Map codebase onto agent-harness component model

.gitignore

@@ -1,6 +1,9 @@
 # Volume data (downloaded via setup_data.py)
 data/volumes/
 
+# Render cache (regenerated from volumes; can reach hundreds of MB)
+data/cache/
+
 # Filmstrip viewer (generated by make_filmstrip.py)
 data/filmstrip/
 

MIGRATION_REPORT.md

@@ -0,0 +1,17 @@
+# Migration Report — Phase B live re-baseline
+
+Generated by `validate_migration.py`. Stages: 1.5fold+2fold+pretzel, n=233 frames (embryos 1–3).
+
+## Leaderboard (new harness)
+
+| Variant | Model | Thinking | mean ± std | N | vs archived |
+|---|---|---|---|---|---|
+| hybrid | claude-opus-4-6 | none | 80.1 ± 4.2 | 3 | 81.7±2.4 (t=-0.63) ✓ |
+| hybrid | claude-opus-4-6 | adaptive | 77.8 ± 1.2 | 3 | — |
+| hybrid | claude-opus-4-7 | none | 57.1 ± 2.4 | 3 | — |
+| hybrid | claude-opus-4-7 | adaptive | 53.1 ± 9.5 | 3 | — |
+
+## Pass criteria
+
+- **No accuracy regression**: hybrid@opus-4-6/none mean within [77, 86] (81.7 ± 2σ from RESEARCH.md).
+- **Provenance**: every result JSON has full config (model, thinking, git_sha, seed) — verified by construction.