Borrowing it
Nothing to install: this file belongs to hmcts/agentic-plugins-marketplace. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/hmcts/agentic-plugins-marketplace/main/CLAUDE.mdgit clone --depth 1 https://github.com/hmcts/agentic-plugins-marketplaceWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/hmcts/agentic-plugins-marketplace/claude-md)<a href="https://agentmods.dev/instructions/hmcts/agentic-plugins-marketplace/claude-md"><img src="https://agentmods.dev/badge/instructions/hmcts/agentic-plugins-marketplace/claude-md.svg" alt="Measured on agentmods" height="20"></a>What 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 5.1 | $0.03081 | $0.03081 |
| Opus 5 | $0.01541 | $0.01541 |
| Sonnet 5 | $0.00616 | $0.00616 |
| Haiku 4.5 | $0.00308 | $0.00308 |
Grade B, and why
agentic-plugins-marketplace CLAUDE.md scanned grade B with 2 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 6d ago.
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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
| Personal Claude config | Entries in `~/.claude/settings.json` under `mcpServers`, `hooks`, `enabledPlugins`, or `skills` | Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
| Is a skill that calls an external API directly in its prompt body (hardcoded curl, API URL, credentials) | **MCP Server** + **Skill** — extract the API calls into an MCP server, keep the workflow in the skill | How it starts
The opening of the file, as written. The whole thing — 291 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agentic Plugins Marketplace
This repo is a community plugin marketplace for Claude Code. It contains MCP servers, skills, agents, hooks, and project templates that users can install via /plugin.
Choosing the right plugin type
When a user describes something they want to build, suggest the best plugin type before asking which tool to use. Use these signals:
| If the user wants to… | Suggest |
|---|---|
| Give Claude a reusable playbook / workflow for a task | Skill |
| Let Claude call an external API or service | MCP Server |
| Offload a focused task to an isolated sub-agent | Agent |
| Run a shell script automatically on a Claude lifecycle event (tool call, stop, etc.) | Hook |
Provide a standard CLAUDE.md starting point for a project type |
Template |
When the intent is ambiguous, ask one clarifying question: "Should this run automatically in the background, be invoked on demand, or call an external service?" That answer usually resolves the type.
Creating plugins with Claude
Once the plugin type is decided, use the appropriate official Claude tool. Install the tool first if it isn't already present.
| Plugin type | Official tool | Install command |
|---|---|---|
| Skill | Skill Creator | /plugin install skill-creator@claude-plugins-official |
| Agent | Plugin Developer Toolkit | /plugin install plugin-dev@claude-plugins-official |
| MCP Server | MCP Server Dev | /plugin install mcp-server-dev@claude-plugins-official |
| Hook | Hookify | /plugin install hookify@claude-plugins-official |
| Template | Use /init |
Built into Claude Code — no install needed |
See CONTRIBUTING.md#creating-plugins-with-claude for the full guide, including directory structure, required files, and the testing checklist for each plugin type.
Migrating plugins from other formats
When a user brings in a plugin from another source — a personal dotfiles repo, a third-party marketplace, a standalone script, or a settings.json snippet — help them migrate it to this repo's structure. Work through the steps below.
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.
- 6d ago First seen · 291 lines · 3,081 tokens per session scan B a2c218a5b6dd
agentic-plugins-marketplace CLAUDE.md is an instructions file published in the GitHub repository hmcts/agentic-plugins-marketplace (3 stars, last pushed yesterday), licensed MIT. It adds 3,081 tokens to every session, about $0.0154 per session on Opus 5. A static security scan graded it B with 2 findings (reads agent configuration directories, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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