Borrowing it
Nothing to install: this file belongs to ofux/lauren. 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/ofux/lauren/main/CLAUDE.mdgit clone --depth 1 https://github.com/ofux/laurenWrote 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/ofux/lauren/claude-md)<a href="https://agentmods.dev/instructions/ofux/lauren/claude-md"><img src="https://agentmods.dev/badge/instructions/ofux/lauren/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.
<a href="https://agentmods.dev/instructions/ofux/lauren/claude-md"><img src="https://agentmods.dev/badge/instructions/ofux/lauren/claude-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 | $0.03213 | $0.03213 |
| Opus 5.5 | $0.01285 | $0.01285 |
| Sonnet 5.5 | $0.00643 | $0.00643 |
| Haiku 4.5 | $0.00321 | $0.00321 |
Grade A, and why
lauren 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 2mo 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 — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Commands
npm run build # tsc → dist/, then chmod +x the lauren bin
npm run watch # tsc --watch
npm run clean # remove dist/
npm run check # biome check --write (lint + format + organize-imports)
npm run lint # biome lint only
npm run format # biome format --write
npm test # vitest run (one-shot)
npm run test:watch # vitest in watch mode
Tests live next to source as *.test.ts (Vitest, ESM, Node >=20). Verify changes by npm run build && npm run check && npm test. Manual smoke test: from a throwaway repo, run lauren vibe --dry-run to print the queue, and lauren --list to inspect state (plain table; omit --list for the interactive TUI).
External binaries
The runtime shells out to two CLIs that must be on $PATH:
claude— used interactively (planning, spec) and as the default agent for the implement / fix pipeline phases, brain JSON decisions, and merger conflict resolution.codex— used as the default agent for the review pipeline phase (codex exec review -o <file> <prompt>).
Per-phase agent selection is configurable in .lauren/config.json under
agents: each of implement, review, fix, merger, and brain
independently accepts "claude" or "codex". The adapters live in
src/agents/ and implement the CodingAgent port (runEdit, runReview,
runJson) — see src/agents/types.ts.
If a binary is missing for any role configured to use it, lauren vibe will
fail at the corresponding step.
Architecture
Lauren is a single-daemon system that drains a plan queue end-to-end without further human input.
lauren CLI (src/bin/lauren.ts) — the single public executable. lauren plan spawns interactive claude with PLAN_SYSTEM_PROMPT; that claude session writes .lauren/plans/<slug>.md and re-invokes the CLI as lauren _register <slug> --path ... --title ... (a hidden subcommand) to add a row with status enqueued to .lauren/plans.json. The default lauren (no subcommand) is an interactive Ink TUI (src/tui/TodoApp.tsx) showing the queue; --list (or non-TTY) prints a static colored table instead. Selecting a row dispatches to cancelPlan (src/cancel.ts) which routes by status (see Cancellation below). The TUI also supports two queue-level actions: t on a failed row resets it to ready via retryPlan (src/retry.ts), and r triggers a brain reorganize pass that re-thinks the whole ready queue (refused while lauren vibe is running, detected via .lauren/vibe.pid).
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.
- 2mo ago First seen · 113 lines · 3,213 tokens per session scan A c4fd5a934ba0
lauren CLAUDE.md is an instructions file published in the GitHub repository ofux/lauren (13 stars, last pushed 5mo ago), licensed MIT. It adds 3,213 tokens to every session, about $0.0129 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 2026-08-30.
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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.
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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).
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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).
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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.