Borrowing it
Nothing to install: this file belongs to nyaomaru/is-kit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/nyaomaru/is-kit/main/AGENTS.mdgit clone --depth 1 https://github.com/nyaomaru/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/instructions/nyaomaru/is-kit/agents-md)<a href="https://agentmods.dev/instructions/nyaomaru/is-kit/agents-md"><img src="https://agentmods.dev/badge/instructions/nyaomaru/is-kit/agents-md/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/instructions/nyaomaru/is-kit/agents-md"><img src="https://agentmods.dev/badge/instructions/nyaomaru/is-kit/agents-md.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 | $0.02536 | $0.02536 |
| Opus 5.5 | $0.01014 | $0.01014 |
| Sonnet 5.5 | $0.00507 | $0.00507 |
| Haiku 4.5 | $0.00254 | $0.00254 |
Grade A, and why
is-kit AGENTS.md 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 220 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository Guidelines
Project Structure & Modules
src/: Library source (TypeScript). Key areas:core/: primitives and building blocks- guards:
primitive.ts,object.ts - logic:
logic.ts(and,andAll,or,not,guardIn) - equality:
equals.ts(equals,equalsBy,equalsKey) - parsing:
parse.ts(safeParse,safeParseWith) - nullability:
nullish.ts(nullable,nonNull,nullish,optional,required) - helpers:
define.ts,predicate.ts - combinators:
core/combinators/*(arrayOf,tupleOf,oneOf,recordOf,struct,oneOfValues)
- guards:
types/: shared type utilitiesutils/: internal helpers (e.g.,toBooleanPredicates)- Entry:
src/index.tsre-exports public API (core,types,utils).
tests/: Jest runtime tests, mirroringsrc/paths (e.g.,tests/core/combinators/struct.test.ts).tests-d/:tsdtype tests, mirroringsrc/paths (e.g.,tests-d/core/combinators/struct.test-d.ts).dist/: Build output (ESM.mjs, CJS.js, and.d.ts) generated bytsup.- Config:
tsconfig*.json,tests/tsconfig.json,tests-d/tsconfig.json,tsup.config.ts,jest.config.cjs,.oxlintrc.json.
Build, Test, and Development
- Install:
pnpm install - Lint:
pnpm lint— Oxlint over the repo. - Build:
pnpm build— bundles viatsuptodist/(ESM + CJS + types). - Test (runtime):
pnpm test— runs Jest specs intests/. - Test (types):
pnpm test:types— runstsdspecs intests-d/.
CI runs lint, build, unit tests, and type tests on PRs against main.
Coding Style & Naming
- Language: TypeScript (
strict: true). Target ES2022; outputs ESM/CJS. - Imports: use alias
@/*for sources (e.g.,import { struct } from '@/core/combinators'). - Formatting: Oxfmt; 2-space indent; single quotes; semicolons.
- Lint: Oxlint config in
.oxlintrc.json. Project rules:complexity≤ 7;no-unused-vars/no-undefwarn; ignoresdist/*. - Files: kebab-case for modules (
core/combinators/tuple.ts), named exports; keep public API re-exported fromsrc/index.ts.
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.
- 4d ago Changed 8ce0607dc2d6
- 18d ago Changed · +7 lines · +191 tokens per session 98175bf7b6f8
- 1mo ago First seen · 213 lines · 2,345 tokens per session scan A 359a342d76fa
is-kit AGENTS.md is an instructions file published in the GitHub repository nyaomaru/is-kit (134 stars, last pushed 3d ago), licensed MIT. It adds 2,536 tokens to every session, about $0.0101 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 2026-09-01.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
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Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
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Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.