This article was created by AI.

Introduction

Have you ever wanted to analyze the edit history of files managed in a GitHub repository? There are cases where you want to understand change patterns of files that have been updated over a long period, or the evolution process of a project.

GitHub File History Analyzer is a command-line tool developed to meet such needs.

Tool Overview

This tool provides the following features:

  • Retrieves commit history of specific files using the GitHub API
  • Statistical analysis of changes (added/deleted line counts, change type classification, etc.)
  • AI-powered analysis of edit patterns via OpenRouter (Gemini 2.5 Pro, etc.)
  • Output of analysis results in Markdown/JSON format

Development Background

In a digital archive project, there was a need to track long-term XML file editing work. This tool was developed out of the need for deeper insights (editing trends, work quality, progress, etc.) that cannot be obtained from simple git log.

Technical Implementation

Technologies Used

  • Language: Python 3.8+
  • Key Libraries:
    • PyGithub (GitHub API wrapper)
    • requests (HTTP communication)
    • python-dotenv (environment variable management)

Architecture

The tool consists of two main components:

  1. GitHubFileHistoryAnalyzer: Retrieves and analyzes file history using the GitHub API
  2. OpenRouterClient: Client for AI analysis
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Practical Usage Examples

Basic Commands

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Analysis Results Example

The tool provides the following information:

  • Statistics: Total commits, added/deleted line counts, monthly activity
  • Change type classification: Structural changes, content changes, attribute changes, etc.
  • AI analysis: Editing trends, purpose inference, improvement suggestions

Intended Use Cases

  1. Code review assistance: Understanding development patterns from file change history
  2. Document management: Progress tracking for long-term document editing projects
  3. Project analysis: Research on the development process of open-source projects
  4. Quality management: Evaluation of editing work consistency and quality

Limitations and Future Outlook

Current Limitations

  • GitHub API rate limits (5,000 requests/hour when authenticated)
  • Processing large file histories takes time
  • OpenRouter API key is required for AI analysis

Planned Improvements

  • Batch analysis of multiple files
  • Support for custom analysis prompts
  • Visual report generation (graphs, charts)
  • CI/CD pipeline integration support

Installation and Setup

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Summary

GitHub File History Analyzer is a tool for analyzing file edit history and understanding project evolution. It is intended for use in long-term projects and open-source projects involving many contributors.

The tool is published under the MIT license and can be freely used and improved by anyone. Feedback and contributions are welcome at the GitHub repository.

Repository: https://github.com/nakamura196/github-history-ai-analyzer License: MIT License