# Toolchain and Verification

Choose actual commands from `.harness/config.json`, then project presets/build metadata and repository instructions. `python scripts/execute.py` runs the configured complete build/test; use actual configured commands directly for focused checks. Missing metadata is not a passing solver validation.

For behavior changes, observe the relevant failing test before a fix when practical, make the minimal change, and rerun affected checks. Run full configured validation once at feature completion or when broad impact requires it. Preserve warning requirements.

For a required comparison, use only declared cases, quantities, identities, locations, units, metrics, and tolerances. Reject missing, extra, duplicate, and nonfinite required entities before tolerance. Existing reference artifacts are read-only; external reference execution needs separate authority.