TDD Guide
alirezarezvani/claude-skills
Test-driven development skill for writing unit tests, generating test fixtures and mocks, analyzing coverage gaps, and guiding red-green-refactor workflows across Jest, Pytest, JUnit, Vitest, and…
Analyzes test coverage gaps and suggests test cases for untested code paths.
Install Test Coverage Analyzer
$ npx skills add aiskillstore/marketplace --skill test-coverage-analyzer -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace test-coverage-analyzer --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/crazydubya/test-coverage-analyzer .claude/skills/test-coverage-analyzer && 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 "test-coverage-analyzer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/crazydubya/test-coverage-analyzer into .claude/skills/test-coverage-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-coverage-analyzer", 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/crazydubya/test-coverage-analyzerType 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 test-coverage-analyzer -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace test-coverage-analyzer --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/crazydubya/test-coverage-analyzer .agents/skills/test-coverage-analyzer && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "test-coverage-analyzer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/crazydubya/test-coverage-analyzer into .agents/skills/test-coverage-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-coverage-analyzer", 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 test-coverage-analyzer -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace test-coverage-analyzer --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/crazydubya/test-coverage-analyzer .cursor/skills/test-coverage-analyzer && 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 "test-coverage-analyzer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/crazydubya/test-coverage-analyzer into .cursor/skills/test-coverage-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-coverage-analyzer", 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/crazydubya/test-coverage-analyzer--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 test-coverage-analyzer -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace test-coverage-analyzer --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/crazydubya/test-coverage-analyzer .gemini/skills/test-coverage-analyzer && 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 "test-coverage-analyzer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/crazydubya/test-coverage-analyzer into .gemini/skills/test-coverage-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-coverage-analyzer", 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 test-coverage-analyzerInstalls 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 test-coverage-analyzer -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/crazydubya/test-coverage-analyzer .github/skills/test-coverage-analyzer && 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 "test-coverage-analyzer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/crazydubya/test-coverage-analyzer into .github/skills/test-coverage-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-coverage-analyzer", 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 test-coverage-analyzer -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 test-coverage-analyzer --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/crazydubya/test-coverage-analyzer .opencode/skills/test-coverage-analyzer && 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 "test-coverage-analyzer" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/crazydubya/test-coverage-analyzer into .opencode/skills/test-coverage-analyzer/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "test-coverage-analyzer", 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
test-coverage-analyzer- GitHub stars
- 430
- Token cost
- ~1.8k tokens
- SKILL.md length
- 668 words
- Files
- 6 (incl. scripts)
- Skills in repo
- 1,085
- Repo updated
- First seen
- Licence
- None found
At a glance
Analyzes test coverage gaps and suggests test cases for untested code paths.
- Works in 10 steps: Detect Testing Framework → Locate Coverage Reports → Parse Coverage Data → …
- User requests test improvements
- SKILL.md covers When to Use This Skill, Instructions, Best Practices and Running Coverage Reports, plus 1 more section
- Runs Shell, Go, JavaScript and Python scripts from its folder; calls go, npm and pytest
What it does
Test Coverage Analyzer is an agent skill from aiskillstore/marketplace. Analyzes test coverage gaps and suggests test cases for untested code paths. Use when user requests test improvements, coverage analysis, or wants to increase test coverage.
Its SKILL.md is about 1.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including scripts (for example `scripts/parse-coverage.sh`, `skill-report.json` and `templates/test-template.js`).
It sits in Testing & QA, covering Test coverage. It works with npm, Jest, pytest and Vitest. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- User requests test improvements
- Coverage analysis
- Wants to increase test coverage
Example prompts
- “Use the test-coverage-analyzer skill to analyz test coverage gaps and suggests test cases for untested code paths”
- “/test-coverage-analyzer”
Requirements
- Python 3
- Node.js
- A Bash shell
- Pre-approved tools (allowed-tools): Read, Grep, Glob, Bash, Write
Workflow steps
10 steps, taken from the step headings in SKILL.md.
- Detect Testing Framework
- Locate Coverage Reports
- Parse Coverage Data
- Identify Coverage Gaps
- Analyze Untested Code Paths
- Generate Test Suggestions
- Create Test Stubs (Optional)
- Calculate Coverage Metrics
- Prioritize Recommendations
- Output Format
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 these tools, so the agent can use them without asking each time:
ReadGrepGlobBashWrite
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 1 file in scripts/ (Shell, Go, JavaScript and Python), which the agent can run.
