diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
index 632b2a9..37e985c 100644
--- a/.claude-plugin/plugin.json
+++ b/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "spanner",
-  "version": "0.3.2",
+  "version": "0.3.3",
   "description": "Connect and interact with Spanner data using natural language.",
   "author": {
     "name": "Google LLC",
diff --git a/.codex-plugin/plugin.json b/.codex-plugin/plugin.json
index 3d46759..d4c1af7 100644
--- a/.codex-plugin/plugin.json
+++ b/.codex-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "spanner",
-  "version": "0.3.2",
+  "version": "0.3.3",
   "description": "Connect and interact with Spanner data using natural language.",
   "author": {
     "name": "Google LLC",
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index dbe5ddf..b0cf8d0 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "0.3.2"
+  ".": "0.3.3"
 }
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5c20beb..b4b1a73 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.3.3](https://github.com/gemini-cli-extensions/spanner/compare/0.3.2...0.3.3) (2026-08-03)
+
+
+### Features
+
+* **plugin:** support agent plugin spec ([#126](https://github.com/gemini-cli-extensions/spanner/issues/126)) ([265099e](https://github.com/gemini-cli-extensions/spanner/commit/265099e3554f127af821f17b22b924385d85e9b3))
+
 ## [0.3.2](https://github.com/gemini-cli-extensions/spanner/compare/0.3.1...0.3.2) (2026-07-10)
 
 
diff --git a/README.md b/README.md
index 6937620..4afb8bb 100644
--- a/README.md
+++ b/README.md
@@ -81,8 +81,8 @@ 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 **v0.3.2** or higher
-- [Antigravity 2.0](https://antigravity.google/product/antigravity-2) version **v0.3.2** or higher.
+- [Antigravity CLI](https://github.com/google-gemini/gemini-cli) version **v0.3.3** or higher
+- [Antigravity 2.0](https://antigravity.google/product/antigravity-2) version **v0.3.3** or higher.
 
 <blockquote>
 💡 <strong>Tip — Migrating from Gemini CLI?</strong><br>
@@ -101,7 +101,7 @@ See <a href="https://antigravity.google/docs/gcli-migration">Migrating from Gemi
 **1. Clone the Repo:**
 
 ```bash
-git clone --branch 0.3.2 https://github.com/gemini-cli-extensions/spanner.git
+git clone --branch 0.3.3 https://github.com/gemini-cli-extensions/spanner.git
 ```
 
 **2. Install the skills:**
@@ -192,7 +192,7 @@ 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/spanner/tree/0.3.2
+npx skills add https://github.com/gemini-cli-extensions/spanner/tree/0.3.3
 ```
 
 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 cee96b0..96f79cd 100644
--- a/gemini-extension.json
+++ b/gemini-extension.json
@@ -1,6 +1,6 @@
 {
   "name": "spanner",
-  "version": "0.3.2",
+  "version": "0.3.3",
   "description": "Connect and interact with Spanner data using natural language.",
   "contextFileName": "SPANNER.md",
   "settings": [
diff --git a/plugin.json b/plugin.json
index 2ae7a79..a94daec 100644
--- a/plugin.json
+++ b/plugin.json
@@ -1,7 +1,7 @@
 {
   "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
   "name": "spanner",
-  "version": "0.3.2",
+  "version": "0.3.3",
   "description": "Connect and interact with Spanner data using natural language.",
   "author": {
     "name": "Google LLC",