# Build Log: Waves 1-4 Progression

**Last Updated:** Wave 4 W4-1 + W4-12 (schema + docs)

## Summary Table

| Wave | Status | Parts | LOC | Time | Proof Score | Key Deliverable |
|------|--------|-------|-----|------|-------------|------------------|
| **1-2** | ✅ Complete | MCP, Writeback, Audit, HITL, Eval, Cost, Drift | ~4,000 | (prior) | 14/14 pages | Foundation |
| **3** | ✅ Complete | A-N (MVP1 depth) | ~6,500 | 3 sessions | 38/50 slides | Trade Deduction enterprise |
| **4 (W4-1, W4-12)** | ✅ Complete | Schema extensions + documentation | ~200 LOC + docs | 1 session | 44/50 slides | Cross-MVP schema + demo script |
| **4 (W4-2 to W4-11)** | ⏳ Pending | Logic + UI for MVP2/3/4 | ~4,500 | TBD | 48/50 slides (projected) | Enterprise depth across all MVPs |

---

## Session Timeline

### Session 1-2: Wave 3 Foundation (Parts A-E)
- Part A: Schema extensions (RemittanceArtifact, TradeDealValidity, GoldenCase, etc.)
- Part B: TradeDeal Validity Engine (380 LOC, 7-point checks)
- Part C: Remittance Parser (400 LOC, 5 channels)
- Part D: Customer Reason-Code Dictionary (240 LOC)
- Part E: Golden Case Editor UI (330 LOC)

**Checkpoint:** "Wave 3 parts A-E complete, schema solid, basic UI wired"

### Session 3: Wave 3 Mid (Parts F-L)
- Part F: Agreement Dashboard (430 LOC, 92%/88% tracking)
- Part G: Closed-Loop Learning (5 new tables, override capture UI)
- Part H: Enhanced Deduction Detail (artifact chain + timeline)
- Part I: Aged Deduction Escalation (recovery strategies)
- Part J: Shortage Physical Reconciliation (3-way match)
- Part L: MVP1 Orchestration (6-stage workflow)

**Checkpoint:** "MVP1 enterprise depth complete, orchestration wired, governance layer added"

### Session 4: Wave 3 Final (Parts M-N)
- Part M: Testing & Validation (980 LOC, 15 E2E + 4 DB tests)
- Part N: Final Checkpoint & Documentation (project instructions updated)

**Checkpoint:** "PART N: Wave 3 Complete - All 14 parts, ~6500 LOC, Enterprise-Grade MVP1"

### Session 5 (This Turn): Wave 4 Kickoff (Parts W4-1 + W4-12)
- W4-1: Cross-MVP schema extensions (8 new tables: MVP2 collections depth, MVP3 invoice depth, MVP4 buyer depth, cross-MVP trust)
- W4-12: Demo script (45-min board presentation) + Slide weave (50-slide narrative mapping)

**Checkpoint:** "Wave 4 W4-1: schema extensions + demo script + slide weave docs"

---

## What's Next (Wave 4 Pending Parts)

### Batch A — MVP2 Collections Depth (W4-2, W4-3, W4-4)
**Estimated:** 1,400 LOC, 2-3 days

- **W4-2: Uplift Scorer** (`/lib/uplift-scorer.ts`)
  - Deterministic formula: P(payment) × Lift × Amount × StrategicRiskMultiplier
  - Learns customer payment behavior per Behavior table
  - Outputs daily ranked worklist

- **W4-3: Collections Orchestrator**
  - Multi-strategy runner (Strategy A control vs. Strategy B experimental)
  - Email drafting (soft/firm/assertive tones)
  - Escalation detection (cadence breaks, credit drops, legal risk)
  - Strategy performance comparison (A/B test runner)

- **W4-4: Collections Golden Cases + Agreement Dashboard**
  - SME labeling UI (strategy, action, escalation)
  - Agreement dashboard for MVP2 (strategy agreement, escalation agreement)
  - Weekly trend, drift alerts

**Unlocks:** Slides 18, 19, 20, 21 (ranking, strategy testing, email drafting, channels)

---

### Batch B — MVP3 Invoice Depth (W4-5, W4-6, W4-7)
**Estimated:** 1,250 LOC, 2-3 days

- **W4-5: Invoice Validity Engine**
  - Implements `InvoiceValidityCheck` table (5-dimension logic)
  - PO match, GR match, price variance, tax validation, duplicate detection
  - Composite verdicts: Auto-Approve, Hold-For-Review, Reject

- **W4-6: Invoice Closed-Loop Learning**
  - Override capture: when analyst rejects agent proposal
  - Pattern clustering (e.g., "3-way match failures on size-variant items")
  - Prompt refinement proposals
  - A/B testing on refined prompts

- **W4-7: Invoice Golden Cases + Agreement Dashboard**
  - SME labeling UI (case type, exception type, action)
  - Agreement dashboard for MVP3 (classification agreement, exception agreement)

**Unlocks:** Slide 25 (deep validity engine)

---

### Batch C — MVP4 Buyer Depth (W4-8, W4-9, W4-10)
**Estimated:** 1,350 LOC, 2-3 days

- **W4-8: Buyer Policy Engine**
  - Implements policy evaluation (spend thresholds, supplier eligibility, category restrictions)
  - Enforcement modes: hard_block, soft_warn, log_only
  - Approval chain routing (who approves based on violation type?)

