Splitting Branches Into Stacked PRs/MRs

Overview

Split a large branch into a stack of smaller PRs/MRs where each (except the bottom) targets the previous one — true stacked PRs, not "expanding-snapshot" PRs that all target main.

Core principle: 200-400 line PRs correlate with the highest defect-detection rates and best architectural feedback; beyond ~400 lines feedback degrades to surface-level. Use as a heuristic, not a law — split aggressively, target ~300 lines, adjust per language.

Announce: "I'm using the split-branch skill to plan/execute the split."

Targets and Weighting