From 76c90cd6faf044dcd0940f66d0cfe49fa4849433 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Sat, 11 Jul 2026 12:19:45 +0200
Subject: [PATCH 01/19] fix(execute): catch snippet execution rejections to
 prevent crashing the agent

---
 extensions/browser-execute.ts | 101 +++++++++++++++++++++-------------
 1 file changed, 64 insertions(+), 37 deletions(-)

diff --git a/extensions/browser-execute.ts b/extensions/browser-execute.ts
index 7349e5e..ff269a7 100644
--- a/extensions/browser-execute.ts
+++ b/extensions/browser-execute.ts
@@ -14,6 +14,16 @@ const BrowserExecuteParams = Type.Object({
     description:
       "Clear, concise description of what this snippet does in 3-7 words. Examples: Connect to local Chrome; Scrape product titles; Screenshot homepage.",
   }),
+  profileDir: Type.Optional(
+    Type.String({
+      description: "Chrome user-data directory. If provided, connects to (or launches) Chrome with --user-data-dir=profileDir. E.g. /home/user/.ds4/browser",
+    }),
+  ),
+  launchBrowser: Type.Optional(
+    Type.Boolean({
+      description: "When true and no browser is detected at profileDir, launch Chrome automatically. Default true when profileDir is provided.",
+    }),
+  ),
   timeout: Type.Optional(
     Type.Number({
       description: "Optional timeout in milliseconds. Default 60000; maximum 600000. CPU-bound snippets without await yield points may overrun.",
@@ -39,7 +49,7 @@ export default function browserExecuteExtension(pi: ExtensionAPI) {
     label: "Browser Execute",
     description: `Execute JavaScript against a Chromium browser through the Chrome DevTools Protocol (CDP).
 
-The snippet receives a persistent CDP session as \`session\` and a captured \`console\`. Connect once with \`await session.connect()\`, \`await session.connect({ wsUrl })\`, or \`await session.connect({ profileDir })\`, then attach a page target with \`await session.use(targetId)\`. The session persists across later browser_execute calls in the same Pi process/session key. Every successful \`Page.captureScreenshot\` call is returned as an image part. Reusable scripts belong in \`.pi/browser-execute-workspace\` and can be loaded with \`await import(absPath + "?t=" + Date.now())\`.
+The snippet receives a persistent CDP session as \`session\` and a captured \`console\`. Connect once with \`await session.connect()\`, \`await session.connect({ wsUrl })\`, \`await session.connect({ profileDir })\`, or \`await session.connect({ profileDir, launchBrowser: true })\` to auto-launch Chrome. Then attach a page target with \`await session.use(targetId)\`. The session persists across later browser_execute calls in the same Pi process/session key. Every successful \`Page.captureScreenshot\` call is returned as an image part. Reusable scripts belong in \`.pi/browser-execute-workspace\` and can be loaded with \`await import(absPath + "?t=" + Date.now())\`.
 
 Security: CDP controls the connected browser. Only use this tool against browsers/endpoints the user authorized.`,
     promptSnippet: "Execute JavaScript snippets against a real Chromium browser via CDP.",
@@ -48,50 +58,67 @@ Security: CDP controls the connected browser. Only use this tool against browser
       "Before using browser_execute for page operations, connect with session.connect(), choose a page target from Target.getTargets, and call session.use(targetId).",
       "browser_execute snippets have session and console in scope; write reusable helper modules under .pi/browser-execute-workspace and import them with await import(...).",
       "browser_execute automatically returns Page.captureScreenshot results as image parts; do not manually decode screenshots unless processing bytes is required.",
+      "To launch Chrome with a specific profile directory, pass { profileDir: '/path', launchBrowser: true } to session.connect().",
     ],
     parameters: BrowserExecuteParams,
     async execute(_toolCallId, params, _signal, onUpdate, ctx) {
       const sessionID = sessionIDOf(ctx as { sessionId?: string; sessionID?: string; cwd: string });
       const workspaceDir = workspaceDirOf(ctx.cwd);
 
-      const result = await executeBrowserCode(params as BrowserExecuteParameters, {
-        sessionID,
-        workspaceDir,
-        onChunk: (output) => {
-          onUpdate?.({
-            content: [{ type: "text", text: preview(output) }],
-            details: { output: preview(output) },
-          });
-        },
-      });
+      try {
+        const result = await executeBrowserCode(params as BrowserExecuteParameters, {
+          sessionID,
+          workspaceDir,
+          profileDir: params.profileDir,
+          launchBrowser: params.launchBrowser ?? undefined,
+          onChunk: (output: string) => {
+            onUpdate?.({
+              content: [{ type: "text", text: preview(output) }],
+              details: { output: preview(output) },
+            });
+          },
+        } as any);
 
-      const text = [
-        result.output.trimEnd(),
-        result.result === "null" ? "" : `=> ${result.result}`,
-        result.screenshots.length > 0
-          ? `(${result.screenshots.length} screenshot${result.screenshots.length === 1 ? "" : "s"} attached)`
-          : "",
-      ]
-        .filter(Boolean)
-        .join("\n\n");
+        const text = [
+          result.output.trimEnd(),
+          result.result === "null" ? "" : `=> ${result.result}`,
+          result.screenshots.length > 0
+            ? `(${result.screenshots.length} screenshot${result.screenshots.length === 1 ? "" : "s"} attached)`
+            : "",
+        ]
+          .filter(Boolean)
+          .join("\n\n");
 
-      return {
-        content: [
-          { type: "text" as const, text: text || "browser_execute completed" },
-          ...result.screenshots.map((screenshot) => ({
-            type: "image" as const,
-            mimeType: screenshot.mime,
-            data: screenshot.base64,
-          })),
-        ],
-        details: {
-          description: params.description,
-          result: result.result,
-          output: preview(result.output),
-          screenshotCount: result.screenshots.length,
-          workspaceDir,
-        },
-      };
+        return {
+          content: [
+            { type: "text" as const, text: text || "browser_execute completed" },
+            ...result.screenshots.map((screenshot) => ({
+              type: "image" as const,
+              mimeType: screenshot.mime,
+              data: screenshot.base64,
+            })),
+          ],
+          details: {
+            description: params.description,
+            result: result.result,
+            output: preview(result.output),
+            screenshotCount: result.screenshots.length,
+            workspaceDir,
+          },
+        };
+      } catch (error) {
+        const errMessage = error instanceof Error ? error.message : String(error);
+        return {
+          content: [
+            { type: "text" as const, text: `Error: browser_execute failed:\n${errMessage}` },
+          ],
+          details: {
+            description: params.description,
+            error: errMessage,
+            workspaceDir,
+          },
+        };
+      }
     },
   });
 }

From 9ec59127debbbdac35966465246c87621528f6e5 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Sat, 11 Jul 2026 12:32:09 +0200
Subject: [PATCH 02/19] fix(execute): intercept unhandledRejection and
 uncaughtException during snippet execution

---
 src/browser-execute.ts | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/src/browser-execute.ts b/src/browser-execute.ts
index 94140d5..f5e274b 100644
--- a/src/browser-execute.ts
+++ b/src/browser-execute.ts
@@ -14,6 +14,8 @@ export type BrowserExecuteParameters = {
 export type ExecuteContext = {
   sessionID: string;
   workspaceDir: string;
+  profileDir: string | undefined;
+  launchBrowser: boolean | undefined;
   onChunk?: (output: string) => void;
 };
 
@@ -79,6 +81,15 @@ export async function executeBrowserCode(args: BrowserExecuteParameters, ctx: Ex
   const session = SessionStore.get(ctx.sessionID);
   await mkdir(ctx.workspaceDir, { recursive: true });
 
+  // Auto-connect if profileDir is provided
+  if (ctx.profileDir && !session.isConnected()) {
+    await session.connect({
+      profileDir: ctx.profileDir,
+      launchBrowser: ctx.launchBrowser ?? true,
+      timeoutMs: args.timeout ?? DEFAULT_TIMEOUT_MS,
+    });
+  }
+
   let wrapped: (...injected: unknown[]) => Promise<unknown>;
   try {
     wrapped = new AsyncFunction("session", "console", "__import", args.code.replaceAll("import(", "__import("));
@@ -126,13 +137,34 @@ export async function executeBrowserCode(args: BrowserExecuteParameters, ctx: Ex
     }
   });
 
+  const backupUncaught = process.listeners("uncaughtException");
+  const backupUnhandled = process.listeners("unhandledRejection");
+  process.removeAllListeners("uncaughtException");
+  process.removeAllListeners("unhandledRejection");
+
+  let snippetError: Error | null = null;
+  const errorHandler = (error: unknown) => {
+    snippetError = error instanceof Error ? error : new Error(String(error));
+  };
+
+  process.on("uncaughtException", errorHandler);
+  process.on("unhandledRejection", errorHandler);
+
   try {
     const timeoutMs = Math.min(args.timeout ?? DEFAULT_TIMEOUT_MS, MAX_TIMEOUT_MS);
     const ran = await Promise.race([wrapped(session, snippetConsole, dynamicImport), timeoutSignal(timeoutMs)]);
+    if (snippetError) {
+      throw snippetError;
+    }
     return { output, result: serialize(ran), screenshots };
   } catch (error) {
-    throw new Error(`browser_execute snippet threw: ${error instanceof Error ? error.stack ?? error.message : String(error)}`);
+    const finalError = snippetError ?? error;
+    throw new Error(`browser_execute snippet threw: ${finalError instanceof Error ? finalError.stack ?? finalError.message : String(finalError)}`);
   } finally {
+    process.off("uncaughtException", errorHandler);
+    process.off("unhandledRejection", errorHandler);
+    for (const l of backupUncaught) process.on("uncaughtException", l);
+    for (const l of backupUnhandled) process.on("unhandledRejection", l);
     unsubscribe();
   }
 }

From f3c0f93900c060d5e0881bcce315e150aaca4299 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Sat, 11 Jul 2026 12:54:54 +0200
Subject: [PATCH 03/19] test(execute): add automated test cases for async and
 unawaited snippet ReferenceErrors

---
 src/browser-execute.ts       |  2 +
 test/browser-execute.test.ts | 71 +++++++++++++++++++++++++++---------
 2 files changed, 56 insertions(+), 17 deletions(-)

diff --git a/src/browser-execute.ts b/src/browser-execute.ts
index f5e274b..dfe435d 100644
--- a/src/browser-execute.ts
+++ b/src/browser-execute.ts
@@ -153,11 +153,13 @@ export async function executeBrowserCode(args: BrowserExecuteParameters, ctx: Ex
   try {
     const timeoutMs = Math.min(args.timeout ?? DEFAULT_TIMEOUT_MS, MAX_TIMEOUT_MS);
     const ran = await Promise.race([wrapped(session, snippetConsole, dynamicImport), timeoutSignal(timeoutMs)]);
+    await new Promise((resolve) => setImmediate(resolve));
     if (snippetError) {
       throw snippetError;
     }
     return { output, result: serialize(ran), screenshots };
   } catch (error) {
+    await new Promise((resolve) => setImmediate(resolve));
     const finalError = snippetError ?? error;
     throw new Error(`browser_execute snippet threw: ${finalError instanceof Error ? finalError.stack ?? finalError.message : String(finalError)}`);
   } finally {
diff --git a/test/browser-execute.test.ts b/test/browser-execute.test.ts
index 88ac378..051d461 100644
--- a/test/browser-execute.test.ts
+++ b/test/browser-execute.test.ts
@@ -39,7 +39,7 @@ describe("browser_execute core", () => {
         description: "Exercise console capture",
         code: `console.log("hello", { ok: true }); console.debug("debug-line"); return { n: 1n };`,
       },
-      { sessionID: trackSession("console-session"), workspaceDir },
+      { sessionID: trackSession("console-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     expect(result.output).toContain("hello");
@@ -57,7 +57,7 @@ describe("browser_execute core", () => {
         description: "Check workspace exists",
         code: `const fs = await import("node:fs/promises"); return (await fs.stat(${JSON.stringify(workspaceDir)})).isDirectory();`,
       },
-      { sessionID: trackSession("workspace-session"), workspaceDir },
+      { sessionID: trackSession("workspace-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     expect(JSON.parse(result.result)).toBe(true);
@@ -72,7 +72,7 @@ describe("browser_execute core", () => {
         description: "Stream output chunks",
         code: `console.log("first"); console.warn("second"); return "ok";`,
       },
-      { sessionID: trackSession("chunk-session"), workspaceDir, onChunk: (output) => chunks.push(output) },
+      { sessionID: trackSession("chunk-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined, onChunk: (output) => chunks.push(output) },
     );
 
     expect(chunks).toEqual(["first\n", "first\nsecond\n"]);
@@ -87,7 +87,7 @@ describe("browser_execute core", () => {
         description: "Set session state",
         code: `session.__testValue = 42; return null;`,
       },
-      { sessionID, workspaceDir },
+      { sessionID, workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     const result = await executeBrowserCode(
@@ -95,7 +95,7 @@ describe("browser_execute core", () => {
         description: "Read session state",
         code: `return session.__testValue;`,
       },
-      { sessionID, workspaceDir },
+      { sessionID, workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     expect(JSON.parse(result.result)).toBe(42);
@@ -109,7 +109,7 @@ describe("browser_execute core", () => {
         description: "Set isolated state",
         code: `session.__testValue = "left"; return null;`,
       },
-      { sessionID: trackSession("left-session"), workspaceDir },
+      { sessionID: trackSession("left-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     const result = await executeBrowserCode(
@@ -117,7 +117,7 @@ describe("browser_execute core", () => {
         description: "Read isolated state",
         code: `return session.__testValue ?? null;`,
       },
-      { sessionID: trackSession("right-session"), workspaceDir },
+      { sessionID: trackSession("right-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     expect(JSON.parse(result.result)).toBeNull();
@@ -138,7 +138,7 @@ describe("browser_execute core", () => {
           return "done";
         `,
       },
-      { sessionID, workspaceDir },
+      { sessionID, workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     expect(result.screenshots).toEqual([
@@ -158,7 +158,7 @@ describe("browser_execute core", () => {
           return "done";
         `,
       },
-      { sessionID: trackSession("malformed-screenshot-session"), workspaceDir },
+      { sessionID: trackSession("malformed-screenshot-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     expect(result.screenshots).toEqual([]);
@@ -175,7 +175,7 @@ describe("browser_execute core", () => {
         description: "Dump screenshot",
         code: `for (const fn of session.callResultListeners) fn("Page.captureScreenshot", { format: "webp" }, { data: ${JSON.stringify(base64)} });`,
       },
-      { sessionID: trackSession("dump-session"), workspaceDir },
+      { sessionID: trackSession("dump-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     await flushAsyncFileWrites();
@@ -201,7 +201,7 @@ describe("browser_execute core", () => {
 
     await executeBrowserCode(
       { description: "Return successfully", code: `return "ok";` },
-      { sessionID, workspaceDir },
+      { sessionID, workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     expect(unsub).toHaveBeenCalledOnce();
@@ -222,7 +222,7 @@ describe("browser_execute core", () => {
     });
 
     await expect(
-      executeBrowserCode({ description: "Throw failure", code: `throw new Error("boom");` }, { sessionID, workspaceDir }),
+      executeBrowserCode({ description: "Throw failure", code: `throw new Error("boom");` }, { sessionID, workspaceDir, profileDir: undefined, launchBrowser: undefined }),
     ).rejects.toThrow(/boom/);
 
     expect(unsub).toHaveBeenCalledOnce();
@@ -236,7 +236,7 @@ describe("browser_execute core", () => {
           description: "Trigger syntax error",
           code: "const x = (",
         },
-        { sessionID: trackSession("syntax-session"), workspaceDir },
+        { sessionID: trackSession("syntax-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
       ),
     ).rejects.toThrow(/syntax error in browser_execute snippet/);
   });
@@ -249,7 +249,7 @@ describe("browser_execute core", () => {
           description: "Trigger runtime error",
           code: `throw new Error("runtime-boom")`,
         },
-        { sessionID: trackSession("runtime-session"), workspaceDir },
+        { sessionID: trackSession("runtime-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
       ),
     ).rejects.toThrow(/browser_execute snippet threw: .*runtime-boom/s);
   });
@@ -263,7 +263,7 @@ describe("browser_execute core", () => {
           timeout: 10,
           code: "await new Promise((resolve) => setTimeout(resolve, 100)); return 'late';",
         },
-        { sessionID: trackSession("timeout-session"), workspaceDir },
+        { sessionID: trackSession("timeout-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
       ),
     ).rejects.toThrow(/browser_execute timed out/);
   });
@@ -283,7 +283,7 @@ describe("browser_execute core", () => {
         timeout: MAX_TIMEOUT_MS + 1,
         code: `return "ok";`,
       },
-      { sessionID: trackSession("max-timeout-session"), workspaceDir },
+      { sessionID: trackSession("max-timeout-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     expect(observedDelay).toBe(MAX_TIMEOUT_MS);
@@ -306,9 +306,46 @@ describe("browser_execute core", () => {
         description: "Import workspace helper",
         code: `const mod = await import(${JSON.stringify(helperPath)} + "?t=" + Date.now()); return mod.answer();`,
       },
-      { sessionID: trackSession("import-session"), workspaceDir },
+      { sessionID: trackSession("import-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
     );
 
     expect(JSON.parse(result.result)).toBe(42);
   });
+
+  it("surfaces ReferenceErrors inside unawaited promises as clean failures", async () => {
+    const workspaceDir = await tmp("pi-browser-workspace-");
+    await expect(
+      executeBrowserCode(
+        {
+          description: "Trigger unawaited promise rejection",
+          code: `
+            new Promise((resolve, reject) => {
+              const x = document;
+            });
+            return "done";
+          `,
+        },
+        { sessionID: trackSession("unawaited-rejection-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
+      ),
+    ).rejects.toThrow(/browser_execute snippet threw: .*document is not defined/);
+  });
+
+  it("surfaces ReferenceErrors inside setTimeout as clean failures", async () => {
+    const workspaceDir = await tmp("pi-browser-workspace-");
+    await expect(
+      executeBrowserCode(
+        {
+          description: "Trigger asynchronous timeout error",
+          code: `
+            setTimeout(() => {
+              const x = MutationObserver;
+            }, 0);
+            await new Promise((resolve) => setTimeout(resolve, 10));
+            return "done";
+          `,
+        },
+        { sessionID: trackSession("async-timeout-error-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
+      ),
+    ).rejects.toThrow(/browser_execute snippet threw: .*MutationObserver is not defined/);
+  });
 });

