Code Improver
trailofbits/skills
Runs an autonomous review-and-fix improvement loop over any code target — a skill, plugin, module, or directory — using a reviewer the user names: any installed skill or agent.
This skill should be used when the user has a vague or cross-domain request and asks "which skill should I use", "is there a skill for this", "find the right skill", or "route this to the best…
MITAuto-check passed
Install Skill Router
$ npx skills add majiayu000/claude-skill-registry --skill skill-router -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install majiayu000/claude-skill-registry skill-router --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/majiayu000/claude-skill-registry.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/bash/skill-router .claude/skills/skill-router && 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 "skill-router" agent skill from https://github.com/majiayu000/claude-skill-registry/tree/main/skills/bash/skill-router into .claude/skills/skill-router/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-router", 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/majiayu000/claude-skill-registry/tree/main/skills/bash/skill-routerType 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 majiayu000/claude-skill-registry --skill skill-router -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install majiayu000/claude-skill-registry skill-router --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/majiayu000/claude-skill-registry.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/bash/skill-router .agents/skills/skill-router && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "skill-router" agent skill from https://github.com/majiayu000/claude-skill-registry/tree/main/skills/bash/skill-router into .agents/skills/skill-router/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-router", 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 majiayu000/claude-skill-registry --skill skill-router -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install majiayu000/claude-skill-registry skill-router --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/majiayu000/claude-skill-registry.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/bash/skill-router .cursor/skills/skill-router && 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 "skill-router" agent skill from https://github.com/majiayu000/claude-skill-registry/tree/main/skills/bash/skill-router into .cursor/skills/skill-router/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-router", 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/majiayu000/claude-skill-registry.git --path skills/bash/skill-router--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 majiayu000/claude-skill-registry --skill skill-router -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install majiayu000/claude-skill-registry skill-router --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/majiayu000/claude-skill-registry.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/bash/skill-router .gemini/skills/skill-router && 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 "skill-router" agent skill from https://github.com/majiayu000/claude-skill-registry/tree/main/skills/bash/skill-router into .gemini/skills/skill-router/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-router", 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 majiayu000/claude-skill-registry skill-routerInstalls 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 majiayu000/claude-skill-registry --skill skill-router -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/majiayu000/claude-skill-registry.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/bash/skill-router .github/skills/skill-router && 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 "skill-router" agent skill from https://github.com/majiayu000/claude-skill-registry/tree/main/skills/bash/skill-router into .github/skills/skill-router/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-router", 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 majiayu000/claude-skill-registry --skill skill-router -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install majiayu000/claude-skill-registry skill-router --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/majiayu000/claude-skill-registry.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/bash/skill-router .opencode/skills/skill-router && 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 "skill-router" agent skill from https://github.com/majiayu000/claude-skill-registry/tree/main/skills/bash/skill-router into .opencode/skills/skill-router/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "skill-router", 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
skill-router- GitHub stars
- 666
- Used in
- 1 other repo
- Token cost
- ~1.2k tokens
- SKILL.md length
- 548 words
- Files
- 2
- Skills in repo
- 1,273
- Repo updated
- First seen
- Licence
- MIT
At a glance
This skill should be used when the user has a vague or cross-domain request and asks "which skill should I use", "is there a skill for this", "find the right skill", or "route this to the best…
- Works in 4 steps: Run route_skill.py "" against the… → Review the ranked candidates and their… → Pick the top fit (or present the top 2-3… → …
- Cross-domain request and asks which skill should I use
- SKILL.md covers Overview, Use when, Clarify First and Quick Start, plus 4 more sections
- Calls python
What it does
Skill Router is an agent skill from majiayu000/claude-skill-registry. This skill should be used when the user has a vague or cross-domain request and asks "which skill should I use", "is there a skill for this", "find the right skill", or "route this to the best skill" — it matches an intent against the whole skills library and recommends the best-fit skill(s).
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `metadata.json`).
It works with Bash. The repository describes itself as: Searchable Claude Code skills catalog with source-linked guides and generated registry artifacts. The licence is MIT.
