feat(gitlab-sim): ✨ first commit

CLAUDE.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+gitlab-sim is a tool aiming to simulate and lint gitlab-ci pipelines locally and produce a graph.
+
+## Commit Message Guidelines
+
+**IMPORTANT: This project uses [Conventional Commits](https://www.conventionalcommits.org/) format.**
+
+All commit messages must follow this format:
+```
+<type>(<scope>): <description>
+
+[optional body]
+
+[optional footer(s)]
+```
+
+**Types:**
+- `feat`: A new feature
+- `fix`: A bug fix
+- `docs`: Documentation only changes
+- `refactor`: Code change that neither fixes a bug nor adds a feature
+- `test`: Adding missing tests or correcting existing tests
+- `chore`: Changes to build process or auxiliary tools
+- `perf`: Performance improvements
+- `style`: Code style changes (formatting, missing semicolons, etc.)
+
+**Scopes (commonly used):**
+- `auth`: Authentication/authorization changes
+- `security`: Security-related changes
+- `gui`: Web GUI changes
+- `api`: API changes
+- `readme`: README.md changes
+- `claude`: CLAUDE.md changes
+- `core`: Core library changes
+
+**Breaking Changes:**
+Add `!` after type/scope for breaking changes:
+- `feat(api)!: remove deprecated endpoint`
+
+**Note:** Always include a scope in parentheses, even for documentation changes.
+
+When Claude Code creates commits, it will automatically follow this format.