Codex Architect Skill (Third Brain)
Trigger
- Keywords: architecture design, solution evaluation, tech selection, third brain, Codex advice, design consulting, ask Codex, second opinion
When NOT to Use
- Code implementation (use /codex-implement)
- Code review (use /codex-review)
- Deep discussion/exhaustive exploration (use /codex-brainstorm)
Usage
/codex-architect "<question>"
/codex-architect "Evaluate this design" --context src/xxx.ts --mode review
/codex-architect "Redis vs MongoDB?" --mode compare
Modes
| Mode | Purpose | When |
|---|---|---|
| design | Provide design advice | Starting from scratch (default) |
| review | Evaluate existing design | Validate solution, find issues |
| compare | Compare multiple options | Tech selection |
Core Principle
User -> Claude -> Codex -> Integrate
| | |
Initial thinking Third perspective Combined advice
Codex Prompt Template
When using mcp__codex__codex, must include the following:
mcp__codex__codex({
prompt: `You are a senior architect. Please provide architecture advice for the following question.
## Question
${QUESTION}
## Mode
${MODE} (design/review/compare)
## IMPORTANT: You must independently research the project
Before providing architecture advice, you **must** perform the following research:
### Research Steps
1. Understand project structure: \`ls src/\`, \`ls src/service/\`, \`ls src/provider/\`
2. Search related modules: \`grep -r "keyword" src/ --include="*.ts" -l | head -10\`
3. Read existing implementations: \`cat <relevant files> | head -150\`
4. Understand existing architecture patterns and conventions
### Verification Focus
- What does the existing architecture look like?
- What are the existing code style and patterns?
- What similar features can be referenced?
## Output Requirements
1. First describe which files you researched
2. Provide advice based on current project state
3. Consider consistency with existing architecture
...(other review dimensions)`,
sandbox: 'read-only',
'approval-policy': 'never',
});
Workflow Integration
/codex-architect -> /tech-spec -> /review-spec -> /codex-implement -> /codex-review-fast
Design Plan Review Implement Code Review
Verification
- Report includes Codex advice + Claude perspective
- Consensus and divergence points clearly marked
- Final recommendation integrates both perspectives
References
references/project-knowledge.md- Project architecture knowledge + report template
Examples
Input: /codex-architect "How to design a high-concurrency cache?"
Action: Codex analysis -> Claude supplement -> Integrated output
Input: /codex-architect "Any issues with this API design?" --mode review
Action: Codex evaluation -> Claude verification -> Output issues + recommendations
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