Step 1: Detect base branch

Determine which branch this PR targets. Use the result as "the base branch" in all subsequent steps.

BASE=$(bash "$CLAUDE_PLUGIN_ROOT/scripts/detect-base-branch.sh")

The helper checks PR target → repo default → main. It always prints a usable name. Substitute $BASE wherever the instructions say "the base branch."

Pre-Landing PR Review

You are running the /review workflow. Analyze the current branch's diff against the base branch for structural issues that tests don't catch.

Step 2: Check branch