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A gate closes against a number, an owner, and a fallback

concept

Symmetry of rigor: every gate closes against a number, an owner, and a fallback. Gate Zero is feasibility BEFORE form — the architecture is not permitted to proceed on enthusiasm, only on a first-order budget that closes. Numbers that are provisional are marked provisional (design targets, not measured performance). WHERE IT ALREADY BEARS WEIGHT — Stronger than what this project's own gate does. `tools/check.py` closes against a number (coverage floors, 0 false positives, a real exit code) but names no OWNER and no FALLBACK for a failing gate. The punch list has completion tests; it does not say who answers for each or what happens if one cannot close. Worth adopting.

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