skillcheck-free
SkillCheck Free validates Claude Code SKILL.md files against ~25 contract rules covering structure, naming, semantic consistency, and quality patterns. It catches missing…
Plugin bundle · by olgasafonova
About
skillcheck-free is a plugin bundle for AI coding tools published by olgasafonova. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). We first saw it on 2026-10-12 and have recorded no change since. As of our marketplace pass on 2026-10-12.
SkillCheck Free validates Claude Code SKILL.md files against ~25 contract rules covering structure, naming, semantic consistency, and quality patterns. It catches missing frontmatter, weak or ambiguous descriptions, trigger collisions, anti-pattern formatting (prose where tables belong), naming smells, and contradictions before users encounter them. Runs locally — it's itself a SKILL.md the agent reads, with no API calls, binaries, or external services. MIT-licensed. Works in Claude Code, Claude Desktop/Web (Projects), and Cursor. The Free tier covers structural, semantic, and naming checks plus quality-pattern recognition. SkillCheck Pro (separate product at getskillcheck.com) adds anti-slop detection, security scanning, token budget analysis, WCAG accessibility, and enterprise readiness checks.
What it asks for
- Installs as a plugin bundle
None of the marketplaces we read publishes its tools or the settings it asks for.
What it declares, asks for and runs, in full
Only install plugins from developers you trust. We list what marketplaces publish and do not test plugins.
Works with
- Claude Code
From the marketplaces that list it and the MCP transport it declares, as each client documents them. We do not test plugins.
Connect
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Where it is published
| Marketplace | Status | Version | Figures | Verified | First seen |
|---|---|---|---|---|---|
| Claude Code: claude-plugins-community (Open the source on GitHub) | Listed | 3.20.1 | Forks (GitHub): 2 Stars (GitHub): 41 |
Not marked |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
What the bundle contains
As published on Claude Code: claude-plugins-community.
Skills: 1
skill-check
What changed
Nothing has moved on this plugin since we started watching it.
Similar plugins
Products whose own names, descriptions, tools and skills are closest in meaning to this one, on every marketplace we read. Closeness is ranked within this list only.
-
Health checker for Claude Code skills and commands. Scans ~/.claude/skills/ and commands/ for broken file references, deprecated MCP tool usage, missing frontmatter, script syntax…
-
Lint and diagnose Claude Code SKILL.md files against Anthropic's 8 best-practice rules. Scans frontmatter, description quality, file size, gotchas, allowed-tools, structure…
-
Lint a SKILL.md for frontmatter, structure, secrets and size. All 6 tools free.
-
Complete CTO & Staff Engineer toolkit: 24 skills covering code review, architecture, DevOps, security, testing, and engineering management
-
Audits, diagnoses, and upgrades your Claude Code skills and agents
-
A "ToolSearch for skills" — searches your SKILL.md files by keyword, exact name, or required-term filter so the model can fetch full skill descriptions on demand. Mirrors Claude…
-
23 reusable skills, 2 agents, and smart hooks for any project. Covers the full development cycle: architecture mapping, implementation planning, code review, safe refactoring…
-
A complete toolkit for creating, validating, and iterating on Claude Code skills and plugins. Includes scaffolding scripts, validation tools, and best-practice reference guides…
-
Transform 17 source types into AI-ready skills and RAG knowledge. Ingest documentation sites, GitHub repos, PDFs, Jupyter notebooks, videos, Word docs, EPUBs, OpenAPI specs…
-
claude-project-context-manager
A skill and agent plugin that reads your project's architecture documentation — README.md, architecture.md, and related files — and enforces those documented conventions on every…
Similar plugins by marketplace
The same question asked of one marketplace at a time: is there an analog of this plugin there?
Has a listing on Claude Code: claude-plugins-community (5)
-
Health checker for Claude Code skills and commands. Scans ~/.claude/skills/ and commands/ for broken file references, deprecated MCP tool usage, missing frontmatter, script syntax…
-
Lint and diagnose Claude Code SKILL.md files against Anthropic's 8 best-practice rules. Scans frontmatter, description quality, file size, gotchas, allowed-tools, structure…
-
Complete CTO & Staff Engineer toolkit: 24 skills covering code review, architecture, DevOps, security, testing, and engineering management
-
Audits, diagnoses, and upgrades your Claude Code skills and agents
-
A "ToolSearch for skills" — searches your SKILL.md files by keyword, exact name, or required-term filter so the model can fetch full skill descriptions on demand. Mirrors Claude…
Has a listing on Claude Code: claude-plugins-official (5)
-
Create new skills, improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, update or optimize an existing skill, run evals to…
-
Bring Qodo's codebase intelligence, coding standards, and code review into your coding agent.
-
Your code review partner. CodeRabbit provides external validation using a specialized AI architecture and 40+ integrated static analyzers—offering a different perspective that…
-
Analyze codebases and recommend tailored Claude Code automations such as hooks, skills, MCP servers, and subagents.
-
Comprehensive PR review agents specializing in comments, tests, error handling, type design, code quality, and code simplification
Has a listing on Claude: knowledge-work-plugins (5)
-
Bring Qodo's codebase intelligence, coding standards, and code review into your coding agent.
