Server-side:
- Add StructuredToolResult discriminated union type with command, file_write,
file_edit, file_read, and generic variants
- Implement buildStructuredToolResult in claude-agent.ts to detect tool types
and emit properly structured results
- Update codex-agent.ts to emit structured command results
Client-side:
- Add type guard and extraction functions for structured results
- Render tool calls based on result.type when available:
- command: show command, output, exit code
- file_write/file_edit: show diff viewer with proper +/- format
- file_read: show file content
- generic: show raw JSON
- Fall back to heuristic parsing for backwards compatibility
This fixes file writes showing as "Command: success message" - they now
properly show as diffs with +line additions.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
