Teardown: Claude Code 2.1.274 cuts prompt tokens 20.7% as system prompts rise to 47%
ClaudeCodeLog · x · 2026-09-17
Metadata teardown of Claude Code 2.1.274 (released 1d 4h after 2.1.273, bundle +616.3 kB/+1.3%): removes claude-proactiveN, adds claude-proactive, claude-test variants and claude-code-sparse-paths.. Prompt files drop 4 (-25%) and prompt tokens fall 4,669 (-20.7%), with the mix shifting from 81.4% tools / 18.6% system to 52.8% tools / 47.2% system — a notable restructuring of built-in prompts.
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