from 'child_process';
 import { query, HookCallback, PreCompactHookInput } from '@anthropic-ai/claude-agent-sdk';
 import { fileURLToPath } from 'url';
 
@@ -465,6 +466,55 @@ async function runQuery(
   return { newSessionId, lastAssistantUuid, closedDuringQuery };
 }
 
+interface ScriptResult {
+  wakeAgent: boolean;
+  data?: unknown;
+}
+
+const SCRIPT_TIMEOUT_MS = 30_000;
+
+async function runScript(script: string): Promise<ScriptResult | null> {
+  const scriptPath = '/tmp/task-script.sh';
+  fs.writeFileSync(scriptPath, script, { mode: 0o755 });
+
+  return new Promise((resolve) => {
+    execFile('bash', [scriptPath], {
+      timeout: SCRIPT_TIMEOUT_MS,
+      maxBuffer: 1024 * 1024,
+      env: process.env,
+    }, (error, stdout, stderr) => {
+      if (stderr) {
+        log(`Script stderr: ${stderr.slice(0, 500)}`);
+      }
+
+      if (error) {
+        log(`Script error: ${error.message}`);
+        return resolve(null);
+      }
+
+      // Parse last non-empty line of stdout as JSON
+      const lines = stdout.trim().split('\n');
+      const lastLine = lines[lines.length - 1];
+      if (!lastLine) {
+        log('Script produced no output');
+        return resolve(null);
+      }
+
+      try {
+        const result = JSON.parse(lastLine);
+        if (typeof result.wakeAgent !== 'boolean') {
+          log(`Script output missing wakeAgent boolean: ${lastLine.slice(0, 200)}`);
+          return resolve(null);
+        }
+        resolve(result as ScriptResult);
+      } catch {
+        log(`Script output is not valid JSON: ${lastLine.slice(0, 200)}`);
+        resolve(null);
+      }
+    });
+  });
+}
+
 async function main(): Promise<void> {
   let containerInput: ContainerInput;
 
@@ -506,6 +556,26 @@ async function main(): Promise<void> {
     prompt += '\n' + pending.join('\n');
   }
 
+  // Script phase: run script before waking agent
+  if (containerInput.script && containerInput.isScheduledTask) {
+    log('Running task script...');
+    const scriptResult = await runScript(containerInput.script);
+
+    if (!scriptResult || !scriptResult.wakeAgent) {
+      const reason = scriptResult ? 'wakeAgent=false' : 'script error/no output';
+      log(`Script decided not to wake agent: ${reason}`);
+      writeOutput({
+        status: 'success',
+        result: `Script: ${reason}`,
+      });
+      return;
+    }
+
+    // Script says wake agent — enrich prompt with script data
+    log(`Script wakeAgent=true, enriching prompt with data`);
+    prompt = `[SCHEDULED TASK]\n\nScript output:\n${JSON.stringify(scriptResult.data, null, 2)}\n\nInstructions:\n${containerInput.prompt}`;
+  }
+
   // Query loop: run query → wait for IPC message → run new query → repeat
   let resumeAt: string | undefined;
   try {