Requirements
rizsotto/Bear
Write, modify, or review a requirement file under docs/requirements -- pick the single owning file, keep the text contract-only, name IDs so they need no explanation, and verify cross-references and…
Discover test coverage gaps that could hide correctness defects
Install Audit Coverage Gaps
$ npx skills add ben-manes/caffeine --skill audit-coverage-gaps -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ben-manes/caffeine audit-coverage-gaps --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/ben-manes/caffeine.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/audit-coverage-gaps .claude/skills/audit-coverage-gaps && 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 "audit-coverage-gaps" agent skill from https://github.com/ben-manes/caffeine/tree/master/.claude/skills/audit-coverage-gaps into .claude/skills/audit-coverage-gaps/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audit-coverage-gaps", 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/ben-manes/caffeine/tree/master/.claude/skills/audit-coverage-gapsType 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 ben-manes/caffeine --skill audit-coverage-gaps -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ben-manes/caffeine audit-coverage-gaps --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ben-manes/caffeine.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/audit-coverage-gaps .agents/skills/audit-coverage-gaps && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "audit-coverage-gaps" agent skill from https://github.com/ben-manes/caffeine/tree/master/.claude/skills/audit-coverage-gaps into .agents/skills/audit-coverage-gaps/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audit-coverage-gaps", 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 ben-manes/caffeine --skill audit-coverage-gaps -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ben-manes/caffeine audit-coverage-gaps --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ben-manes/caffeine.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/audit-coverage-gaps .cursor/skills/audit-coverage-gaps && 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 "audit-coverage-gaps" agent skill from https://github.com/ben-manes/caffeine/tree/master/.claude/skills/audit-coverage-gaps into .cursor/skills/audit-coverage-gaps/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audit-coverage-gaps", 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/ben-manes/caffeine.git --path .claude/skills/audit-coverage-gaps--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 ben-manes/caffeine --skill audit-coverage-gaps -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ben-manes/caffeine audit-coverage-gaps --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ben-manes/caffeine.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/audit-coverage-gaps .gemini/skills/audit-coverage-gaps && 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 "audit-coverage-gaps" agent skill from https://github.com/ben-manes/caffeine/tree/master/.claude/skills/audit-coverage-gaps into .gemini/skills/audit-coverage-gaps/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audit-coverage-gaps", 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 ben-manes/caffeine audit-coverage-gapsInstalls 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 ben-manes/caffeine --skill audit-coverage-gaps -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ben-manes/caffeine.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/audit-coverage-gaps .github/skills/audit-coverage-gaps && 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 "audit-coverage-gaps" agent skill from https://github.com/ben-manes/caffeine/tree/master/.claude/skills/audit-coverage-gaps into .github/skills/audit-coverage-gaps/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audit-coverage-gaps", 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 ben-manes/caffeine --skill audit-coverage-gaps -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ben-manes/caffeine audit-coverage-gaps --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ben-manes/caffeine.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/audit-coverage-gaps .opencode/skills/audit-coverage-gaps && 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 "audit-coverage-gaps" agent skill from https://github.com/ben-manes/caffeine/tree/master/.claude/skills/audit-coverage-gaps into .opencode/skills/audit-coverage-gaps/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "audit-coverage-gaps", 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
audit-coverage-gaps- GitHub stars
- 18k
- Token cost
- ~448 tokens
- SKILL.md length
- 216 words
- Files
- 1
- Skills in repo
- 33
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Discover test coverage gaps that could hide correctness defects
- Works in 4 steps: For each public method, identify the… → For each edge case, trace the code path.… → Identify combinatorially hard behavioral… → …
- Tasks that involve Test coverage
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Audit Coverage Gaps is an agent skill from ben-manes/caffeine. Discover test coverage gaps that could hide correctness defects
Its SKILL.md is about 450 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: A high performance caching library for Java. The licence is Apache-2.0.
When your agent uses it
- Tasks that involve Test coverage
Example prompts
- “/audit-coverage-gaps”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- For each public method, identify the hardest-to-test edge cases
- For each edge case, trace the code path. Does the code handle it correctly?
- Identify combinatorially hard behavioral dimensions
- For each candidate gap, provide a minimal test case with the specific
What it can do on your machine
Read from SKILL.md and the folder at commit e972fb0. 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.
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
Audit Coverage Gaps loads about 448 tokens when it runs. Until then it costs about 21 tokens; SKILL.md has 216 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 ben-manes/caffeine at commit e972fb0, republished under its Apache-2.0 licence (© ben-manes). 216 words, ~448 tokens.
