Fix MCP server test timeouts in safe_outputs_mcp_server_defaults

[Copilot]

Three tests in safe_outputs_mcp_server_defaults.test.cjs were timing out at 10 seconds because the MCP server process needed more time to initialize and respond before assertions ran.

Changes

• Increased initialization delay: 100ms → 300ms
• Increased request send delay: 200ms → 600ms
• Increased assertion delay: 500ms → 1500ms

Applied to:

• should have optional branch parameter for create_pull_request
• should have optional branch parameter for push_to_pull_request_branch
• should return stringified JSON in text content

The tests spawn a Node.js child process running the MCP server and communicate via stdin/stdout. The original delays were insufficient for the server to process tools/list and tools/call requests before the test checked for responses, resulting in undefined values and timeout failures.

Original prompt

Reference: https://github.com/githubnext/gh-aw/actions/runs/21259049853/job/61181633543

Debug why the JS tests are failing.

Custom agent used: agentic-workflows
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