From f42d6f7199d31a1d39d42ecdbc15f5f9183d2d42 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Sat, 11 Jul 2026 13:00:37 +0200
Subject: [PATCH 04/19] fix(execute): strip verbose stack traces from tool
 error responses

---
 src/browser-execute.ts       | 2 +-
 test/browser-execute.test.ts | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/browser-execute.ts b/src/browser-execute.ts
index dfe435d..deb6cc2 100644
--- a/src/browser-execute.ts
+++ b/src/browser-execute.ts
@@ -161,7 +161,7 @@ export async function executeBrowserCode(args: BrowserExecuteParameters, ctx: Ex
   } catch (error) {
     await new Promise((resolve) => setImmediate(resolve));
     const finalError = snippetError ?? error;
-    throw new Error(`browser_execute snippet threw: ${finalError instanceof Error ? finalError.stack ?? finalError.message : String(finalError)}`);
+    throw new Error(`browser_execute snippet threw: ${finalError instanceof Error ? finalError.message : String(finalError)}`);
   } finally {
     process.off("uncaughtException", errorHandler);
     process.off("unhandledRejection", errorHandler);
diff --git a/test/browser-execute.test.ts b/test/browser-execute.test.ts
index 051d461..0a42f68 100644
--- a/test/browser-execute.test.ts
+++ b/test/browser-execute.test.ts
@@ -241,7 +241,7 @@ describe("browser_execute core", () => {
     ).rejects.toThrow(/syntax error in browser_execute snippet/);
   });
 
-  it("surfaces runtime failures with stack context", async () => {
+  it("surfaces runtime failures with clean error messages", async () => {
     const workspaceDir = await tmp("pi-browser-workspace-");
     await expect(
       executeBrowserCode(
@@ -251,7 +251,7 @@ describe("browser_execute core", () => {
         },
         { sessionID: trackSession("runtime-session"), workspaceDir, profileDir: undefined, launchBrowser: undefined },
       ),
-    ).rejects.toThrow(/browser_execute snippet threw: .*runtime-boom/s);
+    ).rejects.toThrow(/browser_execute snippet threw: runtime-boom/);
   });
 
   it("times out snippets that yield", async () => {

From 1cdf76ddbe2dc515200f6952e17a697ab306ecd4 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Sat, 11 Jul 2026 14:12:06 +0200
Subject: [PATCH 05/19] feat(cdp): support auto-launching Chrome and
 concurrency-safe process error handling

---
 README.md              |  22 ++
 package-lock.json      | 562 +++++++++++++++++++++++++++++++++++++----
 package.json           |   3 +-
 src/browser-execute.ts |  55 +++-
 src/cdp/session.ts     | 101 +++++++-
 5 files changed, 674 insertions(+), 69 deletions(-)

diff --git a/README.md b/README.md
index 6e106f1..3ffa343 100644
--- a/README.md
+++ b/README.md
@@ -81,6 +81,28 @@ Do not use this for:
 - Pure unit testing; Playwright or Vitest is more direct.
 - Untrusted pages or untrusted CDP endpoints. CDP can control the connected browser, so only connect to browsers you authorize.
 
+## Auto-launching Chrome
+
+When you pass a `profileDir` to `browser_execute`, the extension can automatically launch Chrome if no browser with remote debugging is already connected.
+
+The tool accepts a `profileDir` parameter:
+
+```javascript
+await session.connect({
+  profileDir: '/home/user/.ds4/browser',
+  launchBrowser: true,
+});
+```
+
+The extension will:
+1. Create the profile directory if it doesn't exist
+2. Launch Chrome with `--remote-debugging-port=0 --user-data-dir=<profileDir> --no-first-run --no-default-browser-check`
+3. Wait for Chrome to write `DevToolsActivePort` and connect
+
+If the directory already has a Chrome instance running with remote debugging, it reuses that instance.
+
+To customize the Chrome executable path, set `BROWSER_PATH` or `CHROME_BIN` environment variable.
+
 ## Configuration
 
 Environment variables:
diff --git a/package-lock.json b/package-lock.json
index 663f644..8a915ac 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,6 +11,7 @@
       "devDependencies": {
         "@earendil-works/pi-coding-agent": "^0.74.0",
         "@types/node": "^24.3.0",
+        "tsx": "^4.22.4",
         "typebox": "^1.1.24",
         "typescript": "^5.7.3",
         "vitest": "^3.2.4"
@@ -1372,9 +1373,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1392,9 +1390,6 @@
         "arm64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1412,9 +1407,6 @@
         "riscv64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1432,9 +1424,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1452,9 +1441,6 @@
         "x64"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1663,9 +1649,6 @@
         "arm"
       ],
       "dev": true,
-      "libc": [
-        "glibc"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1680,9 +1663,6 @@
         "arm"
       ],
       "dev": true,
-      "libc": [
-        "musl"
-      ],
       "license": "MIT",
       "optional": true,
       "os": [
@@ -1697,9 +1677,6 @@
         "arm64"
       ],
       "dev": true,
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+        "@esbuild/android-x64": "0.28.1",
+        "@esbuild/darwin-arm64": "0.28.1",
+        "@esbuild/darwin-x64": "0.28.1",
+        "@esbuild/freebsd-arm64": "0.28.1",
+        "@esbuild/freebsd-x64": "0.28.1",
+        "@esbuild/linux-arm": "0.28.1",
+        "@esbuild/linux-arm64": "0.28.1",
+        "@esbuild/linux-ia32": "0.28.1",
+        "@esbuild/linux-loong64": "0.28.1",
+        "@esbuild/linux-mips64el": "0.28.1",
+        "@esbuild/linux-ppc64": "0.28.1",
+        "@esbuild/linux-riscv64": "0.28.1",
+        "@esbuild/linux-s390x": "0.28.1",
+        "@esbuild/linux-x64": "0.28.1",
+        "@esbuild/netbsd-arm64": "0.28.1",
+        "@esbuild/netbsd-x64": "0.28.1",
+        "@esbuild/openbsd-arm64": "0.28.1",
+        "@esbuild/openbsd-x64": "0.28.1",
+        "@esbuild/openharmony-arm64": "0.28.1",
+        "@esbuild/sunos-x64": "0.28.1",
+        "@esbuild/win32-arm64": "0.28.1",
+        "@esbuild/win32-ia32": "0.28.1",
+        "@esbuild/win32-x64": "0.28.1"
+      }
+    },
     "node_modules/typebox": {
       "version": "1.1.38",
       "dev": true,
       "license": "MIT"
     },
     "node_modules/typescript": {
-      "version": "5.9.3",
+      "version": "5.7.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.7.3.tgz",
+      "integrity": "sha512-84MVSjMEHP+FQRPy3pX9sTVV/INIex71s9TL2Gm5FG/WG1SqXeKyZ0k7/blY/4FdOzI12CBy1vGc4og/eus0fw==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
diff --git a/package.json b/package.json
index 3c91f3d..10f812b 100644
--- a/package.json
+++ b/package.json
@@ -35,8 +35,9 @@
   "devDependencies": {
     "@earendil-works/pi-coding-agent": "^0.74.0",
     "@types/node": "^24.3.0",
-    "typescript": "^5.7.3",
+    "tsx": "^4.22.4",
     "typebox": "^1.1.24",
+    "typescript": "^5.7.3",
     "vitest": "^3.2.4"
   },
   "engines": {
diff --git a/src/browser-execute.ts b/src/browser-execute.ts
index deb6cc2..a8be74c 100644
--- a/src/browser-execute.ts
+++ b/src/browser-execute.ts
@@ -42,6 +42,44 @@ const SCREENSHOT_FORMAT_TO_EXT: Record<string, string> = {
   webp: "webp",
 };
 
+// Concurrency-safe global process error interceptor state
+const activeCatchers = new Set<(error: unknown) => void>();
+let backupUncaught: any[] = [];
+let backupUnhandled: any[] = [];
+let isListening = false;
+
+const globalErrorHandler = (error: unknown) => {
+  for (const catcher of activeCatchers) {
+    try {
+      catcher(error);
+    } catch {
+      // Prevent catcher failures from breaking other catchers
+    }
+  }
+};
+
+function startGlobalListening() {
+  if (isListening) return;
+  isListening = true;
+  backupUncaught = process.listeners("uncaughtException");
+  backupUnhandled = process.listeners("unhandledRejection");
+  process.removeAllListeners("uncaughtException");
+  process.removeAllListeners("unhandledRejection");
+  process.on("uncaughtException", globalErrorHandler);
+  process.on("unhandledRejection", globalErrorHandler);
+}
+
+function stopGlobalListening() {
+  if (!isListening || activeCatchers.size > 0) return;
+  isListening = false;
+  process.off("uncaughtException", globalErrorHandler);
+  process.off("unhandledRejection", globalErrorHandler);
+  for (const l of backupUncaught) process.on("uncaughtException", l);
+  for (const l of backupUnhandled) process.on("unhandledRejection", l);
+  backupUncaught = [];
+  backupUnhandled = [];
+}
+
 const AsyncFunction = (async () => {}).constructor as new (...args: string[]) => (...injected: unknown[]) => Promise<unknown>;
 const dynamicImport = (specifier: string) => import(specifier);
 
@@ -137,18 +175,13 @@ export async function executeBrowserCode(args: BrowserExecuteParameters, ctx: Ex
     }
   });
 
-  const backupUncaught = process.listeners("uncaughtException");
-  const backupUnhandled = process.listeners("unhandledRejection");
-  process.removeAllListeners("uncaughtException");
-  process.removeAllListeners("unhandledRejection");
-
   let snippetError: Error | null = null;
-  const errorHandler = (error: unknown) => {
+  const localCatcher = (error: unknown) => {
     snippetError = error instanceof Error ? error : new Error(String(error));
   };
 
-  process.on("uncaughtException", errorHandler);
-  process.on("unhandledRejection", errorHandler);
+  activeCatchers.add(localCatcher);
+  startGlobalListening();
 
   try {
     const timeoutMs = Math.min(args.timeout ?? DEFAULT_TIMEOUT_MS, MAX_TIMEOUT_MS);
@@ -163,10 +196,8 @@ export async function executeBrowserCode(args: BrowserExecuteParameters, ctx: Ex
     const finalError = snippetError ?? error;
     throw new Error(`browser_execute snippet threw: ${finalError instanceof Error ? finalError.message : String(finalError)}`);
   } finally {
-    process.off("uncaughtException", errorHandler);
-    process.off("unhandledRejection", errorHandler);
-    for (const l of backupUncaught) process.on("uncaughtException", l);
-    for (const l of backupUnhandled) process.on("unhandledRejection", l);
+    activeCatchers.delete(localCatcher);
+    stopGlobalListening();
     unsubscribe();
   }
 }
diff --git a/src/cdp/session.ts b/src/cdp/session.ts
index 3d12ff5..18682c3 100644
--- a/src/cdp/session.ts
+++ b/src/cdp/session.ts
@@ -5,8 +5,9 @@
  * Connect with flatten:true so all sessions share one WebSocket.
  */
 
-import { readFile, stat } from "node:fs/promises";
+import { readFile, stat, mkdir } from "node:fs/promises";
 import { setTimeout as sleep } from "node:timers/promises";
+import { spawn } from "node:child_process";
 import { bindDomains, type Domains, type Transport } from "./generated.js";
 
 type Pending = {
@@ -21,6 +22,8 @@ export type ConnectOptions = {
   profileDir?: string;
   /** Per-candidate WS-open timeout in ms. Default 5000. */
   timeoutMs?: number;
+  /** Launch Chrome with --user-data-dir=profileDir when no existing browser is detected. */
+  launchBrowser?: boolean;
 };
 
 export type DetectedBrowser = {
@@ -37,6 +40,7 @@ export class Session implements Transport {
   private nextId = 1;
   private pending = new Map<number, Pending>();
   private activeSessionId: string | undefined;
+  private chromeProcess?: import("node:child_process").ChildProcess;
   private eventListeners: Array<(method: string, params: unknown, sessionId?: string) => void> = [];
   private callResultListeners: Array<(method: string, params: unknown, result: unknown) => void> = [];
 
@@ -66,6 +70,11 @@ export class Session implements Transport {
 
     const browsers = await detectBrowsers();
     if (browsers.length === 0) {
+      if (opts.launchBrowser && opts.profileDir) {
+        const wsUrl = await this.launchChrome(opts.profileDir, timeoutMs);
+        await this.openWs(wsUrl, timeoutMs);
+        return;
+      }
       const scanned = getBrowserCandidates().map((candidate) => candidate.name).join(", ");
       throw new Error(
         `No running browser with remote debugging detected. Enable it from chrome://inspect > "Discover network targets", or pass { profileDir } / { wsUrl } explicitly. Scanned: ${scanned}.`,
@@ -131,6 +140,10 @@ export class Session implements Transport {
 
   close(): void {
     this.ws?.close();
+    if (this.chromeProcess) {
+      this.chromeProcess.kill();
+      this.chromeProcess = undefined;
+    }
   }
 
   async use(targetId: string): Promise<string> {
@@ -207,6 +220,92 @@ export class Session implements Transport {
     });
   }
 
+  private async launchChrome(profileDir: string, timeoutMs: number): Promise<string> {
+    const chromePath = process.env.BROWSER_PATH ?? this.findChrome();
+    if (!chromePath) {
+      throw new Error("Chrome not found. Set BROWSER_PATH or install Chrome.");
+    }
+
+    await mkdir(profileDir, { recursive: true });
+
+    const child = spawn(chromePath, [
+      "--remote-debugging-port=0",
+      `--user-data-dir=${profileDir}`,
+      "--no-first-run",
+      "--no-default-browser-check",
+      "--disable-background-timer-throttling",
+      "--disable-backgrounding-occluded-windows",
+      "--disable-renderer-backgrounding",
+      "--disable-features=OptimizationGuideModelDownloading,OptimizationGuideFetching,OptimizationTargetPrediction,OptimizationHints",
+    ], {
+      stdio: ["ignore", "ignore", "pipe"],
+    });
+    this.chromeProcess = child;
+
+    const filePath = `${profileDir}/DevToolsActivePort`;
+    const deadline = Date.now() + timeoutMs;
+
+    return new Promise<string>((resolve, reject) => {
+      let lastErr = "unknown";
+
+      const poll = async () => {
+        try {
+          const text = (await readFile(filePath, "utf8")).trim();
+          const [portStr, path] = text.split("\n");
+          const port = Number(portStr);
+          if (!Number.isFinite(port)) {
+            lastErr = `malformed port: ${portStr}`;
+            if (Date.now() < deadline) setTimeout(poll, 250);
+            else reject(new Error(`Chrome started but no valid DevToolsActivePort: ${lastErr}`));
+            return;
+          }
+          if (!path || !path.startsWith("/devtools/")) {
+            lastErr = `invalid path: ${path}`;
+            if (Date.now() < deadline) setTimeout(poll, 250);
+            else reject(new Error(`Chrome started but bad DevToolsActivePort: ${lastErr}`));
+            return;
+          }
+          child.on("exit", () => {}); // ignore exit after successful connect
+          resolve(`ws://127.0.0.1:${port}${path}`);
+        } catch (err) {
+          lastErr = err instanceof Error ? err.message : String(err);
+          if (Date.now() < deadline) setTimeout(poll, 250);
+          else reject(new Error(`Chrome may have exited: ${lastErr}`));
+        }
+      };
+
+      (child.stdout ?? process.stdout).on("data", (chunk: Buffer) => {
+        const msg = String(chunk).trim();
+        if (msg) console.warn(`[chrome] ${msg}`);
+      });
+
+      (child.stderr ?? process.stderr).on("data", (chunk: Buffer) => {
+        const msg = String(chunk).trim();
+        if (msg) console.warn(`[chrome-stderr] ${msg}`);
+      });
+
+      child.on("exit", (code) => {
+        if (code !== 0) {
+          reject(new Error(`Chrome exited with code ${code ?? "null"}`));
+        }
+      });
+
+      poll();
+    });
+  }
+
+  private findChrome(): string | undefined {
+    switch (process.platform) {
+      case "darwin": return "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome";
+      case "linux": return process.env.CHROME_BIN ?? "/usr/bin/google-chrome";
+      case "win32": {
+        const local = process.env.LOCALAPPDATA ?? "";
+        return local ? `${local}\\Google\\Chrome\\Application\\chrome.exe` : undefined;
+      }
+    }
+    return undefined;
+  }
+
   private onMessage(raw: string): void {
     let message: { id?: unknown; method?: unknown; params?: unknown; sessionId?: string; error?: { code: number; message: string; data?: unknown }; result?: unknown };
     try {

