feat: add release notes for version 3.28.12 with bug fixes for Anthropic Sonnet 4.5 model ID and Bedrock 1M context checkbox

Author: hannesrudolph

docs/update-notes/index.md

@@ -20,6 +20,7 @@ image: /img/social-share.jpg
 ### Version 3.28
 
 *   [3.28](/update-notes/v3.28) (Combined)
+*   [3.28.12](/update-notes/v3.28.12) (2025-09-29)
 *   [3.28.11](/update-notes/v3.28.11) (2025-09-29)
 *   [3.28.10](/update-notes/v3.28.10) (2025-09-29)
 *   [3.28.9](/update-notes/v3.28.9) (2025-09-26)

docs/update-notes/v3.28.12.mdx

@@ -0,0 +1,21 @@
+---
+description: Fixes Anthropic Sonnet 4.5 model ID and adds Bedrock 1M context checkbox.
+keywords:
+  - roo code 3.28.12
+  - anthropic sonnet 4.5
+  - bedrock 1m context
+  - bug fixes
+image: /img/social-share.jpg
+---
+
+# Roo Code 3.28.12 Release Notes (2025-09-29)
+
+This release fixes the Anthropic Sonnet 4.5 model ID and adds Bedrock 1M context checkbox support.
+
+## Bug Fixes
+
+* **Anthropic Sonnet 4.5 Model ID**: Corrects the model ID to the official `claude-sonnet-4-5`, resolving API errors when using Claude Sonnet 4.5 ([#8384](https://github.com/RooCodeInc/Roo-Code/pull/8384))
+
+## QOL Improvements
+
+* **Bedrock 1M Context Checkbox**: Adds checkbox to enable 1M context window support for Claude Sonnet 4 and 4.5 on Bedrock, providing more flexibility for large-scale projects ([#8384](https://github.com/RooCodeInc/Roo-Code/pull/8384))

docs/update-notes/v3.28.mdx

@@ -97,6 +97,7 @@ This gives teams a higher-capacity OpenAI option without extra configuration.[#8
 * **Welcome screen Roo provider experiment**: Surfaces the Roo provider on the welcome screen (localized, with click telemetry) to speed up setup. ([#8317](https://github.com/RooCodeInc/Roo-Code/pull/8317))
 * **Cleaner prompts (no “thinking” tags)**: Removes `<thinking>` tags for cleaner output, fewer tokens, and better model compatibility; preserves the plain‑language rule to confirm tool success. ([#8319](https://github.com/RooCodeInc/Roo-Code/pull/8319))
 * **Simpler Requesty model refresh**: Removes an unnecessary warning when refreshing the Requesty models list so you can fetch new policies without leaving the screen. ([#7710](https://github.com/RooCodeInc/Roo-Code/pull/7710))
+* **Bedrock 1M Context Checkbox**: Adds checkbox to enable 1M context window support for Claude Sonnet 4 and 4.5 on Bedrock, providing more flexibility for large-scale projects ([#8384](https://github.com/RooCodeInc/Roo-Code/pull/8384))
 
 ## Bug Fixes
 
@@ -133,6 +134,7 @@ This gives teams a higher-capacity OpenAI option without extra configuration.[#8
 
 
 * **Tool‑use guidance clarity**: Clarifies the retry suggestion so the model selects the correct file‑reading step during apply‑diff retries, reducing failed file edits. ([#8315](https://github.com/RooCodeInc/Roo-Code/pull/8315))
+* **Anthropic Sonnet 4.5 Model ID**: Corrects the model ID to the official `claude-sonnet-4-5`, resolving API errors when using Claude Sonnet 4.5 ([#8384](https://github.com/RooCodeInc/Roo-Code/pull/8384))
 
 ## Provider Updates
 

sidebars.ts

@@ -223,6 +223,7 @@ const sidebars: SidebarsConfig = {
           label: '3.28',
           items: [
             { type: 'doc', id: 'update-notes/v3.28', label: '3.28 Combined' },
+            { type: 'doc', id: 'update-notes/v3.28.12', label: '3.28.12' },
             { type: 'doc', id: 'update-notes/v3.28.11', label: '3.28.11' },
             { type: 'doc', id: 'update-notes/v3.28.10', label: '3.28.10' },
             { type: 'doc', id: 'update-notes/v3.28.9', label: '3.28.9' },