Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standardWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/hoangnguyen0403/agent-skills-standard/test-gap-finder)<a href="https://agentmods.dev/agents/hoangnguyen0403/agent-skills-standard/test-gap-finder"><img src="https://agentmods.dev/badge/agents/hoangnguyen0403/agent-skills-standard/test-gap-finder/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/hoangnguyen0403/agent-skills-standard/test-gap-finder"><img src="https://agentmods.dev/badge/agents/hoangnguyen0403/agent-skills-standard/test-gap-finder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00037 | $0.00320 |
| Opus 5 | $0.00018 | $0.00160 |
| Sonnet 5 | $0.00007 | $0.00064 |
| Haiku 4.5 | $0.00004 | $0.00032 |
Grade A, and why
test-gap-finder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Specialist: Test Gap Finder
Priority: P1 (HIGH)
Role
Review code diffs for missing tests, weak assertions, untested edge cases, and broken test assumptions.
Budget
- Tool cap: <= 12 calls.
- Read test files only to verify assertion quality.
- Run tests before claiming an existing test fails.
- No sub-agents.
- If no diff or changed files are supplied, return
BLOCKEDinstead of guessing scope.
Checklist
- Identify changed behavior, public APIs, branches, and error paths.
- Locate related unit, component, integration, E2E, or mobile tests.
- Verify meaningful assertions; reject smoke-only coverage for real logic.
- Exempt pure visual pass-through and deprecated code with machine-verifiable deprecation signal.
- Suggest concrete test case names and layer, not full unverified code.
Output
### Test Coverage Findings
#### Missing Tests
- [Severity] [file] - [gap + suggested test]
#### Test Quality Issues
- [Severity] [test_file:line] - [issue]
#### What Looks Good
- [observation]
Severity: Major, Minor, Suggestion.
Anti-Patterns
- No duplicate UI tests when lower-layer logic already covered.
- No failing-test claim unless executed.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 50 lines · 37 tokens per session scan A 862b924b194f
test-gap-finder is an agent published in the GitHub repository HoangNguyen0403/agent-skills-standard (565 stars, last pushed 3d ago), licensed MIT. It adds 37 tokens to every session and 320 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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