Version 2.1.42

Transfer your current Claude Code session to Claude Desktop for a seamless cross-platform workflow.

# In Claude Code interactive mode
/desktop

• Checks if Claude Desktop is installed and up-to-date (requires v1.1.2396+)
• Saves the current session before transfer
• Opens Claude Desktop and continues the conversation there
• Alias: /app
• Supported on macOS and Windows only
• If Claude Desktop is not installed, offers to download it

Session transfer system (search for "Session transferred to Claude Desktop")

A new callout prompts users to choose their preferred thinking intensity when first using Opus 4.6.

• Appears when using Opus 4.6 for the first time
• Offers "medium" (balances efficiency and intelligence) or "high" (best for hardest tasks) options
• Pro plan users default to medium effort; others default to high
• The callout can be dismissed and won't reappear
• Effort can always be changed later via /model

Effort callout modal (search for "Effort in Opus 4.6")

Long-running sessions now receive automatic notifications when the date changes at midnight.

• Claude is informed of the new date without user intervention
• Helps maintain accurate context for date-sensitive operations
• The message instructs Claude not to mention the date change explicitly to users

Date change handler (search for "The date has changed. Today's date is now")

When a session is resumed after an interruption, Claude now receives a clear instruction to continue from where it left off.

• Improves session continuity after interruptions
• Part of the print.ts auto-resume system

Interrupted turn handling (search for "Continue from where you left off.")

The auto memory system prompt has been completely rewritten with clearer, more actionable guidance.

Changes:

• Simplified structure with clear "What to save" and "What NOT to save" sections
• More specific guidelines about when to consult memory files
• Explicit section for handling user requests to remember or forget things
• Cleaner formatting with focused bullet points

Auto memory prompt (search for "# auto memory")

Added a 3-minute timeout with actionable feedback for AWS authentication refresh.

• If AWS auth refresh takes longer than 3 minutes, users receive clear guidance
• Message suggests running the auth command manually in a separate terminal

AWS auth timeout (search for "AWS auth refresh timed out after 3 minutes")

Marketplace caching now handles stale directories more gracefully.

Changes:

• Renamed "Updating existing marketplace cache…" to "Refreshing marketplace cache…"
• Added detection for stale directories with automatic cleanup and re-clone
• Better error messages when git pull fails
• Clearer status messages during cache operations

Marketplace refresh (search for "Refreshing marketplace cache…")

Expanded detection of image processing errors for better error handling.

New error patterns detected:

• corrupt image, premature end, zlib: data error
• zero width, zero height
• pixel limit, too many pixels, exceeds pixel, image dimensions
• out of memory, Cannot allocate, memory allocation

Image error classification (search for "too many pixels")

Added a new error type for network egress proxy blocks in managed environments.

• New EgressBlockedError with clear messaging
• Message: "Access to {domain} is blocked by the network egress proxy"

Egress blocking (search for "EgressBlockedError")

Clearer wording for model inheritance in model selection.

Change: "Inherit (default)" → "Inherit from parent (default)"

Model picker (search for "Inherit from parent (default)")

Better handling of session 409 conflicts with server-side sync.

• Adopts server's lastUuid from headers when conflicts occur
• Re-fetches entries to ensure consistency
• Logs detailed sync information for debugging

Session 409 handler (search for "Session 409: adopting server lastUuid")

Added explicit guidance for Windows users about shell syntax.

• Reminder to use Unix shell syntax (not Windows syntax) for bash commands
• Examples: /dev/null not NUL, forward slashes in paths

Shell syntax hint (search for "use Unix shell syntax, not Windows")

Improved error message for agent files missing required frontmatter.

Change: Now specifically mentions 'description' in the error message rather than generic field name.

Agent validation (search for "is missing required 'description' in frontmatter")

Cache editing beta header is now enabled for cached microcompact operations.

• Only applies to first-party API users in the main REPL thread
• Improves performance when working with compacted conversations

Cache editing (search for "Cache editing beta header enabled for cached microcompact")

• Removed Bun-specific WebSocket ping logging that was causing noise (search for "WebSocketTransport: Sent ping")
• Fixed model parsing for abbreviated model names like 3-5-sonnet and 3-7-sonnet to correctly detect context limits

• Removed verbose prompt cache break logging ([PROMPT CACHE BREAK] messages)
• Removed detailed cache break reason strings (model changed, tools changed, system prompt changed)
• Simplified Opus plan restriction messaging
• Removed fs from the documented example list in hook globals (still accessible via require())