# Phase 13 Sprint C Execution Plan (ACTIVE)

**Sprint C:** 2026-04-26 to 2026-05-09 (2 weeks)
**Status:** INITIATED 2026-03-28
**Priority:** Hardening, E2E Validation, Sign-Off

---

## Executive Summary

Sprint C delivers Phase 13 closure with 4 P0 gate tasks + 3 P1 support tasks. Focus shifts from feature build to observability, validation, and governance. All Sprint B prerequisites cleared (357 tests, 0 failures).

---

## Sprint C Task Matrix

### **WEEK 1: Observability & Monitoring (2026-04-26 to 2026-05-02)**

#### P13-SC-E01: Notification DLQ & Delivery SLO Closure (P0)
**Owner:** Notifications Team + SRE Team
**Deliverables:**
- DeliveryDlq workflow implementation (retry re-drive)
- SLO metrics tracking by channel (push/SMS/email)
- Failure drill tests (simulate delivery failures)
- Production readiness validation

**Dependencies:** P13-SB-E01 ✅
**Key Risks:** Channel provider throttling, SLO threshold setting
**Acceptance Criteria:**
- [ ] DLQ jobs process failed deliveries automatically
- [ ] SLO metrics published to monitoring (push 99%, SMS 98%, email 95%)
- [ ] Failure drill exercises complete with documented recovery
- [ ] No critical findings in DLQ test report

---

#### P13-SC-C01: GL Observability Dashboard (P1)
**Owner:** Observability Team + Reporting Team
**Deliverables:**
- GL posting outcome dashboards
- Variance alerts + exception tracking
- Real-time reconciliation status

**Dependencies:** P13-SB-C01, P13-SB-C02 ✅

---

#### P13-SC-D01: WPS Operational Monitoring (P1)
**Owner:** Operations Team + Observability Team
**Deliverables:**
- Alerts for delayed files, failed posts, variance spikes
- Runbooks for incident response
- Tabletop exercise validation

**Dependencies:** P13-SB-D01 ✅

---

### **WEEK 2: E2E Validation & Sign-Off (2026-05-03 to 2026-05-09)**

#### P13-SC-A01: Reporting & Regulatory E2E Validation (P0)
**Owner:** Reporting Team + Compliance Team
**Deliverables:**
- Scheduled report generation E2E tests
- On-demand report request workflow tests
- Regulatory template compliance acceptance
- Audit trace validation (request → generation → export)

**Dependencies:** P13-SB-A01 ✅
**Key Risks:** Compliance requirements ambiguity
**Acceptance Criteria:**
- [ ] Scheduled reports execute on time, produce valid output
- [ ] On-demand reports complete within SLA (< 5 min for daily, < 30 min for monthly)
- [ ] Regulatory templates pass compliance review
- [ ] Audit traces capture all sensitive report access/export actions

---

#### P13-SC-B01: Dispute/Refund E2E Closure (P0)
**Owner:** Dispute Team + Ledger Team
**Deliverables:**
- Customer-to-admin dispute lifecycle E2E tests
- Refund + reversal financial invariant tests
- SLA tracking validation (escalation on breach)
- Audit trail completeness

**Dependencies:** P13-SB-B01, P13-SB-B02 ✅
**Key Risks:** Financial invariant violations, SLA edge cases
**Acceptance Criteria:**
- [ ] Dispute creation → triage → investigation → resolution workflows operational E2E
- [ ] Refunds preserve ledger double-entry invariant (debit = credit)
- [ ] SLA timers trigger escalations on schedule
- [ ] Audit logs capture all status transitions + approvals

---

#### P13-SC-F01: Security & Policy Conformance (P1)
**Owner:** Security Team + Platform Team
**Deliverables:**
- Privileged action validation (MFA, role checks)
- API contract conformance (idempotency, error envelopes)
- No critical security findings

**Dependencies:** P13-SC-E01, P13-SC-A01, P13-SC-B01
**Acceptance Criteria:**
- [ ] Refund approvals require MFA + 2+ approvers
- [ ] Report exports audit-logged with user + correlation ID
- [ ] Error responses conform to ErrorEnvelope contract
- [ ] Zero CRITICAL/HIGH findings in security scan

---

#### P13-SC-F02: Phase 13 Sign-Off Package (P0)
**Owner:** Program Management + Track Leads
**Deliverables:**
- Evidence checklist (all 50+ artifacts)
- Test summary report (357+ tests, 0 critical failures)
- Stakeholder approvals (Compliance, Finance, Security, Operations)
- Phase 14 transition handoff

**Dependencies:** P13-SC-A01, P13-SC-B01, P13-SC-E01, P13-SC-F01
**Acceptance Criteria:**
- [ ] Evidence checklist 100% complete
- [ ] Zero open critical/high defects
- [ ] Sign-offs captured: Compliance ✓, Finance ✓, Security ✓, Operations ✓
- [ ] Phase 14 readiness documented

