Code Review Skill
awesome-skills/code-review-skill
Provides comprehensive code review guidance for React 19, Vue 3, Angular 17+, Svelte 5, Rust, TypeScript, Java, Java 8, PHP, Ruby, Rails, Python, Django, FastAPI, Go, C/.NET, Kotlin, Swift, Dart…
A code-change rule for the cmux terminal app: implement a behavior once and verify every entrypoint that exposes it, instead of patching one surface at a time.
Install cmux Shared Behavior Rules
$ npx skills add manaflow-ai/cmux --skill cmux-shared-behavior -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install manaflow-ai/cmux cmux-shared-behavior --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/manaflow-ai/cmux.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/cmux-shared-behavior .claude/skills/cmux-shared-behavior && 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 "cmux-shared-behavior" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-shared-behavior into .claude/skills/cmux-shared-behavior/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-shared-behavior", 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/manaflow-ai/cmux/tree/main/skills/cmux-shared-behaviorType 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 manaflow-ai/cmux --skill cmux-shared-behavior -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install manaflow-ai/cmux cmux-shared-behavior --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/cmux-shared-behavior .agents/skills/cmux-shared-behavior && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "cmux-shared-behavior" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-shared-behavior into .agents/skills/cmux-shared-behavior/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-shared-behavior", 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 manaflow-ai/cmux --skill cmux-shared-behavior -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install manaflow-ai/cmux cmux-shared-behavior --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/cmux-shared-behavior .cursor/skills/cmux-shared-behavior && 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 "cmux-shared-behavior" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-shared-behavior into .cursor/skills/cmux-shared-behavior/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-shared-behavior", 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/manaflow-ai/cmux.git --path skills/cmux-shared-behavior--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 manaflow-ai/cmux --skill cmux-shared-behavior -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install manaflow-ai/cmux cmux-shared-behavior --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/cmux-shared-behavior .gemini/skills/cmux-shared-behavior && 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 "cmux-shared-behavior" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-shared-behavior into .gemini/skills/cmux-shared-behavior/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-shared-behavior", 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 manaflow-ai/cmux cmux-shared-behaviorInstalls 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 manaflow-ai/cmux --skill cmux-shared-behavior -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/cmux-shared-behavior .github/skills/cmux-shared-behavior && 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 "cmux-shared-behavior" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-shared-behavior into .github/skills/cmux-shared-behavior/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-shared-behavior", 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 manaflow-ai/cmux --skill cmux-shared-behavior -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install manaflow-ai/cmux cmux-shared-behavior --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/manaflow-ai/cmux.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/cmux-shared-behavior .opencode/skills/cmux-shared-behavior && 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 "cmux-shared-behavior" agent skill from https://github.com/manaflow-ai/cmux/tree/main/skills/cmux-shared-behavior into .opencode/skills/cmux-shared-behavior/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cmux-shared-behavior", 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
cmux-shared-behavior- GitHub stars
- 28k
- Used in
- 1 other repo
- Token cost
- ~274 tokens
- SKILL.md length
- 117 words
- Files
- 2
- Skills in repo
- 22
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
A code-change rule for the cmux terminal app: implement a behavior once and verify every entrypoint that exposes it, instead of patching one surface at a time.
- Changing a behavior that is exposed through several entrypoints at once
- SKILL.md covers Shared entrypoints, Optimistic updates and Missed-bug coverage
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Adding or fixing an optimistic UI update in cmux
What it does
This short rule applies whenever a behavior in cmux is reachable from more than one place, such as a keyboard shortcut, the command palette, a context menu, the CLI or a debug menu: implement one shared action or model path and check that every one of those entrypoints actually calls it, rather than fixing one surface and leaving duplicated logic in the others.
For optimistic UI updates it requires a single mutation path that tracks pending state with a request id or prior snapshot, reconciles from the authoritative result, and handles failure with an explicit rollback, instead of letting each entrypoint keep its own optimistic copy. When a user reports that tests missed a bug, it requires adding behavior-level coverage around the exact reproduction path before the fix can be called complete.
When your agent uses it
- Changing a behavior that is exposed through several entrypoints at once
- Adding or fixing an optimistic UI update in cmux
- Closing a coverage gap after tests missed a real bug
Example prompts
- “Add a new rename-tab action and make sure the shortcut, palette and CLI all route through it.”
- “Fix the optimistic update for closing a tab so a failed close rolls back correctly.”
- “Tests missed the bug where the context menu skipped the settings path; add coverage for it.”
