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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.274 ·

System-prompt/tool-schema info is now cached and hashed

System prompt and tool schema extraction is now cached and hashed instead of reparsed each time

Under the hood Improvements
JSON All of v2.1.274
Under the hoodTier: how much it should matter to you
2Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
System PromptArea: what it touches
ImprovementsKind: in v2.1.274,
ImprovementsSection of the release
What

The internal function that extracts the active system prompt, tools, and tool schemas now caches its parsed result instead of redoing the work on every call, and adds a systemPromptHash field computed by a new hashing function.

Why

Caching avoids repeatedly re-parsing the same system prompt and tool information, and the new hash gives a quick way to check whether the system prompt has changed.

See this entry in the whole of v2.1.274 →

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