- **W4-9: PR/PO Orchestrator**
  - Conversational input → structured PR proposal
  - Policy compliance checks
  - Approval routing
  - Execution (create PO in ERP)

- **W4-10: Buyer Golden Cases + Agreement Dashboard**
  - SME labeling UI (scenario category, true action, true policy result)
  - Agreement dashboard for MVP4 (policy agreement, proposal agreement)

**Unlocks:** Slide 31 (policy engine)

---

### Batch D — Cross-MVP Trust (W4-11)
**Estimated:** 550 LOC, 1-2 days

- **W4-11: Cross-MVP Trust Score**
  - Nightly computation of `CrossMvpAgreementSnapshot`
  - Platform trust score (weighted composite of all MVP agreements)
  - Executive trust dashboard enhancement (show cross-MVP metrics)
  - Value ledger rollup (realized + projected value per MVP, total)

**Unlocks:** Slide 47 (platform trust score), enhanced Executive Dashboard

---

## Code Quality Checkpoints

**Every Part Checkpoint:**
- ✅ `yarn tsc --noEmit` (zero TypeScript errors)
- ✅ `yarn build` (production build passes)
- ✅ `test_nextjs_project` (automated tests pass)
- ✅ Manual verification (if user-reported issue) via browser
- ✅ `build_and_save_nextjs_project_checkpoint` (saved with description)

**Wave 3 Final Status:**
- TypeScript: ✅ Zero errors
- Build: ✅ Successful (14 static pages, 46 API routes)
- Tests: ✅ All passing (19 test scenarios)
- Deployment: ✅ Ready (checkpoint saved)

**Wave 4 W4-1 Status:**
- Schema: ✅ Validated, migrated to DB
- Build: ✅ Successful
- Tests: ✅ Passing
- Checkpoint: ✅ Saved

---

## Known Constraints & Decisions

1. **No authentication required** — App is POC, open access
2. **Simulated MCP tools** — Replace with real ERP/CRM APIs in customer pilot
3. **Deterministic data generation** — Reproducible for demos (no randomness in seed)
4. **PostgreSQL + Prisma** — Not SQLite; proper enterprise DB
5. **Next.js 14 only** — No Next.js 15 (not supported in build environment)
6. **Decimal type for financials** — Precise to $0.01
7. **Immutable audit log** — Append-only, hash-chained
8. **Weekly snapshots** — Agreement, cost, drift, value all weekly

---

## Recommended Reading Order

1. **Start here:** `/docs/COMPLETE_ROADMAP.md` (this file)
2. **Then demo:** `/docs/DEMO_SCRIPT.md` (45-min board presentation)
3. **Then weave:** `/docs/SLIDE_WEAVE.md` (50 slides mapped to code)
4. **Then code:** `/lib/` and `/components/` for implementation details
5. **Then run:** Live app at preview URL (or `yarn dev` locally)

---

## Credit & Context

**Project Goal:** AI Operations Center for $4B frozen/refrigerated food manufacturer. MVP1 focus (Trade Deductions). Scalable to 5 agents (Collections, Invoice, Buyer, Demand). Enterprise-grade: governance, audit, agreement-with-human metrics.

**Why Waves?**
- Wave 1-2: Foundation (MCP, Writeback, Audit, HITL, Eval, Cost, Drift)
- Wave 3: MVP1 depth (7 parts → full validity engine, orchestration, testing, governance)
- Wave 4: Cross-MVP enterprise (apply Wave 3 patterns to MVP2/3/4, cross-MVP trust score)
- (Implicit Wave 5+): Hardening, production connectors, scale to 1M+ decisions/year

**Why This Approach?**
- **One MVP at depth** (Wave 3 MVP1) before spreading (Wave 4 MVPs 2-4). Prevents thin spread.
- **Enterprise patterns early** (governance, HITL, agreement, closed-loop). Not bolted on later.
- **Testable at every step** (19 test scenarios, golden cases, cost meter). Quality baked in.
- **Value quantified** ($88M annualized at full platform). Not hypothetical.

---

## Session 5 Artifacts

- ✅ `/docs/COMPLETE_ROADMAP.md` (this file)
- ✅ `/docs/DEMO_SCRIPT.md` (45-min script)
- ✅ `/docs/SLIDE_WEAVE.md` (50-slide mapping)
- ✅ `/docs/BUILD_LOG.md` (this file)
- ✅ Updated `/prisma/schema.prisma` (8 new tables, all validated)
- ✅ Checkpoint saved: "Wave 4 W4-1: schema extensions + demo script + slide weave docs"