---

## Implementation Sequencing

### **Immediate (2026-04-26 week start):**

1. **Create P13-SC-E01 test files**
   - `apps/wallet_notifications/test/wallet_notifications/delivery_dlq_test.exs`
   - `apps/wallet_notifications/test/wallet_notifications/delivery_slo_test.exs`
   - DLQ workflow tests (enqueue, process, re-drive)
   - SLO metric validation tests

2. **Create P13-SC-A01 test files**
   - `apps/wallet_reporting/test/wallet_reporting/report_e2e_test.exs`
   - Scheduled vs on-demand report tests
   - Regulatory template compliance tests
   - Audit trace validation tests

3. **Create P13-SC-B01 test files**
   - `apps/wallet_disputes/test/wallet_disputes/dispute_e2e_test.exs`
   - `apps/wallet_ledger/test/wallet_ledger/refund_invariant_test.exs`
   - Customer → admin lifecycle tests
   - Financial invariant preservation tests
   - SLA escalation trigger tests

4. **Create P13-SC-F02 package**
   - `docs/phase-13-sign-off-package.md`
   - Evidence checklist framework
   - Test summary aggregation script

---

## Test Targets (Sprint C)

| Task | Test File | Target Tests | Status |
|------|-----------|--------------|--------|
| P13-SC-E01 | delivery_dlq_test.exs | 15 | To create |
| P13-SC-E01 | delivery_slo_test.exs | 12 | To create |
| P13-SC-A01 | report_e2e_test.exs | 18 | To create |
| P13-SC-B01 | dispute_e2e_test.exs | 20 | To create |
| P13-SC-B01 | refund_invariant_test.exs | 16 | To create |
| **TOTAL** | **5 test files** | **~80 new tests** | **TBD** |

---

## Gate Criteria (Sprint C)

| Criterion | Target | Evidence |
|-----------|--------|----------|
| **P0 Task Completion** | 4/4 (E01, A01, B01, F02) | Implementation + tests |
| **E2E Test Coverage** | 80+ new tests | All passing, 0 failures |
| **Critical Defects** | Zero open | Test run results |
| **Stakeholder Sign-Off** | 4 sign-offs | Email confirmations |
| **Evidence Package** | 100% complete | Checklist attestation |

---

## Dependencies Verification ✅

**All Sprint B prerequisites cleared:**
- ✅ P13-SB-E01: Multi-channel notification adapters operational
- ✅ P13-SB-A01: Regulatory templates + validation complete
- ✅ P13-SB-B01: Admin dispute operations operational
- ✅ P13-SB-B02: Refund/reversal workflows complete
- ✅ P13-SB-C01: AFEX GL adapter operational
- ✅ P13-SB-C02: GL reconciliation jobs operational
- ✅ P13-SB-D01: WPS salary credit posting operational

**No blockers identified** ✅

---

## Critical Path & Timeline

```
2026-04-26 ──────────── 2026-05-02  ──────────── 2026-05-09
   Week 1                   Week 2

P13-SC-E01 ──────────────────────────> [P13-SC-F02 dependency]
P13-SC-C01 ──────────────────────────>
P13-SC-D01 ──────────────────────────>

                        P13-SC-A01 ──> [P13-SC-F02 dependency]
                        P13-SC-B01 ──> [P13-SC-F02 dependency]
                        P13-SC-F01 ──> [P13-SC-F02 dependency]
                        P13-SC-F02 ──> [PHASE 13 CLOSURE]
```

---

## Success Definition

**Sprint C Complete When:**
1. ✅ P13-SC-E01: DLQ fully operational, SLO > 95% pass rate
2. ✅ P13-SC-A01: All reports validated E2E, compliance approval captured
3. ✅ P13-SC-B01: Dispute/refund E2E validated, financial integrity confirmed
4. ✅ P13-SC-F02: Sign-off package assembled, 4 stakeholder approvals
5. ✅ All tests passing (80+ new tests, 0 failures)
6. ✅ Zero critical/high defects open

**Phase 13 Complete When:**
- Sprint C gate cleared ✅
- Evidence package signed ✅
- Phase 14 transition plan documented ✅

---

## Next Immediate Actions (TODAY)

1. Create test file structure for P13-SC-E01 (DLQ + SLO tests)
2. Implement core DLQ functionality
3. Set up SLO metric tracking framework
4. Begin P13-SC-A01 E2E test implementation

---

**Document Created:** 2026-03-28
**Sprint C Kickoff:** 2026-04-26 (planned)
**Estimated Completion:** 2026-05-09
**Confidence:** HIGH ✅