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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.26 30 Jan 2026

Statsig SDK Removal

The bundled Statsig client SDK has been almost entirely removed (from approximately 87 string references down to 7). This includes removal of:

The Statsig SDK key and all SDK-specific error messages
DNS-based fallback mechanisms (cloudflare-dns.com, application/dns-message)
Local storage providers, event loggers, and evaluation adapters
The node://localhost browser shim used by the Statsig SDK

Feature flag evaluation likely moved to a server-side or pre-evaluated model. This should reduce bundle size and eliminate Statsig-related network requests at startup.

See this entry in the whole of v2.1.26 →