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 lootlog/monorepo --skill test-developmentgit clone --depth 1 https://github.com/lootlog/monorepoWrote 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/lootlog/monorepo/test-development)<a href="https://agentmods.dev/skills/lootlog/monorepo/test-development"><img src="https://agentmods.dev/badge/skills/lootlog/monorepo/test-development/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/lootlog/monorepo/test-development"><img src="https://agentmods.dev/badge/skills/lootlog/monorepo/test-development.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 | $0.00042 | $0.00210 |
| Opus 5.5 | $0.00017 | $0.00084 |
| Sonnet 5.5 | $0.00008 | $0.00042 |
| Haiku 4.5 | $0.00004 | $0.00021 |
Grade A, and why
test-development 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.
This is a copy
100% identical to test-development — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
Choose branches from the task's acceptance criteria before editing:
- Runtime behavior: The intended result is observable when code executes. Read runtime.md.
- Compiler behavior: The intended result is TypeScript accepting, rejecting, or inferring a consumer expression in a particular way. Read types.md.
An exported signature alone is validated by pnpm check; it enters the compiler
branch only when its inference, assignability, rejection, overload selection, or
displayed type is part of the task. Some changes require both branches because
they independently change runtime and compiler behavior.
The task is complete when each intended behavior in scope has the relevant focused coverage, targeted tests pass, and applicable root checks pass or are reported as not runnable.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 Changed · +8 lines · +9 tokens per session b9eeb39cf3ea
- 1mo ago First seen · 14 lines · 33 tokens per session scan A ded4ade9f625
test-development is a skill published in the GitHub repository lootlog/monorepo (29 stars, last pushed today), licensed MIT. It adds 42 tokens to every session and 210 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to test-development, differing in 0 lines, and is treated as a copy.
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