# Wave 21 Review Sweep Summary

**Date:** 2026-05-04
**Pass:** 1
**Reviewer:** Architect

| Prompt | Verdict | Required | Recommended | Nits | Verified |
|---|---|---|---|---|---|
| AD-522 v1 (SPC Calibration + WE Rules) | ✅ Approved | 0 | 3 | 3 | 12 |

**Total findings:** 6 (0 Required, 3 Recommended, 3 Nits).
**Tolerance check (relaxed convention #15):** 0 Required, well under the 1-⚠️ ceiling.

## Top failure modes (none reaching Required)

- **Wiring SEARCH/REPLACE missing.** Sections 5 (`config.py` field insertion) and 6 (`finalize.py` `_wire_spc_calibration` def + dispatch) ask the Builder to mirror an established pattern but don't provide explicit anchor blocks. Recommended to add SEARCH/REPLACE blocks anchored on AD-487 (`self_distillation` line) for config.py and AD-539c (`_wire_gap_remediation_tracker`) for finalize.py.
- **Dependencies header / NOT-Change inconsistency.** Header asserts EmergentDetector + PersonalityTraits as "consumed read-only"; body's NOT-Change section says neither is integrated in v1. Reword header to "future-consumer (deferred to AD-522c/d)".
- **Dead defensive code.** Section 2's `__post_init__` first branch (`if not isinstance(self._samples, deque)`) is unreachable given `field(default_factory=deque)`. Collapse to single-branch rebind.

## Pre-check FPs (all confirmed false-positive per dispatch)

- ✅ `runtime.spc_calibration_store` — introduced by Section 4 (Wave 5 conv #1).
- ✅ `SystemConfig.spc` — introduced by Section 5 Pydantic config; no field-name collision in SystemConfig (lines 1837–1949 verified).
- ✅ `WesternElectricRules.check(window_size=)` — kwarg collision with stdlib `check()` is FP; AD-522 introduces this method with this signature.

## Hard-stops

- ❌ v1 scope creep — none. Cp/Cpk, EmergentDetector, moving-range, Holodeck calibration, AD-503/504 Counselor consumption all correctly deferred to AD-522b/c/d/e. ✅
- ❌ Statistical formula error — none. UCL/LCL at 3σ canonical; rules 1–4 match SPC references. ✅
- ❌ Pydantic field name collision — none. `spc` is unused in SystemConfig. ✅

## Disposition

Builder may proceed. Recommended findings improve Builder velocity (explicit anchors) but are not blockers. Nits are optional.

## Statistics correctness ledger

| Item | Verified |
|---|---|
| UCL = mean + 3σ | ✅ canonical Shewhart |
| LCL = mean - 3σ | ✅ canonical Shewhart |
| `statistics.fmean` for mean | ✅ float-fast stdlib |
| `statistics.stdev` (n-1) for σ | ✅ appropriate for sample-window |
| Rule 1: `abs(v - mean) > 3σ` | ✅ canonical |
| Rule 2: 2-of-3 same side >2σ via OR | ✅ mutual-exclusion guarantee in 3-sample window makes OR equivalent to "same side" |
| Rule 3: 4-of-5 same side >1σ via OR | ✅ same mutual-exclusion guarantee in 5-sample window |
| Rule 4: 8 consecutive same side of centerline | ✅ `all_above` or `all_below` |
| Defensive: `sample_count < 8` early-return | ✅ |
| Defensive: `stdev == 0.0` early-return | ✅ |
| `zone()` defensive: `sample_count < 2` or `stdev == 0.0` returns `"unknown"` | ✅ |
