# Retrospective — Cycle 10 (2026-06-25)

**Tasks**: AZ-1113 (REST 400 error sanitizer, 2 SP). **1 task, 2 SP, 1 batch.**
**Mode**: cycle-end (autodev Step 17). Step 16.5 (Release) **skipped** — no `scripts/deploy.sh` / `_docs/04_release/` harness (same pattern as cycles 1–9).
**Previous retro**: `retro_2026-06-25_cycle9.md`

## Implementation Summary

| Metric | Cycle 10 | Δ vs cycle 9 |
|--------|----------|--------------|
| Tasks implemented | **1** | -1 |
| Batches executed | **1** | unchanged |
| Total complexity delivered | **2 SP** | -6 SP |
| Avg tasks / batch | **1** | -1 |
| Blocked tasks | **0** | unchanged |
| Implementation report | **YES** (`implementation_report_rest_error_sanitizer_cycle10.md`) | maintained |

## Quality Metrics

### Code Review

| Verdict | Count |
|---------|-------|
| PASS | **1** (batch 01) |
| FAIL | 0 |

No review findings — single-task security hardening with focused tests.

### Security Audit (Step 14)

| Finding | Status |
|---------|--------|
| F-AZ795-1, F-AZ795-2, F-AZ810-1 | **Resolved** (AZ-1113) |
| F-AZ810-2, D-AZ795-1, D2-cy4 | Open (cumulative PASS_WITH_WARNINGS) |

Cycle 9 retro Action #3 shipped this cycle — first direct cross-cycle security debt closure.

### Test & Perf Gates

| Gate | Result |
|------|--------|
| Step 11 functional | **PASS** — 450/450 unit + integration |
| Step 15 perf | **PASS** — 8/8 after PT-07 harness fix (runs 1–2 failed on marginal p95 noise) |

## Efficiency

| Blocker | Resolution |
|---------|------------|
| Host port 5433 (perf) | `docker-compose.perf.yml` with `ports: !reset []` |
| PT-07 false FAIL (×2) | Queue drain + dual pass criterion (p95 or p50) in harness + `performance-tests.md` |

## Trend Comparison

| Metric | Cycle 9 | Cycle 10 | Change |
|--------|---------|----------|--------|
| Code review FAIL rate | 0% | 0% | unchanged |
| Security Low resolved (delta) | 0 | **3** | improved |
| Perf scenarios pass | 8/8 | 8/8 | unchanged |
| Project count | 10 | 10 | unchanged |
| gRPC perf verified | No | No | unchanged gap |

## Top 3 Improvement Actions

1. **Document `docker-compose.perf.yml` in deployment docs** (~0.5 SP): add host-port conflict playbook to `_docs/02_document/deployment/containerization.md` — file exists from cycle 10 but is undocumented (cycle 9 retro Action #1 partial completion).
   - Impact: operators and autodev Step 15 don't rediscover 5433 conflict
   - Effort: low

2. **F-AZ810-2 `DateTime` → `DateTimeOffset` on `capturedAt`** (~1 SP): closes last cycle-10 security carry-over; wire contract already documents ISO-8601 offset.
   - Impact: cumulative security verdict → PASS
   - Effort: low

3. **PT-10 gRPC stream perf scenario** (~3 SP): `DeliverRouteTiles` time-to-first-chunk + total stream duration (cycle 9 Action #2, still open).
   - Impact: closes Unverified gRPC NFR gap
   - Effort: medium

## Suggested Rule/Skill Updates

| File | Change | Rationale |
|------|--------|-----------|
| `run-performance-tests.sh` / `performance-tests.md` | PT-07 dual criterion now canonical — document in test-run perf mode | Cycle 10 false FAILs |
| `containerization.md` | Perf/test compose overlay section | Recurring 5433 blocker |

## Cycle 10 Verdict

**Successful hardening cycle** — three long-standing Low information-disclosure findings resolved with green gates. Release deferred (no harness); commit/push remains operator action. PT-07 harness improved for future cycles.