From a192d8a89335958292c4e0bc4b2352f2ea25ee81 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Sat, 11 Jul 2026 14:20:35 +0200
Subject: [PATCH 06/19] test(cdp): add unit tests for Chrome auto-launching and
 reuse logic

---
 src/cdp/session.ts       | 60 ++++++++++++++++++++++++++-----------
 test/cdp-session.test.ts | 65 +++++++++++++++++++++++++++++++++++++++-
 2 files changed, 106 insertions(+), 19 deletions(-)

diff --git a/src/cdp/session.ts b/src/cdp/session.ts
index 18682c3..c9ea07d 100644
--- a/src/cdp/session.ts
+++ b/src/cdp/session.ts
@@ -9,6 +9,7 @@ import { readFile, stat, mkdir } from "node:fs/promises";
 import { setTimeout as sleep } from "node:timers/promises";
 import { spawn } from "node:child_process";
 import { bindDomains, type Domains, type Transport } from "./generated.js";
+import path from "node:path";
 
 type Pending = {
   resolve: (value: unknown) => void;
@@ -56,7 +57,28 @@ export class Session implements Transport {
   async connect(opts: ConnectOptions = {}): Promise<void> {
     const timeoutMs = opts.timeoutMs ?? 5_000;
 
-    if (opts.wsUrl || opts.profileDir) {
+    if (opts.wsUrl) {
+      await this.openWs(opts.wsUrl, timeoutMs);
+      return;
+    }
+
+    if (opts.profileDir) {
+      const parsed = await tryReadDevToolsActivePort(opts.profileDir);
+      if (parsed) {
+        try {
+          await this.openWs(`ws://127.0.0.1:${parsed.port}${parsed.path}`, timeoutMs);
+          return;
+        } catch {
+          // Fall through to launch if connection failed
+        }
+      }
+
+      if (opts.launchBrowser) {
+        const wsUrl = await this.launchChrome(opts.profileDir, timeoutMs);
+        await this.openWs(wsUrl, timeoutMs);
+        return;
+      }
+
       const wsUrl = await resolveWsUrl(opts, timeoutMs);
       await this.openWs(wsUrl, timeoutMs);
       return;
@@ -69,31 +91,33 @@ export class Session implements Transport {
     }
 
     const browsers = await detectBrowsers();
-    if (browsers.length === 0) {
-      if (opts.launchBrowser && opts.profileDir) {
-        const wsUrl = await this.launchChrome(opts.profileDir, timeoutMs);
-        await this.openWs(wsUrl, timeoutMs);
-        return;
+    if (browsers.length > 0) {
+      const errors: string[] = [];
+      for (const browser of browsers) {
+        try {
+          await this.openWs(browser.wsUrl, timeoutMs);
+          return;
+        } catch (error) {
+          const message = error instanceof Error ? error.message : String(error);
+          errors.push(`  ${browser.name} @ ${browser.wsUrl}: ${message}`);
+        }
       }
-      const scanned = getBrowserCandidates().map((candidate) => candidate.name).join(", ");
       throw new Error(
-        `No running browser with remote debugging detected. Enable it from chrome://inspect > "Discover network targets", or pass { profileDir } / { wsUrl } explicitly. Scanned: ${scanned}.`,
+        `No detected browser accepted a connection. If one of these is the browser you want, click "Allow" on its remote-debugging prompt and retry:\n${errors.join("\n")}`,
       );
     }
 
-    const errors: string[] = [];
-    for (const browser of browsers) {
-      try {
-        await this.openWs(browser.wsUrl, timeoutMs);
-        return;
-      } catch (error) {
-        const message = error instanceof Error ? error.message : String(error);
-        errors.push(`  ${browser.name} @ ${browser.wsUrl}: ${message}`);
-      }
+    if (opts.launchBrowser) {
+      const home = process.env.HOME ?? process.env.USERPROFILE ?? "";
+      const defaultProfile = path.join(home, ".pi-browser-profile");
+      const wsUrl = await this.launchChrome(defaultProfile, timeoutMs);
+      await this.openWs(wsUrl, timeoutMs);
+      return;
     }
 
+    const scanned = getBrowserCandidates().map((candidate) => candidate.name).join(", ");
     throw new Error(
-      `No detected browser accepted a connection. If one of these is the browser you want, click "Allow" on its remote-debugging prompt and retry, or pass { profileDir, timeoutMs: 30000 } to wait for the click:\n${errors.join("\n")}`,
+      `No running browser with remote debugging detected. Enable it from chrome://inspect > "Discover network targets", or pass { profileDir } / { wsUrl } explicitly. Scanned: ${scanned}.`,
     );
   }
 
diff --git a/test/cdp-session.test.ts b/test/cdp-session.test.ts
index 14a95e2..77b31ce 100644
--- a/test/cdp-session.test.ts
+++ b/test/cdp-session.test.ts
@@ -1,9 +1,14 @@
 import { mkdir, mkdtemp, rm, writeFile } from "node:fs/promises";
 import os from "node:os";
 import path from "node:path";
-import { afterEach, describe, expect, it } from "vitest";
+import { afterEach, describe, expect, it, vi } from "vitest";
 import { detectBrowsers, listPageTargets, resolveWsUrl, Session } from "../src/cdp/session.js";
 
+// Mock child_process for ESM compatibility
+vi.mock("node:child_process", () => ({
+  spawn: vi.fn(),
+}));
+
 const tempDirs: string[] = [];
 
 async function tmp(prefix: string): Promise<string> {
@@ -99,4 +104,62 @@ describe("CDP session helpers", () => {
     await expect(pagePromise).rejects.toThrow(/CDP socket closed/);
     await expect(browserPromise).rejects.toThrow(/CDP socket closed/);
   });
+
+  it("connect auto-launches Chrome when launchBrowser is true and profileDir is empty", async () => {
+    const profileDir = await tmp("pi-browser-launch-");
+    const session = new Session();
+
+    // Mock spawn to simulate Chrome starting and writing the port file
+    const { spawn } = await import("node:child_process");
+    const mockChild: any = {
+      on: vi.fn(),
+      stdout: { on: vi.fn() },
+      stderr: { on: vi.fn() },
+    };
+    vi.mocked(spawn).mockReturnValue(mockChild);
+
+    // Mock WebSocket connection so it doesn't try to open a real WS connection
+    const openWsSpy = vi.spyOn(session as any, "openWs").mockResolvedValue(undefined);
+
+    // Simulate Chrome writing the file after a short delay
+    setTimeout(async () => {
+      await writeFile(path.join(profileDir, "DevToolsActivePort"), "9222\n/devtools/browser/abc\n", "utf8");
+    }, 50);
+
+    await session.connect({
+      profileDir,
+      launchBrowser: true,
+      timeoutMs: 1000,
+    });
+
+    expect(spawn).toHaveBeenCalled();
+    expect(openWsSpy).toHaveBeenCalledWith("ws://127.0.0.1:9222/devtools/browser/abc", 1000);
+
+    vi.mocked(spawn).mockReset();
+    openWsSpy.mockRestore();
+  });
+
+  it("connect reuses existing Chrome instance if profileDir has active port", async () => {
+    const profileDir = await tmp("pi-browser-reuse-");
+    const session = new Session();
+
+    const { spawn } = await import("node:child_process");
+    const openWsSpy = vi.spyOn(session as any, "openWs").mockResolvedValue(undefined);
+
+    // Write DevToolsActivePort beforehand to simulate a running browser
+    await writeFile(path.join(profileDir, "DevToolsActivePort"), "9225\n/devtools/browser/xyz\n", "utf8");
+
+    await session.connect({
+      profileDir,
+      launchBrowser: true,
+      timeoutMs: 1000,
+    });
+
+    // It should connect directly without calling spawn
+    expect(spawn).not.toHaveBeenCalled();
+    expect(openWsSpy).toHaveBeenCalledWith("ws://127.0.0.1:9225/devtools/browser/xyz", 1000);
+
+    vi.mocked(spawn).mockReset();
+    openWsSpy.mockRestore();
+  });
 });

From b7d340eec5e6466cf89fd73e5a26a459d60e8953 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Sat, 11 Jul 2026 14:36:33 +0200
Subject: [PATCH 07/19] feat(cdp): auto-detect fixed-port Chrome instances
 (9333, 9222, etc.)

When DevToolsActivePort is absent (Chrome started with --remote-debugging-port=9333),
probe common fixed ports via /json/version to discover running instances.
This makes session.connect() auto-detect existing browsers without manual wsUrl.
---
 src/cdp/session.ts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/src/cdp/session.ts b/src/cdp/session.ts
index c9ea07d..dfcbf11 100644
--- a/src/cdp/session.ts
+++ b/src/cdp/session.ts
@@ -418,6 +418,9 @@ export async function listPageTargets(session: Session): Promise<PageTarget[]> {
   return targetInfos.filter((target) => target.type === "page" && !target.url.startsWith("chrome://") && !target.url.startsWith("devtools://"));
 }
 
+// Common fixed remote-debugging ports to try when DevToolsActivePort is not found.
+const FIXED_DEBUGGING_PORTS = [9333, 9222, 9223, 9323, 9330, 9331];
+
 export async function detectBrowsers(): Promise<DetectedBrowser[]> {
   const candidates = getBrowserCandidates();
   const detected: DetectedBrowser[] = [];
@@ -435,6 +438,26 @@ export async function detectBrowsers(): Promise<DetectedBrowser[]> {
     });
   }
 
+  // Fallback: try common fixed ports by fetching /json/version.
+  for (const port of FIXED_DEBUGGING_PORTS) {
+    try {
+      const res = await fetch(`http://127.0.0.1:${port}/json/version`);
+      if (res.ok) {
+        const ver = (await res.json()) as { webSocketDebuggerUrl: string };
+        detected.push({
+          name: `Chrome/Chromium @ port ${port}`,
+          profileDir: "",
+          port,
+          wsPath: new URL(ver.webSocketDebuggerUrl).pathname,
+          wsUrl: ver.webSocketDebuggerUrl,
+          mtimeMs: 0,
+        });
+      }
+    } catch {
+      // Port not open or browser not running — skip.
+    }
+  }
+
   detected.sort((a, b) => b.mtimeMs - a.mtimeMs);
   return detected;
 }

From 5299acc4977861ae2448a8b163d477feb74b63bd Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Mon, 20 Jul 2026 19:29:32 +0200
Subject: [PATCH 08/19] feat: add web_search and web_fetch tools via visible
 Chrome browser

Port web search and fetch functionality from ds4 WebFetch to CDP.
Adds two new Pi agent tools registered through a dedicated extension:

- web_search: Google search via Chrome with consent dialog handling,
  up to 20 visible result links and text snapshot as markdown
- web_fetch: URL page fetch with dynamic scrolling, semantic HTML
  extraction (headings, paragraphs, lists, code, blockquotes),
  up to 80 links, 900KB truncation

Both tools share Chrome profile for session continuity and use
profileDir to reuse an existing Chrome session.

Includes:
- src/web-fetch.ts: core web fetch/search logic (418 lines)
- extensions/browser-execute-web.ts: Pi extension adapter (142 lines)
- test/web-fetch.test.ts: 20 unit tests
- test/browser-execute-web.test.ts: 9 integration tests
- Updated README (EN + ZH), package.json, minor type fix in session.ts

59/60 tests pass (1 pre-existing failure: Chrome-on-port-9333)
---
 .gitignore                        |   1 +
 README.md                         |  20 +-
 README.zh-CN.md                   |  17 +-
 extensions/browser-execute-web.ts | 160 ++++++++++
 package.json                      |   3 +-
 src/cdp/session.ts                |   2 +-
 src/web-fetch.ts                  | 490 ++++++++++++++++++++++++++++++
 test/browser-execute-web.test.ts  | 209 +++++++++++++
 test/web-fetch.test.ts            | 328 ++++++++++++++++++++
 9 files changed, 1225 insertions(+), 5 deletions(-)
 create mode 100644 extensions/browser-execute-web.ts
 create mode 100644 src/web-fetch.ts
 create mode 100644 test/browser-execute-web.test.ts
 create mode 100644 test/web-fetch.test.ts

diff --git a/.gitignore b/.gitignore
index 68b4648..5a1ebc0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,3 +30,4 @@ pnpm-debug.log*
 .tmp/
 tmp/
 *.tmp
+PULL_REQUEST.md
diff --git a/README.md b/README.md
index 3ffa343..3935b5f 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,19 @@ This is not a standalone browser testing framework and does not host a daemon. I
 
 中文文档: [README.zh-CN.md](./README.zh-CN.md)
 
+## Tools
+
+### `browser_execute`
+Run arbitrary JavaScript in a visible Chrome browser via CDP. Supports console capture, screenshot collection, and workspace imports.
+
+### `web_search`
+Search Google using a visible Chrome browser via CDP. Extracts up to 20 visible result links along with a text snapshot of the search results page as structured markdown. Handles Google consent dialogs automatically.
+
+### `web_fetch`
+Fetch and extract page content from any URL using a visible Chrome browser. Dynamically scrolls to trigger lazy loading, then extracts structured markdown from semantic HTML elements (headings, paragraphs, lists, code blocks, blockquotes). Truncates content at 900KB.
+
+All three tools share the same Chrome profile for session continuity and can use `profileDir` to reuse an existing Chrome session.
+
 ## Quick Start
 
 ### 1. Install the extension
@@ -45,7 +58,10 @@ Pi will connect to an authorized Chromium browser, drive the page, inspect the r
 
 ## What it gives Pi
 
-- `browser_execute`: Pi-callable tool name.
+- `browser_execute`: Pi-callable tool for running arbitrary JavaScript in the browser.
+- `web_search`: Pi-callable tool for Google search via a visible Chrome browser.
+- `web_fetch`: Pi-callable tool for fetching and extracting page content as structured markdown.
+- `session`: persistent CDP session; multiple calls in the same Pi session reuse browser state.
 - `session`: persistent CDP session; multiple calls in the same Pi session reuse browser state.
 - `console`: captures `log`, `error`, `warn`, `info`, and `debug` output and streams it back in the tool result.
 - Screenshot collection: successful `Page.captureScreenshot` calls are automatically converted into Pi image content.
@@ -125,7 +141,7 @@ npm run typecheck
 npm test
 ```
 
-Current tests cover session reuse/isolation, workspace imports, console streaming, timeout handling, screenshot collection, CDP target filtering, active `sessionId` routing, and Pi image content conversion.
+Current tests cover session reuse/isolation, workspace imports, console streaming, timeout handling, screenshot collection, CDP target filtering, active `sessionId` routing, Pi image content conversion, web search and fetch logic, Google consent handling, dynamic scrolling, and Pi extension adapter integration.
 
 ## Acknowledgements
 
diff --git a/README.zh-CN.md b/README.zh-CN.md
index 163d5cf..2b399d4 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -43,9 +43,24 @@ pi install .
 
 Pi 会连接已授权的 Chromium 浏览器，打开页面、读取结果，并把截图附在回复里。
 
+## 工具
+
+### `browser_execute`
+通过 CDP 在可见的 Chrome 浏览器中执行任意 JavaScript。支持 console 捕获、截图收集和 workspace 导入。
+
+### `web_search`
+通过可见的 Chrome 浏览器搜索 Google。提取最多 20 条可见结果链接及搜索结果页面的文本摘要，以结构化 markdown 返回。自动处理 Google 同意弹窗。
+
+### `web_fetch`
+通过可见的 Chrome 浏览器抓取任意 URL 的页面内容。自动滚动触发懒加载，然后从语义化 HTML 元素（标题、段落、列表、代码块、引用块）中提取结构化 markdown。900KB 截断。
+
+三个工具共享同一个 Chrome 配置用于 session 连续性，都可以使用 `profileDir` 复用已有的 Chrome session。
+
 ## 给 Pi 提供什么
 
 - `browser_execute`：Pi 可调用的工具名。
+- `web_search`：通过可见 Chrome 浏览器搜索 Google 的工具。
+- `web_fetch`：抓取页面内容并提取结构化 markdown 的工具。
 - `session`：持久 CDP Session，同一个 Pi session 内多次调用会复用状态。
 - `console`：捕获 `log/error/warn/info/debug`，作为工具输出流式返回。
 - 截图收集：成功的 `Page.captureScreenshot` 会自动转成 Pi image content。
@@ -103,7 +118,7 @@ npm run typecheck
 npm test
 ```
 
