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 necoz-oss/is-kit --skill prettier-formatgit clone --depth 1 https://github.com/necoz-oss/is-kitWrote 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/necoz-oss/is-kit/prettier-format)<a href="https://agentmods.dev/skills/necoz-oss/is-kit/prettier-format"><img src="https://agentmods.dev/badge/skills/necoz-oss/is-kit/prettier-format/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/necoz-oss/is-kit/prettier-format"><img src="https://agentmods.dev/badge/skills/necoz-oss/is-kit/prettier-format.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 | $0.00040 | $0.00368 |
| Opus 5.5 | $0.00016 | $0.00147 |
| Sonnet 5.5 | $0.00008 | $0.00074 |
| Haiku 4.5 | $0.00004 | $0.00037 |
Grade A, and why
prettier-format 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 5d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- prettier-format — 100% identical, 0 lines differ
What it actually says
Prettier Format (is-kit)
Overview
Format or check code using this repo's Prettier configuration and ignore rules. Prefer local binaries and the project's package manager.
Workflow
- Read repository instructions.
- Open
AGENTS.mdin the repo root and follow all constraints (commands, formatting, tests, etc.). - If
AGENTS.mdis missing, ask how to proceed.
- Determine intent and scope.
- Use
--checkfor "verify formatting" requests. - Use
--writefor "format" or "fix" requests. - Ask for target paths when not specified; do not assume whole repo unless requested.
- Run Prettier with local tooling.
- Prefer
./node_modules/.bin/prettier. - Alternative:
pnpm prettier(repo uses pnpm). - Avoid
npxunless the user explicitly approves network downloads.
- Report results.
- Summarize changed files or confirm a clean check.
- If a command fails, include the error and propose the next step.
Quick Commands
- Format repo:
./node_modules/.bin/prettier --write . - Check formatting:
./node_modules/.bin/prettier --check . - Format paths:
./node_modules/.bin/prettier --write src tests - Check paths:
pnpm prettier --check src tests
Resources
scripts/
run_prettier.sh: Run Prettier with--writeor--checkand auto-pick a runner.
What ships with it
1 file 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.
- 5d ago First seen · 48 lines · 40 tokens per session scan A ba1303dc5ada
prettier-format is a skill published in the GitHub repository necoz-oss/is-kit (163 stars, last pushed today), licensed MIT. It adds 40 tokens to every session and 368 once invoked, about $0.0002 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 2026-11-01.
Other skills, from other repositories
use-is-kit
Create, compose, migrate, and review TypeScript runtime type guards with is-kit. Use when adding reusable guards; replacing typeof, null checks, or handwritten type predicates; narrowing unknown values; validating JSON or API responses; building collection or object schemas with struct or typedStruct; or reviewing…
learn
Extract reusable patterns from non-trivial work in the is-kit repository and store them as project knowledge. Use after meaningful API design, type-system work, debugging, or compatibility discoveries.
prettier-format
Run Prettier for the is-kit repository. Use when asked to format or check formatting in this project. Always consult AGENTS.md in the repo root before executing commands.
write-script-bun
MUST use when writing TypeScript scripts. Bun is the default and preferred TypeScript runtime — pick it for TypeScript unless the script specifically needs Deno.
write-script-deno
Use ONLY when a TypeScript script specifically requires the Deno runtime (Deno stdlib or deno.land URL imports). For all other TypeScript, use write-script-bun instead.
write-script-python3
MUST use when writing Python scripts.