1## Summary23<!-- What changed and why, in terms a reviewer can verify. Link the issues this closes. -->45## Contract impact67<!-- Contract IDs implemented or changed (e.g. DX-LOCAL-01), with status transitions8 (proposed → validated / revised / rejected). Write "none" for mechanical changes. -->910## Evidence1112<!-- What was run and observed; where retained evidence lives (paths, measurements,13 decision record). "Worked once" is not evidence. -->1415## Checklist1617- [ ] `deno task check` passes locally18- [ ] Contract table and decision records updated if any promise changed19- [ ] No server-only secret value appears in code, examples, logs, or build output20- [ ] Product UI stays inside the author boundary (no raw Jazz / workers / transports / Workbox)