Archive plan: gateway freeze banner

DEVELOPMENT MOVED (frozen 2026-07-18). Active development of this product lives in the public open-cowork monorepo: products/gateway · CLI cowork-gateway (compat: opencode-gateway). Docs: Gateway product page · issues via open-cowork / Linear project open-cowork. This private repository is frozen (no new features) and will be archived. Do not open feature PRs here.