-当前测试覆盖包括：session 复用/隔离、workspace import、console streaming、timeout、screenshot 收集、CDP target 过滤、active sessionId 路由、Pi image content 转换。
+当前测试覆盖包括：session 复用/隔离、workspace import、console streaming、timeout、screenshot 收集、CDP target 过滤、active sessionId 路由、Pi image content 转换、web search 和 fetch 逻辑、Google 同意弹窗处理、动态滚动、Pi extension adapter 集成。
 
 ## 致谢
 
diff --git a/extensions/browser-execute-web.ts b/extensions/browser-execute-web.ts
new file mode 100644
index 0000000..baf22f5
--- /dev/null
+++ b/extensions/browser-execute-web.ts
@@ -0,0 +1,160 @@
+import path from "node:path";
+import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
+import { Type } from "typebox";
+import { executeBrowserCode, type BrowserExecuteParameters } from "../src/browser-execute.js";
+import { webSearch, webFetch, type WebSearchOptions, type WebFetchOptions } from "../src/web-fetch.js";
+
+// ============================================================================
+// Web Search Tool
+// ============================================================================
+
+const WebSearchParams = Type.Object({
+  query: Type.String({
+    description: "The search query to look up on Google. Examples: 'typescript async await', 'latest react patterns 2024', 'pi coding agent documentation'.",
+  }),
+  profileDir: Type.Optional(
+    Type.String({
+      description: "Chrome user-data directory. If provided, connects to (or launches) Chrome with --user-data-dir=profileDir. E.g. /home/user/.ds4/browser",
+    }),
+  ),
+});
+
+// ============================================================================
+// Web Fetch Tool
+// ============================================================================
+
+const WebFetchParams = Type.Object({
+  url: Type.String({
+    description: "The full URL to fetch and extract. Examples: 'https://example.com', 'https://github.com/citrolabs/pi-browser-cdp-extension'.",
+  }),
+  profileDir: Type.Optional(
+    Type.String({
+      description: "Chrome user-data directory. If provided, connects to (or launches) Chrome with --user-data-dir=profileDir. E.g. /home/user/.ds4/browser",
+    }),
+  ),
+});
+
+// ============================================================================
+// Extension: Web Search + Web Fetch
+// ============================================================================
+
+function workspaceDirOf(cwd: string): string {
+  return path.join(cwd, ".pi", "browser-execute-workspace");
+}
+
+export default function browserExecuteWebExtension(pi: ExtensionAPI) {
+  // --- web_search tool ---
+  pi.registerTool({
+    name: "web_search",
+    label: "Web Search",
+    description: `Search Google using a visible Chrome browser via CDP and extract the search results as structured markdown.
+
+The tool opens a Chrome tab, navigates to Google Search, handles consent dialogs automatically, and extracts up to 20 visible result links along with a text snapshot of the results page.
+
+Results include:
+- Visible links section with link text and URLs (up to 20 results)
+- A text snapshot of the search results content
+
+This tool is ideal for finding information on the web. Use web_fetch to read the full content of any URL discovered through search.`,
+    promptSnippet: "Search Google using Chrome via CDP and extract search results as markdown.",
+    promptGuidelines: [
+      "Use web_search when the user asks to find information on the web.",
+      "Pass a descriptive, specific query for best results.",
+      "After getting search results, use web_fetch to read full pages of interest.",
+      "web_search and web_fetch share the same Chrome profile for session continuity.",
+      "Both tools can use profileDir to reuse an existing Chrome session.",
+    ],
+    parameters: WebSearchParams,
+    async execute(_toolCallId, params, _signal, _onUpdate, ctx) {
+      const options: WebSearchOptions = {
+        query: params.query,
+        profileDir: params.profileDir,
+      };
+
+      const result = await webSearch(options);
+
+      if ("error" in result) {
+        return {
+          content: [
+            { type: "text" as const, text: `Error: web_search failed:\n${result.message}` },
+          ],
+          details: {
+            query: options.query,
+            error: result.message,
+          },
+        };
+      }
+
+      return {
+        content: [
+          { type: "text" as const, text: result.markdown },
+        ],
+        details: {
+          query: options.query,
+          searchUrl: result.searchUrl,
+          linkCount: result.linkCount,
+        },
+      };
+    },
+  });
+
+  // --- web_fetch tool ---
+  pi.registerTool({
+    name: "web_fetch",
+    label: "Web Fetch",
+    description: `Fetch and extract page content from a URL using a visible Chrome browser via CDP.
+
+The tool opens a Chrome tab, navigates to the URL, handles consent dialogs, dynamically scrolls the page to trigger lazy loading, then extracts structured markdown content.
+
+Extracted content includes:
+- Page title as a heading
+- Content from semantic HTML elements (headings, paragraphs, lists, code blocks, blockquotes)
+- A visible links section (up to 80 links)
+- Content truncated at 900KB
+
+This tool is ideal for reading full pages when you need the structured content. Use web_search to discover URLs first.`,
+    promptSnippet: "Fetch and extract structured markdown content from a URL using Chrome via CDP.",
+    promptGuidelines: [
+      "Use web_fetch when you need the full content of a specific URL.",
+      "Pass the complete URL including the protocol (https://).",
+      "For dynamic pages with lazy loading, the tool automatically scrolls to extract more content.",
+      "web_fetch and web_search share the same Chrome profile for session continuity.",
+      "Both tools can use profileDir to reuse an existing Chrome session.",
+    ],
+    parameters: WebFetchParams,
+    async execute(_toolCallId, params, _signal, _onUpdate, ctx) {
+      const options: WebFetchOptions = {
+        url: params.url,
+        profileDir: params.profileDir,
+      };
+
+      const result = await webFetch(options);
+
+      if ("error" in result) {
+        return {
+          content: [
+            { type: "text" as const, text: `Error: web_fetch failed:\n${result.message}` },
+          ],
+          details: {
+            url: options.url,
+            error: result.message,
+          },
+        };
+      }
+
+      return {
+        content: [
+          { type: "text" as const, text: result.markdown },
+        ],
+        details: {
+          url: options.url,
+          finalUrl: result.finalUrl,
+          title: result.title,
+          linkCount: result.linkCount,
+          lineCount: result.lineCount,
+          scrolled: result.scrolled,
+        },
+      };
+    },
+  });
+}
diff --git a/package.json b/package.json
index 10f812b..7efecf9 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,8 @@
   ],
   "pi": {
     "extensions": [
-      "./extensions"
+      "./extensions/browser-execute",
+      "./extensions/browser-execute-web"
     ],
     "image": "https://raw.githubusercontent.com/citrolabs/pi-browser-cdp-extension/main/logo.png"
   },
diff --git a/src/cdp/session.ts b/src/cdp/session.ts
index dfcbf11..a7e7853 100644
--- a/src/cdp/session.ts
+++ b/src/cdp/session.ts
@@ -41,7 +41,7 @@ export class Session implements Transport {
   private nextId = 1;
   private pending = new Map<number, Pending>();
   private activeSessionId: string | undefined;
-  private chromeProcess?: import("node:child_process").ChildProcess;
+  private chromeProcess: import("node:child_process").ChildProcess | undefined;
   private eventListeners: Array<(method: string, params: unknown, sessionId?: string) => void> = [];
   private callResultListeners: Array<(method: string, params: unknown, result: unknown) => void> = [];
 
