Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/nicknisi/claude-plugins/claude-mdgit clone --depth 1 https://github.com/nicknisi/claude-pluginsWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00552 | $0.00552 |
| Opus 5 | $0.00276 | $0.00276 |
| Sonnet 5 | $0.00110 | $0.00110 |
| Haiku 4.5 | $0.00055 | $0.00055 |
Grade A, and why
claude-plugins CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Code Plugin Marketplace
Personal collection of Claude Code plugins. For plugin and marketplace documentation, see:
Quick Start
# Install dependencies
pnpm install
# Bundle plugin scripts, then regenerate marketplace.json + the README list
pnpm run build && pnpm run sync
Plugin Structure
plugins/{name}/
├── .claude-plugin/
│ └── plugin.json # Required metadata
├── .mcp.json # Optional: MCP server config
├── agents/*.md # Optional: agent definitions
├── skills/*/SKILL.md # Optional: skills
├── commands/*.md # Optional: slash commands
└── mcp-server/ # Optional: custom MCP server
└── dist/ # Bundled output
Adding a Plugin
-
Create plugin directory:
mkdir -p plugins/my-plugin/.claude-plugin -
Create
plugin.json:{ "name": "my-plugin", "version": "0.1.0", "description": "Plugin description", "author": { "name": "Nick Nisi", "email": "[email protected]" }, "keywords": ["optional", "search", "terms"] } -
Add components (agents, skills, commands, or MCP servers)
-
Sync marketplace:
pnpm run sync
The sync script auto-discovers plugins and generates marketplace.json.
- Make sure to update the README for that plugin.
MCP Servers
Custom MCP Server
Use ${CLAUDE_PLUGIN_ROOT} for paths:
{
"mcpServers": {
"my-server": {
"command": "node",
"args": ["${CLAUDE_PLUGIN_ROOT}/mcp-server/dist/index.js"],
"env": {
"API_KEY": "${API_KEY}"
}
}
}
}
Build: pnpm run build (bundles to dist/)
External MCP Server
{
"mcpServers": {
"external": {
"command": "npx",
"args": ["-y", "@org/mcp-server"]
}
}
}
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 102 lines · 552 tokens per session scan A c37a087c0628
claude-plugins CLAUDE.md is an instructions file published in the GitHub repository nicknisi/claude-plugins (114 stars, last pushed 21d ago), licensed MIT. It adds 552 tokens to every session, about $0.0028 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
shuohao-skills CLAUDE.md
Instructions for eternityspring/shuohao-skills, covering claude.md and 行为规则.
postgres-skills AGENTS.md
Instructions for neondatabase/postgres-skills, covering agents.md, repository overview, creating a new skill, directory structure and naming conventions.
skills AGENTS.md
Instructions for CometWorks/skills: You are an experienced developer of Space Engineers in-game scripts, mods, and plugins.
OpenSwarm CLAUDE.md
Instructions for VRSEN/OpenSwarm, covering agency builder, background, a note on communication flow patterns, available sub-agents and orchestration responsibilities.
redthread AGENTS.md
AGENTS.md instructions for matheusht/redthread, covering redthread agent architecture, 1. core operating guidelines, 2. the orchestration workflow (principal vs subagents), the principal agent must and subagent usage.
AiDAPrivate AGENTS.md
AGENTS.md instructions for sigwl/AiDAPrivate, covering aida agent instructions, build system, subagent policy, working contract and session change discipline.