[diegosouzapw]

Summary

Replace the brittle reserved-prefix total of 414 with an exact membership contract derived from live registry IDs/aliases and the retirement inventories. Check set equality (including absence of extra members), measured count consistency, runtime reservation and write-schema rejection for every expected prefix. Existing case-sensitivity, retired-ID, allowed-prefix and HTTP route tests stay in place.

No production code changes or weakened reservation policy. New providers no longer require editing a memorized total; accidentally omitted or extra reserved prefixes still fail.

Evidence

• Base 373c31f: 20 PASS, one failure (415 versus stale 414).
• Updated suite: 21 PASS, zero failures/skips, including all expected prefix write-path checks.
• Prettier, focused ESLint, diff check and full branch hooks passed.

Draft recovery slice, not full-candidate acceptance. Combined CI and rollout remain pending.

[diegosouzapw]

Fechando como coberta pela #14511, mergeada na release/v3.8.51 (drenou as mesmas base-reds: genérico de stdio do auggie, imports do projectCombo, strip de _native*Passthrough e os guards de catálogo/prefixo/qwen/opencode/quota). O conteúdo que só esta PR tinha já entrou pelas #14501, #14503, #14508 e #14516. (merge-batch 2026-09-24)