diff --git a/src/web-fetch.ts b/src/web-fetch.ts
new file mode 100644
index 0000000..dad8f57
--- /dev/null
+++ b/src/web-fetch.ts
@@ -0,0 +1,490 @@
+/**
+ * Web Fetch & Search: high-level browser tools that wrap the CDP session.
+ *
+ * Ported from ds4_web.c (ds4 checkout on aimax). Provides:
+ * - web_search: searches Google via Chrome and extracts results as markdown
+ * - web_fetch: visits a URL via Chrome and extracts page content as structured markdown
+ *
+ * Both tools reuse the existing CDP session infrastructure (visible Chrome with
+ * user profile, CDP communication via WebSocket).
+ */
+
+import { Session } from "./cdp/session.js";
+
+// ============================================================================
+// Types
+// ============================================================================
+
+export type WebSearchOptions = {
+  query: string;
+  profileDir?: string | undefined;
+  timeoutMs?: number;
+};
+
+export type WebFetchOptions = {
+  url: string;
+  profileDir?: string | undefined;
+  timeoutMs?: number;
+};
+
+export type WebSearchResult = {
+  /** Markdown text of search results (visible links + text snapshot). */
+  markdown: string;
+  /** URL of the Google search page used. */
+  searchUrl: string;
+  /** Total number of visible result links extracted. */
+  linkCount: number;
+};
+
+export type WebFetchResult = {
+  /** Markdown text of the page content. */
+  markdown: string;
+  /** Final URL after redirects. */
+  finalUrl: string;
+  /** Page title. */
+  title: string;
+  /** Whether the page was dynamically scrolled to load more content. */
+  scrolled: boolean;
+  /** Number of links extracted. */
+  linkCount: number;
+  /** Total line count of the extracted content. */
+  lineCount: number;
+};
+
+export type WebError = {
+  error: true;
+  message: string;
+};
+
+export type WebResult = WebSearchResult | WebFetchResult | WebError;
+
+// ============================================================================
+// Helper to build strings with backticks (port from ds4_web.c C code)
+// ============================================================================
+
+function t(str: string): string {
+  return str;
+}
+
+// ============================================================================
+// Google Search JavaScript (port from ds4_web.c:web_extract_search_js)
+// ============================================================================
+
+const GOOGLE_CONSENT_CLICK_JS = t(`(() => {
+  const clean=s=>(s||'').replace(/\\s+/g,' ').trim();
+  const pats=[/accept all/i,/i agree/i,/agree/i,/accetta tutto/i,/tout accepter/i,/aceptar todo/i,/alle akzeptieren/i];
+  const els=[...document.querySelectorAll('button,[role=button],input[type=submit],a')];
+  for (const el of els){const t=clean(el.innerText||el.value||el.textContent);
+  if(!t)continue; if(pats.some(p=>p.test(t))){el.click(); return 'clicked '+t;}}
+  return '';
+})()`);
+
+const GOOGLE_SEARCH_EXTRACT_JS = t(`(() => {
+  const clean=s=>(s||'').replace(/\\s+/g,' ').trim();
+  const esc=s=>clean(s).replace(/\\\\/g,'\\\\\\\\').replace(/\\[/g,'\\\\[').replace(/\\]/g,'\\\\]').replace(/\\n/g,' ');
+  const visible=el=>{const r=el.getBoundingClientRect();const st=getComputedStyle(el);return r.width>0&&r.height>0&&st.display!=='none'&&st.visibility!=='hidden'&&st.opacity!=='0'};
+  const bad=h=>(/(^|\\.)google\\./.test(h)||/(^|\\.)gstatic\\./.test(h)||/(^|\\.)googleusercontent\\./.test(h));
+  const lines=['# Google search results','',\`URL: \${location.href}\`,'','## Visible links'];
+  const seen=new Set();
+  for(const a of document.querySelectorAll('a[href]')){if(!visible(a))continue;let href=a.href||'';
+  try{const u=new URL(href);if(u.pathname==='/url'&&u.searchParams.get('q'))href=u.searchParams.get('q');}catch{}
+  let u;try{u=new URL(href);}catch{continue;}if(!/^https?:$/.test(u.protocol))continue;if(bad(u.hostname))continue;
+  const text=esc(a.innerText||a.textContent);if(text.length<3)continue;if(seen.has(u.href))continue;seen.add(u.href);
+  lines.push(\`- [\${text.slice(0,180)}](\${u.href})\`);if(seen.size>=20)break;}
+  lines.push('','## Text snapshot',clean(document.body.innerText).slice(0,1200));
+  return lines.join('\\n');
+})()`);
+
+// ============================================================================
+// Page Content JavaScript (port from ds4_web.c:web_extract_page_js)
+// ============================================================================
+
+const PAGE_EXTRACT_JS = t(`(() => {
+  const clean=s=>(s||'').replace(/\\s+/g,' ').trim();
+  const esc=s=>clean(s).replace(/\\\\/g,'\\\\\\\\').replace(/\\[/g,'\\\\[').replace(/\\]/g,'\\\\]').replace(/\\n/g,' ');
+  const visible=el=>{const r=el.getBoundingClientRect();const st=getComputedStyle(el);return r.width>0&&r.height>0&&st.display!=='none'&&st.visibility!=='hidden'&&st.opacity!=='0'};
+  const inline=n=>{if(!n)return'';if(n.nodeType===3)return n.nodeValue;if(n.nodeType!==1)return'';const el=n;
+  if(el.tagName==='SCRIPT'||el.tagName==='STYLE'||el.tagName==='NOSCRIPT')return'';
+  if(el.tagName==='A'){const t=esc(el.innerText||el.textContent);const h=el.href||'';return t&&h?\`[\${t}](\${h})\`:t;}
+  if(el.tagName==='CODE')return '\`' + clean(el.innerText||el.textContent).replace(/\`/g,'\\\\\`') + '\`';
+  return [...el.childNodes].map(inline).join('');};
+  const lines=[\`# \${clean(document.title)||location.href}\`,'',\`URL: \${location.href}\`,'','## Content'];
+  const blocks=[...document.body.querySelectorAll('h1,h2,h3,h4,h5,h6,p,li,pre,blockquote,td,th,[id="content-text"],[class*="comment-body"],[class*="comment-content"],[data-testid*="comment-text"]')];
+  const seen=new Set();
+  for(const el of blocks){if(!visible(el))continue;let s='';const tag=el.tagName;
+  if(/^H[1-6]$/.test(tag)){s='#'.repeat(Number(tag[1]))+' '+inline(el);}
+  else if(tag==='LI'){s='- '+inline(el);}
+  else if(tag==='PRE'){s='\\x60\\x60\\x60\\n'+(el.innerText||el.textContent||'').trimEnd()+'\\n\\x60\\x60\\x60';}
+  else if(tag==='BLOCKQUOTE'){s='> '+clean(el.innerText||el.textContent);}
+  else{s=inline(el);}s=s.trim();if(!s||seen.has(s))continue;seen.add(s);lines.push('',s);
+  if(lines.join('\\n').length>900000){lines.push('','[Content truncated by browser extractor.]');break;}}
+  lines.push('','## Visible links');let n=0;const linkSeen=new Set();
+  for(const a of document.querySelectorAll('a[href]')){if(!visible(a))continue;const t=esc(a.innerText||a.textContent);if(t.length<3)continue;
+  let u;try{u=new URL(a.href);}catch{continue;}if(!/^https?:$/.test(u.protocol)||linkSeen.has(u.href))continue;linkSeen.add(u.href);
+  lines.push(\`- [\${t.slice(0,160)}](\${u.href})\`);if(++n>=80)break;}
+  return lines.join('\\n');
+})()`);
+
+// ============================================================================
+// Dynamic Scroll JavaScript (port from ds4_web.c:web_scroll_dynamic_page)
+// ============================================================================
+
+const DYNAMIC_SCROLL_JS = t(`(() => new Promise(resolve => {
+  const root=()=>document.scrollingElement||document.documentElement||document.body;
+  const blockSel='h1,h2,h3,h4,h5,h6,p,li,pre,blockquote,td,th,[id="content-text"],[class*="comment-body"],[class*="comment-content"],[data-testid*="comment-text"]';
+  const lazySel='[onscroll],[loading="lazy"],[data-src],[data-lazy],[class*="lazy"],[class*="infinite"],[class*="virtual"],[role="feed"],[id*="comment"],[class*="comment"],[data-testid*="comment"]';
+  const hookCount=()=>{let n=0;try{if(window.onscroll)n++;if(document.onscroll)n++;if(document.body&&document.body.onscroll)n++;}catch(e){}
+  try{if(typeof getEventListeners==='function'){for(const o of [window,document,document.body]){if(!o)continue;const ev=getEventListeners(o);if(ev&&ev.scroll)n+=ev.scroll.length;}}}catch(e){}
+  try{n+=document.querySelectorAll(lazySel).length;}catch(e){}return n;};
+  const metrics=()=>{const r=root();return {
+  height:r?r.scrollHeight:0,
+  view:innerHeight||900,
+  y:scrollY||(r&&r.scrollTop)||0,
+  text:((document.body&&document.body.innerText)||'').length,
+  links:document.links?document.links.length:0,
+  blocks:document.body?document.body.querySelectorAll(blockSel).length:0,
+  hooks:hookCount()};};
+  const sig=m=>[m.height,m.text,m.links,m.blocks].join('|');
+  const grew=(a,b)=>b.height>a.height+20||b.text>a.text+200||b.links>a.links+2||b.blocks>a.blocks+2;
+  const scrollOnce=()=>{const r=root();if(!r)return;
+  const h=Math.max(700,Math.floor((innerHeight||900)*0.85));
+  window.scrollTo(0,Math.min(r.scrollHeight,(scrollY||r.scrollTop||0)+h));};
+  let last=metrics(),lastSig=sig(last),same=0,steps=0;
+  const scrollable=last.height>last.view*1.35;
+  if(!scrollable||last.hooks===0){resolve('scroll skipped hooks='+last.hooks+' text='+last.text);return;}
+  const tick=()=>{
+  if(steps>=28){resolve('scrolled '+steps+' text='+last.text);return;}
+  const before=last;
+  scrollOnce();steps++;
+  setTimeout(()=>{const now=metrics(),nowSig=sig(now);
+  if(nowSig===lastSig)same++;else same=0;
+  const loaded=grew(before,now);
+  last=now;lastSig=nowSig;
+  if(steps===1&&!loaded){resolve('scroll probe unchanged text='+now.text);return;}
+  const atBottom=now.y+now.view+20>=now.height;
+  if(same>=4||(atBottom&&same>=1)){resolve('scrolled '+steps+' text='+now.text);return;}
+  tick();},900);};tick();
+}))()`);
+
+// ============================================================================
+// Utility: wait for page readiness
+// ============================================================================
+
+async function waitForPageReady(session: Session): Promise<void> {
+  for (let i = 0; i < 80; i++) {
+    try {
+      const state = (await session.domains.Runtime.evaluate({
+        expression: "document.readyState",
+        returnByValue: true,
+      })) as { result?: { value?: string } };
+      const ready = state?.result?.value as string;
+      if (ready === "complete" || ready === "interactive") {
+        await new Promise((r) => setTimeout(r, 800));
+        return;
+      }
+    } catch {
+      // Skip on transient errors
+    }
+    await new Promise((r) => setTimeout(r, 250));
+  }
+}
+
+// ============================================================================
+// Wait for navigation to complete
+// ============================================================================
+
+async function waitForNavigated(session: Session, maxAttempts = 100): Promise<boolean> {
+  let lastLen = -1;
+  let stable = 0;
+  let sawRealUrl = false;
+
+  for (let i = 0; i < maxAttempts; i++) {
+    try {
+      const probe = (await session.domains.Runtime.evaluate({
+        expression:
+          "location.href+'\\n'+document.readyState+'\\n'+((document.body&&document.body.innerText)||'').length",
+        returnByValue: true,
+      })) as { result?: { value?: string } };
+      const raw = probe?.result?.value as string;
+      if (!raw) {
+        await new Promise((r) => setTimeout(r, 250));
+        continue;
+      }
+      const parts = raw.split('\n');
+      if (parts.length < 3) {
+        await new Promise((r) => setTimeout(r, 250));
+        continue;
+      }
+      const href = parts[0]?.trim() || '';
+      const ready = parts[1]?.trim() || '';
+      const textLen = Number(parts[2]) || 0;
+
+      const realUrl = href && href.length > 0 &&
+        href !== "about:blank" &&
+        !href.startsWith("chrome://");
+      const readyState = ready === "complete" || ready === "interactive";
+
+      if (realUrl) sawRealUrl = true;
+      if (textLen > 0 && textLen === lastLen) stable++;
+      else stable = 0;
+      lastLen = textLen;
+
+      if (sawRealUrl && readyState && textLen > 0 && stable >= 2) {
+        await new Promise((r) => setTimeout(r, 500));
+        return true;
+      }
+      if (sawRealUrl && readyState && i >= 24) return true;
+    } catch {
+      // Skip on transient errors
+    }
+    await new Promise((r) => setTimeout(r, 250));
+  }
+  return true;
+}
+
+// ============================================================================
+// Open a tab and attach to it via CDP
+// ============================================================================
+
+async function openTab(
+  session: Session,
+  url: string,
+): Promise<string> {
+  // Create a new target (tab) in the background
+  const result = (await session.domains.Target.createTarget({
+    url,
+    background: true,
+    newWindow: false,
+  })) as { targetId: string };
+  return result.targetId;
+}
+
+// ============================================================================
+// Execute JS on a page with error handling
+// ============================================================================
+
+async function evaluate(
+  session: Session,
+  expression: string,
+): Promise<string | null> {
+  const result = (await session.domains.Runtime.evaluate({
+    expression,
+    returnByValue: true,
+    awaitPromise: true,
+  })) as {
+    result?: { type?: string; value?: unknown; className?: string };
+    exceptionDetails?: { text?: string };
+  };
+
+  if (result.exceptionDetails?.text) {
+    throw new Error(`JavaScript evaluation failed: ${result.exceptionDetails.text}`);
+  }
+
+  if (result.result?.type === "undefined") return null;
+  if (result.result?.type === "string") return result.result.value as string;
+  if (result.result?.value !== undefined) return JSON.stringify(result.result.value);
+  return null;
+}
+
+// ============================================================================
+// Run a page with CDP: navigate, scroll (optional), and extract
+// ============================================================================
+
+export interface RunPageOptions {
+  session: Session;
+  url: string;
+  extractJs: string;
+  scrollDynamic?: boolean;
+}
+
+export async function runPage(opts: RunPageOptions): Promise<string> {
+  const { session, url, extractJs, scrollDynamic = true } = opts;
+
+  // Open a new tab for this operation
+  const targetId = await openTab(session, "about:blank");
+
+  // Attach to the tab
+  const sessionId = await session.use(targetId);
+
+  try {
+    // Enable domains
+    await session.domains.Page.enable();
+    await session.domains.Runtime.enable();
+
+    // Navigate to the target URL
+    await session.domains.Page.navigate({ url });
+    await waitForNavigated(session);
+
+    // Try to click Google consent dialogs
+    try {
+      const consentResult = await evaluate(session, GOOGLE_CONSENT_CLICK_JS);
+      if (consentResult && consentResult.length > 0) {
+        // Consent was clicked; wait for any navigation
+        await new Promise((r) => setTimeout(r, 1500));
+        try {
+          await waitForNavigated(session);
+        } catch {
+          // Ignore navigation wait failures after consent
+        }
+      }
+    } catch {
+      // Consent click is best-effort
+    }
+
+    // Optionally scroll the page to trigger lazy loading
+    if (scrollDynamic) {
+      try {
+        await evaluate(session, DYNAMIC_SCROLL_JS);
+      } catch {
+        // Scrolling is best-effort
+      }
+    }
+
+    // Extract content using the provided JS
+    const content = await evaluate(session, extractJs);
+    if (content === null) {
+      throw new Error("Page extraction returned null");
+    }
+    return content;
+  } finally {
+    // Close the tab
+    session.setActiveSession(undefined);
+    try {
+      await session.domains.Target.closeTarget({ targetId });
+    } catch {
+      // Ignore close errors
+    }
+  }
+}
+
+// ============================================================================
+// Ensure Chrome is running and connected
+// ============================================================================
+
+async function ensureConnected(session: Session): Promise<void> {
+  if (session.isConnected()) {
+    // Check if browser is alive
+    try {
+      await session.domains.Browser.getVersion();
+      return; // Browser is alive
+    } catch {
+      // Browser may have died; fall through
+    }
+  }
+  // Session is not connected or browser is dead; connect will handle it
+  // (user should have called session.connect() with profileDir)
+  throw new Error("Browser is not connected. Call session.connect({ profileDir }) first.");
+}
+
+// ============================================================================
+// Web Search
+// ============================================================================
+
+/**
+ * Search Google using a visible Chrome browser via CDP.
+ *
+ * Returns markdown containing:
+ * - Visible links (up to 20 results)
+ * - A text snapshot of the search results page
+ *
+ * Handles Google consent dialogs automatically.
+ */
+export async function webSearch(opts: WebSearchOptions): Promise<WebSearchResult | WebError> {
+  const { query, profileDir } = opts;
+  if (!query || query.length === 0) {
+    return { error: true, message: "web_search requires a query parameter" };
+  }
+
+  // Build the Google search URL
+  const encoded = encodeURIComponent(query);
+  const searchUrl = `https://www.google.com/search?q=${encoded}`;
+
+  try {
+    const sessionObj = new Session();
+    if (profileDir) {
+      await sessionObj.connect({ profileDir, launchBrowser: true });
+    } else {
+      await ensureConnected(sessionObj);
+    }
+
+    const result = await runPage({
+      session: sessionObj,
+      url: searchUrl,
+      extractJs: GOOGLE_SEARCH_EXTRACT_JS,
+      scrollDynamic: false,
+    });
+
+    // Count links
+    const linkCount = (result.match(/^- \[/gm) || []).length;
+
+    return {
+      markdown: result,
+      searchUrl,
+      linkCount,
+    };
+  } catch (error) {
+    const message = error instanceof Error ? error.message : String(error);
+    return { error: true, message: `web_search failed: ${message}` };
+  }
+}
+
+// ============================================================================
+// Web Fetch
+// ============================================================================
+
+/**
+ * Fetch and extract page content from a URL using a visible Chrome browser via CDP.
+ *
+ * Returns structured markdown containing:
+ * - Page title as heading
+ * - Content extracted from semantic HTML elements (headings, paragraphs, lists, code, blockquotes)
+ * - Visible links section
+ * - Truncation at 900KB
+ *
+ * Dynamically scrolls the page to trigger lazy loading before extraction.
+ */
+export async function webFetch(opts: WebFetchOptions): Promise<WebFetchResult | WebError> {
+  const { url, profileDir } = opts;
+  if (!url || url.length === 0) {
+    return { error: true, message: "web_fetch requires a url parameter" };
+  }
+
+  try {
+    const sessionObj = new Session();
+    if (profileDir) {
+      await sessionObj.connect({ profileDir, launchBrowser: true });
+    } else {
+      await ensureConnected(sessionObj);
+    }
+
+    const result = await runPage({
+      session: sessionObj,
+      url,
+      extractJs: PAGE_EXTRACT_JS,
+      scrollDynamic: true,
+    });
+
+    // Extract metadata
+    const titleMatch = result.match(/^# (.+)$/m);
+    const title = titleMatch?.[1] ?? "";
+    const finalUrlMatch = result.match(/^URL: (.+)$/m);
+    const finalUrl = finalUrlMatch?.[1] ?? url;
+    const linkCount = (result.match(/^- \[/gm) || []).length;
+    const lineCount = result.split('\n').length;
+
+    // Determine if scrolled (look for scroll info in comments or content)
+    const scrolled = result.includes("scrolled") || result.includes("Content truncated");
+
+    return {
+      markdown: result,
+      finalUrl,
+      title,
+      scrolled,
+      linkCount,
+      lineCount,
+    };
+  } catch (error) {
+    const message = error instanceof Error ? error.message : String(error);
+    return { error: true, message: `web_fetch failed: ${message}` };
+  }
+}
diff --git a/test/browser-execute-web.test.ts b/test/browser-execute-web.test.ts
new file mode 100644
index 0000000..7d352a9
--- /dev/null
+++ b/test/browser-execute-web.test.ts
@@ -0,0 +1,209 @@
+import { mkdtemp, rm } from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import type { ExtensionAPI, ExtensionContext, ToolDefinition } from "@earendil-works/pi-coding-agent";
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { SessionStore } from "../src/session-store.js";
+import browserExecuteWebExtension from "../extensions/browser-execute-web.js";
+
+const tempDirs: string[] = [];
+const sessionIds = new Set<string>();
+
+async function tmp(prefix: string): Promise<string> {
+  const dir = await mkdtemp(path.join(os.tmpdir(), prefix));
+  tempDirs.push(dir);
+  return dir;
+}
+
+function minimalContext(cwd: string, sessionId?: string): ExtensionContext & { sessionId?: string } {
+  const ctx: ExtensionContext & { sessionId?: string } = {
+    cwd,
+    ui: {} as ExtensionContext["ui"],
+    hasUI: false,
+    sessionManager: {} as ExtensionContext["sessionManager"],
+    modelRegistry: {} as ExtensionContext["modelRegistry"],
+    model: undefined,
+    signal: undefined,
+    isIdle: () => true,
+    abort: () => {},
+    hasPendingMessages: () => false,
+    shutdown: () => {},
+    getContextUsage: () => undefined,
+    compact: () => {},
+    getSystemPrompt: () => "",
+  };
+  if (sessionId !== undefined) ctx.sessionId = sessionId;
+  return ctx;
+}
+
+function loadTools(): { webSearch: ToolDefinition<any, any, any>; webFetch: ToolDefinition<any, any, any> } {
+  let webSearch: ToolDefinition<any, any, any> | undefined;
+  let webFetch: ToolDefinition<any, any, any> | undefined;
+
+  browserExecuteWebExtension({
+    registerTool(tool: ToolDefinition<any, any, any>) {
+      if (tool.name === "web_search") webSearch = tool;
+      if (tool.name === "web_fetch") webFetch = tool;
+    },
+  } as ExtensionAPI);
+
+  if (!webSearch) throw new Error("extension did not register web_search");
+  if (!webFetch) throw new Error("extension did not register web_fetch");
+  return { webSearch, webFetch };
+}
+
+afterEach(async () => {
+  for (const sessionID of sessionIds) SessionStore.evict(sessionID);
+  sessionIds.clear();
+  await Promise.all(tempDirs.splice(0).map((dir) => rm(dir, { recursive: true, force: true })));
+  vi.restoreAllMocks();
+});
+
+function getTextContent(result: { content: Array<unknown> }): Record<string, unknown> {
+  const first = result.content[0];
+  expect(first).toBeDefined();
+  expect((first as Record<string, unknown>).type).toBe("text");
+  return first as Record<string, unknown>;
+}
+
+// ============================================================================
+// web_search tests
+// ============================================================================
+
+describe("web_search Pi extension adapter", () => {
+  it("registers the web_search tool with prompt guidance", () => {
+    const { webSearch } = loadTools();
+
+    expect(webSearch.name).toBe("web_search");
+    expect(webSearch.label).toBe("Web Search");
+    expect(webSearch.promptSnippet).toContain("Google");
+    expect(webSearch.promptGuidelines?.some((line) => line.includes("web_fetch"))).toBe(true);
+  });
+
+  it("returns text content with error message for empty query", async () => {
+    const cwd = await tmp("pi-websearch-cwd-");
+    const { webSearch } = loadTools();
+    const sessionID = "websearch-session";
+    sessionIds.add(sessionID);
+
+    const result = await webSearch.execute(
+      "tool-call-1",
+      { query: "" },
+      undefined,
+      undefined,
+      minimalContext(cwd, sessionID),
+    );
+
+    const textContent = getTextContent(result);
+    const text = textContent.text as string;
+    expect(text).toContain("Error");
+    expect(text).toContain("requires a query parameter");
+  });
+
+  it("returns details with query for error case", async () => {
+    const cwd = await tmp("pi-websearch-cwd-");
+    const { webSearch } = loadTools();
+    const sessionID = "websearch-details-session";
+    sessionIds.add(sessionID);
+
+    const result = await webSearch.execute(
+      "tool-call-1",
+      { query: "" },
+      undefined,
+      undefined,
+      minimalContext(cwd, sessionID),
+    );
+
+    expect(result.details).toMatchObject({
+      query: "",
+      error: expect.any(String),
+    });
+  });
+});
+
+// ============================================================================
+// web_fetch tests
+// ============================================================================
+
+describe("web_fetch Pi extension adapter", () => {
+  it("registers the web_fetch tool with prompt guidance", () => {
+    const { webFetch } = loadTools();
+
+    expect(webFetch.name).toBe("web_fetch");
+    expect(webFetch.label).toBe("Web Fetch");
+    expect(webFetch.promptSnippet).toContain("Chrome");
+    expect(webFetch.promptGuidelines?.some((line) => line.includes("web_search"))).toBe(true);
+  });
+
+  it("returns text content with error message for empty url", async () => {
+    const cwd = await tmp("pi-webfetch-cwd-");
+    const { webFetch } = loadTools();
+    const sessionID = "webfetch-session";
+    sessionIds.add(sessionID);
+
+    const result = await webFetch.execute(
+      "tool-call-1",
+      { url: "" },
+      undefined,
+      undefined,
+      minimalContext(cwd, sessionID),
+    );
+
+    const textContent = getTextContent(result);
+    const text = textContent.text as string;
+    expect(text).toContain("Error");
+    expect(text).toContain("requires a url parameter");
+  });
+
+  it("returns details with url for error case", async () => {
+    const cwd = await tmp("pi-webfetch-cwd-");
+    const { webFetch } = loadTools();
+    const sessionID = "webfetch-details-session";
+    sessionIds.add(sessionID);
+
+    const result = await webFetch.execute(
+      "tool-call-1",
+      { url: "" },
+      undefined,
+      undefined,
+      minimalContext(cwd, sessionID),
+    );
+
+    expect(result.details).toMatchObject({
+      url: "",
+      error: expect.any(String),
+    });
+  });
+});
+
+// ============================================================================
+// Combined tests
+// ============================================================================
+
+describe("web_search + web_fetch together", () => {
+  it("both tools are registered by the extension", () => {
+    let registeredNames: string[] = [];
+
+    browserExecuteWebExtension({
+      registerTool(tool: ToolDefinition<any, any, any>) {
+        registeredNames.push(tool.name);
+      },
+    } as ExtensionAPI);
+
+    expect(registeredNames).toContain("web_search");
+    expect(registeredNames).toContain("web_fetch");
+    expect(registeredNames).toHaveLength(2);
+  });
+
+  it("web_search has guidance referencing web_fetch", () => {
+    const { webSearch } = loadTools();
+    const guidance = webSearch.promptGuidelines ?? [];
+    expect(guidance.some((g) => g.toLowerCase().includes("web_fetch"))).toBe(true);
+  });
+
+  it("web_fetch has guidance referencing web_search", () => {
+    const { webFetch } = loadTools();
+    const guidance = webFetch.promptGuidelines ?? [];
+    expect(guidance.some((g) => g.toLowerCase().includes("web_search"))).toBe(true);
+  });
+});
diff --git a/test/web-fetch.test.ts b/test/web-fetch.test.ts
new file mode 100644
index 0000000..9df5e4d
--- /dev/null
+++ b/test/web-fetch.test.ts
@@ -0,0 +1,328 @@
+import { describe, expect, it, vi, afterEach } from "vitest";
+import { Session } from "../src/cdp/session.js";
+import { webSearch, webFetch, runPage } from "../src/web-fetch.js";
+
+// ============================================================================
+// Constants
+// ============================================================================
+
+const PROBE_EXPR = "location.href+'\\n'+document.readyState+'\\n'+((document.body&&document.body.innerText)||'').length";
+
+// ============================================================================
+// Mock helpers
+// ============================================================================
+
+type CallRecord = { method: string; params?: Record<string, unknown> | undefined };
+
+function createMockSession(): {
+	session: Session & {
+		_mockCalls: CallRecord[];
+		_mockRuntime: {
+			results: Map<string, string>;
+			exceptions: Set<string>;
+			undefineds: Set<string>;
+			defaultProbe: (href?: string, ready?: string, textLen?: number) => void;
+		};
+	};
+	calls: CallRecord[];
+	setProbeResult: (href: string, ready: string, textLen: number) => void;
+	setRuntimeResult: (expr: string, value: string) => void;
+	setRuntimeException: (expr: string) => void;
+	setRuntimeUndefined: (expr: string) => void;
+} {
+	const calls: CallRecord[] = [];
+	const runtimeResults = new Map<string, string>();
+	const runtimeExceptions = new Set<string>();
+	const runtimeUndefineds = new Set<string>();
+	let _connected = false;
+
+	const session = new Session();
+	const mockSession = session as unknown as Session & {
+		_mockCalls: CallRecord[];
+		_mockRuntime: {
+			results: Map<string, string>;
+			exceptions: Set<string>;
+			undefineds: Set<string>;
+			defaultProbe: (href?: string, ready?: string, textLen?: number) => void;
+		};
+	};
+
+	(session as unknown as Record<string, unknown>).isConnected = () => _connected;
+	(session as unknown as Record<string, unknown>).connect = async () => { _connected = true; };
+	(session as unknown as Record<string, unknown>).use = async (targetId: string) => targetId;
+	(session as unknown as Record<string, unknown>).setActiveSession = () => {};
+
+	vi.spyOn(session, "_call").mockImplementation(async (method: string, params?: unknown) => {
+		const rec: CallRecord = { method, params: params as Record<string, unknown> | undefined };
+		calls.push(rec);
+		mockSession._mockCalls.push(rec);
+
+		if (method === "Target.createTarget") {
+			return { targetId: `mock-target-${calls.length}` };
+		}
+		if (method === "Target.closeTarget") {
+			return {};
+		}
+		if (method === "Page.navigate") {
+			return { frameId: "mock-frame" };
+		}
+		if (method === "Page.enable" || method === "Runtime.enable") {
+			return {};
+		}
+		if (method === "Runtime.evaluate") {
+			const expr = (params as { expression?: string })?.expression ?? "";
+			if (runtimeExceptions.has(expr)) {
+				return { exceptionDetails: { text: "mock error" } };
+			}
+			if (runtimeUndefineds.has(expr)) {
+				return { result: { type: "undefined" } };
+			}
+			const val = runtimeResults.get(expr);
+			if (val !== undefined) {
+				return { result: { type: "string", value: val } };
+			}
+			return { result: { type: "string", value: "" } };
+		}
+		if (method === "Browser.getVersion") {
+			return { protocolVersion: "1.3", product: "Chrome/124.0" };
+		}
+		return {};
+	});
+
+	function setProbeResult(href: string, ready: string, textLen: number): void {
+		const raw = `${href}\n${ready}\n${textLen}`;
+		runtimeResults.set(PROBE_EXPR, raw);
+	}
+
+	function defaultProbe(href = "https://example.com", ready = "complete", textLen = 100): void {
+		setProbeResult(href, ready, textLen);
+	}
+
+	function setRuntimeResult(expr: string, value: string): void {
+		runtimeResults.set(expr, value);
+	}
+
+	function setRuntimeException(expr: string): void {
+		runtimeExceptions.add(expr);
+	}
+
+	function setRuntimeUndefined(expr: string): void {
+		runtimeUndefineds.add(expr);
+	}
+
+	mockSession._mockCalls = calls;
+	mockSession._mockRuntime = {
+		results: runtimeResults,
+		exceptions: runtimeExceptions,
+		undefineds: runtimeUndefineds,
+		defaultProbe,
+	};
+
+	return {
+		session: mockSession,
+		calls,
+		setProbeResult,
+		setRuntimeResult,
+		setRuntimeException,
+		setRuntimeUndefined,
+	};
+}
+
+// ============================================================================
+// runPage tests
+// ============================================================================
+
+describe("runPage", () => {
+	it("navigates, extracts content, and closes the tab", async () => {
+		const { session, calls } = createMockSession();
+		const mockExtractJs = `(() => "# Title\\n\\nURL: https://example.com\\n\\n## Content\\nHello world")()`;
+		session._mockRuntime.results.set(mockExtractJs, "Hello world");
+		session._mockRuntime.defaultProbe();
+
+		const result = await runPage({
+			session,
+			url: "https://example.com",
+			extractJs: mockExtractJs,
+			scrollDynamic: false,
+		});
+
+		expect(result).toBe("Hello world");
+		expect(calls.some((c) => c.method === "Target.createTarget")).toBe(true);
+		expect(calls.some((c) => c.method === "Page.navigate")).toBe(true);
+		expect(calls.some((c) => c.method === "Target.closeTarget")).toBe(true);
+	});
+
+	it("throws when extraction returns null (undefined result)", async () => {
+		const { session } = createMockSession();
+		session._mockRuntime.undefineds.add("null-extract");
+		session._mockRuntime.defaultProbe();
+
+		await expect(
+			runPage({
+				session,
+				url: "https://example.com",
+				extractJs: "null-extract",
+				scrollDynamic: false,
+			}),
+		).rejects.toThrow("Page extraction returned null");
+	});
+
+	it("throws on JavaScript evaluation error", async () => {
+		const { session } = createMockSession();
+		session._mockRuntime.exceptions.add("boom-extract");
+		session._mockRuntime.defaultProbe();
+
+		await expect(
+			runPage({
+				session,
+				url: "https://example.com",
+				extractJs: "boom-extract",
+				scrollDynamic: false,
+			}),
+		).rejects.toThrow("JavaScript evaluation failed");
+	});
+
+	it("handles consent dialog clicks gracefully", async () => {
+		const { session } = createMockSession();
+		const consentJs = `(() => {
+  const clean=s=>(s||'').replace(/\\s+/g,' ').trim();
+  const pats=[/accept all/i,/i agree/i,/agree/i,/accetta tutto/i,/tout accepter/i,/aceptar todo/i,/alle akzeptieren/i];
+  const els=[...document.querySelectorAll('button,[role=button],input[type=submit],a')];
+  for (const el of els){const t=clean(el.innerText||el.value||el.textContent);
+  if(!t)continue; if(pats.some(p=>p.test(t))){el.click(); return 'clicked '+t;}}
+  return '';
+})()`;
+		session._mockRuntime.results.set(consentJs, "clicked Accept all");
+		session._mockRuntime.defaultProbe("https://www.google.com/search?q=test", "complete", 100);
+		session._mockRuntime.defaultProbe("https://www.google.com/search?q=test", "complete", 100);
+		const mockExtractJs = `(() => "# Results")()`;
+		session._mockRuntime.results.set(mockExtractJs, "# Results");
+
+		await runPage({
+			session,
+			url: "https://www.google.com/search?q=test",
+			extractJs: mockExtractJs,
+			scrollDynamic: false,
+		});
+
+		expect(session._mockCalls.some((c) =>
+			(c.params as { expression?: string })?.expression?.includes("accept all"),
+		)).toBe(true);
+	});
+});
+
+// ============================================================================
+// webSearch tests
+// ============================================================================
+
+describe("webSearch", () => {
+	it("returns error when query is empty", async () => {
+		const result = await webSearch({ query: "" });
+		expect("error" in result).toBe(true);
+		if ("error" in result) expect(result.message).toContain("requires a query parameter");
+	});
+
+	it("returns error when query is whitespace only", async () => {
+		const result = await webSearch({ query: "   " });
+		expect("error" in result).toBe(true);
+	});
+
+	it("returns error from CDP when browser is unavailable", async () => {
+		const result = await webSearch({ query: "hello" });
+		expect("error" in result).toBe(true);
+		if ("error" in result) {
+			expect(result.message).toContain("failed");
+		}
+	});
+
+	it("builds correct Google search URL with encoding", async () => {
+		const result = await webSearch({ query: "hello world & foo" });
+		expect("error" in result).toBe(true);
+		if ("error" in result) {
+			expect(result.message).toContain("web_search");
+		}
+	});
+});
+
+// ============================================================================
+// webFetch tests
+// ============================================================================
+
+describe("webFetch", () => {
+	it("returns error when url is empty", async () => {
+		const result = await webFetch({ url: "" });
+		expect("error" in result).toBe(true);
+		if ("error" in result) expect(result.message).toContain("requires a url parameter");
+	});
+
+	it("returns error when url is missing", async () => {
+		const result = await webFetch({ url: "" });
+		expect("error" in result).toBe(true);
+	});
+
+	it("returns error from CDP when browser is unavailable", async () => {
+		const result = await webFetch({ url: "https://example.com" });
+		expect("error" in result).toBe(true);
+		if ("error" in result) {
+			expect(result.message).toContain("failed");
+		}
+	});
+});
+
+// ============================================================================
+// Metadata extraction tests (pure string manipulation, no browser needed)
+// ============================================================================
+
+describe("metadata extraction", () => {
+	it("extracts title from heading", () => {
+		const result = "# My Page Title\n\nURL: https://example.com\n\n## Content";
+		const match = result.match(/^# (.+)$/m);
+		expect(match?.[1]).toBe("My Page Title");
+	});
+
+	it("extracts final URL", () => {
+		const result = "# Title\n\nURL: https://example.com/page\n\n## Content";
+		const match = result.match(/^URL: (.+)$/m);
+		expect(match?.[1]).toBe("https://example.com/page");
+	});
+
+	it("falls back to original URL when no URL header found", () => {
+		const result = "# Title\n\n## Content";
+		const match = result.match(/^URL: (.+)$/m);
+		expect(match?.[1] ?? "https://fallback.com").toBe("https://fallback.com");
+	});
+
+	it("counts link lines correctly", () => {
+		const result = "- [Link 1](http://a.com)\n- [Link 2](http://b.com)\n- [Link 3](http://c.com)";
+		const count = (result.match(/^- \[/gm) || []).length;
+		expect(count).toBe(3);
+	});
+
+	it("returns zero links when no links present", () => {
+		const result = "# Title\n\n## Content\nNo links here";
+		const count = (result.match(/^- \[/gm) || []).length;
+		expect(count).toBe(0);
+	});
+
+	it("counts lines", () => {
+		const result = "line 1\nline 2\nline 3";
+		expect(result.split('\n').length).toBe(3);
+	});
+
+	it("detects scrolled content", () => {
+		const result = "scrolled 4 text=1200";
+		expect(result.includes("scrolled")).toBe(true);
+	});
+
+	it("detects truncated content", () => {
+		const result = "[Content truncated by browser extractor.]";
+		expect(result.includes("Content truncated")).toBe(true);
+	});
+
+	it("handles missing title gracefully", () => {
+		const result = "## Content\nNo title";
+		const match = result.match(/^# (.+)$/m);
+		expect(match?.[1]).toBe(undefined);
+		expect(match?.[1] ?? "").toBe("");
+	});
+});

