Awesome project! I'm interested in potentially using ast-grep as the foundation for Ruff's plugin system (some discussion in astral-sh/ruff#283).

What I'm envisioning: users express custom lint rules via the ast-grep YAML syntax; Ruff picks up those rules, parses + executes them via ast-grep, and includes the surfaced messages + fixes in its own output abstractions.

Before I dig in, I wanted to see if (1) this kind of use-case is within-scope for ast-grep, (2) if it's possible now or depends on future work, and (3) if you had any pointers on how to get started (I know the API docs are a work-in-progress so any tips would be appreciated).