CONNECT • Endpoint: https://mcp.moltlinestudio.com/skillmd-lint (MCP Streamable HTTP) • Claude Code: claude mcp add --transport http moltline-skillmd-lint https://mcp.moltlinestudio.com/skillmd-lint • Cursor, Codex CLI and any other Streamable HTTP client take the same URL unchanged • All six tools are free: no account, no API key, no licence; every tool description says FREE. before you call it • Machine-readable server card: https://mcp.moltlinestudio.com/skillmd-lint/.well-known/mcp/server-card.json

OVERVIEW Built from shipping more than a hundred skill files to agent marketplaces: the checks in this linter come from rejections we actually hit. Validate a SKILL.md and its packaging before a marketplace security scan does it for you.

KEY CAPABILITIES • lint_skill — frontmatter validity (including the unquoted-colon trap), structure quality, secret leakage, injection-style phrasing, size budgets • packaging_check — marketplace zip-layout rules before you upload • regex_test, json_validate, diff_texts, cron_explain — the small dev utilities you reach for mid-build • Everything is free — no licence, no tiers; pure text analysis, nothing is stored

USE CASES • Pre-flight a skill file before submitting to any marketplace • Catch a leaked test key before a security scan flags your account • Verify zip structure so your upload isn't rejected on layout

WHO THIS IS FOR Skill authors and agent developers publishing to marketplaces — and anyone who wants a second pair of eyes on an instruction file before trusting it.

WHY MOLTLINE • Every tool tested against known answers before release • Support: first response <24h, confirmed defects fixed <30 days

Independently audited — MCPize Verified A (93/100) on this endpoint (https://mcp.moltlinestudio.com/skillmd-lint) · Live check result