---
name: Codex Architect
slug: codex-architect-2
category: AI Engineering
description: Codex Architect provides architecture advice, design recommendations, and comparison guidance for feature planning or evaluating solutions. Use it for second opinions on technical design, not implementation or code review.
github: "https://github.com/sd0xdev/sd0x-harness/tree/main/skills/codex-architect"
language: JavaScript
stars: 188
forks: 24
install: "npx degit https://github.com/sd0xdev/sd0x-harness/tree/main/skills/codex-architect ~/.claude/skills/codex-architect"
installs_to: ~/.claude/skills/codex-architect
source_path: skills/codex-architect/SKILL.md
collection_size: 25
category_size: 3278
collection_url: "https://dirskills.com/collections/sd0xdev/sd0x-harness"
added: 2026-09-06T05:20:12.721Z
last_synced: 2026-09-06T05:20:12.721Z
canonical_url: "https://dirskills.com/skills/codex-architect-2"
---

# Codex Architect

Codex Architect provides architecture advice, design recommendations, and comparison guidance for feature planning or evaluating solutions. Use it for second opinions on technical design, not implementation or code review.

**Install:**

```bash
npx degit https://github.com/sd0xdev/sd0x-harness/tree/main/skills/codex-architect ~/.claude/skills/codex-architect
```

## README

# 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

```bash
/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 dispatching per `@skills/codex-code-review/references/codex-transport.md` § Start, the prompt must include the following:

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 the project structure by discovering it: `ls` at the repository root, then list the directories it actually shows — do not assume a `src/` or `test/unit/` layout; many repositories, this one included, have neither
2. Search related modules: `grep -rn "keyword" . -l | head -10` — rooted at the repository, or at a directory the discovery step above actually surfaced; never at an assumed `src/`
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)


## 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
```