Epic 003 implementation tasks

These are small, ordered implementation prompts. A story is not an implementation task. Prefer one independently understandable behavior and its evidence, delivered as a thin vertical slice where needed. Update task status here and in its file together.

Every task inherits this execution contract:

  1. Read the parent story/scenarios, scope/invariants, relevant canonical guides, current state, and handover; inspect actual code.
  2. Preserve architecture: frontend API boundary, HTTP/application/domain separation, repositories, and provider adapters. Update OpenAPI/TSDoc/project docs when affected.
  3. Put every applicable scenario ID literally in test titles or native metadata and update traceability.
  4. Add the lowest useful tests and higher-level evidence specified by the scenario. Do not use browser E2E to prove persistence/history unnaturally.
  5. Apply the repository Definition of Done, run pnpm quality, perform proportional validation, and update current state/handover with real results.

Phase 1 — Product administration

Task Behavior Depends on Status
MVP-TASK-001 Protected product list and empty state Application Zero auth Done
MVP-TASK-002 Create valid product 001 Done
MVP-TASK-003 Reject invalid product 002 Done
MVP-TASK-004 Edit product for future use 002 Done
MVP-TASK-005 Delete product from new ordering 002 Done

Phase 2 — Current order

Task Behavior Depends on Status
MVP-TASK-006 Render empty always-active cart and product cards 001 Done
MVP-TASK-007 Add products through direct/repeated taps 006 Done
MVP-TASK-008 Show item count and gross total 007 Done
MVP-TASK-009 Review, correct, and abandon cart 008 Done
MVP-TASK-010 Capture operational metadata 009 Done

Phase 3 — Checkout boundary and finalization

Task Behavior Depends on Status
MVP-TASK-011 Neutral checkout facade and deterministic fake Foundation Done
MVP-TASK-012 Finalize non-commercial order 009–010 Done
MVP-TASK-013 Successful fake checkout finalizes commercial order 011–012 Done

Phase 4 — Active kitchen queue

Task Behavior Depends on Status
MVP-TASK-014 Render one chronological detailed order 012 Done
MVP-TASK-015 Render next detailed slips and kitchen labels 014 Done
MVP-TASK-016 Render compact numbered/unnumbered overflow 015 Done
MVP-TASK-017 Active count and approximately-15-order queue 016 Done

Phase 5 — Fulfillment and history

Task Behavior Depends on Status
MVP-TASK-018 Queued → Preparing 014 Done
MVP-TASK-019 Preparing → Ready 018 Done
MVP-TASK-020 Ready → Delivered and active removal 019 Done
MVP-TASK-021 Backward active-state corrections 019 In progress
MVP-TASK-022 Explicit detailed state selector 021 In progress
MVP-TASK-023 Durable snapshots and append-only significant history 012–021 In progress
MVP-TASK-024 Edit note/queue number with history 023 In progress

Phase 6 — Live sales

Task Behavior Depends on Status
MVP-TASK-025 Current-day commercial gross total 013, 023 In progress
MVP-TASK-026 Per-product counts and stable identity 025 In progress
MVP-TASK-027 Sales exclusions, fulfillment neutrality, restart 026 In progress

Phase 7 — Checkout safety and reliability

Task Behavior Depends on Status
MVP-TASK-028 Definitive checkout failure/cancellation 013 In progress
MVP-TASK-029 Unknown checkout outcome and no blind retry 028 In progress
MVP-TASK-030 Duplicate checkout initiation protection 029 In progress
MVP-TASK-031 Visible backend/provider failure isolation 028–030 Implemented
MVP-TASK-032 Process-restart durability proof 023, 027 Implemented

Phase 8 — Provider discovery and conditional adapter

Task Behavior Depends on Status
MVP-TASK-033 Design Surfboard Demo payment/ECR integration None; parallel-safe Implemented
MVP-TASK-034 Implement Surfboard Demo payment/ECR adapters 033, safety tasks Blocked

Phase 9 — Headline and traceability completion

Task Behavior Depends on Status
MVP-TASK-035 Journey 001 executable demonstration 001–016 Implemented
MVP-TASK-036 Journey 002 commercial loop 013–027 Implemented
MVP-TASK-037 Journey 003 non-commercial loop 012, 014–027 Implemented
MVP-TASK-038 Journey 004 checkout failure safety 028–031 Implemented
MVP-TASK-039 Automate scenario/test ID validation Stable corpus of tests Implemented

Tasks 033 and the fake-backed application path may proceed independently. Task 034 is conditional: if discovery finds no safe supported checkout API, record that outcome and do not invent an adapter. Journey tasks consolidate demonstrations only after smaller scenario evidence exists; they do not replace it.