---
name: s103-h20-crystallized-backfill-review
description: S103 WF2 Lane-B review (fable-clone ensemble) of H20 fix-all-structure + crystallized-backfill adap — PASS, 2 non-blocking CONCERN. Read when reviewing governance-doc fidelity or fix-all-structure dogfood.
metadata:
  type: project
---

**S103 (2026-07-06) H20+crystallized-backfill WF2 Lane-B — governance-doc fidelity + fix-all-structure dogfood · self=reviewer · fable-clone ensemble H19. Verdict: PASS (0 BLOCKING, 2 CONCERN).**

Scope: 6 broadcast adap (H20 fix-all `bd714a33` + full-recheck-F1-F4 `94c78d1d` + session-cmd-budget-runloop `d47333e0` + H16-nokey `a1dc3a20` + hygiene-A/B/C `43c9e56f` + consolidation `5bba339b`). Deliverables: engine §L+§M, 2 scripts (crystallized-backfill.ps1 + applied-eval-nokey.ps1), memory-budget.json block, session-start §2.1.6 + session-end §L.b(c) wiring, model-note sweep 4 spots.

**Hash re-computed indep** (PS .NET UTF8, split-on-`^---$` regex take-3rd + strip-1-leading-newline): all 6 MATCH (full-64 on the 4 declaring full). Q4 PASS.

**Q1 §L fidelity:** 4-layer NHÌN/NGUỒN/DẤU/DẪN-XUẤT + PERSONA (5th, = broadcast F2 toxic-layer emphasis) present · anti-asymmetric ordering "đủ-tầng>không-sửa>sửa-lệch-tầng" verbatim broadcast §2 · 4-step (L.B) + 2-head cross-axis (L.B) present · 0 floor dropped vs bd714a33.

**Q2 §M fidelity:** F4 5-floors all present (default-0=OFF / NOT-sub / calibrated-range [bytes/4..bytes/3.0] / precondition target>0 AND headroom>0 / value-gated source-order) · crystallization≠backfill DISTINCT (OPPOSITE direction: engine §I distill=compress-toward-source vs §M=fill-empty-budget) · budget-table (M.B) · run-loop 2-tier (M.C, honestly "largely already-met §L.b") · no-key mechanism (M.D, honestly "MECHANISM built, numbers DEFERRED") · hygiene A/B/C mapped (M.F: C=n/a-by-JS-sandbox-architecture, not CLI-launcher) · 0 floor dropped.

**Scripts REAL teeth (5 fault-inject `-RepoRoot` temp-tree):** (1) target=0→backfill=0 OFF · (2) target=5000+pos-headroom→backfill=5000 opens · (3) target>headroom→headroom-binds(67) · (4) NEG-headroom(tiny cap)→backfill=0 = broadcast borderline near-cap case · (5) -Tier sub→NOT-FOR-SUB warn fires. applied-eval selftest EXIT-0 3/3 (control-HIGH→BLOCK · control-LOW→PASS+Applied%=70 · control-null→BLOCK; `$script:`-scope flip survives nested Assert-Case = fault-inject-caught real bug per header).

**Q3 fix-all-structure dogfood VERIFIED:** 4 spots correct — README:3 + session-start:37 (BƯỚC 0.6) + session-end:113 (release-line) → S103-Opus; engine §G.5 → 220K neo-superseded (present 7×, NOT deleted; 380K override present 5×). History-saga NOT rewritten: README:12 H8-caveat UNCHANGED (README diff = 1-line-only = line-3), adap-reports 2026-06-10/06-13 dated-snapshots preserved (LỊCH-SỬ/SNAPSHOT, correctly kept). Persona-layer (the F2 toxic layer, `.claude/agents/*.md`) clean of stale steady-Fable current-claim.

**2 CONCERN (non-blocking):**
1. STATUS:24 Sub-agents row + STATUS:6/HANDOFF:5 last-updated still read S102-Fable / S101 as latest current-state (not yet S103-Opus). Engine §L.D EXPLICITLY defers STATUS/HANDOFF mega-line current-claim to session-end blurb (natural update-point). NOT persona (not reloaded per spawn) → tailoring defensible + honestly disclosed. But at review-time (mid-session, pre-session-end) the Sub-agents current-state row IS technically ĐANG-SAI under strict fix-all-structure.
2. tooling-auditor/MEMORY:17 roster-header "Fable 5 RESTORED S98" while line-46 records S103-Opus divergence (data-point #7 DIVERGENT) = header/body tier-lag. Internal diary (not persona, not outward, not in the 4-spot dogfood scope) → NIT-tier.

**KEY honesty-check (resolved-HONEST):** §M.A + budget.json `_hotload_note` claim "real peak ~368K near-cap → real headroom SMALLER" while LIVE crystallized-backfill shows headroom=282384 POSITIVE (~74% free over the 6-file floor: STATUS/HANDOFF/ACTIVE-MARKS/migration-todos/gotchas/agents-README = 292848 bytes → 97616 tok worst-case). Reconciliation SOUND: `_hotload_note` explicitly labels measured_headroom an UPPER-BOUND — the PEAK hot-feed also loads session-variable lead-pasted task-context (docs/code/gotcha-slices) NOT in the fixed file-list, so real peak → ~368K and real headroom SMALLER; matches broadcast F4 "byte/4 undercount + partial-source-list = illusion of room"; target stays 0 BECAUSE of this uncertainty = honest disclosure, NOT overclaim.

**Lesson:** when a planner measures only a FILE-FLOOR subset, verify the doc labels the headroom as UPPER-BOUND — a positive floor-headroom that superficially contradicts a "near-cap" narrative is HONEST iff the partial-source-list caveat is explicit (else it would be an illusion-of-room overclaim). Also: hash-recompute all 6 broadcasts independently (never trust declared frontmatter) — canonical = split-on-`^---$` take-3rd, strip exactly 1 leading newline, SHA256 UTF-8.

Cross-ref: [[wire-claim-verification-anchors]] (sha256 twin-file discipline) · broadcast F2/F3 persona-layer sweep · engine §L/§M (`docs/governance/harness-11-engine.md`).
