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Plan correction E: cp -r replaced with find-loop that strips .template suffix on copy. Without this Test 3 (project mode: CLAUDE.md copied) can't pass — fixture creates CLAUDE.md.template, target expects CLAUDE.md. Real intent: brain stores templates as *.template, consumed without suffix. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>