-
Official Buildkite skills for Claude Code, Cursor, and other AI coding agents — pipelines, migration, preflight, agent runtime, CLI, and API
-
Security review for Claude-generated code. Pattern-based warnings on edits, LLM-powered diff review on Stop, and an agentic commit reviewer that catches injection, XSS, SSRF…
-
Streamline engineering workflows — standups, code review, architecture decisions, incident response, and technical documentation. Works with your existing tools or standalone.
-
AI-first project auditor and re-engineer based on the 9 design principles and 7 design patterns from the TechWolf AI-First Bootcamp
Has a listing on Codex: openai-curated (openai/plugins) (5)
-
Evaluate Codex skills and plugins from chat with a beginner-friendly start command, local-first reports, token budget explanations, and guided benchmarking.
-
AI-powered code review in Codex, powered by CodeRabbit.
-
An agentic skills framework & software development methodology that works: planning, TDD, debugging, and collaboration workflows.
-
Qodo setup, code intelligence, and review workflows.
-
Inspect repositories, triage pull requests and issues, debug CI, and publish changes through a hybrid GitHub connector and CLI workflow.
Has a listing on Community GitHub marketplaces (5)
-
Endor Labs workflow agents and setup for Claude Code.
-
Aikido Security scanning for Claude Code — SAST, secrets, and IaC vulnerability detection powered by the Aikido MCP server.
-
Sourcery security findings for AI coding agents: triage and minimal-change remediation via the public Sourcery API (12 MCP tools + skills).
-
Official Buildkite skills for Claude Code, Cursor, and other AI coding agents — pipelines, migration, preflight, agent runtime, CLI, and API
-
Appwrite tools for Claude Code, including SDK skills, Appwrite MCP servers, and deployment commands.
Has a listing on Copilot CLI: github/awesome-copilot (5)
-
Design, build, review, and publish GitHub Skills-style exercises with one coordinating agent and five Agent Skills for learner journeys, workflow-backed validation, and release…
-
Goal-driven task orchestration with independent verification. Interviews the user to define a clear goal, then loops between a Builder subagent (does the work) and an Inspector…
-
Analyze any repository and generate AI-ready configuration — AGENTS.md, copilot-instructions.md, CI workflows, issue templates, and more. Mines your PR review patterns and creates…
-
Helps GitHub Copilot investigate mobile app telemetry, diagnose crashes, manage [bitdrift](bitdrift.ai) workflows and dashboards, integrate the Capture SDK into iOS, Android, and…
-
Meta prompts that help you discover and generate curated GitHub Copilot agents, instructions, prompts, and skills.
Has a listing on Copilot CLI: github/copilot-plugins (5)
-
Advanced Security plugin for GitHub Copilot.
-
Toolkit for building Microsoft 365 Copilot declarative agents — scaffolding, JSON manifest development, and capability configuration.
-
Bring Azure DevOps work-item, repository, and pull-request workflows into GitHub Copilot.
-
Complete bundle: all Microsoft Skills for Fabric for developers and consumers.
-
workiq-productivity
WorkIQ productivity skills powered by the local WorkIQ CLI — read-only insights across email, meetings, calendar, Teams, SharePoint, projects, and people.
Has a listing on Cursor: cursor/plugins (5)
-
if you want to go fast, go deep first. pstack helps you write less, but higher quality code. rigorous agent workflows you can parallelize with confidence.
-
CLI-backed repo compatibility scans plus agents that audit startup, validation, and docs against reality.
-
Skills for building on the Cursor Origin API. Fetch the live spec first, then follow the Origin rules for credentials, scopes, webhooks, paging, and errors. Includes a skill that…
-
Consult a stronger model before major decisions, when stuck, and before declaring done.
-
Build apps, scripts, and automations with the TypeScript SDK.
Has a listing on Docker MCP Catalog (5)
-
Stop stitching context for Copilot and Cursor. With Sequa MCP, your AI tools know your entire codebase and docs out of the box.
-
MCP server for terminal commands, file operations, and process management
-
MCP server for using Semgrep to scan code for security vulnerabilities.
-
Ref powerful search tool connets your coding tools with documentation context. It includes an up-to-date index of public documentation and it can ingest your private documentation…
-
Bridges multiple AI models and CLIs, enabling orchestrated workflows across Claude Code, Gemini CLI, Codex CLI, and other AI development tools.
Has a listing on Official MCP Registry (5)
-
Lint a SKILL.md for frontmatter, structure, secrets and size. All 6 tools free.
-
Toolbox for AI agent skills: scaffold, lint, pack, install, and serve SKILL.md skills
-
Sigistry Plugin & Skill Catalog
Search verified Claude Code plugins and skills; fetch portable SKILL.md sources. Read-only.
-
pm-claude-skills io.github.mohitagw15856/pm-claude-skills
1285 professional Agent Skills + workflow recipes — searchable & fetchable over MCP.
-
Agent-first skill marketplace with USK open standard for Claude, Cursor, Gemini, Codex CLI.
Found by meaning, not by shared code or a shared repository: similar plugins stay separate products, and this is not a review or a recommendation.
Is this your plugin?
Add it to your projects and prove you maintain it with a file in its repository, a file on your domain or a DNS record. You get alerts when a marketplace lists it, drops it, changes its verified mark or what it asks for, and its remote endpoint goes on monitoring as a web service.
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.