Claude Code v2.0.49

What: Complete integration of GrowthBook SDK (v1.6.1) for remote feature management and A/B testing How to use:

# Enable GrowthBook integration
export CLAUDE_CODE_ENABLE_GROWTHBOOK=true
claude

Details:

• Enables Anthropic to dynamically control features without CLI updates
• Supports real-time feature flag updates via Server-Sent Events (SSE)
• Implements intelligent caching with 60-second stale TTL and 4-hour max age
• Includes automatic retry logic with exponential backoff
• Features pause when browser tab is hidden to save resources
• Evidence: bn2() at line 447290, z31 class at line 448817, SDK key CO0 at line 35311

What: New system to track which local directories correspond to which GitHub repositories How to use: This feature works automatically when you work with GitHub repositories. It enables repository-aware context switching and settings. Details:

• Automatically tracks repo-to-directory mappings in settings
• Enables better multi-repository workflow support
• Stored in githubRepoPaths field in user settings
• Evidence: lX9() at line 507265, iX9() at line 507276

What: Foundry deployment users now have access to all Claude models without version restrictions Details: Previously, Foundry users had the same model restrictions as first-party users (excluding claude-3-* models). Now Foundry users can access all available models including legacy versions.

• Evidence: Ez4() at line 86189 vs dC4() at line 86088 in v2.0.47

What: Significantly improved display width calculation for emoji, flag characters, and complex Unicode scripts Details:

• Adds fast-path optimization for ASCII strings (performance improvement)
• Correctly handles Regional Indicator flag emojis (🇺🇸, 🇬🇧)
• Proper width calculation for keycap sequences (1️⃣, 2️⃣)
• Better support for zero-width characters in Indic, Arabic, and Hebrew scripts
• Prevents terminal misalignment issues with emoji-containing content
• Evidence: N94() at line 61894, q94() at line 61905, _g0() at line 61921

What: Enhanced proxy agent with DNS address family normalization Details:

• Adds custom DNS lookup callback for better proxy compatibility
• Normalizes IPv4/IPv6 address family specifications
• Prevents connection failures with proxies sensitive to address family format
• Maintains existing mTLS certificate support
• Evidence: WhQ() at line 146672, N$8() at line 146623

What: Improved protection against accidental modification of parent workspace settings Details: When working in a subdirectory, Claude Code now denies write access to parent workspace .claude/settings.json and .claude/settings.local.json files. This prevents unintended configuration changes when working in nested directories.

• Evidence: oA2() function sandbox configuration (diff line 5527-5531)

What: VerifyResult tool now includes JSON Schema in addition to Zod schema Details:

• Provides dual validation formats for better compatibility
• Enables clearer error messages when tool is used incorrectly
• Supports both inputSchema (Zod) and inputJSONSchema (JSON Schema)
• Evidence: UM3() at line 497621 vs r$3() at line 494892 in v2.0.47

• Refactored text segmentation functions for better emoji handling (y44() at line 76651, k44() at line 76643)
• Consolidated import statements for better module organization
• Updated internal function names for consistency (147 functions added, 22 removed)

• Added support for dynamic feature rollouts via remote configuration
• Implemented stale-while-revalidate caching strategy for feature flags
• Enhanced analytics tracking for feature evaluation and experiment participation