Ln 404 Test Executor

The ln-404-test-executor skill enables AI agents to programmatically verify the existence of specific web resources by attempting to access them and interpreting HTTP 404 responses. It automates the detection of missing pages, broken links, or non-existent endpoints within a target application without requiring manual inspection.

When to use it

• Validating that new feature routes are correctly implemented before deployment.
• Auditing legacy applications for dead links or removed documentation pages.
• Testing error handling logic when an AI agent attempts to navigate to invalid URLs.
• Confirming that specific API endpoints return the expected "Not Found" status codes.

Key capabilities

• Initiates HTTP requests to specified URLs to check resource availability.
• Detects and reports 404 (Not Found) status codes returned by servers.
• Provides immediate feedback on whether a target path exists or is missing.

Example prompts

• "Check if the /api/v2/users endpoint returns a 404 error."
• "Verify that the documentation page at https://example.com/guides/deprecated has been removed."
• "Test whether the new dashboard route /app/new-dashboard is accessible or missing."

Tips & gotchas

Ensure the target server allows automated requests, as some sites block non-browser traffic. This skill confirms absence; it does not diagnose why a resource might be inaccessible due to authentication errors or network issues beyond the 404 status.