OpenEnv is a framework for creating, deploying, and using isolated execution environments through simple APIs modeled on Gymnasium. It is intended for researchers and developers training agents with reinforcement learning, as well as creators who need secure environments that can be deployed and accessed through familiar protocols. The catalogue add-ons provide agent integrations and workflows for using OpenEnv.
Borrowing it
Nothing to install: this file belongs to huggingface/OpenEnv. 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/OpenEnv/main/.claude/skills/update-docs/SKILL.mdgit clone --depth 1 https://github.com/huggingface/OpenEnvWrote 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/skills/huggingface/openenv/update-docs)<a href="https://agentmods.dev/skills/huggingface/openenv/update-docs"><img src="https://agentmods.dev/badge/skills/huggingface/openenv/update-docs/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/skills/huggingface/openenv/update-docs"><img src="https://agentmods.dev/badge/skills/huggingface/openenv/update-docs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00028 | $0.00660 |
| Opus 5.5 | $0.00011 | $0.00264 |
| Sonnet 5.5 | $0.00006 | $0.00132 |
| Haiku 4.5 | $0.00003 | $0.00066 |
Grade A, and why
update-docs 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 1mo 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 — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/update-docs
Find and fix stale documentation after API changes.
EXECUTE THESE STEPS NOW
When this skill is invoked, you MUST execute these steps immediately.
Step 1: Identify Changed Files
Run:
git diff --name-only main...HEAD -- '*.py'
If no changes are found relative to main (e.g., on main or no upstream), fall back to:
git diff --name-only HEAD~1 -- '*.py'
If that also fails, ask the user which files changed.
Collect the list of changed Python files.
Step 2: Extract API Changes
For each changed .py file, compare old vs new signatures using the same ref that worked in Step 1:
# If Step 1 used main...HEAD:
git diff main...HEAD -- <file>
# If Step 1 fell back to HEAD~1:
git diff HEAD~1 -- <file>
Look for changes to:
- Function/method signatures (def lines)
- Class names and init signatures
- Module-level constants and type aliases
- Removed or renamed public symbols
Build a list of (old_signature, new_signature) pairs.
If no API changes are found (only internal logic changes), report "No API changes detected — no docs update needed" and stop.
Step 3: Spawn Docs Updater Agent
Use the Task tool to spawn the docs-updater agent. IMPORTANT: the
description field MUST contain "docs-updater" so the SubagentStop
hook fires correctly.
Task tool:
subagent_type: general-purpose
description: "docs-updater propagation"
prompt: |
You are a docs-updater agent. Read .claude/agents/docs-updater.md
for your full instructions.
Here are the API changes to propagate:
Changed files: <list>
API changes:
- `old` → `new`
...
Search the entire repo for references to the old APIs and update
them to match the new signatures. Follow the process in
.claude/agents/docs-updater.md exactly.
Step 4: Review Results
After the agent returns:
- Review the update report
- Verify no test files were touched
- Verify changes are minimal and correct
Report the summary to the user.
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.
- 1mo ago First seen · 114 lines · 28 tokens per session scan A f256c73167e9
update-docs is a skill published in the GitHub repository huggingface/OpenEnv (2,739 stars, last pushed 8d ago), licensed BSD-3-Clause. It adds 28 tokens to every session and 660 once invoked, about $0.0001 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 2026-08-31.
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