Create PR Skill

Instructions

Step 1: Gather Context

Detect the PR's base branch instead of hardcoding main. Set BASE_BRANCH once and reuse it in every diff/log command:

BASE_BRANCH=$(git rev-parse --abbrev-ref origin/HEAD 2>/dev/null | sed 's@^origin/@@')
BASE_BRANCH=${BASE_BRANCH:-main}

git rev-parse --abbrev-ref origin/HEAD returns the remote's default branch (e.g. origin/main); the sed strips the origin/ prefix. The fallback to main covers repos where origin/HEAD is unset. If you know the PR was branched off a non-default branch, override BASE_BRANCH explicitly before running the commands below.