Claude Code Agent Development
anthropics/claude-plugins-official
Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
A skill your agent uses to critically self-review your changes, or when you want to delegate the review to a sub-agent.
Install Self Review
$ npx skills add sammcj/agentic-coding --skill self-review -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sammcj/agentic-coding self-review --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/sammcj/agentic-coding.git skills-src && mkdir -p .claude/skills && cp -r skills-src/Skills/self-review .claude/skills/self-review && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "self-review" agent skill from https://github.com/sammcj/agentic-coding/tree/main/Skills/self-review into .claude/skills/self-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "self-review", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/sammcj/agentic-coding/tree/main/Skills/self-reviewType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add sammcj/agentic-coding --skill self-review -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sammcj/agentic-coding self-review --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sammcj/agentic-coding.git skills-src && mkdir -p .agents/skills && cp -r skills-src/Skills/self-review .agents/skills/self-review && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "self-review" agent skill from https://github.com/sammcj/agentic-coding/tree/main/Skills/self-review into .agents/skills/self-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "self-review", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sammcj/agentic-coding --skill self-review -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sammcj/agentic-coding self-review --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sammcj/agentic-coding.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/Skills/self-review .cursor/skills/self-review && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "self-review" agent skill from https://github.com/sammcj/agentic-coding/tree/main/Skills/self-review into .cursor/skills/self-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "self-review", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/sammcj/agentic-coding.git --path Skills/self-review--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add sammcj/agentic-coding --skill self-review -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sammcj/agentic-coding self-review --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sammcj/agentic-coding.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/Skills/self-review .gemini/skills/self-review && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "self-review" agent skill from https://github.com/sammcj/agentic-coding/tree/main/Skills/self-review into .gemini/skills/self-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "self-review", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install sammcj/agentic-coding self-reviewInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add sammcj/agentic-coding --skill self-review -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sammcj/agentic-coding.git skills-src && mkdir -p .github/skills && cp -r skills-src/Skills/self-review .github/skills/self-review && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "self-review" agent skill from https://github.com/sammcj/agentic-coding/tree/main/Skills/self-review into .github/skills/self-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "self-review", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sammcj/agentic-coding --skill self-review -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sammcj/agentic-coding self-review --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sammcj/agentic-coding.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/Skills/self-review .opencode/skills/self-review && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "self-review" agent skill from https://github.com/sammcj/agentic-coding/tree/main/Skills/self-review into .opencode/skills/self-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "self-review", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
self-review- GitHub stars
- 162
- Token cost
- ~792 tokens
- SKILL.md length
- 478 words
- Files
- 1
- Skills in repo
- 64
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
A skill your agent uses to critically self-review your changes, or when you want to delegate the review to a sub-agent.
- Works in 2 steps: Action the (valid) findings. → If you make large amounts of changes,…
- Critically self-review your changes
- SKILL.md covers Option A: Review it yourself… and Option B: Delegate to the…
- Calls git
What it does
Self Review is an agent skill from sammcj/agentic-coding. Use to critically self-review your changes, or when you want to delegate the review to a sub-agent.
Its SKILL.md is about 790 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Agent Workflows, covering Subagents. The repository describes itself as: Agentic Coding Rules, Templates etc... The licence is Apache-2.0.
When your agent uses it
- Critically self-review your changes
- You want to delegate the review to a sub-agent
Example prompts
- “/self-review”
Workflow steps
2 steps, taken from the first numbered list in SKILL.md.
- Action the (valid) findings.
- If you make large amounts of changes, loop back and run another review cycle (maximum loops: 3).
What it can do on your machine
Read from SKILL.md and the folder at commit 2f25ced. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
git
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Self Review loads about 792 tokens when it runs. Until then it costs about 28 tokens; SKILL.md has 478 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from sammcj/agentic-coding at commit 2f25ced, republished under its Apache-2.0 licence (© sammcj). 478 words, ~792 tokens.
Download SKILL.mdSave it as
.claude/skills/self-review/SKILL.md (or your agent's skills folder).- name
- self-review
- description
- Use to critically self-review your changes, or when you want to delegate the review to a sub-agent.
- argument-hint
- [optional focus or extra context]
Critically review your recent changes and fix any issues you find. Choose one of the two paths below, based on the size of the change. When in doubt, delegate - the cost is low and the unbiased read is the point.
Option A: Review it yourself (small or simple changes)
For a single file, or one focused fix or feature: Re-read what you changed with a sceptical eye - correctness, completeness, regressions, over-engineering, unwarranted verbosity.
Then fix what you find directly.
Option B: Delegate to the reviewer (larger changes)
For changes spanning multiple files, features, or fixes: Delegate to the critical-reviewer subagent(s) for a fresh, unbiased read, then act on what they report.
- A fresh reviewer catches what you've talked yourself into, and keeps the review reasoning out of your context.
- The reviewer is read-only and returns prioritised findings (each with a severity and a
file:linelocation); you triage by severity and apply the fixes.
When you delegate:
- If the change is large or complex. Consider calling the sub-agent with the fable model (if it's available) as it's the most powerful AI model.
