Review And Simplify Changes
Dimillian/Skills
Review a git diff or explicit file scope for reuse, code quality, efficiency, clarity, and standards issues, then optionally apply safe Codex-driven fixes.
Review a change set for reuse, simplification, efficiency, and altitude problems, then apply the fixes while preserving exact behavior.
Install Code Simplifier
$ npx skills add TwiTech-LAB/devchain --skill code-simplifier -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install TwiTech-LAB/devchain code-simplifier --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/TwiTech-LAB/devchain.git skills-src && mkdir -p .claude/skills && cp -r skills-src/apps/local-app/skills/code-simplifier .claude/skills/code-simplifier && 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 "code-simplifier" agent skill from https://github.com/TwiTech-LAB/devchain/tree/main/apps/local-app/skills/code-simplifier into .claude/skills/code-simplifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-simplifier", 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/TwiTech-LAB/devchain/tree/main/apps/local-app/skills/code-simplifierType 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 TwiTech-LAB/devchain --skill code-simplifier -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install TwiTech-LAB/devchain code-simplifier --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TwiTech-LAB/devchain.git skills-src && mkdir -p .agents/skills && cp -r skills-src/apps/local-app/skills/code-simplifier .agents/skills/code-simplifier && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "code-simplifier" agent skill from https://github.com/TwiTech-LAB/devchain/tree/main/apps/local-app/skills/code-simplifier into .agents/skills/code-simplifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-simplifier", 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 TwiTech-LAB/devchain --skill code-simplifier -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install TwiTech-LAB/devchain code-simplifier --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TwiTech-LAB/devchain.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/apps/local-app/skills/code-simplifier .cursor/skills/code-simplifier && 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 "code-simplifier" agent skill from https://github.com/TwiTech-LAB/devchain/tree/main/apps/local-app/skills/code-simplifier into .cursor/skills/code-simplifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-simplifier", 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/TwiTech-LAB/devchain.git --path apps/local-app/skills/code-simplifier--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 TwiTech-LAB/devchain --skill code-simplifier -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install TwiTech-LAB/devchain code-simplifier --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TwiTech-LAB/devchain.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/apps/local-app/skills/code-simplifier .gemini/skills/code-simplifier && 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 "code-simplifier" agent skill from https://github.com/TwiTech-LAB/devchain/tree/main/apps/local-app/skills/code-simplifier into .gemini/skills/code-simplifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-simplifier", 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 TwiTech-LAB/devchain code-simplifierInstalls 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 TwiTech-LAB/devchain --skill code-simplifier -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/TwiTech-LAB/devchain.git skills-src && mkdir -p .github/skills && cp -r skills-src/apps/local-app/skills/code-simplifier .github/skills/code-simplifier && 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 "code-simplifier" agent skill from https://github.com/TwiTech-LAB/devchain/tree/main/apps/local-app/skills/code-simplifier into .github/skills/code-simplifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-simplifier", 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 TwiTech-LAB/devchain --skill code-simplifier -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install TwiTech-LAB/devchain code-simplifier --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/TwiTech-LAB/devchain.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/apps/local-app/skills/code-simplifier .opencode/skills/code-simplifier && 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 "code-simplifier" agent skill from https://github.com/TwiTech-LAB/devchain/tree/main/apps/local-app/skills/code-simplifier into .opencode/skills/code-simplifier/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "code-simplifier", 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
code-simplifier- GitHub stars
- 101
- Token cost
- ~2k tokens
- SKILL.md length
- 1,121 words
- Files
- 1
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Review a change set for reuse, simplification, efficiency, and altitude problems, then apply the fixes while preserving exact behavior.
- Works in 7 steps: Scope the change set → Load the project's standards → Review from four angles → …
- Tasks that involve Code simplification
- SKILL.md covers Phase 0 — Scope the change set, Phase 1 — Load the project's…, Phase 2 — Review from four… and Phase 3 — Reconcile, plus 4 more sections
- Calls git
What it does
Code Simplifier is an agent skill from TwiTech-LAB/devchain. Review a change set for reuse, simplification, efficiency, and altitude problems, then apply the fixes while preserving exact behavior. Scopes to the diff, applies the target project's coding standards, runs four independent review angles (in parallel when the runtime can spawn sub-agents, otherwise as separate sequential passes), verifies with the project's own commands, and reports what was fixed and what was skipped. Use at phase close, before a commit, or when asked to simplify, clean up, or polish code…
Its SKILL.md is about 2k 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 Development, covering Code simplification, Subagents and Code quality. It works with Git. The repository describes itself as: Run a team of AI coding agents. On your machine. Local-first orchestration for Claude Code, Codex, OpenCode, Antigravity, and Copilot.
