What is mumei CLAUDE.md?

Project instructions for developing claude-lifecycle, a Claude Code plugin for lifecycle marketing workflows built from skills, agents, templates, and a knowledge base.

Developing the plugin, checking data quality before creating journeys, using its journey and copy templates, and following its English-language and repository conventions.

They define required checks and output templates, reducing the risk of creating unsupported marketing journeys or inconsistent documents.

How iroha924/mumei configures Claude Code

Reuse

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.

Copy the file

curl -O https://raw.githubusercontent.com/iroha924/mumei/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/iroha924/mumei

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/iroha924/mumei/claude-md/github.svg)](https://agentmods.dev/instructions/iroha924/mumei/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/iroha924/mumei/claude-md"><img src="https://agentmods.dev/badge/instructions/iroha924/mumei/claude-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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/iroha924/mumei/claude-md"><img src="https://agentmods.dev/badge/instructions/iroha924/mumei/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 2,389 This file is loaded in full into every session.

When invoked 2,389 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.02389	$0.02389
Opus 5	$0.01195	$0.01195
Sonnet 5	$0.00478	$0.00478
Haiku 4.5	$0.00239	$0.00239

Measured 8d ago against content hash c0f1a55cdc6f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

mumei CLAUDE.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 8d 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.

CLAUDE.md · 190 lines

How it starts

The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.

mumei Development Guide

This file instructs developers (and their Claude sessions) working on the mumei plugin itself. Plugin users should read README.md instead.

What mumei is

A Quality Enforcement Layer plugin for Claude Code. Implemented in bash + jq; hooks physically enforce phase transitions, Wave-scoped commits, and the review pipeline.

New features are driven through /mumei:compose, whose vehicle picker offers spec (full SDD workflow) or plan (official Claude plan mode wrapped with TaskCreate). Both vehicles share the same review pipeline and the single escape hatch (MUMEI_BYPASS=1).

Details: README.md.

Language policy

Everything tracked in git is written in English — plugin payload (agents/, skills/, hooks/, manifests, README, LICENSE), development assets (CLAUDE.md, .claude/ rules / skills / agents), CI, and all NEW additions to docs/ dev records. The pre-existing Japanese content in docs/harness-engineering.md and docs/loop-engineering.md stays as-is (translation was deliberately skipped); append new entries to those files in English.

README.ja.md and docs/getting-started.ja.md are intentional Japanese mirrors of their English counterparts — keep both sides in sync.

When in doubt: if git tracks it, write English.

bash + jq conventions (essentials)

Details: .claude/rules/bash-conventions.md (auto-loaded for hooks/**/*.sh).

set -u on; set -e deliberately NOT used (per-call-site error handling).
Function prefix mumei_ (public) / _mumei_ (private).
${CLAUDE_PLUGIN_ROOT:-} always with the :- fallback.
BSD awk compatible: the 3-arg match($0, /.../, arr) is gawk-only — forbidden.
Null-safe jq via // empty.
Escape hatch: check MUMEI_BYPASS=1 first and exit 0 immediately.

schemas/ conventions (essentials)

schemas/*.json are hand-written canonical contracts (state / review / cost-log / config / plugin / reliability-log). Hooks never read them at runtime; producing functions reference them in comments only.
Excluded from the plugin tarball via .gitattributes export-ignore.
When an on-disk shape changes, edit the JSON directly.

Read the full file on GitHub · 190 lines

Changes

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.

8d ago First seen · 190 lines · 2,389 tokens per session scan A c0f1a55cdc6f

Subscribe to this mod's changes

mumei CLAUDE.md is an instructions file published in the GitHub repository iroha924/mumei (2 stars, last pushed 2d ago), licensed MIT. It adds 2,389 tokens to every session, about $0.0119 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 2026-08-31.

Claude Code claude-code-plugin harness harness-engineering hooks quality-enforcement

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