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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 v2.0.26 23 Oct 2025

Simplified Internal Architecture

What: Removed redundant parameter passing across multiple core functions

Details:

Removed unused "thread context" parameter from 8+ functions including slash command processing, user input handling, and thinking token calculation
Removed redundant "MCP tools" parameter from message loading and preparation functions
Cleaner function signatures reduce coupling and improve maintainability
Evidence: Modified functions kO2() at line 439904, MN2() at line 431613, ON2() at line 431920, bS6() at line 431736, am() at line 392896, iEA() at line 392870, and others

See this entry in the whole of v2.0.26 →