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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 v2.1.83

Ultraplan Enhanced with Web-Based Refinement

Ultraplan now supports an interactive refinement workflow where plans can be generated and refined in Claude Code on the web (claude.ai/code), then brought back to the local CLI for execution. Users see a "No, refine with Ultraplan on Claude Code on the web" option during plan approval, and approved plans are automatically applied locally.

Evidence

Enhanced ultraplan flow (search for "Ultraplan approved in browser", "Refine local plan", "No, refine with Ultraplan on Claude Code on the web")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.83 →