diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
index 79c4c3e..41d1fea 100644
--- a/.claude-plugin/plugin.json
+++ b/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "cloud-sql-sqlserver",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "Connect to Cloud SQL for SQL Server",
   "author": {
     "name": "Google LLC",
diff --git a/.codex-plugin/plugin.json b/.codex-plugin/plugin.json
index 8f937d4..d6be65a 100644
--- a/.codex-plugin/plugin.json
+++ b/.codex-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "cloud-sql-sqlserver",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "Connect to Cloud SQL for SQL Server",
   "author": {
     "name": "Google LLC",
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 10f3091..b06ba91 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.2.0"
+  ".": "0.2.1"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index d12bbf1..899550a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.2.1](https://github.com/gemini-cli-extensions/cloud-sql-sqlserver/compare/0.2.0...0.2.1) (2026-08-05)
+
+
+### Features
+
+* **plugin:** support agent plugin spec ([#124](https://github.com/gemini-cli-extensions/cloud-sql-sqlserver/issues/124)) ([9e4e899](https://github.com/gemini-cli-extensions/cloud-sql-sqlserver/commit/9e4e8990a4cd99ac39aac97189f8456a7fd10446))
+
 ## [0.2.0](https://github.com/gemini-cli-extensions/cloud-sql-sqlserver/compare/0.1.8...0.2.0) (2026-04-16)
 
 
diff --git a/README.md b/README.md
index 33bcb66..7cf5ea5 100644
--- a/README.md
+++ b/README.md
@@ -87,8 +87,8 @@ For the latest version, check the [releases page][releases].
 <summary id="antigravity">Antigravity</summary>
 
 You can use either of these two agents for Antigravity:
-- [Antigravity CLI](https://github.com/google-gemini/gemini-cli) version **v1.6.0** or higher
-- [Antigravity 2.0](https://antigravity.google/product/antigravity-2) version **v2.0.0** or higher.
+- [Antigravity CLI](https://github.com/google-gemini/gemini-cli) version **v0.2.1** or higher
+- [Antigravity 2.0](https://antigravity.google/product/antigravity-2) version **v0.2.1** or higher.
 
 <blockquote>
 💡 <strong>Tip — Migrating from Gemini CLI?</strong><br>
@@ -107,7 +107,7 @@ See <a href="https://antigravity.google/docs/gcli-migration">Migrating from Gemi
 **1. Clone the Repo:**
 
 ```bash
-git clone --branch 0.2.0 https://github.com/gemini-cli-extensions/cloud-sql-sqlserver.git
+git clone --branch 0.2.1 https://github.com/gemini-cli-extensions/cloud-sql-sqlserver.git
 ```
 
 **2. Install the skills:**
@@ -198,7 +198,7 @@ You can install skills using the `npx skills` command.
 Run the following command in your terminal to automatically download and register the skills:
 
 ```bash
-npx skills add https://github.com/gemini-cli-extensions/cloud-sql-sqlserver/tree/0.2.0
+npx skills add https://github.com/gemini-cli-extensions/cloud-sql-sqlserver/tree/0.2.1
 ```
 
 For detailed info check out the [Skills npm package](https://www.npmjs.com/package/skills).
diff --git a/gemini-extension.json b/gemini-extension.json
index c9f64fb..bdccdb3 100644
--- a/gemini-extension.json
+++ b/gemini-extension.json
@@ -1,6 +1,6 @@
 {
   "name": "cloud-sql-sqlserver",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "Connect to Cloud SQL for SQL Server",
   "contextFileName": "CLOUD-SQL-SQLSERVER.md",
   "settings": [
diff --git a/plugin.json b/plugin.json
index 8ed147d..521c276 100644
--- a/plugin.json
+++ b/plugin.json
@@ -1,7 +1,7 @@
 {
   "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
   "name": "cloud-sql-sqlserver",
-  "version": "0.2.0",
+  "version": "0.2.1",
   "description": "Connect to Cloud SQL for SQL Server",
   "author": {
     "name": "Google LLC",