git-performance-issue-investigator

When the user needs to investigate performance issues in a Git repository by finding specific code changes, identifying responsible commits, and contacting authors. This skill is triggered by requests involving finding commits containing specific variables or code patterns, identifying earliest/introducing commits, extracting author information (name, email), and communicating about performance issues. It provides capabilities for searching Git history for specific code patterns using git log -S, retrieving full commit details with git show, extracting author metadata, and generating formatted communications using templates.

Instructions

Overview

This skill investigates performance issues in Git repositories by tracing code changes to specific commits, identifying responsible authors, and generating communications.

Core Workflow

1. Initialize Investigation

Identify the target Git repository path in the workspace
Confirm the specific code pattern or variable name to search for (e.g., remove_caching_layer)
Locate any communication templates in the workspace (e.g., template.txt)

2. Find Introducing Commit

Use git log with the -S flag to search for the earliest commit containing the specified code pattern: