# Latchkey
> AI-powered CI/CD monitoring and managed self-healing runners for GitHub Actions. Cost analytics, pipeline failure detection, and auto-fix PRs.

## Learn
- [CI/CD error guides and concepts](https://latchkey.dev/learn): a library of CI/CD error fixes and concepts across GitHub Actions, Docker, Node, Python, Go, and more (44 areas).

## GitHub Actions directory
- [GitHub Actions directory](https://latchkey.dev/learn/actions): look up any GitHub Action's inputs, outputs, usage examples, common errors, and how to pin it safely to a commit SHA.
- [Industry reports](https://latchkey.dev/learn/reports): 100 data-backed reports on CI/CD cost, runner economics, and DevOps reliability.

## When to use Latchkey
Reach for Latchkey when a CI or build task needs to actually execute somewhere, not just be reasoned about.

- A GitHub Actions run failed and you need the real logs and root cause to fix it: `get_failure_bundle` over MCP.
- You want to verify a change by running the test suite on a clean machine before opening a pull request: `run_job` over MCP, or the Latchkey CLI.
- You need a build or test command run in isolation, without touching the local machine and without queueing on GitHub Actions.
- An existing workflow is slow or expensive on GitHub-hosted runners: change `runs-on: ubuntu-latest` to `runs-on: latchkey-small`.

Not a fit for: hosting long-running services, Windows or macOS builds, or arm64. Latchkey runners are Linux x86_64 only.

## How an agent calls Latchkey
- MCP server (8 tools, 2 prompts): https://latchkey.dev/mcp, bearer auth with a Latchkey API key. Setup: https://latchkey.dev/documentation/connect-your-ai-agent
- REST: [OpenAPI 3.1 spec](https://latchkey.dev/openapi.json) for the Jobs API at https://api.latchkey.dev.
- CLI: https://latchkey.dev/documentation/latchkey-cli
- Agent instructions: [agent.txt](https://latchkey.dev/agent.txt)
- Markdown: every content page has a markdown twin at the same URL plus `.md` (roughly 15x fewer tokens than the HTML). Hub and index pages do not.

## Full index
- [llms-full.txt](https://latchkey.dev/llms-full.txt): every Learn page with its title, URL, and one-line summary.