File Browser & Editor

ChatML includes a built-in file browser and code editor so you can view and edit files without leaving the app.

File Tabs

Each session maintains its own set of open file tabs:

• Session-scoped — Tabs are independent per session
• LRU eviction — Oldest tabs are automatically closed when the limit is reached (default: 10)
• Pin support — Pin important tabs to prevent auto-closing
• Dirty detection — Modified files show an unsaved indicator

Code Editor

The editor is powered by Monaco (the same engine as VS Code):

• Syntax highlighting — Language-aware highlighting for all major languages
• File saving — Edit and save files directly (Cmd+S)
• Find and replace — Search within files (Cmd+F)
• Go to line — Jump to a specific line (Cmd+G)
• Undo/Redo — Standard undo (Cmd+Z) and redo (Cmd+Shift+Z)

Diff View

Toggle between viewing file content and viewing changes:

• Side-by-side diff — See the original and modified versions side by side
• Inline diff — See additions and removals inline
• Base branch comparison — Diffs are calculated against the session's base branch

Switch between file and diff view using the toggle in the editor toolbar or Cmd+Shift+D.

File Browser

The file explorer shows the session's worktree contents:

• Navigate the directory tree
• Open files in editor tabs
• View file change status (modified, added, deleted)

Toggle the file explorer with Cmd+Shift+E.