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leanspec: Instructions file for Claude Code

CLAUDE.md

leanspec CLAUDE.md is an instructions file for Claude Code from codervisor/leanspec. It costs 776 tokens per session, scanned A, original, MIT.

A shared CLAUDE.md instruction file describing several software repositories, their purposes, tools, and coding rules. It gives AI coding agents background and project-specific working guidance.

In plain words
What is it for?
Guiding changes across Rust, TypeScript, and Lean projects, including formatting, testing, dependencies, commits, and pull requests.
Why use it?
It reduces the need to explain the repository structure and standards during every coding task.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is codervisor/leanspec's own configuration. It tells Claude Code how to work on leanspec itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything leanspec configures →

not rated 300repo 5mo ago A scan 776 tokens original MIT
View source ↗ codervisor/leanspec lean-spec.dev
Reuse

Borrowing it

Nothing to install: this file belongs to codervisor/leanspec. 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/codervisor/leanspec/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/codervisor/leanspec

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.

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README.md
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Your own site
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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.

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<a href="https://agentmods.dev/instructions/codervisor/leanspec/claude-md"><img src="https://agentmods.dev/badge/instructions/codervisor/leanspec/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 776 This file is loaded in full into every session.
When invoked 776 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00776 $0.00776
Opus 5.5 $0.00310 $0.00310
Sonnet 5.5 $0.00155 $0.00155
Haiku 4.5 $0.00078 $0.00078

Measured 2mo ago against content hash 7b3d170ff387, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

leanspec 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.

CLAUDE.md · 88 lines

How it starts

The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — codervisor project standards

This file defines shared conventions enforced across all codervisor repositories. It is synced from the codervisor meta-repo into each child project.

Repository overview

codervisor is a suite of AI-agent infrastructure projects:

Repo Stack Purpose
stiglab Rust + TypeScript Distributed AI agent session orchestration
synodic TypeScript AI harness governance framework
telegramable TypeScript Telegram-first AI agent proxy
ising Rust Code graph analysis engine
skills TOML / Markdown Shared Claude Code skills
lean-spec Lean 4 Formal specification framework

Coding conventions

General

  • Write clear, self-documenting code. Add comments only where intent is non-obvious.
  • Prefer small, focused commits with descriptive messages (imperative mood, <72 chars).
  • Every PR must pass CI before merge. No force-pushing to main.
  • Keep dependencies minimal. Justify new crates / packages in the PR description.

Rust repos (stiglab, ising)

  • Edition: 2021 or later.
  • Format with rustfmt (default config unless rustfmt.toml is present).
  • Lint with clippy — treat warnings as errors in CI (-D warnings).
  • Use thiserror for library errors, anyhow for binary/application errors.
  • Prefer #[must_use] on functions returning values that should not be silently dropped.
  • Tests live next to the code in #[cfg(test)] modules; integration tests in tests/.

TypeScript repos (synodic, telegramable)

  • Target: ES2022+ / Node 20+.
  • Strict mode: "strict": true in tsconfig.json.
  • Lint with Biome (preferred) or ESLint. Format with Biome or Prettier.
  • Use named exports. Avoid default exports except for framework conventions.
  • Prefer async/await over raw Promises. Avoid .then() chains.
  • Tests use Vitest (preferred) or Jest. Co-locate test files as *.test.ts.

Lean repos (lean-spec)

Read the full file on GitHub · 88 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.

  1. 2mo ago First seen · 88 lines · 776 tokens per session scan A 7b3d170ff387

Subscribe to this mod's changes

leanspec CLAUDE.md is an instructions file published in the GitHub repository codervisor/leanspec (300 stars, last pushed 5mo ago), licensed MIT. It adds 776 tokens to every session, about $0.0031 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.

Project ManagementWriting and docsaiai-agentsdevelopmentspecspec-driven-development
Related

leanspec CLAUDE.md compared with instructions from other repositories

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