Agent Configuration
Each workspace runs its own Claude Code agent session. You can configure agent behavior per-workspace or set defaults for all new sessions.
Model Selection
Section titled “Model Selection”Select a model from the dropdown in the chat header. Available models:
| Model | ID | Description |
|---|---|---|
| Opus 4.6 1M | opus | Opus 4.6 with 1M context window |
| Opus 4.6 | claude-opus-4-6 | Standard Opus 4.6 |
| Sonnet 4.6 | sonnet | Fast and capable |
| Haiku 4.5 | haiku | Fastest, most affordable |
The model selection is per-workspace — you can use different models for different tasks.
Set the default model for new sessions in Settings > Models > Default model.
Reasoning Effort
Section titled “Reasoning Effort”Control how much reasoning the agent applies to each response:
| Level | Description | Available Models |
|---|---|---|
| Auto | Let Claude decide (default) | All models |
| Low | Fast, minimal reasoning | Opus, Sonnet |
| Medium | Balanced | Opus, Sonnet |
| High | Deep reasoning | Opus, Sonnet |
| Max | Maximum reasoning budget | Opus 4.6 only |
Select the effort level from the dropdown in the chat header, next to the model selector.
Set the default in Settings > Models > Default effort level.
Extended Thinking
Section titled “Extended Thinking”When enabled, the agent shows its reasoning process in expandable “thinking” blocks before its response.
- Toggle thinking: Enable/disable in the chat header toolbar
- Show/hide blocks: Even with thinking enabled, you can choose whether to display the thinking blocks in the chat UI
Set defaults in Settings > Models:
- Default thinking — enable/disable for new sessions
- Show thinking blocks — show/hide by default
Fast Mode
Section titled “Fast Mode”Fast mode prioritizes speed over depth. When enabled, the agent uses quicker, more concise responses.
Toggle fast mode in the chat header toolbar. Set the default in Settings > Models > Default fast mode.
Plan Mode
Section titled “Plan Mode”In plan mode, the agent outlines its approach before writing code. This is useful for complex tasks where you want to review the plan before execution.
- Toggle: Click the plan mode button in the chat header, or press
Shift + Tab - Default: Set in
Settings > Models > Default plan mode
When the agent produces a plan, you’ll see a plan approval prompt where you can approve, reject, or modify the plan before the agent proceeds.
File References (@-mentions)
Section titled “File References (@-mentions)”Type @ in the chat input to reference specific files in your workspace. A file picker appears showing matching files — select one to include it as context for the agent.
This is useful for directing the agent’s attention to specific files:
“Review the error handling in @src/api/handler.ts and suggest improvements”
Default Settings
Section titled “Default Settings”Configure defaults for all new sessions in Settings > Models:
| Setting | Description | Default |
|---|---|---|
| Default model | Model used for new chats | — |
| Default effort | Reasoning effort level | Auto |
| Default thinking | Enable thinking blocks | Off |
| Show thinking blocks | Display thinking in UI | Off |
| Default plan mode | Start in plan mode | Off |
| Default fast mode | Use fast mode | Off |