Modify Code Safely · maxliuyy bundle Use before any task that may modify source code, tests, executable scripts, runtime configs, dependencies, data processing, training or inference behavior, public APIs, or checkpoint contracts. Run a read-only preflight, obtain user confirmation of preserved, allowed, and unknown behavior plus the planned scope, then enforce one production path and evidence-backed validation. Do not use for read-only explanation, review, diagnosis, planning, or documentation-only edits.