From b6013f551d2efb44a60ee958f356aee1bcb332c9 Mon Sep 17 00:00:00 2001
From: "Builder.io" <builder-bot@builder.io>
Date: Wed, 25 Mar 2026 01:49:03 +0000
Subject: [PATCH] Update Builder CLI setup: rename fusion to builder, add curl
 install

---
 packages/core/src/client/AgentPanel.tsx             | 2 +-
 packages/core/src/client/terminal/AgentTerminal.tsx | 2 +-
 packages/core/src/terminal/cli-registry.ts          | 4 ++--
 packages/core/src/terminal/terminal-plugin.ts       | 7 ++++---
 packages/docs/app/routes/docs.harnesses.tsx         | 2 +-
 packages/harness-cli/client/App.tsx                 | 4 ++--
 packages/harness-cli/client/harnesses.ts            | 5 +++--
 packages/harness-cli/client/lib/config.ts           | 2 ++
 packages/harness-cli/src/utils.ts                   | 2 +-
 9 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/packages/core/src/client/AgentPanel.tsx b/packages/core/src/client/AgentPanel.tsx
index eca87055..ebdc690e 100644
--- a/packages/core/src/client/AgentPanel.tsx
+++ b/packages/core/src/client/AgentPanel.tsx
@@ -32,7 +32,7 @@ const AgentTerminal = lazy(() =>
 );
 
 const CLI_STORAGE_KEY = "agent-native-cli-command";
-const CLI_DEFAULT = "fusion";
+const CLI_DEFAULT = "builder";
 
 interface AvailableCli {
   command: string;
diff --git a/packages/core/src/client/terminal/AgentTerminal.tsx b/packages/core/src/client/terminal/AgentTerminal.tsx
index 9b6fb8b4..f9308c5c 100644
--- a/packages/core/src/client/terminal/AgentTerminal.tsx
+++ b/packages/core/src/client/terminal/AgentTerminal.tsx
@@ -19,7 +19,7 @@ import React, {
 import { getHarnessOrigin } from "../harness.js";
 
 export interface AgentTerminalProps {
-  /** CLI command to run. Default: 'fusion' */
+  /** CLI command to run. Default: 'builder' */
   command?: string;
   /** Additional CLI flags */
   flags?: string;
diff --git a/packages/core/src/terminal/cli-registry.ts b/packages/core/src/terminal/cli-registry.ts
index 4d302ace..9f7f8b6e 100644
--- a/packages/core/src/terminal/cli-registry.ts
+++ b/packages/core/src/terminal/cli-registry.ts
@@ -15,9 +15,9 @@ export interface CliEntry {
 }
 
 export const CLI_REGISTRY: Record<string, CliEntry> = {
-  fusion: {
+  builder: {
     label: "Builder.io",
-    installPackage: "@builder.io/fusion",
+    installPackage: "",
     stripEnv: [],
   },
   claude: {
diff --git a/packages/core/src/terminal/terminal-plugin.ts b/packages/core/src/terminal/terminal-plugin.ts
index b70d07a1..999e1ba2 100644
--- a/packages/core/src/terminal/terminal-plugin.ts
+++ b/packages/core/src/terminal/terminal-plugin.ts
@@ -11,7 +11,7 @@
 import { defineEventHandler } from "h3";
 
 export interface TerminalPluginOptions {
-  /** CLI command to run. Defaults to AGENT_CLI_COMMAND env or 'fusion' */
+  /** CLI command to run. Defaults to AGENT_CLI_COMMAND env or 'builder' */
   command?: string;
   /** Port for the WebSocket server. Defaults to AGENT_TERMINAL_PORT env or auto-assigned */
   port?: number;
@@ -73,14 +73,15 @@ export function createTerminalPlugin(options: TerminalPluginOptions = {}) {
         defineEventHandler(() => ({
           available: true,
           wsPort: existingPort ? parseInt(existingPort, 10) : 0,
-          command: options.command || process.env.AGENT_CLI_COMMAND || "claude",
+          command:
+            options.command || process.env.AGENT_CLI_COMMAND || "builder",
         })),
       );
       return;
     }
 
