- Think Before — assumptions surfaced; multiple interpretations named where present.
- Simplicity First — minimum diff that solves the asked problem; no speculative abstractions; no error handling for impossible cases.
- Surgical Changes — every changed line traces to the PR's stated scope; no drive-by refactors; matching existing style.
- Goal-Driven — for new behavior: failing test written first (or commit body cites the verify-command + exit code). No "looks good" claims.
$ tests/run.sh all
…