lint-first

Run deterministic tooling (typecheck, linters, autofixers) FIRST — before any agentic file-by-file inspection — when asked to find or fix syntax errors, type errors, code quality issues, any usage, or to check/clean up/audit the codebase. Two stages: (1) discover and use the repo's existing typecheck/lint/format setup; (2) if none exists, propose adding one before doing any manual inspection. Manual reading is the LAST resort, reserved for what tooling cannot catch or fix.