Pre-release 0.51.181

Author: actions-user

.github/workflows/auto-close-pr.yml

@@ -5,6 +5,18 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.51.0 - August 12, 2026
+### Added
+- Support for Kimi K3 through the updated Copilot language server.
+- Agent Client Protocol (ACP) plugin metadata for GitHub Copilot.
+
+### Changed
+- Updated the Copilot language server from 1.488.0 to 1.523.3.
+- Updated the ACP plugin to use Copilot CLI 1.0.78.
+
+### Fixed
+- Fixed model pricing tooltips for the latest token pricing metadata.
+
 ## 0.50.0 - May 20, 2026
 ### Added
 - Reasoning effort control for supported models: Low, Medium, or High from the model picker to balance response speed and quality.

CHANGELOG.md

@@ -1,13 +1,10 @@
-### GitHub Copilot for Xcode 0.50.0
+### GitHub Copilot for Xcode 0.51.0
 
 **🚀 Highlights**
 
-- **Reasoning Effort**: Control how deeply reasoning-capable models think before responding. You can now select reasoning efforts directly from the model picker for supported models, letting you balance response speed against answer quality.
-
-- **Bring Your Own Key (BYOK) is now Generally Available**: Bring Your Own Key support has graduated from preview and is now available to all users. Configure your own API keys for third-party models directly in Copilot for Xcode settings.
+- **Kimi K3 Support**: Added compatibility with Kimi K3 through an updated Copilot language server.
 
 **💪 Changes**
 
-- Added internal support for upcoming [usage-based billing](https://github.blog/news-insights/company-news/github-copilot-is-moving-to-usage-based-billing/), including billing updates for the usage panel, usage notifications, and model picker. This will be visible once usage-based billing rolls out.
-
-    We **strongly recommend** upgrading to this version as soon as possible.
+- Added Agent Client Protocol (ACP) plugin metadata for GitHub Copilot, including marketplace discovery and installation configuration.
+- Fixed model pricing tooltips so they correctly display token pricing from the latest model metadata.