# Claude Code v2.1.58

> Claude Code v2.1.58, released 25 Feb 2026 (2026-02-25). 4 entries read out of the shipped bundle. Unofficial, and not affiliated with Anthropic.

Web version: https://changelogs.core-directive.com/v/2.1.58

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.

## Changes

### 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

### Optimized bridge polling for remote sessions

**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"`)

- Flag `tengu_bridge_poll_interval_ms`: Not enough to say (read for one account on one subscription tier against v2.1.58; this account: no value returned, anonymous baseline: no value returned, compiled default: 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.

### 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"`)

## Notes

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.