What is rigor CLAUDE.md?

Project instructions for Claude Code in Rigor, a Ruby static-analysis tool. They explain which instruction and skill directories apply, how parallel agents should work, and which safety rules they must follow.

Use them when making or reviewing Rigor changes, especially in parallel worktrees, subagents, or skill-authoring tasks.

They prevent agents from loading the wrong workflows, sharing unsafe state, or running expensive checks concurrently on the same project.

How rigortype/rigor configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to rigortype/rigor. 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/rigortype/rigor/master/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/rigortype/rigor

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/rigortype/rigor/claude-md/github.svg)](https://agentmods.dev/instructions/rigortype/rigor/claude-md)

Your own site

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

Per session 426 This file is loaded in full into every session.

When invoked 426 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	$0.00426	$0.00426
Opus 5.5	$0.00170	$0.00170
Sonnet 5.5	$0.00085	$0.00085
Haiku 4.5	$0.00043	$0.00043

Measured 11d ago against content hash e5800a5c787c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rigor 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 11d 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 · 23 lines

What it actually says

@AGENTS.md

Claude Code

Two skill trees, and only one of them is yours. .claude/skills/ is auto-discovered in this session — contributor workflows that assume this monorepo's Makefile and layout. skills/ is the user-facing set Rigor ships to projects adopting it; it is not loaded here, references only the public rigor CLI, and several names appear in both trees (rigor-plugin-author). Each SKILL.md's description: is what routes to it, so keep no catalogue here. Authoring either: docs/agents/skill-authoring.md.
A subagent does not inherit this contract. The Flake mandate, the references/ read-only rule, no local full gates, and the release gate bind it too — put them in the prompt (a lane brief carries the floor in parallel-lanes.md step 5 and loads the rigor-lane skill), or it will run bundle on the host and make verify alongside every other session. Subagent batch, lane or reviewer brief: docs/agents/parallel-lanes.md.
Auto memory is clone-wide, not worktree-scoped. It keys off the git repository, so a parallel session in a sibling worktree of this clone reads and writes the same MEMORY.md — a save here is visible, and racing, there too.

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.

11d ago First seen · 23 lines · 426 tokens per session scan A e5800a5c787c

Subscribe to this mod's changes

rigor CLAUDE.md is an instructions file published in the GitHub repository rigortype/rigor (107 stars, last pushed today), licensed MPL-2.0. It adds 426 tokens to every session, about $0.0017 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 2026-10-26.

Writing and docs

rigor CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
rigor CLAUDE.mdrigortype/rigor	Instructions file	107	today	MPL-2.0	A	426	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

rigor: Instructions file for Claude Code