Skip to main content
​
2026-07-19

​
Write-freeze / maintenance mode

Operators can now freeze LIP writes during a cutover window — independent of the BFF. When frozen, every /lip/v1 write returns a stable 503 write_frozen (RFC 9457) with a Retry-After header, while reads and /health stay available.
  • Startup: lip serve --write-freeze or LIP_WRITE_FREEZE=true.
  • Runtime: POST /admin/api/v1/maintenance {"write_frozen": true|false} (admin key + CSRF); GET returns the current state.
  • GET /health reports write_frozen for canary checks.

​
lip cloud-verify

A new CLI command runs doctor, conformance, and optional member-balance expectations against a deployed Cloud/staging host, so a cutover can be gated on a green run.
​
2026-07-18

​
Idempotent replay fix

A retry that reuses the idempotency key with a regenerated request_id / occurred_at now returns the original result — the provider compares the business payload and echoes the retry’s request_id on the replayed response. Reusing a key with a different payload still returns 409 idempotency_conflict. Idempotency entries stored before 0.1.1 keep working under a pinned replay (dual-check).
​
2026-07-18

​
First public release

LIP 0.1.0 is published to npm under the @loyalty-interchange scope with build provenance. Run the sandbox without cloning:
Protocol & program model
  • Initial LIP core and foodservice profile.
  • Program, tier, reward, account-summary, and cursor-based ledger read models.
  • Configurable earning policies for minimum spend, channels, exclusions, and rounding.
  • Annual tier qualification windows, tier multipliers, and original-rate refund attribution.
  • Earned-date point lots with FIFO consumption, reversal restoration, expiring balance buckets, and source-linked expiration ledger entries.
Engine & storage
  • Deterministic reference engine with versioned snapshots and program-fingerprint validation.
  • Pluggable state-store contract and a durable SQLite implementation.
  • Seeded foodservice reference platform with restart-safe local and Docker state.
API, SDK & tooling
  • HTTP reference server and black-box conformance suite.
  • Generated and idiomatic TypeScript clients for the account experience operations.
  • TypeScript schema package with JSON Schema Draft 2020-12 validation.
Admin
  • Authenticated read-only Admin API and a responsive Admin application for program, member, tier, expiration, ledger, and developer inspection.