Bugfix

Autonomous end-to-end bug fix: diagnose from evidence, find root cause, minimal fix, verify, commit.

NEVER

Never ask the user for more information unless the bug description is completely ambiguous — use tools to find it.
Never refactor unrelated code while fixing a bug — scope creep breaks regression isolation.
Never fix other bugs you notice while fixing the target — create a new task instead.
Never git add -A — stage only the files you changed.
Never skip running the full workspace test suite after a fix — targeted test passing doesn't mean no regression.
Never commit until typecheck passes on the affected workspace.