From bdc1c603578a1f18a274c27da6f35e32be060a95 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Mon, 20 Jul 2026 21:19:39 +0200
Subject: [PATCH 09/19] fix: improve web_search and web_fetch tool descriptions
 to discourage curl

Make tool descriptions explicitly tell the LLM to prefer these tools
over curl for web searches and page fetching. Add stronger guidance
in promptGuidelines to use web_search/web_fetch instead of curl.
---
 extensions/browser-execute-web.ts | 47 +++++++++++++++----------------
 1 file changed, 23 insertions(+), 24 deletions(-)

diff --git a/extensions/browser-execute-web.ts b/extensions/browser-execute-web.ts
index baf22f5..589d97a 100644
--- a/extensions/browser-execute-web.ts
+++ b/extensions/browser-execute-web.ts
@@ -47,22 +47,22 @@ export default function browserExecuteWebExtension(pi: ExtensionAPI) {
   pi.registerTool({
     name: "web_search",
     label: "Web Search",
-    description: `Search Google using a visible Chrome browser via CDP and extract the search results as structured markdown.
+    description: `Search Google and return structured results as markdown. Always prefer this tool over curl for web searches.
 
-The tool opens a Chrome tab, navigates to Google Search, handles consent dialogs automatically, and extracts up to 20 visible result links along with a text snapshot of the results page.
+This tool queries Google Search and returns up to 20 visible result links with their text and URLs, plus a text snapshot of the results page.
 
-Results include:
-- Visible links section with link text and URLs (up to 20 results)
-- A text snapshot of the search results content
+Use this tool instead of curl when:
+- The user asks to search the web or find information
+- You need to see Google search results in a structured format
+- You want to discover URLs before reading them with web_fetch
 
-This tool is ideal for finding information on the web. Use web_fetch to read the full content of any URL discovered through search.`,
-    promptSnippet: "Search Google using Chrome via CDP and extract search results as markdown.",
+Returns structured markdown with links and a text snapshot of results.`,
+    promptSnippet: "Search Google and return structured results as markdown. Use instead of curl for web searches.",
     promptGuidelines: [
-      "Use web_search when the user asks to find information on the web.",
+      "Use web_search (NOT curl) whenever the user asks to search the web or find information online.",
       "Pass a descriptive, specific query for best results.",
-      "After getting search results, use web_fetch to read full pages of interest.",
-      "web_search and web_fetch share the same Chrome profile for session continuity.",
-      "Both tools can use profileDir to reuse an existing Chrome session.",
+      "Use web_fetch to read the full content of URLs discovered through search.",
+      "web_search and web_fetch share the same browser session for continuity.",
     ],
     parameters: WebSearchParams,
     async execute(_toolCallId, params, _signal, _onUpdate, ctx) {
@@ -102,24 +102,23 @@ This tool is ideal for finding information on the web. Use web_fetch to read the
   pi.registerTool({
     name: "web_fetch",
     label: "Web Fetch",
-    description: `Fetch and extract page content from a URL using a visible Chrome browser via CDP.
+    description: `Fetch a URL and extract its content as structured markdown. Always prefer this tool over curl for fetching web pages.
 
-The tool opens a Chrome tab, navigates to the URL, handles consent dialogs, dynamically scrolls the page to trigger lazy loading, then extracts structured markdown content.
+This tool fetches any URL and returns structured markdown including the page title, content from semantic HTML elements (headings, paragraphs, lists, code, blockquotes), and visible links.
 
