Claude Code runs out of context halfway through a refactor

Do not do 60 files in one session. Make the machine do the boring part and the model the judgement:

1. grep -rl OldName src/ > files.txt, split into batches of 10.
2. New session per batch. First message: the rule ("OldName → NewName, also in tests and docs") plus the 10 file names.
3. Commit per batch. If a batch drifts, git checkout . and redo that batch.

A fresh session with a short, exact instruction beats a long session with a fading plan.