Download SKILL.mdSave it as
.claude/skills/audit-coverage-gaps/SKILL.md (or your agent's skills folder).- name
- audit-coverage-gaps
- description
- Discover test coverage gaps that could hide correctness defects
- context
- fork
- agent
- auditor
- disable-model-invocation
- true
Assume the existing tests miss at least one real defect.
For each public method, identify the hardest-to-test edge cases:
- Null values (where permitted)
- Maximum/minimum weight
- Zero-duration expiration
- Mapping functions that return the same instance
- Mapping functions that throw
- Weighers that throw
- Expiry callbacks that throw
- CompletableFuture values (async cache edge cases)
- Keys/values with adversarial hashCode/equals
For each edge case, trace the code path. Does the code handle it correctly?
Identify combinatorially hard behavioral dimensions:
- Operation A on expired entry during concurrent operation B
- Exception in user callback X while holding lock Y
- GC collecting reference R between code points P and Q
- Fast path falls through to slow path under contention (e.g., entry appears expired on fast path, recovers under lock on slow path)
- Async cache: future completes between check and action (e.g., isComputingAsync returns true, but future completes before the code that depends on that check executes)
For each candidate gap, provide a minimal test case with the specific cache configuration and thread interleaving needed to reach the code path.
Priority ordering:
- Paths involving the catch-commit-rethrow pattern (doComputeIfAbsent, remap)
- Slow paths reachable only via contention (synchronized blocks after optimistic checks)
- Interactions between expiration and the async value lifecycle (ASYNC_EXPIRY, isComputingAsync)
Focus only on behavioral coverage gaps that could hide correctness bugs.
© ben-manes, Apache-2.0. 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/audit-coverage-gaps of ben-manes/caffeine.
Open the folder on GitHubat commit e972fb0
Compare with similar skills
Audit Coverage Gaps 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 |
|---|---|---|---|---|---|---|
| Audit Coverage Gaps this skillben-manes/caffeine | 18k | — | ~448 | Automated safety check: Pass | Apache-2.0 | |
| Requirementsrizsotto/Bear | 6.5k | — | ~2k | Automated safety check: Pass | GPL-3.0 | |
| Crap Analysisardalis/RiverBooks | 135 | 2 repos | ~3.4k | Automated safety check: Pass | None | |
| Code Coverages3s-project/s3s | 311 | — | ~789 | Automated safety check: Pass | Apache-2.0 | |
| Project Statusbactopia/bactopia | 522 | — | ~787 | Automated safety check: Pass | MIT | |
| Check Coverageldayton/Dippy | 243 | — | ~403 | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Audit Coverage Gaps
What does Audit Coverage Gaps do?
Discover test coverage gaps that could hide correctness defects. Audit Coverage Gaps is an agent skill from ben-manes/caffeine.
When should I use Audit Coverage Gaps?
Audit Coverage Gaps fits situations like: tasks that involve Test coverage.
How do I install Audit Coverage Gaps in Claude Code?
Run `npx skills add ben-manes/caffeine --skill audit-coverage-gaps -a claude-code`. Or copy the skill folder (.claude/skills/audit-coverage-gaps in ben-manes/caffeine) into .claude/skills/audit-coverage-gaps in your project. Claude Code loads it when a task matches its description.
How do I install Audit Coverage Gaps in Codex?
Run `npx skills add ben-manes/caffeine --skill audit-coverage-gaps -a codex`. Or copy the skill folder (.claude/skills/audit-coverage-gaps in ben-manes/caffeine) into .agents/skills/audit-coverage-gaps in your project. Codex loads it when a task matches its description.
Can I use Audit Coverage Gaps 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 ben-manes/caffeine --skill audit-coverage-gaps -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/audit-coverage-gaps, .gemini/skills/audit-coverage-gaps, .github/skills/audit-coverage-gaps and .opencode/skills/audit-coverage-gaps in your project.
What does Audit Coverage Gaps need to run?
SKILL.md names no scripts, command-line tools or credentials: Audit Coverage Gaps is instructions for the agent only.
Does Audit Coverage Gaps 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 Audit Coverage Gaps 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 Audit Coverage Gaps use?
Audit Coverage Gaps is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Audit Coverage Gaps use?
About 448 tokens (SKILL.md is roughly 1.8k 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 Audit Coverage Gaps?
Skills that share tags, products or a category with Audit Coverage Gaps: Requirements (rizsotto/Bear, 6.5k stars), Crap Analysis (ardalis/RiverBooks, 135 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 Audit Coverage Gaps?
ben-manes (a GitHub user) maintains it in ben-manes/caffeine, which has 17,880 GitHub stars. The repository holds 33 skills in this directory. The repository was last updated on October 6, 2026.
Source: ben-manes/caffeine on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.