# Phase 4 — Re-validation (XAM audit)

| gate | result |
|---|---|
| 1. cvar-OFF determinism (3 runs) | **PASS** all 3 = `c6d895829b4611964978990ae1cb8a6a` (SAME as C+6½ baseline) |
| 2. Phase B `image_canonical_sha256` | **PASS** unchanged (no Phase B re-snap needed — no body changes) |
| 3a. Phase A main matched prefix ≥ 102158 | **PASS** 102158 (unchanged) |
| 3b. Phase A all other tid chains | **PASS** no regression — see below |
| 4. Both engines build clean | **PASS** ours: `cargo build --release` ok (only pre-existing dead-code warning) |
| 5. Unit tests | **PASS** 146 passed, 0 failed, 0 ignored, 0 measured |
| 6. Hallucination count | **N/A** — 0 hallucinations found, audit clean |

## Gate 1 — determinism

```
c6d895829b4611964978990ae1cb8a6a  digest-cvaroff-1.json
c6d895829b4611964978990ae1cb8a6a  digest-cvaroff-2.json
c6d895829b4611964978990ae1cb8a6a  digest-cvaroff-3.json
```

Identical to C+6½'s baseline. Confirms the single class-E rewire is
cvar-OFF inert (and indeed `XamShowGamerCardUIForXUID` is not hit in
the 50M Phase A window, so even cvar-ON behavior is unaffected at
this horizon).

## Gates 3a, 3b — Phase A matched-prefix table

| chain | C+6½ | XAM-audit | Δ |
|---|---|---|---|
| canary tid=6 → ours tid=1 (main)   | 102158 | 102158 | 0 (preserved) |
| canary tid=4 → ours tid=11         | 5      | 5      | 0 |
| canary tid=7 → ours tid=2          | 26     | 26     | 0 |
| canary tid=12 → ours tid=7         | 2      | 2      | 0 |
| canary tid=14 → ours tid=9         | 39     | 39     | 0 |
| canary tid=15 → ours tid=10        | (no div) | (no div) | 0 |

**No regressions on any chain. No advances on any chain** — expected,
because XamShowGamerCardUIForXUID is not exercised by the current
boot window.

## Gate 5 — unit tests

`cargo test -p xenia-kernel --release` — 146/146 pass. Same count
as C+6½ (no tests added or modified — XAM audit is rewire-only).

## Phase A capture

`xrs-xamaudit exec -n 50000000 --quiet --phase-a-event-log
audit-runs/phase-c6half-xam-audit/ours.jsonl ...`

Compared against canonical canary log at
`audit-runs/phase-c-first-divergence/phase-a/canary.jsonl`.
Diff at `diff-report.md` (head shown above; identical summary
table to C+6½).