PR Preparation Skill Systematic PR preparation that validates tests and generates high-quality PR bodies. Overview Prepares contributions by analyzing the target repo's conventions, git history, test coverage, and generating properly-formatted PR bodies. When to Use : - Preparing a PR for an external repository - Contributing bug fixes or features When NOT to Use : - Internal commits (use normal git workflow) - PRs to your own repositories --- Workflow --- Phase 0: Isolation Check (BLOCKING) CRITICAL : Run this FIRST. Do not proceed if PR mixes unrelated changes. Commit Type Analysis Rule : I…