Improvements

• Added support for 8192 output tokens from Claude Sonnet 3.5 (#16358; thanks rowillia)
• Reduced instances of over-generation when inserting docs or annotations above a symbol (#16333).
• Improved conformance with Anthropic Images in Chat Completions API (#16270).
• Adds support for Prompt Caching in Anthropic. For models that support it this can dramatically lower cost while improving performance (#16274; thanks rowillia).
• Workflows can now create new files in folders that didn't exist (#16251)

Bug Fixes

• repl: Fixed scaling of stdout/stderr line heights (#16308).
• Restored the ability to toggle the model selector in the Assistant via a keybinding (Preview only) (#16319).
• Restored the behavior of ctrl-a until we can separate the behavior of the command for soft wraps and leading indentation (Preview Only) (#16246).
• Fixed a bug where directories were often omitted from the completions for the /file slash command (#16242).
• Fixed detection of Python virtual environments (#15570, #15989; thanks vitallium).