LeLab is a browser-based interface for LeRobot, a robotics library, that brings calibration, teleoperation, recording, training, inference, and replay into one web application. Robot users use it to operate an arm, collect camera-equipped datasets, train policies, and run those policies without relying on command-line workflows.
Borrowing it
Nothing to install: this file belongs to huggingface/leLab. 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/huggingface/leLab/main/CLAUDE.mdgit clone --depth 1 https://github.com/huggingface/leLabWrote 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/huggingface/lelab/claude-md)<a href="https://agentmods.dev/instructions/huggingface/lelab/claude-md"><img src="https://agentmods.dev/badge/instructions/huggingface/lelab/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/huggingface/lelab/claude-md"><img src="https://agentmods.dev/badge/instructions/huggingface/lelab/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 | $0.01896 | $0.01896 |
| Opus 5.5 | $0.00758 | $0.00758 |
| Sonnet 5.5 | $0.00379 | $0.00379 |
| Haiku 4.5 | $0.00190 | $0.00190 |
Grade A, and why
leLab CLAUDE.md scanned grade A with 1 finding 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 7d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
Run the Python tests with `pytest` (config in [pyproject.toml](pyproject.toml); install dev deps via `pip install -e ".[test]"`). Tests live in [tests/](tests/) and cover request schemas, pure helpers, and idle/mutex bra How it starts
The opening of the file, as written. The whole thing — 77 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.
Repository purpose
LeLab is a FastAPI + React web interface wrapping the LeRobot framework for the SO-101 leader/follower arm. It exposes teleoperation, dataset recording, calibration, replay, and training as HTTP/WebSocket endpoints, replacing LeRobot's CLI + keyboard-driven flows.
The frontend (React + Vite) lives in frontend/. The bundle in frontend/dist/ is not committed: setup.py builds it while building the wheel, with Node from the nodejs-wheel-binaries build requirement, and ships it as package data (frontend.__init__.py makes setuptools treat it as a package); lelab/server.py mounts it as StaticFiles at / so a single lelab process serves both API and UI on :8000. The frontend/ directory is also force-pushed to the LeLab HF Space by .github/workflows/sync_space.yml — that's a separate runtime; the Space builds the Dockerfile (which runs npm run build itself).
Common commands
Install (editable, requires Python ≥3.10):
pip install -e .
lerobot is pinned to a release tag on huggingface/lerobot (currently v0.6.1, see pyproject.toml) — installed from git rather than PyPI because the published wheels don't expose the lerobot-rollout script that lelab/rollout.py shells out to. Bump the tag when you want a newer upstream release; expect import-path drift (e.g. lerobot.configs.dataset, lerobot.utils.feature_utils, lerobot.common.control_utils) and adjust call sites accordingly.
Run servers (entry point defined in pyproject.toml):
lelab # uvicorn on :8000, serves built frontend at /, opens browser
lelab --dev # spawns Vite dev (:8080) + uvicorn --reload (:8000), opens browser to :8080
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.
- 7d ago Changed · +1 lines · +56 tokens per session e30091eccb86
- 29d ago Changed · -1 lines · +5 tokens per session e5d18e3a94dd
- 1mo ago Changed · +2 lines · +182 tokens per session 682d669fd4e9
- 1mo ago Changed · -3 tokens per session ec85f0144592
- 2mo ago First seen · 75 lines · 1,656 tokens per session scan A bedf4aa75216
leLab CLAUDE.md is an instructions file published in the GitHub repository huggingface/leLab (205 stars, last pushed yesterday), licensed Apache-2.0. It adds 1,896 tokens to every session, about $0.0076 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
leLab CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| leLab CLAUDE.mdhuggingface/leLab | Instructions file | 205 | yesterday | Apache-2.0 | A | 1,896 | 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 | yesterday | 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 |