git-init_skill

Overview

This skill initializes or updates a .gitignore file with intelligent, technology-aware exclusion patterns tailored to your project. It detects the project's tech stack, proposes a structured .gitignore grouped by categories, and offers a safe merge workflow that preserves custom patterns and comments. Confirmation is required before any file is written.

How this skill works

The skill scans the project root for indicator files to detect technologies (Node, Python, Java, Docker, etc.), then builds a comprehensive set of base and technology-specific ignore patterns. If a .gitignore exists, it analyzes the file, deduplicates patterns, and asks your preferred merge strategy (Smart Merge, Append, Replace). It shows a preview of the proposed result and writes the finalized .gitignore only after you confirm.

When to use it

• Creating a new repository and you need a proper .gitignore from the start
• Adding a new language or framework to an existing repo (e.g., adding Python or Node modules)
• Cleaning up accidental commits by ensuring build artifacts and secrets are ignored
• Standardizing .gitignore structure across team projects
• Regenerating ignore rules after adopting new tooling (e.g., Docker, Terraform)

Best practices

• Run detection at the repository root so all indicator files are found
• Choose Smart Merge to preserve custom rules and comments while deduplicating patterns
• Review the preview before writing to avoid removing intentionally tracked files
• Keep lock-file decisions explicit—ask whether your team commits lock files or ignores them
• Sort and group patterns for readability; keep small, focused custom patterns at the end

Example use cases

• Initialize .gitignore for a fresh Node.js + Docker project with sensible defaults
• Merge a generated .gitignore into an existing file while preserving developer comments
• Add Python and Rust ignores when a mono-repo adopts new services
• Ignore platform-specific and IDE files to reduce accidental commits
• Switch merge strategy to Replace when starting a complete restandardization