Claude docs changes for February 26th, 2026 [diff]

Executive Summary

  • Auto-memory is now enabled by default in Claude Code, replacing the previous gradual rollout. Users can toggle it via /memory or configure it with the new autoMemoryEnabled setting.
  • The /copy command now shows an interactive picker when code blocks are present, allowing selection of individual code blocks or the full response.
  • Structured outputs now document property ordering behavior: required properties always appear before optional properties in output objects.
  • Multiple critical bug fixes in 2.1.59: MCP OAuth token refresh race condition, config file corruption, and missing error messages when the working directory is deleted.

New Claude Code versions

2.1.58

New features

  • Expanded Remote Control to more users

2.1.59

New features

  • Claude automatically saves useful context to auto-memory — manage with /memory
  • Added /copy command interactive picker: when code blocks are present, allows selection of individual code blocks or the full response

Existing feature improvements

  • Improved "always allow" prefix suggestions for compound bash commands (e.g. cd /tmp && git fetch && git push) to compute smarter per-subcommand prefixes instead of treating the whole command as one
  • Improved ordering of short task lists
  • Improved memory usage in multi-agent sessions by releasing completed subagent task state

Major bug fixes

  • Fixed MCP OAuth token refresh race condition when running multiple Claude Code instances simultaneously
  • Fixed shell commands not showing a clear error message when the working directory has been deleted
  • Fixed config file corruption that could wipe authentication when multiple Claude Code instances ran simultaneously

Claude Code changes

Changed documents

Discover Plugins [Source]

  • Added a code example showing how to configure extraKnownMarketplaces in the project's .claude/settings.json for team marketplace setup. [line ~450]

Interactive Mode [Source]

  • Updated /copy command description: now shows an interactive picker when code blocks are present, allowing selection of individual code blocks or the full response. [line ~100]

MCP [Source]

  • MCP server list reorganized with entries reordered. Smartsheet documentation link updated to the new help article URL.

Memory [Source]

  • Auto-memory is now enabled by default (previously was rolling out gradually). [line ~31]
  • The /memory selector now includes an auto-memory toggle to turn the feature on or off. [line ~71]
  • New autoMemoryEnabled setting added to both user-level (~/.claude/settings.json) and project-level (.claude/settings.json) to control auto-memory. [lines ~73-90]
  • Documented that CLAUDE_CODE_DISABLE_AUTO_MEMORY environment variable takes precedence over both the toggle and settings.json, making it useful for CI/managed environments. [line ~95]

API changes

Changed documents

MCP Connector [Source]

  • Minor code formatting improvements to JSON examples (no substantive content changes).

Remote MCP Servers [Source]

  • MCP server list reorganized with many entries reordered. New servers added: LSEG (financial data and analytics), MSCI (index data and analytics), and Common Room (contacts and accounts intelligence).

Structured Outputs [Source]

  • New "Property ordering" section added: documents that required properties always appear before optional properties in structured output objects, regardless of their order in the schema definition. Includes example schema and resulting output ordering. [lines ~401-445]