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mcore-split-pr

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Split a PR into multiple PRs to reduce the number of required CODEOWNERS reviewer groups.

skills/mcore-split-pr/SKILL.md

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# Split PR by CODEOWNERS Groups

Split a large pull request into multiple smaller PRs, where each PR touches
the fewest possible CODEOWNERS reviewer groups. The goal is to reduce review
burden: a PR that only touches `megatron/core/` needs only the core reviewers,
while a PR that also touches `examples/`, `tools/`, and `megatron/training/`
pulls in many additional groups.

## Answer-First Constraints

For split-planning questions, lead with these constraints before the full
workflow:

- Minimize CODEOWNERS reviewer groups per PR, but each resulting PR must still