dvcrn SafeHub
SafeHub is a security scanner for OpenClaw skills. It runs static analysis (Semgrep) and optional sandbox execution (Docker) on any skill—by name, local path, or GitHub URL—and returns a trust score and a clear recommendation: safe to install, install with caution, or not safe.
Requirements
These binaries must be on your PATH (declared in registry metadata):
- Node.js (18+) — required to run the CLI.
- Semgrep — required for the scan command (static analysis). Install with
brew install semgrepornpm install -g semgrep. - git — required when the scan target is a GitHub URL (used to clone the repo).
Optional:
- Docker — used for sandbox execution. If Docker is not available, use
--no-sandboxfor static-only scanning.
Environment variables
All of these are optional. No secrets or API tokens are required by default.
| Variable | Default | Effect |
|---|---|---|
| SAFEHUB_RULES_REPO | safehub/safehub |
GitHub repo (owner/repo) used by safehub update to fetch and overwrite local rule files in ./rules. Setting this to another repo makes the updater pull rules from that repo — use only repos you trust. |
| SAFEHUB_RULES_BRANCH | main |
Branch name used when fetching rules (with SAFEHUB_RULES_REPO). |
| SAFEHUB_DATA_DIR | ~/.safehub |
Directory for cached scan reports (e.g. ~/.safehub/reports). |
| SAFEHUB_SANDBOX_IMAGE | node:18-alpine |
Docker image used for the sandbox when scanning. |
| SAFEHUB_SANDBOX_TIMEOUT_MS | 30000 |
Timeout (ms) for the sandbox run before the container is killed. |
| SAFEHUB_NO_TYPING | (unset) | Set to 1 to disable the typing-effect output (e.g. in CI or pipes). |
Important: SAFEHUB_RULES_REPO controls where safehub update downloads rules from and overwrites local ./rules; only point it at a repo you trust.
Commands
All commands are run via the safehub CLI (e.g. safehub scan <target> or node index.js scan <target> from the skill directory).
scan
Scan a skill by ClawHub name, local path, or GitHub URL.
Examples:
safehub scan web-scraper
safehub scan ./my-local-skill
safehub scan https://github.com/user/their-skill
safehub scan https://github.com/BenedictKing/tavily-web --no-sandbox
Options:
--no-sandbox— Skip Docker sandbox; run static analysis only (use when Docker is not installed).
report
Show the last scan report for a skill without rescanning.
Examples:
safehub report web-scraper
safehub report risky-skill
update
Pull the latest Semgrep scanner rules from the SafeHub GitHub repo (or your fork via SAFEHUB_RULES_REPO).
Examples:
safehub update
SAFEHUB_RULES_REPO=owner/repo safehub update
Example output
After running safehub scan <target>, you’ll see:
- Static analysis — Findings from Semgrep (network, filesystem, eval/exec, env, obfuscation).
- Sandbox behavior — Whether the skill attempted network access or suspicious actions (when Docker is used).
- Trust score (0–100) and recommendation: SAFE TO INSTALL, INSTALL WITH CAUTION, or NOT SAFE TO INSTALL.
Installation (users)
Install from ClawHub:
clawhub install safehub
Or install the CLI globally from npm:
npm install -g safehub
Then run safehub scan <target> (if the CLI is on PATH) or node index.js scan <target> from the skill directory.