What is skilljack-mcp CLAUDE.md?

Repository instructions for skilljack MCP, a TypeScript project whose server and browser interface use different MCP software versions.

They are for developing, building, testing, and type-checking the Skilljack MCP server and its browser interface.

They document the build, test, type-check, development, and inspection commands, as well as the project’s split SDK setup.

How olaservo/skilljack-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to olaservo/skilljack-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.

Copy the file

curl -O https://raw.githubusercontent.com/olaservo/skilljack-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/olaservo/skilljack-mcp

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/olaservo/skilljack-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/olaservo/skilljack-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/olaservo/skilljack-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/olaservo/skilljack-mcp/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/olaservo/skilljack-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/olaservo/skilljack-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 6,332 This file is loaded in full into every session.

When invoked 6,332 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.06332	$0.06332
Opus 5.5	$0.02533	$0.02533
Sonnet 5.5	$0.01266	$0.01266
Haiku 4.5	$0.00633	$0.00633

Measured 12d ago against content hash e10370390b64, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skilljack-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 12d 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.

CLAUDE.md · 230 lines

How it starts

The opening of the file, as written. The whole thing — 230 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Skilljack MCP - Developer Guide

Commands

npm run build - Compile TypeScript to dist/ (two Vite UI builds, mcp-app and skill-display, then tsc)
npm run dev - Watch mode (tsx)
npm test - Run the vitest suite
npm run typecheck - Typecheck both halves (tsc --noEmit for the server, tsconfig.ui.json for src/ui)
npm run inspector - Test with MCP Inspector

CI (.github/workflows/ci.yml) runs npm ci, npm run build, and npm test on Node 22 for every push to main and every PR against main. Node 22+ is required; Node 20 reached end of life in April 2026.

Two bundles: server and UI

This package spans two independent bundles that share only the MCP wire format:

Server half (everything except src/ui/**) is on MCP TypeScript SDK v2 (2.4+) — @modelcontextprotocol/server, @modelcontextprotocol/server/stdio, @modelcontextprotocol/server/ext/skills, @modelcontextprotocol/node (+ @modelcontextprotocol/client and @modelcontextprotocol/client/ext/skills in tests only) — and registers its MCP Apps tools and resources through registerAppTool / registerAppResource from @modelcontextprotocol/ext-apps/server. Typechecked by the root tsconfig.json, which excludes src/ui/**.
Browser half (src/ui/mcp-app.ts, src/ui/skill-display.ts) imports only @modelcontextprotocol/ext-apps, on 2.0.0 since #109 (2026-09-24). Vite bundles it into self-contained HTML that runs in an iframe. Typechecked by tsconfig.ui.json (run by npm run build:ui).
@modelcontextprotocol/ext-apps is a runtime dependency since the server imports its /server helpers (a self-contained module with no imports of its own); its peer dependencies @modelcontextprotocol/{core,client} and zod install alongside it. Hosts locate a tool's UI by reading _meta['ui/resourceUri'] and/or _meta.ui.resourceUri; registerAppTool emits both, and src/mcp-apps-meta.test.ts checks that on the wire. The vendored src/ui-meta.ts port that bridged the gap while ext-apps had no v2 release is gone, as is the @modelcontextprotocol/sdk v1 devDependency it dated from (v1 still appears in the lock file as a peer of @anthropic-ai/claude-agent-sdk, used only by the evals).

Read the full file on GitHub · 230 lines

Changes

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.

12d ago Changed · +3 lines · +858 tokens per session e10370390b64
1mo ago Changed · +6 lines · +340 tokens per session 8b0c27e9ae4b
1mo ago Changed · -2 lines · +2 tokens per session aa91a9bf3e5a
1mo ago Changed · +14 lines · +733 tokens per session b49f16981855
1mo ago Changed · +4 tokens per session 43d72dbdf952
2mo ago First seen · 209 lines · 4,395 tokens per session scan A 6374d8ce3ecd

Subscribe to this mod's changes

skilljack-mcp CLAUDE.md is an instructions file published in the GitHub repository olaservo/skilljack-mcp (21 stars, last pushed 3d ago), licensed MIT. It adds 6,332 tokens to every session, about $0.0253 per session on Opus 5.5. 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.

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skilljack-mcp: Instructions file for Claude Code