- Co-located tool renderers with their respective tool implementations across 14 tool modules.
- Added render-utils module with shared formatting helpers for diagnostics, diffs, paths, and metadata.
- Removed ~800 lines of inline renderer implementations from centralized renderers.ts file.
- Added Google Vertex AI provider with 11 Gemini model configurations.
- Added OpenAI Codex provider with 13 GPT-5 model configurations.