-Extracted content includes:
-- Page title as a heading
-- Content from semantic HTML elements (headings, paragraphs, lists, code blocks, blockquotes)
-- A visible links section (up to 80 links)
-- Content truncated at 900KB
+Use this tool instead of curl when:
+- The user asks to read, fetch, or get the content of a webpage
+- You need structured markdown output instead of raw HTML
+- The page uses JavaScript rendering or lazy loading
+- You want to avoid parsing HTML yourself
 
-This tool is ideal for reading full pages when you need the structured content. Use web_search to discover URLs first.`,
-    promptSnippet: "Fetch and extract structured markdown content from a URL using Chrome via CDP.",
+Returns clean structured markdown, not raw HTML or curl output.`,
+    promptSnippet: "Fetch any URL and extract content as structured markdown. Use instead of curl for web pages.",
     promptGuidelines: [
-      "Use web_fetch when you need the full content of a specific URL.",
+      "Use web_fetch (NOT curl) whenever the user asks to read, fetch, or get the content of a webpage.",
       "Pass the complete URL including the protocol (https://).",
-      "For dynamic pages with lazy loading, the tool automatically scrolls to extract more content.",
-      "web_fetch and web_search share the same Chrome profile for session continuity.",
-      "Both tools can use profileDir to reuse an existing Chrome session.",
+      "For dynamic pages with lazy loading, this tool automatically scrolls to load more content.",
+      "web_fetch and web_search share the same browser session for continuity.",
     ],
     parameters: WebFetchParams,
     async execute(_toolCallId, params, _signal, _onUpdate, ctx) {

From 78d57f552907d015a7790e66391ce8ece202e695 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Mon, 20 Jul 2026 21:24:29 +0200
Subject: [PATCH 10/19] fix: open visible Chrome tabs for web_search and
 web_fetch

Change Target.createTarget from background: true to background: false
so the user can see Chrome navigating during web search and fetch
operations, matching the 'visible Chrome' design goal.
---
 src/web-fetch.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/web-fetch.ts b/src/web-fetch.ts
index dad8f57..6bffb88 100644
--- a/src/web-fetch.ts
+++ b/src/web-fetch.ts
@@ -250,10 +250,10 @@ async function openTab(
   session: Session,
   url: string,
 ): Promise<string> {
-  // Create a new target (tab) in the background
+  // Create a new visible target (tab) so user can see what's happening
   const result = (await session.domains.Target.createTarget({
     url,
-    background: true,
+    background: false,
     newWindow: false,
   })) as { targetId: string };
   return result.targetId;

From 941589d08f604a724f06f955693fe855c65d62d6 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Mon, 20 Jul 2026 21:26:36 +0200
Subject: [PATCH 11/19] fix: update web_fetch test assertion for new
 promptSnippet

The promptSnippet was changed from 'Chrome' to 'curl' to emphasize
the tool is a curl replacement. Update test accordingly.
---
 test/browser-execute-web.test.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/browser-execute-web.test.ts b/test/browser-execute-web.test.ts
index 7d352a9..7a37037 100644
--- a/test/browser-execute-web.test.ts
+++ b/test/browser-execute-web.test.ts
@@ -131,7 +131,7 @@ describe("web_fetch Pi extension adapter", () => {
 
     expect(webFetch.name).toBe("web_fetch");
     expect(webFetch.label).toBe("Web Fetch");
-    expect(webFetch.promptSnippet).toContain("Chrome");
+    expect(webFetch.promptSnippet).toContain("curl");
     expect(webFetch.promptGuidelines?.some((line) => line.includes("web_search"))).toBe(true);
   });
 

From 3554d683ac2a1985708e66c742676ca79443baee Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Mon, 20 Jul 2026 21:51:17 +0200
Subject: [PATCH 12/19] test: add integration tests with real Chrome browser

Integration tests connect to Chrome on port 9333, navigate to pages,
extract content, and leave tabs visible for 15 seconds so the user
can visually verify tabs actually open during web_search/web_fetch.
---
 test/integration-web-tools.test.ts | 114 +++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
 create mode 100644 test/integration-web-tools.test.ts

diff --git a/test/integration-web-tools.test.ts b/test/integration-web-tools.test.ts
new file mode 100644
index 0000000..6d53ea1
--- /dev/null
+++ b/test/integration-web-tools.test.ts
@@ -0,0 +1,114 @@
+/**
+ * Integration tests that connect to a real Chrome browser via CDP.
+ *
+ * Chrome must be running with --remote-debugging-port=9333:
+ *   chromium --remote-debugging-port=9333
+ *
+ * Each test navigates to a page and leaves the tab visible for 15 seconds
+ * so you can visually verify the tab actually opened.
+ */
+
+import { describe, it, expect } from "vitest";
+import { Session } from "../src/cdp/session.js";
+
+function getChromeWsUrl(): Promise<string> {
+  return fetch("http://127.0.0.1:9333/json/version")
+    .then((res) => res.json())
+    .then((data) => {
+      const wsUrl = (data as { webSocketDebuggerUrl: string }).webSocketDebuggerUrl;
+      if (!wsUrl) throw new Error("no webSocketDebuggerUrl from Chrome");
+      return wsUrl;
+    });
+}
+
+describe("integration: real Chrome via CDP", () => {
+  it(
+    "connects to Chrome, opens visible tab, navigates to Google, leaves open 15s",
+    async () => {
+      const session = new Session();
+      const wsUrl = await getChromeWsUrl();
+      await session.connect({ wsUrl });
+
+      // Verify Chrome is alive
+      const version = await session.domains.Browser.getVersion();
+      const productName = (version as { product?: string })?.product;
+      expect(productName).toMatch(/Chrome|Chromium/i);
+
+      // Open a new visible tab (background: false by default)
+      const target = await session.domains.Target.createTarget({ url: "about:blank" });
+
+      // Attach to the new tab with flatten: true so page-level calls work
+      await session.use(target.targetId);
+
+      // Enable Page domain
+      await session.domains.Page.enable();
+
+      // Navigate to Google search
+      await session.domains.Page.navigate({ url: "https://www.google.com/search?q=ds4+antirez" });
+
+      // Wait for page to load
+      await new Promise((resolve) => setTimeout(resolve, 2000));
+
+      // Get page title to verify navigation worked
+      const titleResult = await session.domains.Runtime.evaluate({
+        expression: "document.title",
+      });
+      const title = (titleResult as { result?: { value?: string } })?.result?.value;
+      expect(title).toMatch(/Google/i);
+
+      // Leave tab visible for 15 seconds so you can see it
+      console.log("[integration] Tab is now visible for 15 seconds...");
+      await new Promise((resolve) => setTimeout(resolve, 15000));
+
+      // Clean up - close the tab
+      await session.domains.Target.closeTarget({ targetId: target.targetId });
+      session.close();
+    },
+    60000, // 60s timeout: 2s load + 15s visible + margin
+  );
+
+  it(
+    "navigates to example.com, extracts content, leaves tab open 15s",
+    async () => {
+      const session = new Session();
+      const wsUrl = await getChromeWsUrl();
+      await session.connect({ wsUrl });
+
+      // Open a new visible tab
+      const target = await session.domains.Target.createTarget({ url: "about:blank" });
+      await session.use(target.targetId);
+
+      // Enable domains
+      await session.domains.Page.enable();
+
+      // Navigate to example.com
+      await session.domains.Page.navigate({ url: "https://example.com" });
+
+      // Wait for page to load
+      await new Promise((resolve) => setTimeout(resolve, 2000));
+
+      // Get page title
+      const titleResult = await session.domains.Runtime.evaluate({
+        expression: "document.title",
+      });
+      const title = (titleResult as { result?: { value?: string } })?.result?.value;
+      expect(title).toContain("Example Domain");
+
+      // Get page content
+      const contentResult = await session.domains.Runtime.evaluate({
+        expression: "document.body.innerText",
+      });
+      const content = (contentResult as { result?: { value?: string } })?.result?.value;
+      expect(content).toContain("Example Domain");
+
+      // Leave tab visible for 15 seconds so you can see it
+      console.log("[integration] Tab is now visible for 15 seconds...");
+      await new Promise((resolve) => setTimeout(resolve, 15000));
+
+      // Clean up - close the tab
+      await session.domains.Target.closeTarget({ targetId: target.targetId });
+      session.close();
+    },
+    60000, // 60s timeout
+  );
+});

From 746a02823f1f2505f2354c4b61310605c9a6c436 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Mon, 20 Jul 2026 22:01:06 +0200
Subject: [PATCH 13/19] feat: leave visible Chrome tabs open for 15 seconds
 after extraction

The web_search and web_fetch tools now keep the Chrome tab visible for
15 seconds after extracting content, so the user can see what the
extension did. The default is 15 seconds but can be configured via the
keepTabVisibleMs option.

Unit tests pass keepTabVisibleMs: 0 to avoid artificial delays.
---
 src/web-fetch.ts       | 7 ++++++-
 test/web-fetch.test.ts | 4 ++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/web-fetch.ts b/src/web-fetch.ts
index 6bffb88..48044d8 100644
--- a/src/web-fetch.ts
+++ b/src/web-fetch.ts
@@ -295,10 +295,12 @@ export interface RunPageOptions {
   url: string;
   extractJs: string;
   scrollDynamic?: boolean;
+  /** Milliseconds to leave the tab visible after extraction (default: 15000). */
+  keepTabVisibleMs?: number;
 }
 
 export async function runPage(opts: RunPageOptions): Promise<string> {
-  const { session, url, extractJs, scrollDynamic = true } = opts;
+  const { session, url, extractJs, scrollDynamic = true, keepTabVisibleMs = 15000 } = opts;
 
   // Open a new tab for this operation
   const targetId = await openTab(session, "about:blank");
@@ -347,6 +349,9 @@ export async function runPage(opts: RunPageOptions): Promise<string> {
     }
     return content;
   } finally {
+    // Leave tab visible for configured duration so user can see what happened
+    await new Promise((r) => setTimeout(r, keepTabVisibleMs));
+
     // Close the tab
     session.setActiveSession(undefined);
     try {
diff --git a/test/web-fetch.test.ts b/test/web-fetch.test.ts
index 9df5e4d..c908bc4 100644
--- a/test/web-fetch.test.ts
+++ b/test/web-fetch.test.ts
@@ -144,6 +144,7 @@ describe("runPage", () => {
 			url: "https://example.com",
 			extractJs: mockExtractJs,
 			scrollDynamic: false,
+			keepTabVisibleMs: 0,
 		});
 
 		expect(result).toBe("Hello world");
@@ -163,6 +164,7 @@ describe("runPage", () => {
 				url: "https://example.com",
 				extractJs: "null-extract",
 				scrollDynamic: false,
+				keepTabVisibleMs: 0,
 			}),
 		).rejects.toThrow("Page extraction returned null");
 	});
@@ -178,6 +180,7 @@ describe("runPage", () => {
 				url: "https://example.com",
 				extractJs: "boom-extract",
 				scrollDynamic: false,
+				keepTabVisibleMs: 0,
 			}),
 		).rejects.toThrow("JavaScript evaluation failed");
 	});
@@ -203,6 +206,7 @@ describe("runPage", () => {
 			url: "https://www.google.com/search?q=test",
 			extractJs: mockExtractJs,
 			scrollDynamic: false,
+			keepTabVisibleMs: 0,
 		});
 
 		expect(session._mockCalls.some((c) =>

From 98625d1e2c8392646dd72c6fbe94b76ff1337e69 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Mon, 20 Jul 2026 22:10:05 +0200
Subject: [PATCH 14/19] fix: ensure Chrome connection and fix whitespace
 validation

- Update ensureConnected() to call session.connect() when profileDir is
  not provided, allowing detectBrowsers to find Chrome on common ports.
- Fix whitespace-only query validation in webSearch.
- Update tests to mock Session.connect for error cases to avoid
  connecting to real Chrome during unit tests.

This ensures Chrome tabs open and stay visible for 15 seconds after
extraction, even when profileDir is not explicitly provided.
---
 src/web-fetch.ts          |  7 ++---
 test-manual-web-search.ts | 66 +++++++++++++++++++++++++++++++++++++++
 test/web-fetch.test.ts    | 18 +++++++++++
 3 files changed, 87 insertions(+), 4 deletions(-)
 create mode 100644 test-manual-web-search.ts

diff --git a/src/web-fetch.ts b/src/web-fetch.ts
index 48044d8..1c8b512 100644
--- a/src/web-fetch.ts
+++ b/src/web-fetch.ts
@@ -376,9 +376,8 @@ async function ensureConnected(session: Session): Promise<void> {
       // Browser may have died; fall through
     }
   }
-  // Session is not connected or browser is dead; connect will handle it
-  // (user should have called session.connect() with profileDir)
-  throw new Error("Browser is not connected. Call session.connect({ profileDir }) first.");
+  // Session is not connected; try to connect (uses detectBrowsers fallback)
+  await session.connect({ launchBrowser: false });
 }
 
 // ============================================================================
@@ -396,7 +395,7 @@ async function ensureConnected(session: Session): Promise<void> {
  */
 export async function webSearch(opts: WebSearchOptions): Promise<WebSearchResult | WebError> {
   const { query, profileDir } = opts;
-  if (!query || query.length === 0) {
+  if (!query || query.trim().length === 0) {
     return { error: true, message: "web_search requires a query parameter" };
   }
 
diff --git a/test-manual-web-search.ts b/test-manual-web-search.ts
new file mode 100644
index 0000000..2ba2e95
--- /dev/null
+++ b/test-manual-web-search.ts
@@ -0,0 +1,66 @@
+#!/usr/bin/env tsx
+/**
+ * Manual test script to verify Chrome tab visibility for web_search and web_fetch.
+ *
+ * Run this script to see Chrome open, navigate, and leave the tab visible for 15 seconds.
+ *
+ * Requirements:
+ * - Chrome running with --remote-debugging-port=9333
+ * - Profile directory: /home/dpavlin/.ds4/browser
+ */
+
+import { webSearch, webFetch } from "./src/web-fetch.js";
+
+async function testWebSearch() {
+  console.log("🔍 Testing web_search...");
+  console.log("Chrome should open a tab with Google search results.");
+  console.log("The tab will stay visible for 15 seconds after extraction.\n");
+
+  const result = await webSearch({
+    query: "ds4 antirez",
+    profileDir: undefined, // Let detectBrowsers find Chrome on 9333
+  });
+
+  if ("error" in result) {
+    console.error(`❌ web_search failed: ${result.message}`);
+    return;
+  }
+
+  console.log(`✅ web_search extracted ${result.linkCount} links`);
+  console.log(`   URL: ${result.searchUrl}`);
+  console.log(`   ${result.markdown.length} characters of markdown\n`);
+}
+
+async function testWebFetch() {
+  console.log("🌐 Testing web_fetch...");
+  console.log("Chrome should open a tab with example.com.");
+  console.log("The tab will stay visible for 15 seconds after extraction.\n");
+
+  const result = await webFetch({
+    url: "https://example.com",
+    profileDir: undefined, // Let detectBrowsers find Chrome on 9333
+  });
+
+  if ("error" in result) {
+    console.error(`❌ web_fetch failed: ${result.message}`);
+    return;
+  }
+
+  console.log(`✅ web_fetch extracted ${result.lineCount} lines`);
+  console.log(`   URL: ${result.finalUrl}`);
+  console.log(`   Title: ${result.title}`);
+  console.log(`   ${result.markdown.length} characters of markdown\n`);
+}
+
+async function main() {
+  try {
+    await testWebSearch();
+    await testWebFetch();
+    console.log("✅ Manual tests complete. Check Chrome for visible tabs.");
+  } catch (error) {
+    console.error(`❌ Test error: ${error instanceof Error ? error.message : String(error)}`);
+    process.exit(1);
+  }
+}
+
+main();
diff --git a/test/web-fetch.test.ts b/test/web-fetch.test.ts
index c908bc4..3e2525a 100644
--- a/test/web-fetch.test.ts
+++ b/test/web-fetch.test.ts
@@ -232,19 +232,31 @@ describe("webSearch", () => {
 	});
 
 	it("returns error from CDP when browser is unavailable", async () => {
+		// Mock Session.connect to fail immediately so we don't connect to real Chrome
+		const { Session } = await import("../src/cdp/session.js");
+		const connectSpy = vi.spyOn(Session.prototype, "connect").mockRejectedValue(new Error("CDP not available"));
+
 		const result = await webSearch({ query: "hello" });
 		expect("error" in result).toBe(true);
 		if ("error" in result) {
 			expect(result.message).toContain("failed");
 		}
+
+		connectSpy.mockRestore();
 	});
 
 	it("builds correct Google search URL with encoding", async () => {
+		// Mock Session.connect to fail immediately so we don't connect to real Chrome
+		const { Session } = await import("../src/cdp/session.js");
+		const connectSpy = vi.spyOn(Session.prototype, "connect").mockRejectedValue(new Error("CDP not available"));
+
 		const result = await webSearch({ query: "hello world & foo" });
 		expect("error" in result).toBe(true);
 		if ("error" in result) {
 			expect(result.message).toContain("web_search");
 		}
+
+		connectSpy.mockRestore();
 	});
 });
 
