# Backend — PROGRESS (Phase 1: Inventory & Supply Chain)

Legend: `[ ]` not started · `[~]` in progress · `[x]` done
Spec: `docs/10-BACKEND-PHASE1.md` (model + rules) · `docs/11-BACKEND-PHASE1.md` (API)
Convention: `docs/01-DOC-GUIDE.md §6`. Update this file in the **same commit** as the code. When ticking `[x]`, append a short note + any deviation.

## 0. Bootstrap
- [ ] Solution + Web API project (`net10.0`), packages restored (00-CORE §5.4)
- [ ] Folder structure per 00-CORE §5.3
- [ ] `ErpDbContext` + Npgsql wired; `InitialCreate` migration applied
- [ ] Serilog, JWT, Swagger, HealthChecks, ProblemDetails in `Program.cs`
- [ ] `IUnitOfWork` + `UnitOfWork` (transaction boundary)
- [ ] Generic repository base + interfaces
- [ ] `ICurrentUser` (audit stamp from token `sub`)
- [ ] ProblemDetails middleware + domain exception → `code` mapping (System/Errors)

## 1. Master Data
- [ ] Item: entity + config + enums (ItemType, TrackingMode)
- [ ] Item: repository + service + controller (CRUD, DTOs, ETag)
- [ ] UOM + UOM conversions
- [ ] Category (hierarchy, `?tree=true`)
- [ ] Vendor
- [ ] Warehouse + Bin
- [ ] Item reorder settings (`PUT /items/{id}/reorder`)

## 2. Procurement
- [ ] Requisition (+ lines) + submit
- [ ] RFQ + quotations + comparison
- [ ] Purchase Order: create (auto-approve, `approvalRequired` flag), edit-while-open, approve (no-op), cancel
- [ ] Purchase Return (outbound movement, reason code)

## 3. Goods Receipt
- [ ] GRN create (against PO / direct), over-receipt tolerance
- [ ] GRN confirm → FIFO layer + ledger + PO `qtyReceived` (single UoW txn, Idempotency-Key)
- [ ] Inspection hold release / reject

## 4. Stock Core
- [ ] StockLayer + StockLedger entities/config (ledger append-only)
- [ ] `FifoCostingService` (consume oldest-first with row lock; valuation)
- [ ] Stock enquiry (onHand / available / onHold / inTransit)
- [ ] Ledger query · Valuation query

## 5. Stock Transactions
- [ ] Transfer: create → dispatch (consume, In-Transit) → receive (dest layer, cost-preserving)
- [ ] Adjustment (auto-post, mandatory reason code)
- [ ] Count (cycle/full → enter counts → variance → post)
- [ ] Reorder alerts (query) + suggest requisition

## 6. Cross-cutting
- [ ] Audit log on every mutation (who/when/old→new)
- [ ] Document numbering sequences (per type, per year)
- [ ] Auth: simple in-app login → JWT (`POST /auth/login`)
- [ ] JournalEntryStub emitted per stock movement (data only)
- [ ] Negative-stock policy enforcement (default block)
- [ ] FEFO picking for perishables; block expired / on-hold issue

## Deferred (Phase 2+ — do NOT build now, hooks only)
- [ ] Vendor invoice + three-way match
- [ ] Reservation/allocation fulfilment
- [ ] RBAC policy enforcement + approval workflow activation

## Done
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