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diff-review

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Get Codex's code review of git changes after Claude makes edits. Trigger when user wants a second opinion on code changes ("have Codex review my changes", "get code review from Codex", "review this diff with Codex"), or as a final check before committing.

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Marketplace

robbyt-claude-skills

robbyt/claude-skills

Plugin

codex

Repository

robbyt/claude-skills
39stars

plugins/codex/skills/diff-review/SKILL.md

Last Verified

February 2, 2026

Install Skill

Select agents to install to:

Scope:
npx add-skill https://github.com/robbyt/claude-skills/blob/main/plugins/codex/skills/diff-review/SKILL.md -a claude-code --skill diff-review

Installation paths:

Claude
.claude/skills/diff-review/
Powered by add-skill CLI

Instructions

# Diff Review via Codex

Have Codex review git changes for a second perspective on code quality.

## CRITICAL: Default Model

**ALWAYS use `model: "gpt-5.2"`** unless the user explicitly requests a different model. Do NOT choose `o3` or other models on your own.

## CRITICAL: Instruct Codex

Every prompt sent to Codex MUST include these instructions:

> "You are running non-interactively as part of a script. Do not ask questions or wait for input. Do not make any changes. Provide your complete feedback immediately."

Codex is a consultant. Claude Code handles all file modifications.

## Quick Start (MCP)

If the `codex` MCP tool is available, first save the diff then review:

```bash
git diff --cached > codex-review.diff
```

```
mcp__plugin_codex_cli__codex({
  "prompt": "You are running non-interactively as part of a script. Do not ask questions or wait for input. Do not make any changes. Provide your complete feedback immediately.\n\nReview the code changes at codex-review.diff for bugs, security issues, and style problems.",
  "sandbox": "read-only",
  "model": "gpt-5.2"
})
```

```bash
rm codex-review.diff
```

## Fallback (Bash)

If MCP is unavailable, use shell commands:

```bash
git diff --cached > codex-review.diff
codex exec "You are running non-interactively as part of a script. Do not ask questions or wait for input. Do not make any changes. Provide your complete feedback immediately.

Review the code changes at codex-review.diff for issues." --sandbox read-only -m gpt-5.2-codex 2>&1
rm codex-review.diff
```

Or use the built-in review command:

```bash
codex review --uncommitted 2>&1
```

Note: The review command is scoped to diffs and doesn't support `--sandbox`.

## Patterns

**Staged changes:**
```
mcp__plugin_codex_cli__codex({
  "prompt": "You are running non-interactively as part of a script. Do not ask questions or wait for input. Do not make any changes. Provide your complete feedback immediately.\n\nReview codex-review.diff for:\n1. Bugs or log

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