From 0fbe8a5d500b6303d82299ce6b3822771b6db10d Mon Sep 17 00:00:00 2001
From: GitHub Actions <actions@github.com>
Date: Tue, 18 Aug 2026 13:57:13 +0000
Subject: [PATCH] Pre-release 0.51.181

---
 .github/workflows/auto-close-pr.yml | 21 ---------------------
 CHANGELOG.md                        | 12 ++++++++++++
 ReleaseNotes.md                     | 11 ++++-------
 3 files changed, 16 insertions(+), 28 deletions(-)
 delete mode 100644 .github/workflows/auto-close-pr.yml

diff --git a/.github/workflows/auto-close-pr.yml b/.github/workflows/auto-close-pr.yml
deleted file mode 100644
index 90beda84..00000000
--- a/.github/workflows/auto-close-pr.yml
+++ /dev/null
@@ -1,21 +0,0 @@
-name: Auto-close PR
-on:
-  pull_request_target:
-    types: [opened, reopened]
-
-jobs:
-  close:
-    name: Run
-    runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
-    steps:
-      - run: |
-          gh pr close ${{ github.event.pull_request.number }} --comment \
-          "At the moment we are not accepting contributions to the repository.
-
-          Feedback for GitHub Copilot for Xcode can be given in the [Copilot community discussions](https://github.com/github/CopilotForXcode/discussions)."
-        if: ${{ !(startsWith(github.head_ref, 'release/') && github.event.pull_request.head.repo.full_name == github.repository) }}
-        env:
-          GH_REPO: ${{ github.repository }}
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 42463f66..adf6cd23 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -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.
diff --git a/ReleaseNotes.md b/ReleaseNotes.md
index 3c922d4a..74afcc7a 100644
--- a/ReleaseNotes.md
+++ b/ReleaseNotes.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.