gitlab-mcp CLAUDE.md

A set of development instructions for a GitLab MCP server. It requires test-driven development, meaning tests are written before the code, along with coverage, documentation, and session-management checks.

In plain words
What is it for?
Use it to guide GitLab MCP server changes through failing tests, passing tests, code-coverage checks, phase gates, documentation, and handoffs between work sessions.
Why use it?
It gives development work a fixed quality process and prevents a project from advancing while tests or required records are incomplete.

Instructions file

Install

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.

agentmods
npx agentmods add instructions/wadew/gitlab-mcp/claude-md
Clone the repo
git clone --depth 1 https://github.com/wadew/gitlab-mcp
Per session 2,635 This file is loaded in full into every session.
When invoked 2,635 The same file — it is already loaded in full.
Security scan C 2 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.02635 $0.02635
Opus 5 $0.01318 $0.01318
Sonnet 5 $0.00527 $0.00527
Haiku 4.5 $0.00264 $0.00264

Measured 3d ago against content hash 53ef2f343dbf, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

gitlab-mcp CLAUDE.md scanned grade C 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 3d 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -LsSf https://astral.sh/uv/install.sh | sh

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -LsSf https://astral.sh/uv/install.sh | sh
CLAUDE.md · 376 lines

How it starts

The opening of the file, as written. The whole thing — 376 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude Code Development Guide - GitLab MCP Server

Ground Rules

Test-Driven Development (TDD) - MANDATORY

ALWAYS write tests first. Watch them fail. Then build code to pass them.

  1. Red: Write a failing test that defines desired behavior
  2. Green: Write minimal code to make the test pass
  3. Refactor: Improve code while keeping tests green

No exceptions. No shortcuts. No "I'll add tests later."

Code Coverage Requirements

  • Minimum: 80% code coverage per phase
  • Target: 100% test pass rate
  • Gate: Cannot proceed to next phase without meeting both criteria

Phase Gate Criteria

Before moving to next phase, ALL must be true:

  • ✅ All phase tests written (TDD process followed)
  • ✅ 100% of tests passing (no failures, no skips)
  • ✅ ≥80% code coverage for phase code
  • ✅ Phase documentation complete
  • ✅ Session logs updated
  • next_session_plan.md updated

Session Management Protocol

CRITICAL: Always maintain continuity between sessions.

Starting a Session (After Context Reset)
  1. Read this file (CLAUDE.md) for ground rules
  2. Read docs/gitlab-mcp-server-prd.md for product requirements and feature specs
  3. Read next_session_plan.md for current state and next steps
  4. Review current phase documentation
  5. Check test coverage and status
During Session
  • Follow TDD rigorously
  • Update documentation as you go
  • Track decisions and issues
  • Run tests frequently
Ending a Session (MANDATORY BEFORE CONTEXT RESET)
  1. Archive current session to docs/session_management/sessions/
  2. Update docs/session_management/session_index.md
  3. MOST CRITICAL: Update next_session_plan.md with:
    • Current phase and exact progress
    • What was completed this session
    • Current test coverage numbers
    • Any blockers or issues
    • Specific next steps (file names, function names, line numbers)
  4. Ensure all tests are passing
  5. Commit if at stable checkpoint

Documentation Requirements

Code Documentation
  • Docstrings: Every module, class, and function
  • Type Hints: All function signatures
  • Inline Comments: For complex logic only

Read the full file on GitHub · 376 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.

  1. 3d ago First seen · 376 lines · 2,635 tokens per session scan C 53ef2f343dbf

Subscribe to this mod's changes

gitlab-mcp CLAUDE.md is an instructions file published in the GitHub repository wadew/gitlab-mcp (5 stars, last pushed 7mo ago), licensed MIT. It adds 2,635 tokens to every session, about $0.0132 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.