# Retrospective — Cycle 15 (2026-06-26)

**Tasks**: AZ-1132 (FluentValidation bump, 1 SP). **1 task, 1 SP, 1 batch.**
**Mode**: cycle-end. Steps 14–16 **skipped** (dependency-only; no new attack surface or perf path).
**Previous retro**: `retro_2026-06-26_cycle14.md`

## Implementation Summary

| Metric | Cycle 15 | Δ vs cycle 14 |
|--------|----------|---------------|
| Tasks implemented | **1** | unchanged |
| Total complexity delivered | **1 SP** | unchanged |
| Blocked tasks | **0** | unchanged |
| Auto-fix attempts | **0** | unchanged |

## Quality

| Gate | Result |
|------|--------|
| Code review | PASS (batch_01_cycle15 — dependency-only) |
| Step 11 full suite | **PASS** (`run-tests.sh`, 457 unit + integration) |
| Step 12 traceability | **PASS** — AZ-1132 AC-1..AC-5 rows added |
| Step 13 docs ripple | **PASS** — `ripple_log_cycle15.md`; version pins in module-layout, error-shape, architecture |
| Step 14 security | **SKIPPED** (dependency-only; D-AZ795-1 closed in implementation batch artifacts) |
| Step 15 perf | **SKIPPED** (dependency-only precedent) |
| Step 16 deploy | **SKIPPED** |

## Cycle 15 delta

- **D-AZ795-1 closed** — cycle 14 retro Action #1 shipped as sole cycle theme; last open Low prod dependency from AZ-795 footprint resolved.
- **Zero behavioral delta** — validator unit (144) + full integration suite green; no contract version bump required.

## Top 3 Improvement Actions (cycle 16 candidates)

1. **Perf gate preflight** — script-check or document perf compose stack health before PT-01 (~0.5 SP) — carried from cycle 14
2. **PT-09 shell harness promotion** — optional hardening of inventory perf sub-check (~0.5 SP) — carried from cycle 14
3. **Ripple version pins on dependency bumps** — extend AZ-1132 doc ripple checklist to `module-layout.md` + `architecture.md` + `error-shape.md` in the implement batch closure template (~0 SP process)

## Cycle 15 Verdict

**Successful dependency-hygiene cycle** — FluentValidation production pin at 12.1.1; security posture no longer PASS_WITH_WARNINGS on D-AZ795-1. Full regression green.