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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 v2.1.56

2 entries read diff v2.1.55 → v2.1.56 Markdown

Version 2.1.56 is a maintenance release with internal refactoring only. The bundler output was updated to use named/destructured imports for Node.js core modules instead of default imports, simplifying several lazy initialization wrappers. There are no user-facing changes in this release.

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This release contains no new features, improvements, or bug fixes that affect users. The 99.9% structural similarity between v2.1.55 and v2.1.56 reflects purely internal changes:

  • Import modernization: Default imports like import X from "child_process" were replaced with named imports like import { execFile, spawn } from "child_process" across 12 Node.js core modules (child_process, crypto, https, node:child_process, node:fs, node:os, node:path, node:process, node:util, path, stream, url).
  • Initialization simplification: Several lazy initialization wrappers (e.g., for promisify(execFile)) were simplified or removed since named imports no longer require runtime extraction from default import objects.
Evidence

Import changes visible across the diff header; verified via counts of tengu_ flags (933 each), CLAUDE_CODE_ env vars (399 each), .describe( settings (385 each), slash commands (1,128 each), and CLI flags (129 unique each) — all identical between v2.1.55 and v2.1.56.

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

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

Verbatim
Official · Anthropic

Anthropic’s official release notes

Published verbatim by Anthropic for v2.1.56. Text is unmodified from the upstream changelog. Everything else on this page came out of the bundle instead, which is why the two lists don't match.

  • VS Code: Fixed another cause of "command 'claude-vscode.editor.openLast' not found" crashes
System prompt

The system prompt was not captured for this release, so this page cannot say whether it moved.