Code Refactor Master
yennanliu/CS_basics
Code refactoring expert for improving code quality, readability, maintainability, and performance.
Detects and safely removes unused code (imports, functions, classes) across multiple languages.
Install Dead Code Removal
$ npx skills add aiskillstore/marketplace --skill dead-code-removal -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace dead-code-removal --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/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/89jobrien/dead-code-removal .claude/skills/dead-code-removal && 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 "dead-code-removal" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/89jobrien/dead-code-removal into .claude/skills/dead-code-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dead-code-removal", 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/aiskillstore/marketplace/tree/main/skills/89jobrien/dead-code-removalType 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 aiskillstore/marketplace --skill dead-code-removal -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace dead-code-removal --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/89jobrien/dead-code-removal .agents/skills/dead-code-removal && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "dead-code-removal" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/89jobrien/dead-code-removal into .agents/skills/dead-code-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dead-code-removal", 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 aiskillstore/marketplace --skill dead-code-removal -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace dead-code-removal --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/89jobrien/dead-code-removal .cursor/skills/dead-code-removal && 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 "dead-code-removal" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/89jobrien/dead-code-removal into .cursor/skills/dead-code-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dead-code-removal", 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/aiskillstore/marketplace.git --path skills/89jobrien/dead-code-removal--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 aiskillstore/marketplace --skill dead-code-removal -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace dead-code-removal --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/89jobrien/dead-code-removal .gemini/skills/dead-code-removal && 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 "dead-code-removal" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/89jobrien/dead-code-removal into .gemini/skills/dead-code-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dead-code-removal", 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 aiskillstore/marketplace dead-code-removalInstalls 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 aiskillstore/marketplace --skill dead-code-removal -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/89jobrien/dead-code-removal .github/skills/dead-code-removal && 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 "dead-code-removal" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/89jobrien/dead-code-removal into .github/skills/dead-code-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dead-code-removal", 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 aiskillstore/marketplace --skill dead-code-removal -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace dead-code-removal --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/89jobrien/dead-code-removal .opencode/skills/dead-code-removal && 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 "dead-code-removal" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/89jobrien/dead-code-removal into .opencode/skills/dead-code-removal/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "dead-code-removal", 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
dead-code-removal- GitHub stars
- 430
- Used in
- 1 other repo
- Token cost
- ~1.9k tokens
- SKILL.md length
- 556 words
- Files
- 3 (incl. scripts)
- Skills in repo
- 1,085
- Repo updated
- First seen
- Licence
- None found
At a glance
Detects and safely removes unused code (imports, functions, classes) across multiple languages.
- Works in 5 steps: Language Detection → Build Dependency Graph → Detect Unused Elements → …
- Tasks that involve Refactoring
- SKILL.md covers When to Use This Skill, What This Skill Does, Helper Scripts and How to Use, plus 4 more sections
- Runs Python scripts from its folder; calls python, rsync and npx
What it does
Dead Code Removal is an agent skill from aiskillstore/marketplace. Detects and safely removes unused code (imports, functions, classes) across multiple languages. Use after refactoring, when removing features, or before production deployment. Includes safety checks and validation.
Its SKILL.md is about 1.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 3 other files, including scripts (for example `scripts/find-unused-imports.py` and `skill-report.json`).
It sits in Development, covering Refactoring. It works with Java and Python. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- Tasks that involve Refactoring
Example prompts
- “Use the dead-code-removal skill to detect and safely removes unused code (imports, functions, classes) across multiple languages”
- “/dead-code-removal”
Requirements
- Python 3
- Node.js
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Language Detection
- Build Dependency Graph
- Detect Unused Elements
- Safety Checks
- Safe Removal Process
What it can do on your machine
Read from SKILL.md and the folder at commit 4ac52da. 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
Ships 1 file in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
pythonrsyncnpxnpmjavacmvn
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use rsync, npx and npm, 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
Dead Code Removal loads about 1.9k tokens when it runs. Until then it costs about 58 tokens; SKILL.md has 556 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); the scripts in this folder are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 556 words (~1,902 tokens).
