Replace socket daemon with direct CDP WebSocket connection

Drops the Unix socket subprocess in favor of talking CDP directly over
WebSocket from the extension. Removes the protocol's send/health helpers,
simplifies setup to just verifying Chrome's remote debugging port, and
tightens types in dynamic-tools. Bumps Node engine to >=22 and adds the
ws dependency.

1 files changed, 16 insertions, 97 deletions

diff --git a/src/setup.ts b/src/setup.ts
index 839a540..f99e9d9 100644
--- a/src/setup.ts
+++ b/src/setup.ts
@@ -1,18 +1,15 @@
 /**
- * Setup command — guides the user through installing and connecting
- * browser-harness to their Chrome browser.
+ * Setup command — verifies Chrome is running with remote debugging
+ * and connects the pi agent to it.
  */
 
 import type { ExtensionAPI, ExtensionContext } from "@mariozechner/pi-coding-agent";
 import { execSync } from "node:child_process";
-import { existsSync } from "node:fs";
-import { homedir } from "node:os";
-import { join } from "node:path";
 import type { BrowserDaemon } from "./daemon";
 
 export function registerSetupCommand(pi: ExtensionAPI, daemon: BrowserDaemon): void {
   pi.registerCommand("browser-setup", {
-    description: "Install and connect browser-harness to Chrome",
+    description: "Connect pi to your Chrome browser",
     handler: async (_args, ctx) => {
       await runSetup(ctx, daemon);
     },
@@ -20,30 +17,9 @@ export function registerSetupCommand(pi: ExtensionAPI, daemon: BrowserDaemon): v
 }
 
 async function runSetup(ctx: ExtensionContext, daemon: BrowserDaemon): Promise<void> {
-  ctx.ui.notify("browser-harness setup: checking installation...", "info");
+  ctx.ui.notify("browser setup: checking Chrome...", "info");
 
-  // Step 1: Check for browser-harness installation
-  const bhInstalled = await checkBrowserHarnessInstalled();
-  if (!bhInstalled) {
-    ctx.ui.notify(
-      "browser-harness not found. Installing...",
-      "warning",
-    );
-    const installed = await installBrowserHarness(ctx);
-    if (!installed) {
-      ctx.ui.notify(
-        "Installation failed. Please install manually:\n" +
-          "  git clone https://github.com/browser-use/browser-harness ~/Developer/browser-harness\n" +
-          "  cd ~/Developer/browser-harness && uv sync",
-        "error",
-      );
-      return;
-    }
-  }
-
-  ctx.ui.notify("browser-harness found ✓", "info");
-
-  // Step 2: Check Chrome is running
+  // Step 1: Check Chrome is running
   const chromeRunning = checkChromeRunning();
   if (!chromeRunning) {
     ctx.ui.notify(
@@ -54,23 +30,26 @@ async function runSetup(ctx: ExtensionContext, daemon: BrowserDaemon): Promise<v
   }
   ctx.ui.notify("Chrome is running ✓", "info");
 
-  // Step 3: Try to start the daemon
-  ctx.ui.notify("Connecting to Chrome...", "info");
+  // Step 2: Try to connect to Chrome DevTools
+  ctx.ui.notify("Connecting to Chrome DevTools...", "info");
   try {
     await daemon.start();
-    ctx.ui.notify("Daemon connected ✓", "info");
+    ctx.ui.notify("Connected to Chrome ✓", "info");
   } catch (err) {
     const msg = err instanceof Error ? err.message : String(err);
     const lower = msg.toLowerCase();
 
     if (
       lower.includes("devtoolsactiveport") ||
-      lower.includes("remote debugging")
+      lower.includes("remote debugging") ||
+      lower.includes("econnrefused") ||
+      lower.includes("cannot reach chrome devtools")
     ) {
       ctx.ui.notify(
         "Chrome remote debugging needs to be enabled.\n\n" +
-          "Start Chrome with: --remote-debugging-port=9222\n" +
-          "Then run /browser-setup again.",
+          "Open chrome://inspect/#remote-debugging in your browser, tick the\n" +
+          "\"Discover network targets\" / Allow checkbox, then run /browser-setup again.\n\n" +
+          "Or set BU_CDP_WS to a remote browser WebSocket URL.",
         "warning",
       );
       return;
@@ -80,10 +59,10 @@ async function runSetup(ctx: ExtensionContext, daemon: BrowserDaemon): Promise<v
     return;
   }
 
-  // Step 4: Verify with test navigation
+  // Step 3: Verify with test navigation
   ctx.ui.notify("Testing browser control...", "info");
   try {
-    await daemon.newTab("https://github.com/browser-use/browser-harness");
+    await daemon.newTab("https://github.com");
     const info = await daemon.getPageInfo();
     if ("dialog" in info) {
       await daemon.cdp("Page.handleJavaScriptDialog", { accept: true });
@@ -100,66 +79,6 @@ async function runSetup(ctx: ExtensionContext, daemon: BrowserDaemon): Promise<v
   }
 }
 
-// ── Helpers ──────────────────────────────────────────────────────────────────
-
-async function checkBrowserHarnessInstalled(): Promise<boolean> {
-  const searchPaths = [
-    join(homedir(), "Developer", "browser-harness"),
-    join(homedir(), "src", "browser-harness"),
-    join(homedir(), "browser-harness"),
-    join(homedir(), "dev", "browser-harness"),
-    join(homedir(), "Projects", "browser-harness"),
-    process.cwd(),
-  ];
-
-  for (const dir of searchPaths) {
-    if (
-      existsSync(join(dir, "daemon.py")) &&
-      existsSync(join(dir, "helpers.py"))
-    ) {
-      return true;
-    }
-  }
-
-  // Check if uv tool is installed globally
-  try {
-    execSync("uv tool list 2>/dev/null | grep browser-harness", { timeout: 5000 });
-    return true;
-  } catch {
-    // not found via uv
-  }
-
-  return false;
-}
-
-async function installBrowserHarness(ctx: ExtensionContext): Promise<boolean> {
-  // Try uv tool install
-  try {
-    ctx.ui.notify("Installing browser-harness via uv...", "info");
-    execSync("uv tool install browser-harness", {
-      timeout: 60_000,
-      stdio: "pipe",
-    });
-    return true;
-  } catch {
-    // uv install failed
-  }
-
-  // Try git clone
-  try {
-    const targetDir = join(homedir(), "Developer", "browser-harness");
-    ctx.ui.notify(`Cloning browser-harness to ${targetDir}...`, "info");
-    execSync(
-      `git clone https://github.com/browser-use/browser-harness "${targetDir}"`,
-      { timeout: 30_000, stdio: "pipe" },
-    );
-    execSync("uv sync", { cwd: targetDir, timeout: 60_000, stdio: "pipe" });
-    return true;
-  } catch {
-    return false;
-  }
-}
-
 function checkChromeRunning(): boolean {
   try {
     if (process.platform === "darwin" || process.platform === "linux") {