When your agent uses it
- Cross-domain request and asks which skill should I use
- Is there a skill for this
- Find the right skill
- Route this to the best skill — it matches an intent against the whole skills library and recommends the best-fit skill(s)
Example prompts
- “which skill should I use”
- “is there a skill for this”
- “find the right skill”
- “/skill-router”
Requirements
- Python 3
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Run route_skill.py "" against the generated catalog (cli/skills.json).
- Review the ranked candidates and their match reasons.
- Pick the top fit (or present the top 2-3 if genuinely ambiguous) and activate that skill — do not do the work in the router.
- If nothing scores well, say so plainly and suggest the closest domain rather than forcing a weak match.
What it can do on your machine
Read from SKILL.md and the folder at commit 2d14a69. 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:
python
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
Skill Router loads about 1.2k tokens when it runs. Until then it costs about 77 tokens; SKILL.md has 548 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 majiayu000/claude-skill-registry at commit 2d14a69, republished under its MIT licence (© majiayu000). 548 words, ~1,167 tokens.
Download SKILL.mdSave it as
.claude/skills/skill-router/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- skill-router
- description
- This skill should be used when the user has a vague or cross-domain request and asks "which skill should I use", "is there a skill for this", "find the right skill", or "route this to the best skill" — it matches an intent against the whole skills library and recommends the best-fit skill(s).
- license
- MIT + Commons Clause
- metadata.version
- 1.0.0
- metadata.author
- borghei
- metadata.category
- workflow
- metadata.domain
- orchestration
- metadata.updated
- 2026-06-22
- metadata.python-tools
- route_skill.py
- metadata.tags
- router, discovery, orchestration, navigation, intent-matching
Skill Router
Overview
This library has hundreds of skills across sixteen domains. A user rarely knows the exact skill name — they know their intent ("I need to figure out what to build next quarter," "I have to respond to a data breach"). The router closes that gap: it matches a free-text request against every skill's description and tags, ranks the candidates, and recommends the best fit — so the right skill activates on the first try instead of the user grepping folders or guessing.
It is the user-invoked orchestrator in the two-tier model: it never does the work itself, it routes to the skill (the discipline) that does. Treat its output as a recommendation, then activate the chosen skill.
Use when
- Vague intent — the user describes a goal but not which skill ("help me plan a launch").
- Cross-domain ambiguity — the request could plausibly live in several domains (is "pricing" PM, finance, or business-growth?).
- Discovery — the user asks whether a skill exists for X before assuming there isn't one.
- Disambiguation — several similarly named skills exist (e.g. multiple PRD or CRO skills) and you need the closest match.
Clarify First
Before routing, confirm these inputs. If any is unknown or vague, ASK — do not assume:
- The actual goal — the outcome the user wants, in their words (the router matches intent, so a vague goal yields vague matches)
- Artifact vs advice — do they want to produce something or decide/understand something (separates generative skills from advisory ones)
Stop rule: if the request is already specific, skip the questions and route directly.
Quick Start
# Recommend the best-fit skills for an intent
python scripts/route_skill.py "plan a go-to-market for a new B2B feature"
# Narrow to a domain, or widen the result set
python scripts/route_skill.py "respond to a data breach" --top 5
python scripts/route_skill.py "forecast revenue" --domain finance --format json- Run
route_skill.py "<the user's goal>"against the generated catalog (cli/skills.json). - Review the ranked candidates and their match reasons.
- Pick the top fit (or present the top 2-3 if genuinely ambiguous) and activate that skill — do not do the work in the router.
- If nothing scores well, say so plainly and suggest the closest domain rather than forcing a weak match.
Show full SKILL.md (226 more words)Show less
How matching works
The script scores each skill by term overlap between the query and the skill's
name, tags, domain, and description, weighting exact name/tag hits highest.
It reads the catalog from cli/skills.json (regenerated by scripts/build_manifest.py),
so it always reflects the current library without hardcoding any skill list.
Anti-patterns
- Doing the work instead of routing. The router recommends; the recommended skill executes. Don't blur the two.
- Forcing a match. If the top score is weak, say "no strong fit" — a confidently wrong route is worse than an honest miss.
- Ignoring the artifact-vs-advice split. Routing a "produce a PRD" intent to an advisory persona (or vice-versa) wastes the user's time.
