codex-claude-loop

name	codex-claude-loop
description	Orchestrates a dual-AI engineering loop where Claude Code plans and implements, while Codex validates and reviews, with continuous feedback for optimal code quality. "듀얼 AI", "코덱스 루프", "교차 검증", "dual AI", "cross review", "codex loop" 키워드에 반응.

Codex-Claude Engineering Loop

Claude가 설계/구현하고, Codex가 검증/리뷰하는 듀얼 AI 엔지니어링 루프.

Available Models

Model	Description	Use Case
gpt-5.2-codex	최신 에이전틱 코딩 모델 (기본값)	Plan 검증, 코드 리뷰
gpt-5.1-codex-mini	경량 비용 효율 모델	빠른 검증, 간단한 리뷰
gpt-5.1-codex-max	확장 에이전틱 코딩 모델	대규모 아키텍처 리뷰

Core Loop

Plan (Claude) → Validate (Codex) → Feedback →
Implement (Claude) → Review (Codex) →
Fix (Claude) → Re-validate (Codex) → Repeat until perfect

Phases

Phase	Actor	Action
1. Planning	Claude	Detailed plan, step breakdown, assumptions
2. Plan Validation	Codex	Logic errors, edge cases, architecture, security
3. Feedback Loop	Both	Refine plan based on Codex feedback, re-validate
4. Execution	Claude	Implement with Edit/Write/Read tools
5. Cross-Review	Codex	Bug detection, performance, best practices
6. Iteration	Both	Fix → re-validate → repeat until quality met

Phase 2: Codex Validation Command

echo "Review this implementation plan and identify any issues:
[plan]
Check for: Logic errors, Missing edge cases, Architecture flaws, Security concerns" \
| codex exec -m <model> --config model_reasoning_effort="<level>" --sandbox read-only

AskUserQuestion first: model (gpt-5.2-codex (Recommended) / gpt-5.1-codex-mini / gpt-5.1-codex-max) + reasoning (low/medium/high)

Phase 6: Resume for Iteration

echo "Review the updated implementation" | codex exec resume --last

Resume inherits all settings from original session.

Command Reference

Phase	Command	Purpose
Validate plan	echo "plan" | codex exec --sandbox read-only	Logic check before coding
Implement	Claude Edit/Write/Read tools	Execute validated plan
Review code	echo "review" | codex exec --sandbox read-only	Validate implementation
Continue	echo "next" | codex exec resume --last	Continue session
Re-validate	echo "verify" | codex exec resume --last	Re-check after fixes

Recovery

Situation	Action
Codex finds problems	Claude analyzes → fixes → re-sends to Codex
Implementation errors	Claude adjusts strategy → re-validates with Codex
Architectural changes needed	AskUserQuestion before proceeding
Multiple files affected	Confirm approach with user

Best Practices

#	Practice
1	Always validate plans before execution
2	Never skip cross-review after changes
3	Maintain clear handoff between AIs
4	Document who did what for context
5	Use resume to preserve session state

Error Handling

#	Rule
1	Stop on non-zero exit from Codex
2	Summarize feedback → AskUserQuestion for direction
3	Confirm with user before significant/breaking changes
4	Evaluate warning severity before deciding next steps