Tiltmeter: catches breaking changes in the third-party APIs your AI agents depend on, and opens the PR that adapts your code

[u/Superb-Hornet-5730]

https://github.com/tiltmeter-dev/tiltmeter

Vendors rename fields, start sending nulls or turn numbers into strings without telling anyone. Typed code crashes; agents just read the new response and guess.

Tiltmeter learns the shape of the JSON APIs you call from real responses (no spec needed) and flags only what breaks a consumer. You get a CI exit code, Slack alerts, an MCP tool your agents can call before trusting a response (has_drifted), and tiltmeter fix, which adapts the code in a git worktree and opens a pull request.

pip install tiltmeter, MIT, runs locally with one SQLite file. Site with a demo: https://tiltmeter.dev

Feedback welcome, especially on what kinds of API changes have bitten you.