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  - docs/internal_guide/code_review/review_002/REVIEW-002-FINDINGS.adoc                                                                                                  
  - docs/internal_guide/code_review/review_002/REVIEW-002-SUMMARY.adoc              
                                                                                                                                                                       

  Findings are calibrated against the actual current source tree and guard suite, not just the wave narrative — I verified key seams in live code (e.g. the L1 bo[0/1929]
  guard, json.dumps meta-blob at layout_composer.py:309, the per-pass module split, the new fk_helpers/discriminator_split packages, and the still-live IR-006 mutation  
  at frame_selection.py:198 / layout_composer.py:230).                               
                                                                                                                                                                         
  == Major architectural conclusions                                                                                                                                     

  1. Hexagonal architecture is now enforced, not aspirational. REVIEW-001's single CRITICAL layer violation (D-001/IR-002) is closed and the domain/core ⊥
  rendering/io_backends boundary is an executable guard.                                                                                                                 
  2. Roundtrip fidelity is materially safer. Meta-blob is deterministic JSON with an accepted ADR and NaN/nested test coverage — the silent-corruption risk is gone.
  3. The adapter boundary is proven by a second backend (ODS). XLSX and ODS both sit behind spreadsheet_contract.py with symmetric contract guards — strong evidence the 
  IR layer is a real abstraction, not XLSX-shaped.                                                                                                                       
  4. Refactoring discipline is the headline gain. Package splits are behavior-preserving (AST-equivalence), surface-preserving (re-export, zero external edits),         
  guard-protected, and analysis-driven — over-engineering is actively policed (GDR, single inventory, rejected over-aggressive rewrites).
  5. Registry/metadata thinking is mature and restrained — registries document deliberate coupling; generic_ir.adoc explicitly refuses a "universal meta engine".        
                                                                                                                                                                         
  == Most important unresolved structural hotspots                                                                                                                       
                                                                                                                                                                         
  1. Render-input mutation (IR-006) — confirmed live and untouched (frame_selection.py:198, layout_composer.py:230); a latent correctness bug. Fix surgically, do not
  refactor.                                                                                                                                                              
  2. Oversized modules — regressed in absolute terms. Peak is now 801 lines (xref_crosstable.py) vs REVIEW-001's 725; ~13 files >430 lines vs nine >440. Feature velocity
   outran modularization; FTR-MODULE-SPLIT-CLEANUP-P3D still Open.                   
  3. Domain finding-model duality (D-005) — two parallel validation error models still coexist.
  4. Compat residue (D-009) — legacy branches in core/fk.py/core/refs.py (low risk; core/fk.py is now guard-load-bearing, so treat conservatively).
  5. Doc lag — ARCH-LAYERS.adoc and the guard inventory trail the code; the meta conflict/precedence space is inherent complexity, correctly deferred — explicitly do not
   pre-empt it.                                                                                                                                                          
                                                                                    
  == Architecture trend since REVIEW-001                                                                                                                                 
                                                                                    
  POSITIVE — clearly, with one named caveat. Both CRITICAL findings closed and guarded, boundaries now executable, a second backend validating the abstraction, and a
  safe repeatable refactoring process established — these are structural and durable. The single caveat is that module-size debt grew during the feature wave and IR-006 
  plus doc lag persist; these are localized, accidental, and now cheaply repayable residues that qualify the positive trend without negating it. The project moved from
  "hexagonal by intention, partially enforced" to "hexagonal by enforcement, safely evolvable" — a trajectory of consolidation and hardening, not fragmentation.         

✻ Cooked for 13m 27s                                                                                                                                                     

