docs/archive/README.md

@@ -30,7 +30,14 @@ All files below were classified `HISTORICAL_EVIDENCE + SAFE` during the Phase 1B
 | `docs/archive/experiments/context-routing/` | Document-role review (classification/routing analysis) | 1 file (document-role-review.md) |
 | `docs/archive/experiments/pre-RTO/` | Pre-Return-to-Origin experiments and version-specific docs: v0.5–v0.7 | 7 files (pre-RTO experiments + release notes/UX pass) |
 
-**Not moved in Phase 2B:** experiment-60b{1–8}, experiment-60b{19–48}, checkpoint-60b93.md, experiment-57* family, experiment-60b{1–8} (carried forward), docs/design-evolution-log.md, docs/investigation-state-assessment*.md, architectural-principles.md, v0.6-reasoning-architecture.md, success-signals.md, failure-modes.md, investigation-narrative.md, behaviour-selection.md, orchestrator-contract.md, reasoning-contract-backlog.md, reasoning-refinement-requirements.md, reasoning-production-path-map.md. These will be reviewed in a later Phase 2C pass.
+**Not moved in Phase 2B:** checkpoint-60b93.md, docs/design-evolution-log.md, docs/investigation-state-assessment*.md, architectural-principles.md, v0.6-reasoning-architecture.md, success-signals.md, failure-modes.md, investigation-narrative.md, behaviour-selection.md, orchestrator-contract.md, reasoning-contract-backlog.md, reasoning-refinement-requirements.md, reasoning-production-path-map.md.
+
+**Phase 2D experiment archives (2026-08-19):** After Phase 2C carry-forward verification confirmed all three families SAFE for archival:
+
+| Subdirectory | What Was Moved | Count |
+|---|---|---|
+| `docs/archive/experiments/post-v0.8-investigation/` | Experiment 57 family (post-v0.8 investigation) | 69 files (experiment-57* family) |
+| `docs/archive/experiments/decision-closure-integration/` | Experiment 60B subfamilies {1–8}, {19–48} | 37 files (experiment-60b{1-8}, experiment-60b{19-48}) |
 
 ## Superseded Files