No massive sweep PRs: split mechanical rollouts into minimal batches #4708

Ezra, 2026-10-23, on pds#244, a split of 61 subfiles touching 624 files: "don't allow massive sweep PRs like this anymore; do them in minimal batches."

Rule to add as an agent rule and, ideally, a mechanism (per the rules-as-mechanisms directive):

• A mechanical rollout across many files opens in minimal batches, about four files or one chapter per PR.
• The next batch opens after the previous one merges, which also limits private-repo Actions minutes.
• A PR-size check in gha (changed files over a threshold, with an opt-out label) would enforce it; tracked as a follow-up here.

Applied first to the one-div-per-subfile rollout (gha#1176): pds#244 now holds four files.

Posted by Claude Code (AI agent) --- not written by a human.
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