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Agent skill

Hotspots

by nwiizo in nwiizo/cargo-coupling

Rank a Rust project's refactoring candidates using cargo-coupling hotspot results.

MITAuto-check passedDevelopment

Install Hotspots

skills CLI
$ npx skills add nwiizo/cargo-coupling --skill hotspots -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install nwiizo/cargo-coupling hotspots --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/nwiizo/cargo-coupling.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/hotspots .claude/skills/hotspots && rm -rf skills-src

Use ~/.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/

Facts

Skill name
hotspots
GitHub stars
111
Token cost
~260 tokens
SKILL.md length
107 words
Files
1
Skills in repo
12
Repo updated
First seen
Licence
MIT

At a glance

Rank a Rust project's refactoring candidates using cargo-coupling hotspot results.

  • Tasks that involve Refactoring
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Hotspots is an agent skill from nwiizo/cargo-coupling. Rank a Rust project's refactoring candidates using cargo-coupling hotspot results.

Its SKILL.md is about 260 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 Refactoring. It works with Rust. The repository describes itself as: A coupling analysis tool for Rust projects - measuring the 'right distance' in your code. The licence is MIT.

When your agent uses it

  • Tasks that involve Refactoring

Example prompts

  • “/hotspots”

What it can do on your machine

Read from SKILL.md and the folder at commit aa0d18b. 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 (its code samples are bash).

    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

Hotspots loads about 260 tokens when it runs. Until then it costs about 23 tokens; SKILL.md has 107 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~23
When it runs · the whole SKILL.md, loaded when a task matches
~260

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 nwiizo/cargo-coupling at commit aa0d18b, republished under its MIT licence (© nwiizo). 107 words, ~260 tokens.

Download SKILL.mdSave it as .claude/skills/hotspots/SKILL.md (or your agent's skills folder).
name
hotspots
description
Rank a Rust project's refactoring candidates using cargo-coupling hotspot results.
argument-hint
[path] [--hotspots=N] [--verbose]

Refactoring Hotspots

Run the built-in ranking for the requested path (default ./src). Use the requested limit; the CLI default is five:

bash
rtk proxy cargo run -- coupling --hotspots ./src
rtk proxy cargo run -- coupling --hotspots=10 --verbose ./src

Use the returned scores and issue lists. If the scoring needs explanation, inspect hotspots.rs; do not maintain a separate formula or recompute scores from AI prose output.

Check the leading candidates in source and explain their likely change impact, business volatility, and a concrete next action. A high score or cycle is a signal to investigate, not automatic justification for an abstraction. Distinguish the CLI ranking from any adjusted recommendation and give the reason for it. Report scope and missing evidence; apply refactors when also requested.

© nwiizo, MIT. 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 .claude/skills/hotspots of nwiizo/cargo-coupling.

Open the folder on GitHubat commit aa0d18b

Compare with similar skills

Hotspots 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.

Hotspots compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Hotspots this skillnwiizo/cargo-coupling111—~260Automated safety check: PassMIT
Migrate Core Code to Submodulestinyhumansai/openhuman42k—~2.6kAutomated safety check: PassGPL-3.0
Rust Best Practicesfarm-fe/farm5.6k3 repos~1.1kAutomated safety check: PassMIT
RTK Rust Design Patternsrtk-ai/rtk83k—~1.9kAutomated safety check: PassApache-2.0
RTK Rust Code Simplifierrtk-ai/rtk83k—~1.1kAutomated safety check: PassApache-2.0
Rust Hygiene Audittsz-org/tsz577—~1.5kAutomated safety check: PassApache-2.0

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More from nwiizo/cargo-coupling

All 12 skills in this repo

  • Balanced Coupling

    nwiizo/cargo-coupling

    Interpret cargo-coupling findings using Khononov's strength, distance, and volatility model.

    111 GitHub stars~516 tokensUpdated today
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  • Cargo Coupling

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    Explain cargo-coupling CLI options and .coupling.toml configuration.

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  • Release

    nwiizo/cargo-coupling

    Prepare or publish a cargo-coupling version when the user requests a release.

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  • Analyze

    nwiizo/cargo-coupling

    Run cargo-coupling and interpret a Rust project's coupling report, history, or baseline diff.

    111 GitHub stars~354 tokensUpdated today
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  • Check Balance

    nwiizo/cargo-coupling

    Check a Rust project's coupling health summary or run a requested CI quality gate.

    111 GitHub stars~307 tokensUpdated today
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  • Mutants

    nwiizo/cargo-coupling

    Run cargo-mutants on selected Rust code and investigate gaps in tests revealed by surviving mutations.

    111 GitHub stars~414 tokensUpdated today
    Auto-check: notes

Works with

Categories

Questions about Hotspots

What does Hotspots do?

Rank a Rust project's refactoring candidates using cargo-coupling hotspot results. Hotspots is an agent skill from nwiizo/cargo-coupling. Rank a Rust project's refactoring candidates using cargo-coupling hotspot results.

When should I use Hotspots?

Hotspots fits situations like: tasks that involve Refactoring.

How do I install Hotspots in Claude Code?

Run `npx skills add nwiizo/cargo-coupling --skill hotspots -a claude-code`. Or copy the skill folder (.claude/skills/hotspots in nwiizo/cargo-coupling) into .claude/skills/hotspots in your project. Claude Code loads it when a task matches its description.

How do I install Hotspots in Codex?

Run `npx skills add nwiizo/cargo-coupling --skill hotspots -a codex`. Or copy the skill folder (.claude/skills/hotspots in nwiizo/cargo-coupling) into .agents/skills/hotspots in your project. Codex loads it when a task matches its description.

Can I use Hotspots 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 nwiizo/cargo-coupling --skill hotspots -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/hotspots, .gemini/skills/hotspots, .github/skills/hotspots and .opencode/skills/hotspots in your project.

What does Hotspots need to run?

SKILL.md names no scripts, command-line tools or credentials: Hotspots is instructions for the agent only.

Does Hotspots 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 Hotspots 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 Hotspots use?

Hotspots is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Hotspots use?

About 260 tokens (SKILL.md is roughly 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 Hotspots?

Skills that share tags, products or a category with Hotspots: Migrate Core Code to Submodules (tinyhumansai/openhuman, 42k stars), Rust Best Practices (farm-fe/farm, 5.6k stars), RTK Rust Design Patterns (rtk-ai/rtk, 83k stars) and RTK Rust Code Simplifier (rtk-ai/rtk, 83k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Hotspots?

nwiizo (a GitHub user) maintains it in nwiizo/cargo-coupling, which has 111 GitHub stars. The repository holds 12 skills in this directory. The repository was last updated on October 9, 2026.

Source: nwiizo/cargo-coupling on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.