- Provide a high signal brief. The agent operates outside of this conversation's context. Give it: the list of changed files (names only, e.g.
git diff --name-only), the task you were originally asked to do and what was in / out of scope, and anything intentional that looks wrong but isn't. - Parallelise only on independent slices. Spawn one reviewer per group of changes that don't interact (by subsystem, layer, or requirement), and give each an explicit boundary - the files or area it owns - so they don't overlap. When slices share an interface or contract, brief at least one reviewer on both sides, or use a single reviewer - a fresh reviewer that sees only one side can't catch the interaction. Don't split for its own sake.
- Stay fresh by default. A fresh reviewer gives the unbiased read that makes self-review worth doing. Fork only if the review genuinely needs this conversation's nuance; never fork it for the adversarial read, since a fork inherits this agent's bias and defeats the point.
- Write the brief in terse notes. Keywords and bullets, not full prose; the reviewer is a capable model, not an audience.
- For very complex changes pick the best model. If the work to review is very complex, use the most capable model available (e.g.
fable), for normal reviews use the default model (opus).
Show full SKILL.md (77 more words)Show less
After each reviewer agent has finished and returned it's findings (unless there is a good reason to wait for all findings, or instructed otherwise):
- Action the (valid) findings.
- Fix what's real. Apply the fixes for genuine findings, then verify (build, tests, lint). Push back on findings that are wrong rather than changing correct code to satisfy them.
- If you make large amounts of changes, loop back and run another review cycle (maximum loops: 3).
$ARGUMENTS
© sammcj, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in Skills/self-review of sammcj/agentic-coding.
Open the folder on GitHubat commit 2f25ced
Compare with similar skills
Self Review next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Self Review this skillsammcj/agentic-coding | 162 | — | ~792 | Automated safety check: Pass | Apache-2.0 | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 38k | 7 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Subagent Driven DevelopmentAsvarox/allkaraoke | 261 | 37 repos | ~1.2k | Automated safety check: Pass | None | |
| Dispatching Parallel Agentsultralisp/ultralisp | 258 | 40 repos | ~1.5k | Automated safety check: Pass | None | |
| Paseo Advisor Second Opiniongetpaseo/paseo | 20k | 1 repos | ~756 | Automated safety check: Pass | Custom licence | |
| Task Observerrebelytics/one-skill-to-rule-them-all | 3.2k | 1 repos | ~11k | Automated safety check: Pass | CC-BY-4.0 |
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- Official
Subagent Driven Development
Asvarox/allkaraoke
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Dispatching Parallel Agents
ultralisp/ultralisp
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Paseo Advisor Second Opinion
getpaseo/paseo
Launches one separate agent through Paseo to give a second opinion on the current task, with a self-contained briefing and no permission to edit files.
Task Observer
rebelytics/one-skill-to-rule-them-all
Monitors task execution for skill improvement opportunities.
O2 Review Loop
openobserve/openobserve
Splits a change into planner, coder and independent reviewer roles: you confirm a spec, a subagent implements it, and a separate reviewer checks each round's local WIP commit.
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Categories
Questions about Self Review
What does Self Review do?
A skill your agent uses to critically self-review your changes, or when you want to delegate the review to a sub-agent. Self Review is an agent skill from sammcj/agentic-coding. Use to critically self-review your changes, or when you want to delegate the review to a sub-agent.
When should I use Self Review?
Self Review fits situations like: critically self-review your changes; you want to delegate the review to a sub-agent.
How do I install Self Review in Claude Code?
Run `npx skills add sammcj/agentic-coding --skill self-review -a claude-code`. Or copy the skill folder (Skills/self-review in sammcj/agentic-coding) into .claude/skills/self-review in your project. Claude Code loads it when a task matches its description.
How do I install Self Review in Codex?
Run `npx skills add sammcj/agentic-coding --skill self-review -a codex`. Or copy the skill folder (Skills/self-review in sammcj/agentic-coding) into .agents/skills/self-review in your project. Codex loads it when a task matches its description.
Can I use Self Review in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add sammcj/agentic-coding --skill self-review -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/self-review, .gemini/skills/self-review, .github/skills/self-review and .opencode/skills/self-review in your project.
What does Self Review need to run?
Going by SKILL.md and its folder, Self Review needs the command-line tools its instructions call (git).
Does Self Review access the network?
SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Self Review safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Self Review use?
Self Review is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Self Review use?
About 792 tokens (SKILL.md is roughly 3.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Self Review?
Skills that share tags, products or a category with Self Review: Claude Code Agent Development (anthropics/claude-plugins-official, 38k stars), Subagent Driven Development (Asvarox/allkaraoke, 261 stars), Dispatching Parallel Agents (ultralisp/ultralisp, 258 stars) and Paseo Advisor Second Opinion (getpaseo/paseo, 20k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Self Review?
sammcj (a GitHub user) maintains it in sammcj/agentic-coding, which has 162 GitHub stars. The repository holds 64 skills in this directory. The repository was last updated on October 9, 2026.
Source: sammcj/agentic-coding on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.