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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 v1.0.109 8 Sep 2025

Enhanced API Error Tracking

What: Improved error reporting with gateway and infrastructure tracking for API failures How to use: Automatic - enhanced error information appears in debug logs and telemetry Details:

Extracts gateway information from API response headers
Better visibility into which infrastructure components handled requests
Enhanced debugging capabilities for API failures
Evidence: JE0() header extraction function, VE0() at line 393771 (renamed from XE0)

See this entry in the whole of v1.0.109 →