Shell commands in SKILL.md call:
gonpmpytestjestvitestmvn
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use 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
Test Coverage Analyzer loads about 1.8k tokens when it runs. Until then it costs about 49 tokens; SKILL.md has 668 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: Read, Grep, Glob, Bash, Write
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 668 words (~1,795 tokens).
“This skill helps identify gaps in test coverage and suggests specific test cases to improve code quality.”
- name
- test-coverage-analyzer
- allowed-tools
- Read, Grep, Glob, Bash, Write
Files
SKILL.md and 5 other files (scripts) in skills/crazydubya/test-coverage-analyzer of aiskillstore/marketplace.
- SKILL.md
- scripts/parse-coverage.sh
- skill-report.json
- templates/test-template.go
- templates/test-template.js
- templates/test-template.py
Open the folder on GitHubat commit 4ac52da
Compare with similar skills
Test Coverage Analyzer 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 |
|---|---|---|---|---|---|---|
| Test Coverage Analyzer this skillaiskillstore/marketplace | 430 | — | ~1.8k | Automated safety check: Notes | None | |
| TDD Guidealirezarezvani/claude-skills | 28k | — | ~3.4k | Automated safety check: Pass | MIT | |
| TDD GuideLeoYeAI/openclaw-master-skills | 2.2k | — | ~1.4k | Automated safety check: Pass | MIT | |
| Unit Testingpetrkindlmann/qa-skills | 163 | — | ~3.9k | Automated safety check: Pass | MIT | |
| TDD GuideaAAaqwq/AGI-Super-Team | 105 | 2 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Testing Unityonatangross/orchestkit | 288 | — | ~2.4k | Automated safety check: Pass | MIT |
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Categories
Questions about Test Coverage Analyzer
What does Test Coverage Analyzer do?
Analyzes test coverage gaps and suggests test cases for untested code paths. Test Coverage Analyzer is an agent skill from aiskillstore/marketplace. Analyzes test coverage gaps and suggests test cases for untested code paths.
When should I use Test Coverage Analyzer?
Test Coverage Analyzer fits situations like: user requests test improvements; coverage analysis; wants to increase test coverage.
How do I install Test Coverage Analyzer in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill test-coverage-analyzer -a claude-code`. Or copy the skill folder (skills/crazydubya/test-coverage-analyzer in aiskillstore/marketplace) into .claude/skills/test-coverage-analyzer in your project. Claude Code loads it when a task matches its description.
How do I install Test Coverage Analyzer in Codex?
Run `npx skills add aiskillstore/marketplace --skill test-coverage-analyzer -a codex`. Or copy the skill folder (skills/crazydubya/test-coverage-analyzer in aiskillstore/marketplace) into .agents/skills/test-coverage-analyzer in your project. Codex loads it when a task matches its description.
Can I use Test Coverage Analyzer 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 test-coverage-analyzer -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/test-coverage-analyzer, .gemini/skills/test-coverage-analyzer, .github/skills/test-coverage-analyzer and .opencode/skills/test-coverage-analyzer in your project.
What does Test Coverage Analyzer need to run?
Going by SKILL.md and its folder, Test Coverage Analyzer needs a shell, Go, JavaScript and Python for the scripts in its folder and the command-line tools its instructions call (go, npm, pytest, jest, vitest and mvn). Our summary lists: Python 3; Node.js; A Bash shell. Its frontmatter pre-approves these tools: Read, Grep, Glob, Bash, Write.
Does Test Coverage Analyzer access the network?
SKILL.md contains no URLs. Its commands use npm, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Test Coverage Analyzer safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. 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 Test Coverage Analyzer use?
No licence was found for Test Coverage Analyzer or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Test Coverage Analyzer use?
About 1.8k tokens (SKILL.md is roughly 7.2k 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 Test Coverage Analyzer?
Skills that share tags, products or a category with Test Coverage Analyzer: TDD Guide (alirezarezvani/claude-skills, 28k stars), TDD Guide (LeoYeAI/openclaw-master-skills, 2.2k stars), Unit Testing (petrkindlmann/qa-skills, 163 stars) and TDD Guide (aAAaqwq/AGI-Super-Team, 105 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Test Coverage Analyzer?
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.