What it can do on your machine
Read from SKILL.md and the folder at commit f6532b1. 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
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
cmux Shared Behavior Rules loads about 274 tokens when it runs. Until then it costs about 68 tokens; SKILL.md has 117 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 117 words (~274 tokens).
“When a behavior is exposed through multiple surfaces (keyboard shortcut, command palette, context menu, CLI/socket command, settings UI, debug menu), implement one shared action/model path and verify every entrypoint that should invoke it. Do not patch one surface and leave…”
- name
- cmux-shared-behavior
Files
SKILL.md and 1 other file in skills/cmux-shared-behavior of manaflow-ai/cmux.
- SKILL.md
- agents/openai.yaml
Open the folder on GitHubat commit f6532b1
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in manaflow-ai/cmux, which our catalogue first saw on October 7, 2026.
Compare with similar skills
cmux Shared Behavior Rules 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 |
|---|---|---|---|---|---|---|
| cmux Shared Behavior Rules this skillmanaflow-ai/cmux | 28k | 1 repos | ~274 | Automated safety check: Pass | Custom licence | |
| Code Review Skillawesome-skills/code-review-skill | 2.1k | — | ~2.8k | Automated safety check: Notes | MIT | |
| Code Review SkillRain-kl/OpenFlare | 288 | — | ~2.3k | Automated safety check: Notes | MIT | |
| Marmite Developmentrochacbruno/marmite | 883 | — | ~6.9k | Automated safety check: Pass | AGPL-3.0 | |
| Code Review Excellenceandrew-yangy/gru-ai | 155 | — | ~1.7k | Automated safety check: Notes | MIT | |
| A Philosophy of Software Designciembor/agent-rules-books | 2.9k | — | ~181 | Automated safety check: Pass | MIT |
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Related
Categories
Questions about cmux Shared Behavior Rules
What does cmux Shared Behavior Rules do?
A code-change rule for the cmux terminal app: implement a behavior once and verify every entrypoint that exposes it, instead of patching one surface at a time. This short rule applies whenever a behavior in cmux is reachable from more than one place, such as a keyboard shortcut, the command palette, a context menu, the CLI or a debug menu: implement one shared action or model path and check that every one of those entrypoints actually calls it, rather than fixing one surface and leaving duplicated logic in the others.
When should I use cmux Shared Behavior Rules?
cmux Shared Behavior Rules fits situations like: changing a behavior that is exposed through several entrypoints at once; adding or fixing an optimistic UI update in cmux; closing a coverage gap after tests missed a real bug.
How do I install cmux Shared Behavior Rules in Claude Code?
Run `npx skills add manaflow-ai/cmux --skill cmux-shared-behavior -a claude-code`. Or copy the skill folder (skills/cmux-shared-behavior in manaflow-ai/cmux) into .claude/skills/cmux-shared-behavior in your project. Claude Code loads it when a task matches its description.
How do I install cmux Shared Behavior Rules in Codex?
Run `npx skills add manaflow-ai/cmux --skill cmux-shared-behavior -a codex`. Or copy the skill folder (skills/cmux-shared-behavior in manaflow-ai/cmux) into .agents/skills/cmux-shared-behavior in your project. Codex loads it when a task matches its description.
Can I use cmux Shared Behavior Rules 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 manaflow-ai/cmux --skill cmux-shared-behavior -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cmux-shared-behavior, .gemini/skills/cmux-shared-behavior, .github/skills/cmux-shared-behavior and .opencode/skills/cmux-shared-behavior in your project.
What does cmux Shared Behavior Rules need to run?
SKILL.md names no scripts, command-line tools or credentials: cmux Shared Behavior Rules is instructions for the agent only.
Does cmux Shared Behavior Rules access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is cmux Shared Behavior Rules 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 cmux Shared Behavior Rules use?
cmux Shared Behavior Rules has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does cmux Shared Behavior Rules use?
About 274 tokens (SKILL.md is roughly 1.1k 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 cmux Shared Behavior Rules?
Skills that share tags, products or a category with cmux Shared Behavior Rules: Code Review Skill (awesome-skills/code-review-skill, 2.1k stars), Code Review Skill (Rain-kl/OpenFlare, 288 stars), Marmite Development (rochacbruno/marmite, 883 stars) and Code Review Excellence (andrew-yangy/gru-ai, 155 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains cmux Shared Behavior Rules?
manaflow-ai (a GitHub organization) maintains it in manaflow-ai/cmux, which has 28,044 GitHub stars. The repository holds 22 skills in this directory. The repository was last updated on October 9, 2026.
Source: manaflow-ai/cmux on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.