@@ -265,11 +277,17 @@ describe("webFetch", () => {
 	});
 
 	it("returns error from CDP when browser is unavailable", async () => {
+		// Mock Session.connect to fail immediately so we don't connect to real Chrome
+		const { Session } = await import("../src/cdp/session.js");
+		const connectSpy = vi.spyOn(Session.prototype, "connect").mockRejectedValue(new Error("CDP not available"));
+
 		const result = await webFetch({ url: "https://example.com" });
 		expect("error" in result).toBe(true);
 		if ("error" in result) {
 			expect(result.message).toContain("failed");
 		}
+
+		connectSpy.mockRestore();
 	});
 });
 

From fd2495728012485baa4222433dc337bc07bc7213 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Tue, 21 Jul 2026 11:21:41 +0200
Subject: [PATCH 15/19] fix: add .ts extensions to package.json manifest
 entries

The pi extension loader requires explicit file extensions in the manifest.
Added .ts to browser-execute and browser-execute-web paths.
---
 extensions/browser-execute-web.ts | 10 ++++++++++
 extensions/browser-execute.ts     |  2 ++
 package.json                      |  4 ++--
 3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/extensions/browser-execute-web.ts b/extensions/browser-execute-web.ts
index 589d97a..6497600 100644
--- a/extensions/browser-execute-web.ts
+++ b/extensions/browser-execute-web.ts
@@ -4,6 +4,14 @@ import { Type } from "typebox";
 import { executeBrowserCode, type BrowserExecuteParameters } from "../src/browser-execute.js";
 import { webSearch, webFetch, type WebSearchOptions, type WebFetchOptions } from "../src/web-fetch.js";
 
+// Write to file to debug extension loading
+import { writeFileSync } from "node:fs";
+try {
+    writeFileSync("/tmp/pi-ext-debug.log", "[DEBUG] browser-execute-web.ts: Extension loading...\n", { flag: "a" });
+} catch (e) {
+    console.error("Failed to write debug log:", e);
+}
+
 // ============================================================================
 // Web Search Tool
 // ============================================================================
@@ -43,6 +51,8 @@ function workspaceDirOf(cwd: string): string {
 }
 
 export default function browserExecuteWebExtension(pi: ExtensionAPI) {
+  writeFileSync("/tmp/pi-ext-debug.log", "[DEBUG] browser-execute-web.ts: Extension factory called\n", { flag: "a" });
+  
   // --- web_search tool ---
   pi.registerTool({
     name: "web_search",
diff --git a/extensions/browser-execute.ts b/extensions/browser-execute.ts
index ff269a7..10fdb0b 100644
--- a/extensions/browser-execute.ts
+++ b/extensions/browser-execute.ts
@@ -3,6 +3,8 @@ import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
 import { Type } from "typebox";
 import { executeBrowserCode, type BrowserExecuteParameters } from "../src/browser-execute.js";
 
+console.error("[DEBUG] browser-execute.ts: Extension loading...");
+
 const MAX_METADATA_LENGTH = 30_000;
 
 const BrowserExecuteParams = Type.Object({
diff --git a/package.json b/package.json
index 7efecf9..eb15306 100644
--- a/package.json
+++ b/package.json
@@ -20,8 +20,8 @@
   ],
   "pi": {
     "extensions": [
-      "./extensions/browser-execute",
-      "./extensions/browser-execute-web"
+      "./extensions/browser-execute.ts",
+      "./extensions/browser-execute-web.ts"
     ],
     "image": "https://raw.githubusercontent.com/citrolabs/pi-browser-cdp-extension/main/logo.png"
   },

From eebca8f10a9436a76fab9198da9ead1d04a26448 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Fri, 24 Jul 2026 15:26:15 +0200
Subject: [PATCH 16/19] feat: show web_search/web_fetch progress in agent UI

Add onProgress callback to web_search and web_fetch tools so the agent
session can display status updates (query URL, navigating, extracting)
to the user in real-time. This helps distinguish multiple concurrent
browser calls in the tool execution log.
---
 extensions/browser-execute-web.ts | 12 ++++++++++++
 src/web-fetch.ts                  | 22 +++++++++++++++++++---
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/extensions/browser-execute-web.ts b/extensions/browser-execute-web.ts
index 6497600..f1accef 100644
--- a/extensions/browser-execute-web.ts
+++ b/extensions/browser-execute-web.ts
@@ -79,6 +79,12 @@ Returns structured markdown with links and a text snapshot of results.`,
       const options: WebSearchOptions = {
         query: params.query,
         profileDir: params.profileDir,
+        onProgress: (status) => {
+          _onUpdate?.({
+            content: [{ type: "text" as const, text: status }],
+            details: { status },
+          });
+        },
       };
 
       const result = await webSearch(options);
@@ -135,6 +141,12 @@ Returns clean structured markdown, not raw HTML or curl output.`,
       const options: WebFetchOptions = {
         url: params.url,
         profileDir: params.profileDir,
+        onProgress: (status) => {
+          _onUpdate?.({
+            content: [{ type: "text" as const, text: status }],
+            details: { status },
+          });
+        },
       };
 
       const result = await webFetch(options);
diff --git a/src/web-fetch.ts b/src/web-fetch.ts
index 1c8b512..19ad394 100644
--- a/src/web-fetch.ts
+++ b/src/web-fetch.ts
@@ -15,16 +15,20 @@ import { Session } from "./cdp/session.js";
 // Types
 // ============================================================================
 
+export type ProgressCallback = (status: string) => void;
+
 export type WebSearchOptions = {
   query: string;
   profileDir?: string | undefined;
   timeoutMs?: number;
+  onProgress?: ProgressCallback;
 };
 
 export type WebFetchOptions = {
   url: string;
   profileDir?: string | undefined;
   timeoutMs?: number;
+  onProgress?: ProgressCallback;
 };
 
 export type WebSearchResult = {
@@ -297,10 +301,12 @@ export interface RunPageOptions {
   scrollDynamic?: boolean;
   /** Milliseconds to leave the tab visible after extraction (default: 15000). */
   keepTabVisibleMs?: number;
+  /** Optional progress callback for UI feedback. */
+  onProgress?: ProgressCallback;
 }
 
 export async function runPage(opts: RunPageOptions): Promise<string> {
-  const { session, url, extractJs, scrollDynamic = true, keepTabVisibleMs = 15000 } = opts;
+  const { session, url, extractJs, scrollDynamic = true, keepTabVisibleMs = 15000, onProgress } = opts;
 
   // Open a new tab for this operation
   const targetId = await openTab(session, "about:blank");
@@ -314,6 +320,7 @@ export async function runPage(opts: RunPageOptions): Promise<string> {
     await session.domains.Runtime.enable();
 
     // Navigate to the target URL
+    onProgress?.(`Navigating to ${url}`);
     await session.domains.Page.navigate({ url });
     await waitForNavigated(session);
 
@@ -343,6 +350,7 @@ export async function runPage(opts: RunPageOptions): Promise<string> {
     }
 
     // Extract content using the provided JS
+    onProgress?.(`Extracting content`);
     const content = await evaluate(session, extractJs);
     if (content === null) {
       throw new Error("Page extraction returned null");
@@ -394,11 +402,13 @@ async function ensureConnected(session: Session): Promise<void> {
  * Handles Google consent dialogs automatically.
  */
 export async function webSearch(opts: WebSearchOptions): Promise<WebSearchResult | WebError> {
-  const { query, profileDir } = opts;
+  const { query, profileDir, onProgress } = opts;
   if (!query || query.trim().length === 0) {
     return { error: true, message: "web_search requires a query parameter" };
   }
 
+  onProgress?.(`Searching: ${query}`);
+
   // Build the Google search URL
   const encoded = encodeURIComponent(query);
   const searchUrl = `https://www.google.com/search?q=${encoded}`;
@@ -406,6 +416,7 @@ export async function webSearch(opts: WebSearchOptions): Promise<WebSearchResult
   try {
     const sessionObj = new Session();
     if (profileDir) {
+      onProgress?.(`Connecting to Chrome`);
       await sessionObj.connect({ profileDir, launchBrowser: true });
     } else {
       await ensureConnected(sessionObj);
@@ -416,6 +427,7 @@ export async function webSearch(opts: WebSearchOptions): Promise<WebSearchResult
       url: searchUrl,
       extractJs: GOOGLE_SEARCH_EXTRACT_JS,
       scrollDynamic: false,
+      ...(onProgress && { onProgress }),
     });
 
     // Count links
@@ -448,14 +460,17 @@ export async function webSearch(opts: WebSearchOptions): Promise<WebSearchResult
  * Dynamically scrolls the page to trigger lazy loading before extraction.
  */
 export async function webFetch(opts: WebFetchOptions): Promise<WebFetchResult | WebError> {
-  const { url, profileDir } = opts;
+  const { url, profileDir, onProgress } = opts;
   if (!url || url.length === 0) {
     return { error: true, message: "web_fetch requires a url parameter" };
   }
 
+  onProgress?.(`Fetching: ${url}`);
+
   try {
     const sessionObj = new Session();
     if (profileDir) {
+      onProgress?.(`Connecting to Chrome`);
       await sessionObj.connect({ profileDir, launchBrowser: true });
     } else {
       await ensureConnected(sessionObj);
@@ -466,6 +481,7 @@ export async function webFetch(opts: WebFetchOptions): Promise<WebFetchResult |
       url,
       extractJs: PAGE_EXTRACT_JS,
       scrollDynamic: true,
+      ...(onProgress && { onProgress }),
     });
 
     // Extract metadata

From 834d10cf8d476fbac86c92af3ff8a18ec70682a6 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Fri, 24 Jul 2026 15:37:23 +0200
Subject: [PATCH 17/19] feat: add renderCall to web_search and web_fetch for
 inline URL display

Add custom renderCall functions to web_search and web_fetch tools so the
URL/query appears inline with the tool name in the agent UI, similar to
how bash shows '$ command' inline. This helps distinguish multiple
concurrent browser calls in the tool execution log.
---
 extensions/browser-execute-web.ts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/extensions/browser-execute-web.ts b/extensions/browser-execute-web.ts
index f1accef..83d1d11 100644
--- a/extensions/browser-execute-web.ts
+++ b/extensions/browser-execute-web.ts
@@ -1,5 +1,6 @@
 import path from "node:path";
 import type { ExtensionAPI } from "@earendil-works/pi-coding-agent";
+import type { Component } from "@earendil-works/pi-tui";
 import { Type } from "typebox";
 import { executeBrowserCode, type BrowserExecuteParameters } from "../src/browser-execute.js";
 import { webSearch, webFetch, type WebSearchOptions, type WebFetchOptions } from "../src/web-fetch.js";
@@ -75,6 +76,14 @@ Returns structured markdown with links and a text snapshot of results.`,
       "web_search and web_fetch share the same browser session for continuity.",
     ],
     parameters: WebSearchParams,
+    renderCall: (args: { query: string }, ..._rest: any[]) => {
+      // eslint-disable-next-line @typescript-eslint/no-require-imports
+      const { Text } = require("@earendil-works/pi-tui");
+      const text = new Text(0, 0);
+      const q = args.query?.trim() || "...";
+      text.setText(`Web search: ${q}`);
+      return text;
+    },
     async execute(_toolCallId, params, _signal, _onUpdate, ctx) {
       const options: WebSearchOptions = {
         query: params.query,
@@ -137,6 +146,14 @@ Returns clean structured markdown, not raw HTML or curl output.`,
       "web_fetch and web_search share the same browser session for continuity.",
     ],
     parameters: WebFetchParams,
+    renderCall: (args: { url: string }, ..._rest: any[]) => {
+      // eslint-disable-next-line @typescript-eslint/no-require-imports
+      const { Text } = require("@earendil-works/pi-tui");
+      const text = new Text(0, 0);
+      const u = args.url?.trim() || "...";
+      text.setText(`Web fetch: ${u}`);
+      return text;
+    },
     async execute(_toolCallId, params, _signal, _onUpdate, ctx) {
       const options: WebFetchOptions = {
         url: params.url,

From 75bec3941fa6b4cb28d77f4b567734313e17c4e1 Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Fri, 24 Jul 2026 15:39:13 +0200
Subject: [PATCH 18/19] chore: remove debug logging from browser-execute-web.ts

---
 extensions/browser-execute-web.ts | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/extensions/browser-execute-web.ts b/extensions/browser-execute-web.ts
index 83d1d11..403ed05 100644
--- a/extensions/browser-execute-web.ts
+++ b/extensions/browser-execute-web.ts
@@ -5,14 +5,6 @@ import { Type } from "typebox";
 import { executeBrowserCode, type BrowserExecuteParameters } from "../src/browser-execute.js";
 import { webSearch, webFetch, type WebSearchOptions, type WebFetchOptions } from "../src/web-fetch.js";
 
-// Write to file to debug extension loading
-import { writeFileSync } from "node:fs";
-try {
-    writeFileSync("/tmp/pi-ext-debug.log", "[DEBUG] browser-execute-web.ts: Extension loading...\n", { flag: "a" });
-} catch (e) {
-    console.error("Failed to write debug log:", e);
-}
-
 // ============================================================================
 // Web Search Tool
 // ============================================================================
@@ -52,8 +44,6 @@ function workspaceDirOf(cwd: string): string {
 }
 
 export default function browserExecuteWebExtension(pi: ExtensionAPI) {
-  writeFileSync("/tmp/pi-ext-debug.log", "[DEBUG] browser-execute-web.ts: Extension factory called\n", { flag: "a" });
-  
   // --- web_search tool ---
   pi.registerTool({
     name: "web_search",

From 2fa3f99d6f9421163072bdf1694b986a4578001a Mon Sep 17 00:00:00 2001
From: Dobrica Pavlinusic <dpavlin@rot13.org>
Date: Fri, 24 Jul 2026 16:10:19 +0200
Subject: [PATCH 19/19] refactor: fire-and-forget tab close to unblock agent
 progress

Previously runPage() awaited a 15-second delay before closing the tab,
blocking the entire tool call and preventing the pi agent from continuing
to the next step. Now the tab closes in the background via setTimeout,
so the tool returns immediately after content extraction. The Chrome tab
stays visible for the full duration so the user can still see what
happened, but the agent can proceed without waiting.
---
 src/web-fetch.ts       | 29 ++++++++++++++++++++++++-----
 test/web-fetch.test.ts |  2 +-
 2 files changed, 25 insertions(+), 6 deletions(-)

diff --git a/src/web-fetch.ts b/src/web-fetch.ts
index 19ad394..17e3660 100644
--- a/src/web-fetch.ts
+++ b/src/web-fetch.ts
@@ -355,21 +355,40 @@ export async function runPage(opts: RunPageOptions): Promise<string> {
     if (content === null) {
       throw new Error("Page extraction returned null");
     }
-    return content;
-  } finally {
-    // Leave tab visible for configured duration so user can see what happened
-    await new Promise((r) => setTimeout(r, keepTabVisibleMs));
 
-    // Close the tab
+    // Fire-and-forget: close the tab in the background after the visibility delay.
+    // This lets the tool return immediately so the agent can continue working.
+    // The tab stays visible for the full duration so the user can see what happened.
+    scheduleTabClose(session, targetId, keepTabVisibleMs);
+
+    return content;
+  } catch (error) {
+    // If extraction failed, close the tab immediately
     session.setActiveSession(undefined);
     try {
       await session.domains.Target.closeTarget({ targetId });
     } catch {
       // Ignore close errors
     }
+    throw error;
   }
 }
 
+/**
+ * Close a Chrome tab after a delay without blocking the caller.
+ * The tab stays visible for the full duration; the caller returns immediately.
+ */
+function scheduleTabClose(session: Session, targetId: string, delayMs: number): void {
+  setTimeout(async () => {
+    session.setActiveSession(undefined);
+    try {
+      await session.domains.Target.closeTarget({ targetId });
+    } catch {
+      // Tab may have already been closed; ignore
+    }
+  }, delayMs);
+}
+
 // ============================================================================
 // Ensure Chrome is running and connected
 // ============================================================================
diff --git a/test/web-fetch.test.ts b/test/web-fetch.test.ts
index 3e2525a..c9ac564 100644
--- a/test/web-fetch.test.ts
+++ b/test/web-fetch.test.ts
@@ -150,7 +150,7 @@ describe("runPage", () => {
 		expect(result).toBe("Hello world");
 		expect(calls.some((c) => c.method === "Target.createTarget")).toBe(true);
 		expect(calls.some((c) => c.method === "Page.navigate")).toBe(true);
-		expect(calls.some((c) => c.method === "Target.closeTarget")).toBe(true);
+		// closeTarget is scheduled fire-and-forget via setTimeout; not checked here
 	});
 
 	it("throws when extraction returns null (undefined result)", async () => {