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 agentmods add instructions/chenxin-yan/crust/agents-mdgit clone --depth 1 https://github.com/chenxin-yan/crustWrote 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/chenxin-yan/crust/agents-md)<a href="https://agentmods.dev/instructions/chenxin-yan/crust/agents-md"><img src="https://agentmods.dev/badge/instructions/chenxin-yan/crust/agents-md.svg" alt="Measured on agentmods" 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 | $0.00374 | $0.00374 |
| Opus 5 | $0.00187 | $0.00187 |
| Sonnet 5 | $0.00075 | $0.00075 |
| Haiku 4.5 | $0.00037 | $0.00037 |
Grade A, and why
crust 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 today.
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
Tests
bun:test:import { describe, expect, it, beforeEach, afterEach } from "bun:test"- Unit tests: co-located (
src/foo.test.tsbesidesrc/foo.ts) - Integration/smoke tests: package-local
packages/<pkg>/tests/
Documentation
Update relevant docs/code comments in the same change as the code. Stale docs = bug.
Doc surfaces:
apps/docs/content/docs/guide/*.mdx— conceptual guidesapps/docs/content/docs/modules/*.mdx— per-package referenceapps/docs/content/docs/api/*.mdx— public API reference
Before submitting:
- Examples in changed docs compile against the new API
- Cross-links resolve;
meta.jsonupdated if pages added/removed/reordered - Package README and
modules/<pkg>.mdxagree on install, exports, quick example
Changesets
Do not edit CHANGELOG.md manually. Run bunx changeset to record user-visible changes; release tooling consumes them. Skip changesets for changes with no end-user behavior impact (internal refactors, tests, docs, CI, tooling).
Agent skills
Issue tracker
Issues are tracked in GitHub Issues (chenxin-yan/crust) via the gh CLI. See docs/agents/issue-tracker.md.
Triage labels
Default five-role vocabulary: needs-triage, needs-info, ready-for-agent, ready-for-human, wontfix. See docs/agents/triage-labels.md.
Domain docs
Create CONTEXT.md and docs/adr/ at the repo root lazily when domain terms or architecture decisions need recording. See docs/agents/domain.md.
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.
- today Changed · -1 lines · -14 tokens per session a96a90fd5dae
- 5d ago First seen · 41 lines · 388 tokens per session scan A ef69ce63a01f
crust AGENTS.md is an instructions file published in the GitHub repository chenxin-yan/crust (403 stars, last pushed today), licensed MIT. It adds 374 tokens to every session, about $0.0019 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 2026-08-30.
Other instructions, from other repositories
eve AGENTS.md
AGENTS.md instructions for vercel/eve, covering agents.md, about eve, repository layout, git workflow and commands.
eve CLAUDE.md
Claude Code instructions for vercel/eve, a project described as: The Open Framework for Building Agents.
agentos CLAUDE.md
Claude Code instructions for rivet-dev/agentos, covering agentos, boundaries, security model, sqlite schema ownership and runtime and registry.
AgentEval copilot-instructions.md
Copilot instructions for AgentEvalHQ/AgentEval, covering agenteval - ai coding agent instructions, architecture overview, environment setup, optional: secondary models for comparison and build & test commands.
AgentEval tracing.instructions.md
Guidelines for implementing trace recording and replay.
zhin zhin-plugin.instructions.md
Instructions for zhinjs/zhin, covering zhin plugin runtime authoring, package contract, convention directories, imports and native typescript and command routes.