CLAUDE LABJP
RELEASE — Claude Code v2.1.243 shipped on August 25 with broad improvements across usage reporting, model selection, sign-in, and reliabilityUSAGE — /usage now breaks results down per loop, showing run count, total tokens, tokens per run, and last run, which makes a chatty /loop task easy to spotSETTINGS — modelPicker lets you curate the /model list with your own order and labels, while promptCacheTtl and subagentPromptCacheTtl let the main conversation and subagents keep different cache lifetimesLOGIN — /login now offers keyless sign-in with an Anthropic Console account, so organizations that do not permit API keys can still get inPERFORMANCE — The native binary is now zstd-compressed, dropping from roughly 340MB to 75MB on Linux x64, and each session uses about 40 to 60MB less memoryFIX — v2.1.245 resolves a startup crash on distributions shipping glibc 2.44, including Arch Linux, CachyOS, and Fedora RawhideRELEASE — Claude Code v2.1.243 shipped on August 25 with broad improvements across usage reporting, model selection, sign-in, and reliabilityUSAGE — /usage now breaks results down per loop, showing run count, total tokens, tokens per run, and last run, which makes a chatty /loop task easy to spotSETTINGS — modelPicker lets you curate the /model list with your own order and labels, while promptCacheTtl and subagentPromptCacheTtl let the main conversation and subagents keep different cache lifetimesLOGIN — /login now offers keyless sign-in with an Anthropic Console account, so organizations that do not permit API keys can still get inPERFORMANCE — The native binary is now zstd-compressed, dropping from roughly 340MB to 75MB on Linux x64, and each session uses about 40 to 60MB less memoryFIX — v2.1.245 resolves a startup crash on distributions shipping glibc 2.44, including Arch Linux, CachyOS, and Fedora Rawhide
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promptCacheTtl

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Claude Code/2026-08-26Advanced

I decide the prompt cache TTL by where I come back to, not how long I was away

Claude Code v2.1.242 added promptCacheTtl and subagentPromptCacheTtl. Whether the one-hour cache pays off depends on returning to the same directory and the same git state, not on how long the break was. Here is the order I check things in.