fix: update MCP configuration path in Antigravity module

Author: DevelopmentCats

registry/coder/modules/antigravity/README.md

@@ -8,7 +8,7 @@ tags: [ide, antigravity, ai]
 
 # Antigravity IDE
 
-Add a button to open any workspace with a single click in Antigravity IDE.
+Add a button to open any workspace with a single click in [Antigravity IDE](https://antigravity.google).
 
 Uses the [Coder Remote VS Code Extension](https://github.com/coder/vscode-coder).
 
@@ -37,7 +37,7 @@ module "antigravity" {
 
 ### Configure MCP servers for Antigravity
 
-Provide a JSON-encoded string via the `mcp` input. When set, the module writes the value to `~/.antigravity/mcp.json` using a `coder_script` on workspace start.
+Provide a JSON-encoded string via the `mcp` input. When set, the module writes the value to `~/.gemini/antigravity/mcp_config.json` using a `coder_script` on workspace start.
 
 The following example configures Antigravity to use the GitHub MCP server with authentication facilitated by the [`coder_external_auth`](https://coder.com/docs/admin/external-auth#configure-a-github-oauth-app) resource.
 

registry/coder/modules/antigravity/main.test.ts

@@ -91,7 +91,7 @@ describe("antigravity", async () => {
     expect(coder_app?.instances[0].attributes.order).toBe(22);
   });
 
-  it("writes ~/.antigravity/mcp.json when mcp provided", async () => {
+  it("writes ~/.gemini/antigravity/mcp_config.json when mcp provided", async () => {
     const id = await runContainer("alpine");
     try {
       const mcp = JSON.stringify({
@@ -114,7 +114,7 @@ describe("antigravity", async () => {
       expect(resp.exitCode).toBe(0);
       const content = await readFileContainer(
         id,
-        "/root/.antigravity/mcp.json",
+        "/root/.gemini/antigravity/mcp_config.json",
       );
       expect(content).toBe(mcp);
     } finally {

registry/coder/modules/antigravity/main.tf

@@ -52,7 +52,7 @@ variable "display_name" {
 
 variable "mcp" {
   type        = string
-  description = "JSON-encoded string to configure MCP servers for Antigravity. When set, writes ~/.antigravity/mcp.json."
+  description = "JSON-encoded string to configure MCP servers for Antigravity. When set, writes ~/.gemini/antigravity/mcp_config.json."
   default     = ""
 }
 
@@ -96,9 +96,9 @@ resource "coder_script" "antigravity_mcp" {
   script             = <<-EOT
     #!/bin/sh
     set -eu
-    mkdir -p "$HOME/.antigravity"
-    echo -n "${local.mcp_b64}" | base64 -d > "$HOME/.antigravity/mcp.json"
-    chmod 600 "$HOME/.antigravity/mcp.json"
+    mkdir -p "$HOME/.gemini/antigravity"
+    echo -n "${local.mcp_b64}" | base64 -d > "$HOME/.gemini/antigravity/mcp_config.json"
+    chmod 600 "$HOME/.gemini/antigravity/mcp_config.json"
   EOT
 }