     const command =
-      options.command || process.env.AGENT_CLI_COMMAND || "fusion";
+      options.command || process.env.AGENT_CLI_COMMAND || "builder";
     const port =
       options.port ??
       (process.env.AGENT_TERMINAL_PORT
diff --git a/packages/docs/app/routes/docs.harnesses.tsx b/packages/docs/app/routes/docs.harnesses.tsx
index 457e2d0e..81834699 100644
--- a/packages/docs/app/routes/docs.harnesses.tsx
+++ b/packages/docs/app/routes/docs.harnesses.tsx
@@ -65,7 +65,7 @@ pnpm dev:harness`}
             ["Codex", "codex", "--full-auto, --quiet"],
             ["Gemini CLI", "gemini", "--sandbox"],
             ["OpenCode", "opencode", "—"],
-            ["Builder.io", "fusion", "—"],
+            ["Builder.io", "builder", "—"],
           ].map(([name, cmd, flags]) => (
             <tr key={cmd}>
               <td>{name}</td>
diff --git a/packages/harness-cli/client/App.tsx b/packages/harness-cli/client/App.tsx
index d5d50cc6..19a43a79 100644
--- a/packages/harness-cli/client/App.tsx
+++ b/packages/harness-cli/client/App.tsx
@@ -441,7 +441,7 @@ export function App() {
             <p className="text-xs text-white/50 leading-relaxed">
               Running{" "}
               <code className="bg-white/10 px-1.5 py-0.5 rounded text-[11px]">
-                npx --yes {config.installPackage}
+                {config.installCommand || `npx --yes ${config.installPackage}`}
               </code>
             </p>
             <p className="text-[11px] text-white/30 mt-3">
@@ -463,7 +463,7 @@ export function App() {
               Install manually:
             </p>
             <code className="block bg-white/10 px-3 py-2 rounded text-[11px] text-white/70 mt-2">
-              npx --yes {config.installPackage}
+              {config.installCommand || `npx --yes ${config.installPackage}`}
             </code>
             <button
               onClick={() => {
diff --git a/packages/harness-cli/client/harnesses.ts b/packages/harness-cli/client/harnesses.ts
index f77b5386..2bf0dfe0 100644
--- a/packages/harness-cli/client/harnesses.ts
+++ b/packages/harness-cli/client/harnesses.ts
@@ -79,8 +79,9 @@ export const opencodeConfig: HarnessConfig = {
 
 export const fusionConfig: HarnessConfig = {
   name: "Builder.io",
-  command: "fusion",
-  installPackage: "@builder.io/fusion",
+  command: "builder",
+  installPackage: "",
+  installCommand: "curl -fsSL https://www.builder.io/install.sh | bash",
   options: [],
   customPlaceholder: "e.g. --project my-project",
 };
diff --git a/packages/harness-cli/client/lib/config.ts b/packages/harness-cli/client/lib/config.ts
index 6a0a54f6..1406fcd4 100644
--- a/packages/harness-cli/client/lib/config.ts
+++ b/packages/harness-cli/client/lib/config.ts
@@ -16,6 +16,8 @@ export interface HarnessConfig {
   command: string;
   /** npm package to install, e.g. "@anthropic-ai/claude-code" */
   installPackage: string;
+  /** Override install command shown in the UI (e.g. a curl script). Falls back to npx --yes {installPackage} */
+  installCommand?: string;
   /** Toggle options shown in settings panel */
   options: HarnessOption[];
   /** Placeholder for custom flags input */
diff --git a/packages/harness-cli/src/utils.ts b/packages/harness-cli/src/utils.ts
index 7f87944c..ab9ca5b0 100644
--- a/packages/harness-cli/src/utils.ts
+++ b/packages/harness-cli/src/utils.ts
@@ -77,7 +77,7 @@ export function buildCliArgs(
       return ["--quiet", "--full-stdout", message];
     case "gemini":
       return ["--prompt", message];
-    case "fusion":
+    case "builder":
       return [message];
     default:
       return [message];