“This skill safely identifies and removes unused code across multiple programming languages. It includes comprehensive safety checks to prevent removing code that's actually needed.”
- name
- dead-code-removal
- author
- Joseph OBrien
- status
- unpublished
- updated
- 2025-12-23
- version
- 1.0.1
- tag
- skill
- type
- skill
Files
SKILL.md and 2 other files (scripts) in skills/89jobrien/dead-code-removal of aiskillstore/marketplace.
- SKILL.md
- scripts/find-unused-imports.py
- skill-report.json
Open the folder on GitHubat commit 4ac52da
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 aiskillstore/marketplace, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Dead Code Removal 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 |
|---|---|---|---|---|---|---|
| Dead Code Removal this skillaiskillstore/marketplace | 430 | 1 repos | ~1.9k | Automated safety check: Pass | None | |
| Code Refactor Masteryennanliu/CS_basics | 142 | — | ~3.3k | Automated safety check: Pass | None | |
| Code Revieweralirezarezvani/claude-skills | 28k | 1 repos | ~1.6k | Automated safety check: Pass | MIT | |
| Algorithmic Complexity Reviewpproenca/dot-skills | 214 | — | ~3k | Automated safety check: Pass | MIT | |
| Crap Analyzerswingerman/engineer | 154 | — | ~1.2k | Automated safety check: Pass | MIT | |
| Dignified Python Standardsdocling-project/docling | 68k | — | ~1.5k | Automated safety check: Pass | Apache-2.0 |
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Related
Categories
Questions about Dead Code Removal
What does Dead Code Removal do?
Detects and safely removes unused code (imports, functions, classes) across multiple languages. Dead Code Removal is an agent skill from aiskillstore/marketplace. Detects and safely removes unused code (imports, functions, classes) across multiple languages.
When should I use Dead Code Removal?
Dead Code Removal fits situations like: tasks that involve Refactoring.
How do I install Dead Code Removal in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill dead-code-removal -a claude-code`. Or copy the skill folder (skills/89jobrien/dead-code-removal in aiskillstore/marketplace) into .claude/skills/dead-code-removal in your project. Claude Code loads it when a task matches its description.
How do I install Dead Code Removal in Codex?
Run `npx skills add aiskillstore/marketplace --skill dead-code-removal -a codex`. Or copy the skill folder (skills/89jobrien/dead-code-removal in aiskillstore/marketplace) into .agents/skills/dead-code-removal in your project. Codex loads it when a task matches its description.
Can I use Dead Code Removal 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 aiskillstore/marketplace --skill dead-code-removal -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/dead-code-removal, .gemini/skills/dead-code-removal, .github/skills/dead-code-removal and .opencode/skills/dead-code-removal in your project.
What does Dead Code Removal need to run?
Going by SKILL.md and its folder, Dead Code Removal needs Python for the scripts in its folder and the command-line tools its instructions call (python, rsync, npx, npm, javac and mvn). Our summary lists: Python 3; Node.js.
Does Dead Code Removal access the network?
SKILL.md contains no URLs. Its commands use npx and npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Dead Code Removal 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. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Dead Code Removal use?
No licence was found for Dead Code Removal or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Dead Code Removal use?
About 1.9k tokens (SKILL.md is roughly 7.6k 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 Dead Code Removal?
Skills that share tags, products or a category with Dead Code Removal: Code Refactor Master (yennanliu/CS_basics, 142 stars), Code Reviewer (alirezarezvani/claude-skills, 28k stars), Algorithmic Complexity Review (pproenca/dot-skills, 214 stars) and Crap Analyzer (swingerman/engineer, 154 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Dead Code Removal?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,085 skills in this directory. The repository was last updated on October 7, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.