docs: update references to Sticky Models in usage and custom modes documentation

Author: hannesrudolph

docs/basic-usage/using-modes.md

@@ -2,8 +2,8 @@
 
 Modes in Roo Code are specialized personas that tailor the assistant's behavior to your current task. Each mode offers different capabilities, expertise, and access levels to help you accomplish specific goals.
 
-:::info Model Persistence
-Each mode remembers the last model you used with it. When switching modes, Roo automatically selects the model you previously set for that mode—allowing you to maintain different preferred models for different types of tasks without manual reconfiguration.
+:::info Sticky Models
+Each mode remembers your last-used model. When switching modes, Roo automatically selects that model—no manual selection needed. Assign different models to different tasks (Claude for Architect mode, GPT-4 for Code mode) and Roo will switch models automatically when you change modes.
 :::
 
 ## Why Use Different Modes?

docs/features/custom-modes.md

@@ -1,6 +1,6 @@
 # Custom Modes
 
-Roo Code allows you to create **custom modes** to tailor Roo's behavior to specific tasks or workflows. Custom modes can be either **global** (available across all projects) or **project-specific** (defined within a single project). Each mode—including custom ones—remembers the last model you used with it, automatically selecting that model when you switch to the mode. This lets you maintain different preferred models for different types of tasks without manual reconfiguration.
+Roo Code allows you to create **custom modes** to tailor Roo's behavior to specific tasks or workflows. Custom modes can be either **global** (available across all projects) or **project-specific** (defined within a single project). Each mode—including custom ones—features **Sticky Models**, automatically remembering and selecting the last model you used with it. This lets you assign different preferred models to different tasks without reconfiguration, as Roo switches between models when you change modes.
 
 :::info Mode-Specific Instruction File Locations
 You can provide instructions for custom modes using dedicated files or directories within your workspace. This allows for better organization and version control compared to only using the JSON `customInstructions` property.

docs/tips-and-tricks.md

@@ -15,3 +15,4 @@ A collection of quick tips to help you get the most out of Roo Code.
 - Add your own tips by clicking "Edit this page" below!
 - To manage large files and reduce context/resource usage, adjust the `File read auto-truncate threshold` setting. This setting controls the number of lines read from a file in one batch. Lower values can improve performance when working with very large files, but may require more read operations. You can find this setting in the Roo Code settings under 'Advanced Settings'.
 - Set up a keyboard shortcut for the [`roo.acceptInput` command](/features/keyboard-shortcuts) to accept suggestions or submit text input without using the mouse. Perfect for keyboard-focused workflows and reducing hand strain.
+- Use **Sticky Models** to assign specialized AI models to different modes (reasoning model for planning, non-reasoning model for coding). Roo automatically switches to each mode's last-used model without manual selection.