Claude Code v1.0.111

What: The /model command now validates custom model names by making a test API request before accepting them.

How to use:

# Try setting a custom model - it will be validated first
/model claude-opus-4-20250514

# If the model doesn't exist, you'll get an error immediately:
# "Model 'claude-opus-4-20250514' not found"

Details:

• Validation occurs automatically when setting custom models
• Built-in models (sonnet, haiku, opus) bypass validation for faster response
• Validated models are cached to avoid repeated API calls
• Provides specific error messages for model-not-found vs other API errors
• Evidence: HDB() at line 425289 in v1.0.111.js

What: Shell command parsing now uses error-safe wrapper functions that gracefully handle malformed commands instead of throwing exceptions.

Details:

• New vC() function at line 348215 wraps parse operations with try-catch
• New q8() function at line 348265 provides unified quoting with fallback strategies
• New NX9() function at line 348229 handles quote operations with error checking
• Commands with syntax errors now fail gracefully rather than crashing
• Improved handling of complex shell redirections and pipes
• Evidence: vC(), NX9(), and q8() functions at lines 348215, 348229, and 348265

What: The spinner now changes color from blue to orange when operations take longer than 3 seconds, providing visual feedback about potentially stuck processes.

Details:

• Spinner starts blue during normal operation
• After 3 seconds, gradually transitions to orange over the next 3 seconds
• Fully orange at 6+ seconds to indicate significantly delayed operation
• Smooth color interpolation provides clear visual feedback
• Only affects the spinner appearance, doesn't change functionality
• Evidence: nE0() at line 402439, color interpolation in cE0() at line 402326 and lE0() at line 402369

What: Files mentioned with @ are no longer re-read if they haven't been modified since the last read.

Details:

• Prevents redundant file reads when the same file is mentioned multiple times
• Checks file modification timestamps before reading
• Returns cached content if file is unchanged
• New already_read_file attachment type (not shown to user)
• Primarily benefits files that were written by Claude during the session
• Evidence: PE0() at line 398623 with timestamp checking at lines 398630-398649

What: Settings files (.claude/settings.json and .claude/settings.local.json) can now only set specific whitelisted environment variables.

Details:

• 45 allowed environment variables including:
• API configuration: ANTHROPIC_API_KEY, ANTHROPIC_MODEL
• Feature flags: DISABLE_TELEMETRY, DISABLE_ERROR_REPORTING
• Proxy settings: HTTP_PROXY, HTTPS_PROXY
• Tool timeouts: BASH_MAX_TIMEOUT_MS, MCP_TIMEOUT
• Prevents arbitrary environment variable injection via settings files
• Security enhancement to protect against potential configuration exploits
• Evidence: YCB Set at lines 427822-427867, WCB() at line 427868

The error message when conversations become too long now correctly instructs users to press escape twice instead of once:

• Old: "Press esc to go up a few messages and try again"
• New: "Press esc twice to go up a few messages and try again"
• Evidence: Variable Ks6 at line 398957

Enhanced microcompact to clean up cached file data when compacting old tool results, preventing memory accumulation over long sessions.

• Evidence: av() function at line 399242 with cleanup logic at lines 399328-399344

Added detection for negative sentiment and "keep going" phrases in user prompts for better analytics and potential future UX improvements.

• Evidence: usB() at line 435565 and msB() at line 435571

Improved handling of terminal resume after Ctrl+Z by resetting line counts when receiving SIGCONT signal.

• Evidence: handleResume() in class xU1 at line 362978

Enhanced session title generation to skip slash commands and command output when extracting representative user prompts.

• Evidence: h55() at line 426021

Transcript mode now displays the model name used for each assistant response.

• Evidence: WDB() at line 424710

Enhanced notification messages for tool permission requests to be more descriptive.

• Evidence: _f5() at line 431409

Fixed handling of non-TTY environments by checking stdout.isTTY instead of using a global flag, improving compatibility with piped output and CI environments.

• Evidence: Multiple locations including class xU1 at line 361792

Added option to skip automatic working directory updates for certain shell operations to prevent unintended directory changes.

• Evidence: uT6() signature change at line 373626 with new parameter at line 373560

Improved attachment normalization to handle background remote sessions and other new attachment types gracefully.

• Evidence: rn6() at line 396057 with new cases at lines 402372-402381

• Refactored shell parsing to use centralized wrapper functions for consistency
• Renamed and restructured ink rendering class from A$1 to xU1
• Improved color application in text rendering with transform-based approach
• Enhanced border rendering to use theme-aware color functions
• Removed unused dependencies (onetime, signal-exit, stream imports)
• Cleaned up unused functions and variables (19 removed total)

Note: This changelog focuses on user-visible changes and significant improvements. Many internal refactorings and code reorganizations have been omitted for brevity.