Skills, MCP servers and plugins that work with OpenCode

An agent-harness optimization system covering skills, memory, security and research-first workflows for Claude Code and other agents.

A web scraping and crawling API (and open-source engine) that turns sites into LLM-ready data.

Design skill that generates a UI/UX design system (style, palette, typography, layout pattern) for a project; installs as a Claude Code plugin or via CLI.

A /graphify skill and CLI that maps a codebase, docs and PDFs into a queryable knowledge graph; code parsing runs locally via tree-sitter, per its README.

Engineering workflow skills for AI coding agents covering spec, plan, build, test, review and ship, with matching slash commands.

Persistent memory across sessions: captures what an agent does and compresses it for later reuse.

A large curated list of MCP servers.

Design skill for coding agents with commands such as polish, bolder, critique and audit to steer and review frontend UI; installs via npx for Claude Code, Cursor, Codex and others.

OpenHands: an open-source platform for AI-driven software development.

HeyGen's open-source framework that renders HTML, CSS and seekable animations to MP4 video, with agent skills and a Claude Code plugin.

Serves up-to-date library documentation to AI agents, including over MCP.

Agent skill that draws diagrams as one self-contained HTML + SVG file across 45 diagram types; also installs as a Claude Code or Codex plugin.

Local MCP server that indexes a codebase into a knowledge graph for code search, call tracing and architecture queries; written in C.

A multi-harness plugin marketplace for Claude Code, Codex, Cursor, OpenCode, GitHub Copilot and others.

Microsoft's Playwright MCP server, which lets agents drive a browser.

Curated list of Agent Skills from vendor engineering teams and the community, with install paths for Claude Code, Codex, Cursor and other clients.

Large library of agent skills, agents and commands for engineering, marketing, product and operations, packaged for Claude Code, Codex, Gemini CLI and more.

Agent skill that keeps task_plan.md, findings.md and progress.md on disk and re-injects the plan via hooks so it survives /clear and compaction.

Product-management skills and commands packaged as 9 Claude Code plugins, from discovery to launch and growth; per its README, also installs in Codex.

Every's Compound Engineering plugin for Claude Code, Codex, Cursor and more.

Trail-code (formerly graft): local code index and team-learnings layer that gives Claude Code, Cursor, Codex and other agents codebase context; optional Trail workspace.

An open-source coding agent (formerly sst/opencode).

A skills-based software development methodology for coding agents, installed as a plugin.

Agent skill that researches a topic across Reddit, X, YouTube, Hacker News, Polymarket, GitHub and the web from the last 30 days and summarizes it.

Local, browser-based review surface where you annotate coding-agent plans, specs and code diffs and send the feedback back to the agent via hooks.

Exa's MCP server for web search and crawling.

Claude Code plugin that runs several AI providers (Codex, Copilot, Ollama, Perplexity and others) on one task and flags where they disagree.

Open-source Kubernetes UI in one binary (topology, Helm, GitOps, traffic, audits) with a built-in MCP server that lets AI agents inspect clusters.

NVIDIA's security scanner for agent skills: static analysis plus optional LLM review for prompt injection, data exfiltration and other risks.

GitHub's official MCP server for working with repositories, issues and pull requests from an agent.

Apify's MCP server that connects agents to Apify Store scrapers and crawlers for web and social data extraction.

The open agent skills CLI (npx skills) for installing and managing skills across coding agents.

MCP server and Claude Code plugin that sandboxes tool output to save context and keeps session history in SQLite; source-available under Elastic License 2.0.

An MCP toolkit that gives agents semantic code retrieval and editing.

Hook that blocks destructive Git and file-system commands and access to secrets before a coding agent runs a tool call; per its README, it is not a sandbox.

Six agent skills for AI code review of architecture, tech debt and tests, with findings cited to classic engineering books; works as a Claude Code plugin or Codex skill.

A hand-picked collection of Claude Code resources: workflows, commands, tools and more.

A CLI for analyzing coding-agent token usage and cost from local logs.

Semantic memory for coding agents, kept as Markdown files with a Milvus index; plugins for Claude Code, Codex, OpenCode and others, plus a CLI and Python API.

Microsoft's local MCP server for Azure DevOps work items, repos, pipelines and wikis; the README recommends its hosted remote server.

Timescale's PostgreSQL docs search and best-practice skills for coding agents, offered as Agent Skills, a public MCP server and a Claude Code plugin.

Microsoft's agent plugin that bundles Azure skills with the Azure MCP Server and Foundry MCP, for GitHub Copilot, Claude Code and other hosts.

HashiCorp's Terraform MCP server for Terraform registry and workflow automation.

Claude Code plugin that sends the same question to several AI coding agents in parallel and summarizes where their answers agree and differ.

A curated list of Claude Skills, resources and tools for customizing Claude workflows.