skill preflight
Lint your SKILL.md for the security and quality issues marketplace reviewers reject — before you submit.
Free
Works with the AI tools you already use
Claude Code
Cursor
Codex CLI
GitHub Copilot
Gemini CLI+20 moreClaude CodeCursorCodex CLIGitHub CopilotGemini CLI
OpenClaw
Manus
Grok+17 agentsskill preflight
Example session with this skill installed
Run a preflight check on my new web-scraper skill directory. I want to make sure I didn't leave any API keys in the scripts and that the SKILL.md is valid.
- Read your context and instructions
- Compiled the preflight
Preflight Report
❌ FAIL: Secrets found in scraper.py:42 (Hardcoded API Key).
⚠️ WARN: Undisclosed network call to api.scrapinghub.com in client.ts. Disclose this host in SKILL.md.
✅ PASS: SKILL.md frontmatter is valid.
Fix the key in scraper.py before submitting.
Connects securely to your tools. The creator never sees your data.
About this skill
skill-preflight runs the reviewer's checks on your machine so you pass review the first time instead of losing a 24-48h round-trip to a rejection.
It scans your SKILL.md package against the 8-point security rubric marketplaces reject on — hardcoded secrets, outbound data leaks, dangerous commands, obfuscated payloads, credential access, privilege escalation, injected-instruction phrasing, and undisclosed network calls — and adds the listing-quality checks that trigger soft rejections (missing frontmatter, weak description, no "use when..." trigger).
You get a pass/fail report with the exact file:line and a fix for every finding. FAIL = a hard reject reason; WARN = a likely flag or quality gap; PASS = clean.
Fully offline and static: it never executes your skill's code, never makes a network request, and never reads anything outside the path you give it. Works with any SKILL.md-compatible agent (Claude Code, Codex CLI, Cursor, Copilot, Gemini CLI). Requires Python 3.8+.
Run: python3 scripts/preflight.py <your-skill-dir>
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
Free skills download straight away. Paid skills unlock right after purchase.
- 2
Unzip into your skills folder
Every agent reads skills from one folder on your machine. Drop the unzipped folder in there.
- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
Skills folder by agent
Click the path to copy it. Create the folder if it does not exist yet.
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