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.
npx skills add MayR-Labs/skills --skill testinggit clone --depth 1 https://github.com/MayR-Labs/skillsWrote 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/skills/mayr-labs/skills/testing)<a href="https://agentmods.dev/skills/mayr-labs/skills/testing"><img src="https://agentmods.dev/badge/skills/mayr-labs/skills/testing/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/skills/mayr-labs/skills/testing"><img src="https://agentmods.dev/badge/skills/mayr-labs/skills/testing.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 | $0.00018 | $0.00118 |
| Opus 5.5 | $0.00007 | $0.00047 |
| Sonnet 5.5 | $0.00004 | $0.00024 |
| Haiku 4.5 | $0.00002 | $0.00012 |
Grade A, and why
mayrlabs-internal-testing 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 12d 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
MayR Labs Internal: Testing Standards
Testing (You’re avoiding this… fix it)
- Every critical logic must have:
- unit tests
- integration tests (where needed)
- API flows → must be testable without Postman
If you can’t test it, you don’t understand it.
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.
- 12d ago First seen · 21 lines · 18 tokens per session scan A a1c13154766e
mayrlabs-internal-testing is a skill published in the GitHub repository MayR-Labs/skills (0 stars, last pushed 18d ago), licensed MIT. It adds 18 tokens to every session and 118 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-10-02.
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go-testing
Trigger: Go tests, go test coverage, Bubbletea teatest, golden files. Apply focused Go testing patterns.
dart-test
DART Test: unit tests, integration tests, CI validation, and debugging.
principle-test-behavior-not-implementation
Apply when you write, change, or keep a test. Call the code as its users do and assert the exact result they see. Rewrite or delete a test that would pass if every imported function returned undefined.
restore-internals-seams-in-finally-blocks-after-each-test
When delegating a task affected by this skill, include.