feat: add release notes for version 3.28.13 with bug fixes for Vertex AI and AWS Bedrock

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)
+*   [3.28.13](/update-notes/v3.28.13) (2025-09-29)
 *   [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)

docs/update-notes/v3.28.13.mdx

@@ -0,0 +1,18 @@
+---
+description: Fixes Vertex AI Sonnet 4.5 configuration and removes AWS Bedrock topP to improve reliability.
+keywords:
+  - roo code 3.28.13
+  - new features
+  - bug fixes
+image: /img/social-share.jpg
+---
+
+# Roo Code 3.28.13 Release Notes (2025-09-29)
+
+This patch improves provider reliability: Vertex AI Sonnet 4.5 now works with the correct model ID and AWS Bedrock requests avoid conflicts by removing topP.
+
+
+## Bug Fixes
+
+* Vertex AI: Fix Sonnet 4.5 model configuration so requests no longer 404; sets the correct default ID and enables computer‑use via LiteLLM (thanks nickcatal!) ([#8391](https://github.com/RooCodeInc/Roo-Code/pull/8391))
+* AWS Bedrock: Remove topP parameter to avoid conflicts with extended thinking, improving reliability for streaming and non‑streaming responses (thanks ronyblum!) ([#8388](https://github.com/RooCodeInc/Roo-Code/pull/8388))

docs/update-notes/v3.28.mdx

@@ -136,6 +136,9 @@ 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))
 
+* **AWS Bedrock**: Removed `topP` parameter to avoid conflicts with extended thinking, improving reliability for streaming and non‑streaming responses (thanks ronyblum!) ([#8388](https://github.com/RooCodeInc/Roo-Code/pull/8388))
+* **Vertex AI**: Fixed Sonnet 4.5 model configuration to prevent 404s and align with the correct default model ID (thanks nickcatal!) ([#8391](https://github.com/RooCodeInc/Roo-Code/pull/8391))
+
 ## Provider Updates
 
 * **Claude 4.5 Sonnet**: Added support for Anthropic's latest Claude 4.5 Sonnet model across all providers (Anthropic, AWS Bedrock, Claude Code, Google Vertex AI, and OpenRouter) with 1M context window support ([#8368](https://github.com/RooCodeInc/Roo-Code/pull/8368))

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/v3.28.13', label: '3.28.13' },
             { 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' },