Epic: POS feature roadmap (financial core → catalog/inventory → pricing/tender → orchestration → customer surfaces → kiosk) #370

Epic: POS feature roadmap — build shared foundations once, then reuse them across POS/kiosk/customer display.

Why this ordering

Features below share foundations (pricing, inventory, payment, catalog). Doing them in the wrong order means rewriting pricing/inventory/payment/POS repeatedly. The domain primitives come first; kiosk becomes "another frontend over the same battle-tested services."

Phase 1 — Financial correctness

• Feature: Shift lifecycle management, cash drawer reconciliation, & business day close #279 Shift lifecycle / cash drawer reconciliation (existing).
• Financials: Implement idempotent refund system & fix partial refund over-collection #278 Idempotent refund system (existing).
• Architecture: Central pricing/adjustment service & financial ledger boundary #369 Central pricing/adjustment service & financial ledger boundary (new foundation).
• Integration: audit/refund/day-close.

Phase 2 — Quick operational improvements

• Feature: Touchscreen-first POS UX (cross-cutting standard) #368 Touchscreen-first POS UX audit (cross-cutting standard; start now).
• Feature: Floorplan editor for tables (drag & drop visual map) #356 Floorplan editor (nearly a free win — data model already exists).

Phase 3 — Catalog/inventory foundation

• Feature: Real product variants (variant groups/options with SKU, barcode, price delta, optional stock) #357 Product variants (real variant groups/options; SKU/barcode/price/stock).
• Feature: Inventory for add-ons (stock, low-stock, transactional deduct/restore) #358 Add-on stock (transactional deduct/restore).
• Feature: Weighted products & scale-generated barcodes (electronic scale, stage 1) #365 Weighted products & scale-generated barcodes (stage 1).

Phase 4 — Pricing and tender

• Feature: Promotion engine with coupons as one mechanism #359 Promotion engine with coupons as one mechanism.
• Feature: Gift cards as a payment/liability ledger (not a discount) #363 Gift cards as a payment/liability ledger.
• (Ties into Architecture: Central pricing/adjustment service & financial ledger boundary #369 pricing service and Feature: Append-only product inventory movement ledger & history API (shipped) #280 inventory movement ledger.)

Phase 5 — Order orchestration

• Feature: Scheduled orders with release semantics #360 Scheduled orders with release semantics.
• Feature: Multi-counter ordering flow (create here, pay there) #361 Multi-counter ordering flow (checkout_stage separate from kitchen status).

Phase 6 — Customer interaction

• Feature: Customer-facing display on a second monitor #362 Customer-facing display on a second monitor.
• Feature: Tipping (separate tip_amount, customer-facing selection) #364 Tipping (separate tip_amount).

Phase 7 — Advanced menu

• Feature: Combos as real bundles (component slots, not add-ons) #366 Combos as real bundles (after variants/pricing).

Phase 8 — Hardware expansion

• Stage 2 of Feature: Weighted products & scale-generated barcodes (electronic scale, stage 1) #365: direct USB/HID/serial scale support.

Phase 9 — Kiosk

• Feature: Self-service kiosk (separate /kiosk surface, restricted API boundary) #367 Self-service kiosk (separate restricted surface; reuses everything above).

Tracking

Each feature issue carries its own acceptance criteria, codebase grounding, and dependencies. Refunds (#278) and shifts (#279) are already open; this epic links the remaining roadmap.