When your agent uses it
- Tasks that involve Code simplification
- Tasks that involve Subagents
- Tasks that involve Code quality
Example prompts
- “/code-simplifier”
Workflow steps
7 steps, taken from the step headings in SKILL.md.
- Scope the change set
- Load the project's standards
- Review from four angles
- Reconcile
- Apply
- Verify
- Report
What it can do on your machine
Read from SKILL.md and the folder at commit 172b47c. 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
Code Simplifier loads about 2k tokens when it runs. Until then it costs about 159 tokens; SKILL.md has 1,121 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 1,121 words (~2,028 tokens).
“Improve the quality of a change set without changing what it does. The goal is code that is easier to understand, reuse, debug, and extend — not code with fewer lines. This skill does not hunt for correctness bugs; a…”
- name
- code-simplifier
- displayName
- Code Simplifier
- version
- 0.2.0
- license
- Adapted from the @claude-plugins-official code-simplifier agent prompt and the Claude Code /simplify command
Files
Just SKILL.md in apps/local-app/skills/code-simplifier of TwiTech-LAB/devchain.
Open the folder on GitHubat commit 172b47c
Compare with similar skills
Code Simplifier 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 |
|---|---|---|---|---|---|---|
| Code Simplifier this skillTwiTech-LAB/devchain | 101 | — | ~2k | Automated safety check: Pass | Custom licence | |
| Review And Simplify ChangesDimillian/Skills | 4k | — | ~2k | Automated safety check: Pass | MIT | |
| Code Revieweralirezarezvani/claude-code-tresor | 777 | — | ~1.8k | Automated safety check: Pass | MIT | |
| Simplify Recent ChangesQwenLM/qwen-code | 28k | — | ~1.3k | Automated safety check: Pass | Apache-2.0 | |
| Simplify Codesickn33/agentic-awesome-skills | 47k | 2 repos | ~1.8k | Automated safety check: Pass | MIT | |
| Review And Simplify Changessickn33/agentic-awesome-skills | 47k | 1 repos | ~2.2k | Automated safety check: Pass | MIT |
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Simplify Recent Changes
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Reviews your uncommitted diff with three parallel passes for reuse, quality and efficiency, then applies the straightforward cleanups before a pull request.
Simplify Code
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Review a diff for clarity and safe simplifications, then optionally apply low-risk fixes.
Review And Simplify Changes
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Review a git diff or explicit file scope for reuse, code quality, efficiency, clarity, and standards issues, then optionally apply safe Codex-driven fixes.
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Simplifies and refines code for clarity, consistency, and maintainability while preserving all functionality.
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Related
Works with
Categories
Questions about Code Simplifier
What does Code Simplifier do?
Review a change set for reuse, simplification, efficiency, and altitude problems, then apply the fixes while preserving exact behavior. Code Simplifier is an agent skill from TwiTech-LAB/devchain. Review a change set for reuse, simplification, efficiency, and altitude problems, then apply the fixes while preserving exact behavior.
When should I use Code Simplifier?
Code Simplifier fits situations like: tasks that involve Code simplification; tasks that involve Subagents; tasks that involve Code quality.
How do I install Code Simplifier in Claude Code?
Run `npx skills add TwiTech-LAB/devchain --skill code-simplifier -a claude-code`. Or copy the skill folder (apps/local-app/skills/code-simplifier in TwiTech-LAB/devchain) into .claude/skills/code-simplifier in your project. Claude Code loads it when a task matches its description.
How do I install Code Simplifier in Codex?
Run `npx skills add TwiTech-LAB/devchain --skill code-simplifier -a codex`. Or copy the skill folder (apps/local-app/skills/code-simplifier in TwiTech-LAB/devchain) into .agents/skills/code-simplifier in your project. Codex loads it when a task matches its description.
Can I use Code Simplifier 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 TwiTech-LAB/devchain --skill code-simplifier -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/code-simplifier, .gemini/skills/code-simplifier, .github/skills/code-simplifier and .opencode/skills/code-simplifier in your project.
What does Code Simplifier need to run?
Going by SKILL.md and its folder, Code Simplifier needs the command-line tools its instructions call (git).
Does Code Simplifier 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 Code Simplifier 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 Code Simplifier use?
Code Simplifier 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 Code Simplifier use?
About 2k tokens (SKILL.md is roughly 8.1k 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 Code Simplifier?
Skills that share tags, products or a category with Code Simplifier: Review And Simplify Changes (Dimillian/Skills, 4k stars), Code Reviewer (alirezarezvani/claude-code-tresor, 777 stars), Simplify Recent Changes (QwenLM/qwen-code, 28k stars) and Simplify Code (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Code Simplifier?
TwiTech-LAB (a GitHub organization) maintains it in TwiTech-LAB/devchain, which has 101 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on October 7, 2026.
Source: TwiTech-LAB/devchain on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.