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.github/scripts/claude-task/resume-callback.mjs

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+#!/usr/bin/env node
+/**
+ * Sends a callback to the resume URL with the Claude task result.
+ * Uses fetch() directly to avoid E2BIG errors from shell argument limits.
+ *
+ * Usage: node resume-callback.mjs
+ *
+ * Environment variables:
+ *   RESUME_URL      - Callback URL to POST to (required)
+ *   EXECUTION_FILE  - Path to Claude's execution output JSON (optional)
+ *   CLAUDE_OUTCOME  - "success" or "failure" (required)
+ *   CLAUDE_SESSION_ID - Session ID for resuming conversations (optional)
+ *   BRANCH_NAME     - Git branch name (optional)
+ */
+
+import { existsSync, readFileSync } from 'node:fs';
+
+const resumeUrl = process.env.RESUME_URL;
+const executionFile = process.env.EXECUTION_FILE;
+const claudeOutcome = process.env.CLAUDE_OUTCOME;
+const sessionId = process.env.CLAUDE_SESSION_ID ?? '';
+const branchName = process.env.BRANCH_NAME ?? '';
+
+if (!resumeUrl) {
+	console.error('RESUME_URL environment variable is required');
+	process.exit(1);
+}
+
+const success = claudeOutcome === 'success';
+let result = null;
+
+if (executionFile && existsSync(executionFile)) {
+	try {
+		const execution = JSON.parse(readFileSync(executionFile, 'utf-8'));
+		// Extract the last element (Claude's final result message)
+		result = Array.isArray(execution) ? execution.at(-1) : execution;
+	} catch (err) {
+		console.warn(`Failed to parse execution file: ${err.message}`);
+	}
+}
+
+const payload = JSON.stringify({ success, branch: branchName, sessionId, result });
+
+try {
+	const response = await fetch(resumeUrl, {
+		method: 'POST',
+		headers: { 'Content-Type': 'application/json' },
+		body: payload,
+	});
+
+	if (!response.ok) {
+		const body = await response.text();
+		console.error(`Callback failed: ${body}`);
+		process.exit(1);
+	}
+} catch (err) {
+	console.error(`Callback error: ${err.message}`);
+	process.exit(1);
+}