Agent skill

Bun Test Coverage

A skill your agent uses for test coverage with Bun, --coverage flag, lcov reports, thresholds, and CI integration.

MITAuto-check passedTesting & QA

Install Bun Test Coverage

skills CLI

$ npx skills add secondsky/claude-skills --skill bun-test-coverage -a claude-code

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

GitHub CLI

$ gh skill install secondsky/claude-skills bun-test-coverage --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/secondsky/claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/bun/skills/bun-test-coverage .claude/skills/bun-test-coverage && 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/

Paste into Claude Code

Install the "bun-test-coverage" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/bun/skills/bun-test-coverage into .claude/skills/bun-test-coverage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun-test-coverage", 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

$skill-installer install https://github.com/secondsky/claude-skills/tree/main/plugins/bun/skills/bun-test-coverage

Type 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.

skills CLI

$ npx skills add secondsky/claude-skills --skill bun-test-coverage -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills bun-test-coverage --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/bun/skills/bun-test-coverage .agents/skills/bun-test-coverage && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "bun-test-coverage" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/bun/skills/bun-test-coverage into .agents/skills/bun-test-coverage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun-test-coverage", 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.

skills CLI

$ npx skills add secondsky/claude-skills --skill bun-test-coverage -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills bun-test-coverage --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/bun/skills/bun-test-coverage .cursor/skills/bun-test-coverage && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "bun-test-coverage" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/bun/skills/bun-test-coverage into .cursor/skills/bun-test-coverage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun-test-coverage", 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

$ gemini skills install https://github.com/secondsky/claude-skills.git --path plugins/bun/skills/bun-test-coverage

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add secondsky/claude-skills --skill bun-test-coverage -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills bun-test-coverage --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/bun/skills/bun-test-coverage .gemini/skills/bun-test-coverage && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "bun-test-coverage" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/bun/skills/bun-test-coverage into .gemini/skills/bun-test-coverage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun-test-coverage", 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.

GitHub CLI

$ gh skill install secondsky/claude-skills bun-test-coverage

Installs 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).

skills CLI

$ npx skills add secondsky/claude-skills --skill bun-test-coverage -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/bun/skills/bun-test-coverage .github/skills/bun-test-coverage && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "bun-test-coverage" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/bun/skills/bun-test-coverage into .github/skills/bun-test-coverage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun-test-coverage", 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.

skills CLI

$ npx skills add secondsky/claude-skills --skill bun-test-coverage -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install secondsky/claude-skills bun-test-coverage --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/secondsky/claude-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/bun/skills/bun-test-coverage .opencode/skills/bun-test-coverage && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "bun-test-coverage" agent skill from https://github.com/secondsky/claude-skills/tree/main/plugins/bun/skills/bun-test-coverage into .opencode/skills/bun-test-coverage/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bun-test-coverage", 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: bun-test-coverage
GitHub stars: 227
Token cost: ~834 tokens
SKILL.md length: 134 words
Files: 1
Skills in repo: 169
Repo updated: Sep 28, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

A skill your agent uses for test coverage with Bun, --coverage flag, lcov reports, thresholds, and CI integration.

Works in 4 steps: Set realistic thresholds - Start at 60%,… → Exclude generated files - Mock files,… → Focus on critical paths - Business logic… → …
Test coverage with Bun
SKILL.md covers Enabling Coverage, Configuration in bunfig.toml, Coverage Output and Coverage Reporters, plus 7 more sections
Calls bun

What it does

Bun Test Coverage is an agent skill from secondsky/claude-skills. Use for test coverage with Bun, --coverage flag, lcov reports, thresholds, and CI integration.

Its SKILL.md is about 830 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 Testing & QA, covering Test coverage. The repository describes itself as: Production-ready skills for Claude Code CLI - Cloudflare, React, Tailwind v4, and AI integrations. The licence is MIT.

When your agent uses it

Test coverage with Bun
--coverage flag

Example prompts

“/bun-test-coverage”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

Set realistic thresholds - Start at 60%, increase gradually
Exclude generated files - Mock files, type definitions
Focus on critical paths - Business logic over boilerplate
Run in CI - Prevent coverage regression

What it can do on your machine

Read from SKILL.md and the folder at commit 8837836. 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:
- bun
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

Bun Test Coverage loads about 834 tokens when it runs. Until then it costs about 28 tokens; SKILL.md has 134 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~28
When it runs · the whole SKILL.md, loaded when a task matches: ~834

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 secondsky/claude-skills at commit 8837836, republished under its MIT licence (© secondsky). 134 words, ~834 tokens.

Download SKILL.mdSave it as .claude/skills/bun-test-coverage/SKILL.md (or your agent's skills folder).

name: bun-test-coverage
description: Use for test coverage with Bun, --coverage flag, lcov reports, thresholds, and CI integration.
metadata.version: 1.0.0
license: MIT

Bun Test Coverage

Bun has built-in code coverage reporting without additional dependencies.

