Investigated the 0.0.25 break: it is ONLY an endpoint rename
(/api/auth/bootstrap -> /api/auth/browser-session). The rest of the pairing
contract (credential payload, t3_session cookie, /api/auth/session) is
byte-identical, verified in isolated 0.0.24-vs-0.0.25 sandbox serves. So a
future pin bump is now safe + reversible (pin STAYS 0.0.24 — this is prep):
- t3-dispatch: autoPair tries /api/auth/browser-session, falls back to
/api/auth/bootstrap on 404 — one binary pairs across both versions and any
rolling-restart skew. TDD via TestAutoPairAcrossVersions (red on 0.0.25
before, green after). Built, deployed, verified live on 0.0.24 (all three
users still 302 + t3_session via the fallback).
- t3-autoupdate.sh: health-check now exercises the REAL mint->credential->cookie
handshake (was GET / -> 200, which passed the pairing-broken nightly). A bad
build now auto-rolls-back. Validated against both versions.
- t3-backup-state.{sh,service,timer}: daily online VACUUM INTO of each ~/.t3
state.sqlite (was the only copy, unbacked) -> the one-way forward schema
migration becomes a restore, not sqlite surgery. timeout-guarded.
- runbooks/t3-version-bump.md: the reversible cutover checklist.
- post-mortem #5 (health-check) DONE + #6 added; service-catalog updated.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
