Borrowing it
Nothing to install: this file belongs to iroha924/mumei. 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/iroha924/mumei/main/AGENTS.mdgit clone --depth 1 https://github.com/iroha924/mumeiWrote 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/iroha924/mumei/agents-md)<a href="https://agentmods.dev/instructions/iroha924/mumei/agents-md"><img src="https://agentmods.dev/badge/instructions/iroha924/mumei/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/iroha924/mumei/agents-md"><img src="https://agentmods.dev/badge/instructions/iroha924/mumei/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 | $0.04858 | $0.04858 |
| Opus 5.5 | $0.01943 | $0.01943 |
| Sonnet 5.5 | $0.00972 | $0.00972 |
| Haiku 4.5 | $0.00486 | $0.00486 |
Grade A, and why
mumei 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 1mo 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 — 392 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent reviewer guidance
This file follows the AGENTS.md open standard and is read automatically by AI coding / review agents that respect it (OpenAI Codex, Anthropic Claude, Gemini CLI, Cursor, Aider, and others). It supplies project-specific context so the reviewer flags the right things and stays away from the wrong things.
The canonical convention sources are .claude/rules/*.md (auto-loaded
by Claude Code) and CLAUDE.md; CONTRIBUTING.md carries the same
conventions for human contributors. This file is the thin mirror for
agents that read the AGENTS.md standard instead — it keeps the
load-bearing summary inline and links to the canonical files for depth.
What mumei is
mumei is a Claude Code plugin: a quality enforcement layer that
enforces SDD phases, Wave-by-Wave commits, and review pipelines via
hook-level gates rather than prompt-level instructions. It ships as
a git archive tarball; runtime is bash + jq so the install
footprint is zero (no Python venv, no Node runtime).
Repository layout:
- Plugin payload (shipped to users):
.claude-plugin/,agents/,skills/,hooks/(handlers and_lib/),scripts/(lint + aggregate),tests/(bats), top-levelREADME*.md/LICENSE/CONTRIBUTING.md/SECURITY.md/PRIVACY.md/CODE_OF_CONDUCT.md/AGENTS.md. - Shared dev-time only (NOT shipped):
schemas/*.jsonare hand-authored canonical contracts for the on-disk JSON the bash hooks write. Excluded from the plugin tarball (schemas/ export-ignorein.gitattributes); the hooks reference them by comment, never at runtime. - Dev-side, tracked (NOT shipped):
CLAUDE.md(project instructions, English),.claude/rules|skills|agents/(English),docs/dev records (harness-engineering.md,loop-engineering.md— pre-existing Japanese content, new entries in English). Design rationale goes in the PR description that lands the change; there is no separate decision log. - Gitignored (per-developer runtime state):
.claude/settings.local.json,.claude/agent-memory*/,.claude/worktrees/,.claude/tdd-guard/,CLAUDE.local.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.
- 1mo ago First seen · 392 lines · 4,858 tokens per session scan A ff6db8331bd7
mumei AGENTS.md is an instructions file published in the GitHub repository iroha924/mumei (2 stars, last pushed 1mo ago), licensed MIT. It adds 4,858 tokens to every session, about $0.0194 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 2026-08-31.
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.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.
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).