Claude Code 2.1.307 system prompt diff reveals cleaned-up hook guidance, 31 prompt files
ClaudeCodeLog · x · 2026-10-22
The tracked system prompt diff for Claude Code 2.1.307 shows the tool-hook guidance was cleaned up: the Harness bullet now ends at "treat hook output as user feedback," removing the malformed "feedback.Response" fragment and reducing ambiguity in how Claude interprets hook output during tool use. The accompanying prompt index shows 31 prompt files total (7 system, 24 tool), with per-version token counts tracked across releases. The billing header bumped to ccversion=2.1.307.native.
Related event: Claude Code 2.1.307 Update Drops Haiku 3.5, Tweaks System Prompts(2 posts)→
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