Enabling Coverage

bash

# Enable coverage
bun test --coverage

# With threshold (fail if below)
bun test --coverage --coverage-threshold 80

Configuration in bunfig.toml

toml

[test]
coverage = true
coverageThreshold = 0.8  # 80% minimum
coverageDir = "./coverage"

# Patterns to ignore
coverageSkipTestFiles = true

Coverage Output

------------------|---------|---------|-------------------
File              | % Funcs | % Lines | Uncovered Line #s
------------------|---------|---------|-------------------
All files         |   85.71 |   89.23 |
 src/index.ts     |  100.00 |  100.00 |
 src/utils.ts     |   75.00 |   82.35 | 23-25, 41-43
 src/api.ts       |   80.00 |   85.00 | 67, 89-92
------------------|---------|---------|-------------------

Coverage Reporters

bash

# Default console output
bun test --coverage

# Generate lcov report
bun test --coverage --coverage-reporter=lcov

# Multiple reporters
bun test --coverage --coverage-reporter=text --coverage-reporter=lcov

Available Reporters

Reporter	Output
`text`	Console table (default)
`lcov`	`coverage/lcov.info` for CI tools
`json`	`coverage/coverage.json`

Coverage Thresholds

Set minimum coverage requirements:

bash

# Fail if coverage < 80%
bun test --coverage --coverage-threshold 80

# Per-metric thresholds in bunfig.toml

toml

[test]
coverage = true
coverageThreshold = {
  lines = 80,
  functions = 75,
  branches = 70
}

Excluding Files

toml

[test]
coverage = true

# Skip test files from coverage
coverageSkipTestFiles = true

# Patterns to exclude
coverageIgnore = [
  "**/*.test.ts",
  "**/fixtures/**",
  "**/mocks/**"
]

CI Integration

GitHub Actions

yaml

- name: Run tests with coverage
  run: bun test --coverage --coverage-reporter=lcov

- name: Upload coverage to Codecov
  uses: codecov/codecov-action@v5
  with:
    files: ./coverage/lcov.info

Output Directory

bash

# Custom output directory
bun test --coverage --coverage-dir=./reports/coverage

Programmatic Coverage

typescript

import { test, expect } from "bun:test";

// Get coverage data programmatically
const coverage = Bun.coverage;

// Access after tests complete
process.on("exit", () => {
  console.log(coverage.getCoverageData());
});

Common Errors

Error	Cause	Fix
`Coverage threshold not met`	Coverage below threshold	Increase test coverage
`No coverage data`	Files not executed	Check test includes file
`lcov not found`	Missing reporter	Add `--coverage-reporter=lcov`

Best Practices

Set realistic thresholds - Start at 60%, increase gradually
Exclude generated files - Mock files, type definitions
Focus on critical paths - Business logic over boilerplate
Run in CI - Prevent coverage regression

When to Load References

Load references/reporters.md when:

Custom reporter configuration
CI/CD integration details
Codecov/Coveralls setup

Files

Just SKILL.md in plugins/bun/skills/bun-test-coverage of secondsky/claude-skills.

Open the folder on GitHubat commit 8837836

Compare with similar skills

Bun Test Coverage 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.

Bun Test Coverage compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Bun Test Coverage this skillsecondsky/claude-skills	227	—	~834	Automated safety check: Pass	MIT	9 days ago
Requirementsrizsotto/Bear	6.5k	—	~2k	Automated safety check: Pass	GPL-3.0	today
Crap Analysisardalis/RiverBooks	134	2 repos	~3.4k	Automated safety check: Pass	None	yesterday
Code Coverages3s-project/s3s	311	—	~789	Automated safety check: Pass	Apache-2.0	today
Project Statusbactopia/bactopia	522	—	~787	Automated safety check: Pass	MIT	2 mo ago
Check Coverageldayton/Dippy	243	—	~403	Automated safety check: Pass	MIT	3 mo ago

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Questions about Bun Test Coverage

What does Bun Test Coverage do?

A skill your agent uses for test coverage with Bun, --coverage flag, lcov reports, thresholds, and CI integration. Bun Test Coverage is an agent skill from secondsky/claude-skills. Use for test coverage with Bun, --coverage flag, lcov reports, thresholds, and CI integration.

When should I use Bun Test Coverage?

Bun Test Coverage fits situations like: test coverage with Bun; --coverage flag.

How do I install Bun Test Coverage in Claude Code?

Run `npx skills add secondsky/claude-skills --skill bun-test-coverage -a claude-code`. Or copy the skill folder (plugins/bun/skills/bun-test-coverage in secondsky/claude-skills) into .claude/skills/bun-test-coverage in your project. Claude Code loads it when a task matches its description.

How do I install Bun Test Coverage in Codex?

Run `npx skills add secondsky/claude-skills --skill bun-test-coverage -a codex`. Or copy the skill folder (plugins/bun/skills/bun-test-coverage in secondsky/claude-skills) into .agents/skills/bun-test-coverage in your project. Codex loads it when a task matches its description.

Can I use Bun Test Coverage 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 secondsky/claude-skills --skill bun-test-coverage -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/bun-test-coverage, .gemini/skills/bun-test-coverage, .github/skills/bun-test-coverage and .opencode/skills/bun-test-coverage in your project.

What does Bun Test Coverage need to run?

Going by SKILL.md and its folder, Bun Test Coverage needs the command-line tools its instructions call (bun).

Does Bun Test Coverage 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 Bun Test Coverage 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 Bun Test Coverage use?

Bun Test Coverage 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 Bun Test Coverage use?

About 834 tokens (SKILL.md is roughly 3.3k 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 Bun Test Coverage?

Skills that share tags, products or a category with Bun Test Coverage: Requirements (rizsotto/Bear, 6.5k stars), Crap Analysis (ardalis/RiverBooks, 134 stars), Code Coverage (s3s-project/s3s, 311 stars) and Project Status (bactopia/bactopia, 522 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Bun Test Coverage?

secondsky (a GitHub user) maintains it in secondsky/claude-skills, which has 227 GitHub stars. The repository holds 169 skills in this directory. The repository was last updated on September 28, 2026.

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

Install Bun Test Coverage

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Bun Test Coverage

Enabling Coverage

Configuration in bunfig.toml

Coverage Output

Coverage Reporters

Available Reporters

Coverage Thresholds

Excluding Files

CI Integration

GitHub Actions

Output Directory

Programmatic Coverage

Common Errors

Best Practices

When to Load References

Files

Compare with similar skills

Similar skills

More from secondsky/claude-skills

Related

Questions about Bun Test Coverage