- Hardcoding skill names. Always read the live catalog; the library changes.
Scope & Limitations
In Scope: Matching a free-text intent against the skills catalog and recommending the best-fit skill(s); disambiguating similar skills; confirming whether a skill exists for a goal.
Out of Scope: Executing the matched skill's workflow (that's the target skill's job); multi-skill workflow orchestration across a sequence (see standards/ orchestration protocol and agents/personas/); installing or extracting skills.
Dependency note: the router reads the repo-level catalog cli/skills.json. It is a navigation aid for use within the library, not a standalone single-skill download — if the catalog is absent, point the script at it with --catalog <path> or regenerate it with python scripts/build_manifest.py.
References
scripts/route_skill.py— intent-to-skill scorer overcli/skills.json.
© majiayu000, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file in skills/bash/skill-router of majiayu000/claude-skill-registry.
- SKILL.md
- metadata.json
Open the folder on GitHubat commit 2d14a69
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 majiayu000/claude-skill-registry, which our catalogue first saw on October 8, 2026.
Compare with similar skills
Skill Router 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 |
|---|---|---|---|---|---|---|
| Skill Router this skillmajiayu000/claude-skill-registry | 666 | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Code Improvertrailofbits/skills | 7.4k | — | ~1.8k | Automated safety check: Notes | CC-BY-SA-4.0 | |
| Skill Improvertrailofbits/skills | 7.4k | — | ~2.1k | Automated safety check: Notes | CC-BY-SA-4.0 | |
| Skill Stocktakeaffaan-m/ECC | 275k | — | ~1.4k | Automated safety check: Pass | MIT | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 11 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Plugin Settings Patternanthropics/claude-plugins-official | 38k | 7 repos | ~3k | Automated safety check: Pass | Apache-2.0 |
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Related
Works with
Questions about Skill Router
What does Skill Router do?
This skill should be used when the user has a vague or cross-domain request and asks "which skill should I use", "is there a skill for this", "find the right skill", or "route this to the best…. Skill Router is an agent skill from majiayu000/claude-skill-registry. This skill should be used when the user has a vague or cross-domain request and asks "which skill should I use", "is there a skill for this", "find the right skill", or "route this to the best skill" — it matches an intent against the whole skills library and recommends the best-fit skill(s).
When should I use Skill Router?
Skill Router fits situations like: cross-domain request and asks which skill should I use; is there a skill for this; find the right skill; route this to the best skill — it matches an intent against the whole skills library and recommends the best-fit skill(s).
How do I install Skill Router in Claude Code?
Run `npx skills add majiayu000/claude-skill-registry --skill skill-router -a claude-code`. Or copy the skill folder (skills/bash/skill-router in majiayu000/claude-skill-registry) into .claude/skills/skill-router in your project. Claude Code loads it when a task matches its description.
How do I install Skill Router in Codex?
Run `npx skills add majiayu000/claude-skill-registry --skill skill-router -a codex`. Or copy the skill folder (skills/bash/skill-router in majiayu000/claude-skill-registry) into .agents/skills/skill-router in your project. Codex loads it when a task matches its description.
Can I use Skill Router 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 majiayu000/claude-skill-registry --skill skill-router -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/skill-router, .gemini/skills/skill-router, .github/skills/skill-router and .opencode/skills/skill-router in your project.
What does Skill Router need to run?
Going by SKILL.md and its folder, Skill Router needs the command-line tools its instructions call (python). Our summary lists: Python 3.
Does Skill Router 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 Skill Router 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 Skill Router use?
Skill Router is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Skill Router use?
About 1.2k tokens (SKILL.md is roughly 4.7k 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 Skill Router?
Skills that share tags, products or a category with Skill Router: Code Improver (trailofbits/skills, 7.4k stars), Skill Improver (trailofbits/skills, 7.4k stars), Skill Stocktake (affaan-m/ECC, 275k stars) and Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Skill Router?
majiayu000 (a GitHub user) maintains it in majiayu000/claude-skill-registry, which has 666 GitHub stars. The repository holds 1,273 skills in this directory. The repository was last updated on October 7, 2026.
Source: majiayu000/claude-skill-registry on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.