[Release] anthropics/claude-code v2.1.170: v2.1.170

Claude Code v2.1.170 introduces Claude Fable 5, a powerful Mythos-class model now available for general use with capabilities exceeding all previously released models. The release also fixes a critical bug where sessions launched from VS Code's integrated terminal failed to save transcripts and weren't resumable. Users should update to access Fable 5's enhanced capabilities and benefit from the session persistence fix.

Key Points

• •Claude Fable 5 (Mythos-class) is now generally available with unprecedented capabilities
• •Fable 5 exceeds the performance of all previously released Anthropic models
• •Fixed session transcript saving failure when launching from VS Code integrated terminal
• •Sessions now properly appear in --resume flag after being launched from inherited shell environments
• •Update to v2.1.170 required to access Fable 5 model
• •Bug affected any shell inheriting Claude Code environment variables, not just VS Code

Concepts