Borrowing it
Nothing to install: this file belongs to ttktjmt/mjswan. 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/ttktjmt/mjswan/main/AGENTS.mdgit clone --depth 1 https://github.com/ttktjmt/mjswanWrote 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/ttktjmt/mjswan/agents-md)<a href="https://agentmods.dev/instructions/ttktjmt/mjswan/agents-md"><img src="https://agentmods.dev/badge/instructions/ttktjmt/mjswan/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/ttktjmt/mjswan/agents-md"><img src="https://agentmods.dev/badge/instructions/ttktjmt/mjswan/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 | $0.00619 | $0.00619 |
| Opus 5.5 | $0.00248 | $0.00248 |
| Sonnet 5.5 | $0.00124 | $0.00124 |
| Haiku 4.5 | $0.00062 | $0.00062 |
Grade A, and why
mjswan 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 3d 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 — 34 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Project
mjswan packages browser-based MuJoCo simulations with real-time policy control into an interactive static web app. It has two sides:
- Python (src/mjswan/):
Builder/Project/SceneAPI that bundles models, policies, and UI config into a static site. - Frontend template (src/mjswan/template/): TypeScript + three.js + mujoco-wasm client that the Python build step bundles.
See CONTEXT.md for a full codebase map, object model, module descriptions, and tooling reference.
Philosophy
- Write clean, readable, maintainable code.
- Don't reinvent what already exists upstream. Prefer mjlab (GitHub, local) or other dependencies over new boilerplate in mjswan.
- Keep comments minimal and concise. Only comment the non-obvious why, not the what. When touching existing comments, strip anything redundant or self-evident.
- Write in English everywhere: code, comments, docs, commit messages, PRs.
- No em dashes. Use a comma, a colon, or parentheses.
Layout
- src/mjswan/: package source, with the object model at the root (
Builder, the*Handle/*Configpairs,cli.py) over one package per layer (build/,compile/,mjlab/,source/,document/,cloud/,license/,rig/, and the mjlab-mirrormanagers//envs/mdp/). docs/adr/0008 gives the rules: imports point downward, mjswan's own names are singular, a file never repeats its package's name. - src/mjswan/template/: frontend source (Vite + React + three.js + mujoco-wasm).
- examples/: runnable examples,
demoandcolab. Python only: assets are fetched at run time rather than committed. - tests/: pytest suite.
slow-marked tests are opt-out (see below). - docs/: zensical (MkDocs-based) site published to Read the Docs. Build with
make docs-build; serve locally withmake docs-serve.
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.
- 3d ago Changed · +4 tokens per session 6167f909a4a0
- 1mo ago Changed · +3 lines · +151 tokens per session f1b203233745
- 1mo ago First seen · 31 lines · 464 tokens per session scan A f4ca2992af66
mjswan AGENTS.md is an instructions file published in the GitHub repository ttktjmt/mjswan (362 stars, last pushed today), licensed Apache-2.0. It adds 619 tokens to every session, about $0.0025 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.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
vscode model-prompts.instructions.md
Model-specific prompt authoring and registry guidelines.