docs: preserve MITC4 prep failure and recovery plan

docs/mitc4-shell-feast-eigen/FEATURED_AGENTS.md

@@ -54,11 +54,13 @@ Reference artifact와 공통 정책은 수정하지 않는다. 외부 solver 실
 | [io-mapping.md](io-mapping.md) | io-definition-agent | r2 | 책임·candidate 보존·TXT Value-only·27개 요구/11개 I/O 검증 obligation |
 | [implementation-plan.md](implementation-plan.md) | implementation-planning-agent | r2 | Prep 1/main 8개 step 및 실행 계획 gate pass |
 | [implementation-environment.md](implementation-environment.md) | implementation-planning-agent | r2 | 실제 backend·유한 deadline·bootstrap/activation·Git/사후 evidence 경계 |
+| [implementation-recovery.md](implementation-recovery.md) | implementation-planning-agent | r2 | actual blocked 보존·guarded WIP checkpoint·별도 Correction·조건부 승인/status/activation 계획 감사 완료 |
 | [implementation-interfaces.md](implementation-interfaces.md) | implementation-planning-agent | r2 | 기존 확장점·API/source-test·vendor/state/transaction 책임 |
 | [implementation-verification.md](implementation-verification.md) | implementation-planning-agent | r2 | 요구27/NR27/I/O11·신규 test40·독립 oracle·fresh evidence·실제 validator |
-| [phases/index.json](../../phases/index.json) | implementation-planning-agent(정의), Executor(진행) | r2 | 기존5개 entry/history 보존 및 이번2개 pending entry 등록 |
-| [prep index](../../phases/mitc4-shell-feast-eigen-execution-prep/index.json) | implementation-planning-agent(정의), Executor(진행) | r2 | Step0 pending; exact owned paths 검증 |
-| [prep step0](../../phases/mitc4-shell-feast-eigen-execution-prep/step0.md) | implementation-planning-agent | r2 | Timeout-only 운영 준비/TDD/full VERIFY; 실행 미완료 |
+| [implementation-prep-evidence.md](implementation-prep-evidence.md) | implementation-agent | r2 | actual attempt1 blocked 보고서; 두 실패·마지막 test 수정의 미검증 구분은 coordination raw audit 참조 |
+| [phases/index.json](../../phases/index.json) | implementation-planning-agent(정의), Executor(진행) | r2 | 기존5개 보존; prep blocked/main pending |
+| [prep index](../../phases/mitc4-shell-feast-eigen-execution-prep/index.json) | implementation-planning-agent(정의), Executor(진행) | r2 | Step0 blocked; actual attempt1/history 보존 |
+| [prep step0](../../phases/mitc4-shell-feast-eigen-execution-prep/step0.md) | implementation-planning-agent | r2 | 유한 deadline 및 재현 classifier 오탐의 최소 TDD/full VERIFY; 별도 Correction 후 재개 |
 | [main index](../../phases/mitc4-shell-feast-eigen/index.json) | implementation-planning-agent(정의), Executor(진행) | r2 | Step0~7 pending; exact owned paths 검증 |
 | [main step0](../../phases/mitc4-shell-feast-eigen/step0.md) | implementation-planning-agent | r2 | Frequency model/parser |
 | [main step1](../../phases/mitc4-shell-feast-eigen/step1.md) | implementation-planning-agent | r2 | 공변 stabilization/static 회귀 |