What is mcp-lightcast CLAUDE.md?

Project instructions for MCP Lightcast, a Python server that connects agents to Lightcast career-data APIs. Lightcast provides information about job titles, skills, and careers.

Setting up the project, running it for web or Claude Desktop use, validating authentication, and running linting, type checks, and tests.

They give an agent the project's setup commands, run modes, configuration checks, and quality checks in one place. This reduces guesswork when developing or running the server.

How lawwu/mcp-lightcast configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to lawwu/mcp-lightcast. 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/lawwu/mcp-lightcast/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/lawwu/mcp-lightcast

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/lawwu/mcp-lightcast/claude-md/github.svg)](https://agentmods.dev/instructions/lawwu/mcp-lightcast/claude-md)

Your own site

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

Per session 1,635 This file is loaded in full into every session.

When invoked 1,635 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	$0.01635	$0.01635
Opus 5.5	$0.00654	$0.00654
Sonnet 5.5	$0.00327	$0.00327
Haiku 4.5	$0.00163	$0.00163

Measured 2mo ago against content hash feaba31d45fb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-lightcast 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 2mo 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 · 178 lines

How it starts

The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

MCP Lightcast is a Model Context Protocol (MCP) server that provides FastMCP-based integration with Lightcast APIs for job titles, skills analysis, and career data. The project is built using Python 3.12+ and follows modern Python development practices.

Current Status: v0.2.0 - Production ready with 11/18 API endpoints working (61% coverage)

Essential Commands

Development Setup

make setup                    # Initial project setup (installs deps, creates .env)
make install-dev              # Install all dependencies including dev
uv sync --all-groups          # Sync all dependencies from lockfile

Running the Server

make run                      # Run MCP server (streamable-http, port 3000)
make run-stdio                # Run with stdio transport (for Claude Desktop)
make dev-server               # Run with debug logging
make validate-config          # Validate configuration and test auth

Code Quality & Testing

make check                    # Run all checks (lint + type-check + test)
make lint                     # Run ruff linting
make type-check               # Run mypy type checking
make format                   # Format with black and ruff
make test                     # Run pytest tests
make test-coverage            # Run tests with coverage report
make test-apis-manual         # Test with real API calls (requires credentials)

Environment Configuration

make test-env-check           # Check if API credentials are configured
make claude-config            # Show Claude Desktop integration config

Architecture Overview

Core Components

Entry Points:

src/mcp_lightcast/__init__.py - Main CLI entry point with Click framework
src/mcp_lightcast/__main__.py - Module execution entry point
src/mcp_lightcast/server.py - FastMCP server instance and tool registration

Read the full file on GitHub · 178 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.

2mo ago First seen · 178 lines · 1,635 tokens per session scan A feaba31d45fb

Subscribe to this mod's changes

mcp-lightcast CLAUDE.md is an instructions file published in the GitHub repository lawwu/mcp-lightcast (5 stars, last pushed 8d ago), licensed MIT. It adds 1,635 tokens to every session, about $0.0065 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 2026-08-31.

Research

mcp-lightcast CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mcp-lightcast CLAUDE.mdlawwu/mcp-lightcast	Instructions file	5	8d ago	MIT	A	1,635	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

mcp-lightcast: Instructions file for Claude Code