build: add vscode ext install script

.devcontainer/devcontainer.json

@@ -7,9 +7,6 @@
 	"features": {
 		"ghcr.io/devcontainers/features/git:1": {},
 		"ghcr.io/devcontainers/features/github-cli:1": {},
-		"ghcr.io/devcontainers/features/docker-in-docker:2": {
-			"moby": false
-		},
 		"ghcr.io/tailscale/codespace/tailscale": {
 			"version": "latest"
 		},
@@ -18,19 +15,14 @@
 			"golangciLintVersion": "2.6.1"
 		}
 	},
-	"postCreateCommand": "./scripts/setup-git.sh",
+	"postCreateCommand": "./scripts/setup-git.sh && ./scripts/install-vscode-extensions.sh",
 	"customizations": {
 		"vscode": {
 			"extensions": [
 				"biomejs.biome",
 				"bradlc.vscode-tailwindcss",
-				"ms-vscode.vscode-typescript-next",
-				"esbenp.prettier-vscode",
-				"ms-vscode.vscode-json",
-				"formulahendry.auto-rename-tag",
 				"christian-kohler.path-intellisense",
-				"ms-vscode.vscode-eslint",
-				"convex.convex-vscode"
+				"golang.go"
 			],
 			"settings": {
 				"editor.defaultFormatter": "biomejs.biome",

scripts/install-vscode-extensions.sh

@@ -0,0 +1,54 @@
+#!/bin/bash
+
+# Install VS Code extensions from devcontainer.json
+# This script reads extensions from the single source of truth
+
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+DEVCONTAINER_JSON="$SCRIPT_DIR/../.devcontainer/devcontainer.json"
+
+echo "Installing VS Code extensions from devcontainer.json..."
+
+if [ ! -f "$DEVCONTAINER_JSON" ]; then
+    echo "Error: devcontainer.json not found at $DEVCONTAINER_JSON"
+    exit 1
+fi
+
+# Use Bun to parse JSON and extract extensions
+EXTENSIONS=$(bun -e "
+const config = await Bun.file('$DEVCONTAINER_JSON').json();
+const extensions = config?.customizations?.vscode?.extensions ?? [];
+console.log(extensions.join('\n'));
+")
+
+if [ -z "$EXTENSIONS" ]; then
+    echo "No extensions found in devcontainer.json"
+    exit 0
+fi
+
+# Determine which CLI to use (code-server, cursor, or code)
+if command -v code-server &> /dev/null; then
+    CLI="code-server"
+elif command -v cursor &> /dev/null; then
+    CLI="cursor"
+elif command -v code &> /dev/null; then
+    CLI="code"
+else
+    echo "Warning: No VS Code CLI found (code-server, cursor, or code)"
+    echo "Extensions to install:"
+    echo "$EXTENSIONS"
+    exit 0
+fi
+
+echo "Using $CLI to install extensions..."
+
+# Install each extension
+echo "$EXTENSIONS" | while read -r ext; do
+    if [ -n "$ext" ]; then
+        echo "Installing: $ext"
+        $CLI --install-extension "$ext" 2>/dev/null || true
+    fi
+done
+
+echo "Extension installation complete!"