Concede two errors in the original review: it cited 01-vision.md for a
'perpetual offline use' promise the vision never makes (only 'offline
verifiable'), and it described the clock-rollback check too broadly -
that check only covers same-list rollback, not an older list paired
with a correspondingly rolled-back clock.
Accept Codex's O5 (verified: StoreRevocations replaces the cache after
signature check with no cross-list monotonicity, so signed revocation
lists can be replayed) and O6, plus four precision refinements. Add the
threat-boundary rationale for O5: monotonicity does not stop a local
attacker but does stop distribution-channel replay, a ~38-day revocation
rollback window is exploitable without any clock control, and benign CDN
staleness alone silently rolls back revocation state - making the
'reject older list' check a correctness requirement, not just hardening.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Code-level audit of the authorization chain: domain-separated machine
hash with no raw identifiers in errors or storage, strict License v1
verification (base64 re-encode round-trip, exact 9-field shape,
timestamp round-trip, machine-hash binding), and revocation state with
clock-rollback defense and revoked-before-expiry ordering. Snapshots to
the UI carry no license ID, signature, path or raw Windows identifiers;
defaults fail closed. Catalog/License/Revocation share one canonical
JSON implementation.
No security defect found. Records two product decisions needed: the
revocation list is a hard dependency for any authorization (missing or
>38-day-old list blocks all launches, in tension with the offline
licensing vision and lacking a distribution plan), and trial is a P0
requirement plus MVP acceptance criterion that is deliberately not
implemented, leaving 02-requirements in conflict with the architecture
and task docs.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
ilaandClaude Fable 5