Borrowing it
Nothing to install: this file belongs to vasyl-bilous/component-library-mcp. 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/vasyl-bilous/component-library-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/vasyl-bilous/component-library-mcpWrote 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/vasyl-bilous/component-library-mcp/claude-md)<a href="https://agentmods.dev/instructions/vasyl-bilous/component-library-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/vasyl-bilous/component-library-mcp/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 | $0.04626 | $0.04626 |
| Opus 5 | $0.02313 | $0.02313 |
| Sonnet 5 | $0.00925 | $0.00925 |
| Haiku 4.5 | $0.00463 | $0.00463 |
Grade A, and why
component-library-mcp 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 7d 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.
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 — 259 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Component Library MCP Server
Overview
An MCP (Model Context Protocol) server that scans React and Vue projects, extracts component metadata (props, slots, events, imports, usage), and exposes it to AI coding agents via structured tools. Solves three recurring problems for AI agents: duplicate components, wrong prop APIs, and inconsistent UI patterns. The agent queries this MCP before writing any UI code — sees the full component library, correct prop signatures, and real usage examples from the codebase.
Tech Stack
- Runtime: Node.js ≥ 20
- Language: TypeScript 5.4+ (strict mode)
- MCP SDK:
@modelcontextprotocol/sdk(latest) - Transport: stdio (JSON-RPC over stdin/stdout)
- AST Parsing:
- React (TSX/JSX):
@typescript-eslint/typescript-estree^8.0.0 - Vue (SFC):
@vue/compiler-sfc^3.5.0 - Vue TSX:
@typescript-eslint/typescript-estree
- React (TSX/JSX):
- TypeScript type resolution:
typescript(programmatic compiler API) for full recursive type expansion across files - File discovery:
fast-glob^3.3.0 - Import graph: custom resolver built on Node.js
path+fs+ package.jsonpaths/exports(NOTmadge— avoids heavy dep tree) - Validation:
zod^3.23.0 for tool input schemas - Logging: custom stderr logger (stdio-safe — stdout is reserved for JSON-RPC)
- Testing:
vitest^1.5.0 (unit + performance benchmarks) - Package manager: pnpm
- Build:
tsc→dist/
Architecture
Layered, single-process Node server. Tool call flow:
Claude Code (stdio) → MCP server
↓
Tool handler (src/tools/*)
↓
Cache layer (src/cache)
↓ ↓ (miss / stale)
return Scanner (src/scanner)
↓
Parsers (src/parsers) → AST
↓
Extractors (props, slots, events, JSDoc)
↓
Import resolver → graph
↓
ComponentInfo cached by (file_path, mtime)
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.
- 7d ago First seen · 259 lines · 4,626 tokens per session scan A 46ac6e8b0a26
component-library-mcp CLAUDE.md is an instructions file published in the GitHub repository vasyl-bilous/component-library-mcp (1 stars, last pushed 4mo ago), licensed MIT. It adds 4,626 tokens to every session, about $0.0231 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 2026-08-31.
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