Files
multica/server/pkg
J a7c6cbdf16 MUL-2744: fix(auth): renew PAT before first sync; CAS against renewal threshold
Addresses the two issues Elon raised on #3360.

Must-fix: if the PAT is already revoked/expired when the daemon starts,
syncWorkspacesFromAPI 401s and Run returns before the background
tokenRenewalLoop ever fires its initial renewal. The operator only sees
a generic auth failure in the workspace-sync log with no hint that
'multica login' is the fix. Now the startup path runs an inline
tryRenewToken first, surfacing the existing 401 WARN before anything
else gets a chance to fail. Pulled the renew + first-sync pair into
preflightAuth so the ordering invariant is enforced at one site and
tests can exercise the failure modes without spinning up the full Run
setup. Removed the redundant initial tryRenewToken from
tokenRenewalLoop — startup now owns the first call.

Nit: the previous WHERE clause on ExtendPersonalAccessTokenExpiry
(expires_at < $2) did not actually make concurrent renews idempotent
the way the comment claimed. Two callers race-computing
$2 = now + 90d produce strictly-different values, and the second
writer's $2 always exceeds the row the first writer just wrote, so the
UPDATE re-matches and bumps again. Switched to a CAS against the
renewal threshold (expires_at <= $renew_threshold_at, i.e. now + 7d):
once writer A pushes expires_at past the threshold, writer B's UPDATE
matches zero rows and the loser falls back to reporting the
already-extended value as a no-op.

Tests:
- TestPreflightAuth_RenewsBeforeWorkspaceSyncOnExpiredToken locks in
  the call ordering — renew endpoint is hit before workspaces, and the
  re-login WARN appears even though both endpoints 401.
- TestPreflightAuth_SyncProceedsWhenRenewIsNoOp covers steady-state
  startup: a renew=false no-op must still progress to workspace sync.
- TestPreflightAuth_TransientRenewFailureDoesNotBlockStartup covers a
  500 from the renew endpoint — startup must continue, no WARN.
- TestRenewPAT_ParallelRenewExtendsExactlyOnce fires N=8 concurrent
  renews at one row and asserts exactly one returns renewed=true with
  the others reporting the same already-extended expires_at, plus the
  DB carries only that single bumped value.

Co-authored-by: multica-agent <github@multica.ai>
2026-05-27 16:30:54 +08:00
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