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claudeleaf: Instructions file for Claude Code

CLAUDE.md

claudeleaf CLAUDE.md is an instructions file for Claude Code from lonetis/claudeleaf. It costs 5,741 tokens per session, scanned A, original, MIT.

Project instructions for Claudeleaf, a tool that lets an AI agent edit Overleaf projects, which are online collaborative LaTeX documents, in real time.

In plain words
What is it for?
Use them when developing or maintaining Claudeleaf's TypeScript SDK, command-line interface, or MCP server for editing Overleaf projects.
Why use it?
They explain the project's structure, technology, and data flow so contributors can change it consistently.

Instructions file for Claude Code

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

This is lonetis/claudeleaf's own configuration. It tells Claude Code how to work on claudeleaf 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 claudeleaf configures →

not rated 36repo +2 changed 8d ago A scan 5,741 tokens original MIT
View source ↗ lonetis/claudeleaf npmjs.com
Reuse

Borrowing it

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

Made for: Claude Code.

Wrote this? Show the measurements

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Per session 5,741 This file is loaded in full into every session.
When invoked 5,741 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 $0.05741 $0.05741
Opus 5.5 $0.02296 $0.02296
Sonnet 5.5 $0.01148 $0.01148
Haiku 4.5 $0.00574 $0.00574

Measured 8d ago against content hash a686aaf485e5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

claudeleaf 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 · 332 lines

How it starts

The opening of the file, as written. The whole thing — 332 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

Internal documentation for Claudeleaf — the single source of truth for how the project works. (User-facing docs live in README.md.)

What this is

Claudeleaf bridges an Overleaf account to an API so Claude — or any agent/tool — can edit any of the account's projects programmatically through Overleaf's live web-editing channel (not git). Edits appear to collaborators in real time, attributed to the signed-in user. One instance is account-scoped: it lists every accessible project and edits any of them (by id or name); each project is backed by its own realtime connection.

TypeScript / Node, delivered as three layers over one core:

  • a TypeScript SDK (OverleafClient, account-scoped; ProjectSession, per-project),
  • a CLI (claudeleaf) — thin command wrapper,
  • an MCP server — thin tool wrapper, for Claude Code.

Tech stack

  • Node.js 20+, TypeScript (ESM, NodeNext), built with tsc to dist/. npm for tooling.
  • ws — the realtime WebSocket transport.
  • global fetch (Node) — the Socket.IO handshake and the REST tree/projects endpoints.
  • playwright-core — drives the user's installed Chrome/Edge for the one-time manual login (no browser download). Loaded lazily (dynamic import in auth.browserLogin) so the SDK/CLI/MCP stay lightweight — important for npx.
  • @modelcontextprotocol/sdk + zod — the MCP server.
  • vitest — unit + live integration tests. tsx — run TS directly (dev / MCP launch).

Project structure (src/, flat)

src/
  index.ts        public API: OverleafClient, ProjectSession, Config, Document, errors
  config.ts       account-level Config (no project/credentials); env parsing
  errors.ts       error hierarchy (ClaudeleafError + subclasses)
  util.ts         async helpers: Mutex, Deferred, sleep, withTimeout
  protocol.ts     Socket.IO 0.9 frame encode/decode (pure)
  ot.ts           ShareJS ops, offset<->rowcol, diff, wire encoding, git-blob hash (pure)
  logParser.ts    parse pdfTeX/LaTeX output.log into errors/warnings/bad-boxes (pure)
  document.ts     Document: local mirror of one open doc (text + version + generation)
  types.ts        shared types (Entity, ProjectSummary, ProjectInfo, CompileResult, ...)
  realtime.ts     RealtimeConnection(projectId): WS transport, acks, heartbeat, reconnect
  auth.ts         SessionManager: manual browser login + session cookie cache
  rest.ts         listProjects() + RestClient(projectId) for tree CRUD + compile/output
  session.ts      ProjectSession: one project's realtime connection, tree, edits, compile
  client.ts       OverleafClient: account-scoped; listProjects + per-project delegation
  cli.ts          CLI (login, doctor, projects, doc ops, comments, compile, mcp); the bin
  mcpServer.ts    MCP server exposing the SDK as tools (each takes a project)
test/             vitest unit (no network) + integration/mcp e2e (live, auto-skip)

Read the full file on GitHub · 332 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. 8d ago Changed · +62 lines · +1,278 tokens per session a686aaf485e5
  2. 1mo ago First seen · 270 lines · 4,463 tokens per session scan A e943f8d231d9

Subscribe to this mod's changes

claudeleaf CLAUDE.md is an instructions file published in the GitHub repository lonetis/claudeleaf (36 stars, last pushed 8d ago), licensed MIT. It adds 5,741 tokens to every session, about $0.0230 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.

Claude CodeDocumentsclaudemcpoverleaf
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