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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 v2.1.58

3 entries read diff v2.1.56 → v2.1.58 Markdown

A small maintenance release focused on infrastructure improvements. The main user-facing change is improved Windows path support when adding marketplace sources. Behind the scenes, the bridge polling mechanism for remote sessions has been reworked to be server-configurable.

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3 entries

Changesopen

Windows path support for marketplace sources#

What

On Windows, you can now use native Windows-style paths (backslash separators and drive letters) when adding a marketplace source via the interactive UI or CLI.

Usage
# These now work on Windows (in addition to Unix-style paths):
claude marketplace add .\my-skills
claude marketplace add ..\shared-skills
claude marketplace add C:\Users\me\skills
Details
  • Adds recognition of .\, ..\, and drive-letter paths (e.g., C:\) when process.platform is "win32"
  • Unix-style paths (./, ../, /, ~) continue to work on all platforms
  • The resolved path must point to a directory or a .json file (e.g., marketplace.json)
Evidence

Marketplace source parser (search for startsWith(".\\") and [a-zA-Z]:[/\\]) — $v1() at line ~472168

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

Optimized bridge polling for remote sessions#

Feature flag
tengu_bridge_poll_interval_ms Not enough to say

Nothing here resolved what this flag was doing on this version, so nothing here should be read as on or off.

This account: no value returned · anonymous baseline: no value returned · compiled default in v2.1.58: no gate table built for this version

These values were read against a different version of Claude Code, so treat them as the nearest reading available instead of one taken on this release.

Read once, for one account on one subscription tier, against v2.1.58. It isn't a statement about your account. What a flag value here can and cannot tell you

What

The polling interval for the bridge connection (used in remote/cloud sessions) is now dynamically configurable from the server rather than being hardcoded.

Details
  • Poll interval is now controlled by the tengu_bridge_poll_interval_ms feature flag, with a default of 1000ms and a floor of 100ms
  • The flag value is cached and refreshed every 5 minutes (300,000ms TTL)
  • The block_ms parameter was removed from work-poll requests, simplifying the client-server protocol
  • These changes allow Anthropic to tune remote session responsiveness server-side without requiring client updates
Evidence

New cached config reader KL1() at line ~532330 (search for "tengu_bridge_poll_interval_ms")

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

Updated Haiku model descriptions#

What

The model picker descriptions for Haiku were reorganized internally. Both Haiku 3.5 and Haiku 4.5 remain available; the user-facing text ("Haiku 4.5 · Fastest for quick answers" and "Haiku 3.5 for simple tasks") is unchanged.

Evidence

Model option functions at lines ~530549 and ~530558 (search for "Fastest for quick answers")

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.

1 entry

Notesopen

#

This release also modernizes internal import style across the codebase, switching from default imports to named/destructured imports for Node.js built-in modules (child_process, crypto, node:fs, node:path, etc.). This is a purely internal refactoring with no behavior change.

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 v2.1.58. 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.

  • Expand Remote Control to more users
Read it on GitHub →
System prompt

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

Which releases were captured →