diff --git a/lerna.json b/lerna.json
index 75243372..2aa0ead9 100644
--- a/lerna.json
+++ b/lerna.json
@@ -2,6 +2,6 @@
   "packages": [
     "packages/*"
   ],
-  "version": "0.8.69",
+  "version": "0.8.70-beta",
   "npmClient": "yarn"
 }
\ No newline at end of file
diff --git a/package.json b/package.json
index d85e4dd7..e0d36b83 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "clarity",
   "private": true,
-  "version": "0.8.69",
+  "version": "0.8.70-beta",
   "repository": "git+https://github.com/microsoft/clarity.git",
   "author": "Sarvesh Nagpal <sarveshn@microsoft.com>",
   "license": "MIT",
diff --git a/packages/clarity-decode/package.json b/packages/clarity-decode/package.json
index 2fdbbe0e..d573d0c4 100644
--- a/packages/clarity-decode/package.json
+++ b/packages/clarity-decode/package.json
@@ -1,6 +1,6 @@
 {
   "name": "clarity-decode",
-  "version": "0.8.69",
+  "version": "0.8.70-beta",
   "description": "An analytics library that uses web page interactions to generate aggregated insights",
   "author": "Microsoft Corp.",
   "license": "MIT",
@@ -26,7 +26,7 @@
     "url": "https://github.com/Microsoft/clarity/issues"
   },
   "dependencies": {
-    "clarity-js": "^0.8.69"
+    "clarity-js": "^0.8.70-beta"
   },
   "devDependencies": {
     "@rollup/plugin-commonjs": "^24.0.0",
diff --git a/packages/clarity-devtools/package.json b/packages/clarity-devtools/package.json
index 20283015..0c382271 100644
--- a/packages/clarity-devtools/package.json
+++ b/packages/clarity-devtools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "clarity-devtools",
-  "version": "0.8.69",
+  "version": "0.8.70-beta",
   "private": true,
   "description": "Adds Clarity debugging support to browser devtools",
   "author": "Microsoft Corp.",
@@ -24,9 +24,9 @@
     "url": "https://github.com/Microsoft/clarity/issues"
   },
   "dependencies": {
-    "clarity-decode": "^0.8.69",
-    "clarity-js": "^0.8.69",
-    "clarity-visualize": "^0.8.69"
+    "clarity-decode": "^0.8.70-beta",
+    "clarity-js": "^0.8.70-beta",
+    "clarity-visualize": "^0.8.70-beta"
   },
   "devDependencies": {
     "@rollup/plugin-node-resolve": "^15.0.0",
diff --git a/packages/clarity-devtools/static/manifest.json b/packages/clarity-devtools/static/manifest.json
index 0d8a667b..38c7e452 100644
--- a/packages/clarity-devtools/static/manifest.json
+++ b/packages/clarity-devtools/static/manifest.json
@@ -2,8 +2,8 @@
   "manifest_version": 3,
   "name": "Microsoft Clarity Developer Tools",
   "description": "Clarity helps you understand how users are interacting with your website.",
-  "version": "0.8.69",
-  "version_name": "0.8.69",
+  "version": "0.8.70",
+  "version_name": "0.8.70-beta",
   "minimum_chrome_version": "88",
   "devtools_page": "devtools.html",
   "icons": {
diff --git a/packages/clarity-js/package.json b/packages/clarity-js/package.json
index 4653e36f..a8d8a588 100644
--- a/packages/clarity-js/package.json
+++ b/packages/clarity-js/package.json
@@ -1,6 +1,6 @@
 {
   "name": "clarity-js",
-  "version": "0.8.69",
+  "version": "0.8.70-beta",
   "description": "An analytics library that uses web page interactions to generate aggregated insights",
   "author": "Microsoft Corp.",
   "license": "MIT",
diff --git a/packages/clarity-js/src/core/version.ts b/packages/clarity-js/src/core/version.ts
index 1c290300..0fe3af37 100644
--- a/packages/clarity-js/src/core/version.ts
+++ b/packages/clarity-js/src/core/version.ts
@@ -1,2 +1,2 @@
-let version = "0.8.69";
+let version = "0.8.70-beta";
 export default version;
diff --git a/packages/clarity-js/src/layout/agent.ts b/packages/clarity-js/src/layout/agent.ts
new file mode 100644
index 00000000..8158a3c2
--- /dev/null
+++ b/packages/clarity-js/src/layout/agent.ts
@@ -0,0 +1,24 @@
+import { AgenticBrowserSignal, Dimension } from "@clarity-types/data";
+import * as dimension from "@src/data/dimension";
+
+export function detect(id: string): void {
+    let signal = identify(id);
+    if (signal) { dimension.log(Dimension.AgenticBrowserSignal, signal.toString()); }
+}
+
+function identify(id: string): AgenticBrowserSignal {
+    switch (id) {
+        case "claude-agent-glow-border":
+            return AgenticBrowserSignal.ClaudeAgentGlowBorder;
+        case "claude-agent-glow-border-inner":
+            return AgenticBrowserSignal.ClaudeAgentGlowBorderInner;
+        case "claude-agent-stop-container":
+            return AgenticBrowserSignal.ClaudeAgentStopContainer;
+        case "claude-agent-stop-button":
+            return AgenticBrowserSignal.ClaudeAgentStopButton;
+        case "claude-phantom-cursor":
+            return AgenticBrowserSignal.ClaudePhantomCursor;
+        default:
+            return AgenticBrowserSignal.None;
+    }
+}
diff --git a/packages/clarity-js/src/layout/node.ts b/packages/clarity-js/src/layout/node.ts
index c5d1af3c..453ae6ab 100644
--- a/packages/clarity-js/src/layout/node.ts
+++ b/packages/clarity-js/src/layout/node.ts
@@ -11,6 +11,7 @@ import * as interaction from "@src/interaction";
 import * as mutation from "@src/layout/mutation";
 import * as schema from "@src/layout/schema";
 import * as custom from "@src/layout/custom";
+import * as agent from "@src/layout/agent";
 import { checkDocumentStyles } from "@src/layout/style";
 import { electron } from "@src/data/metadata";
 
@@ -94,6 +95,8 @@ export default function (node: Node, source: Source, timestamp: number): Node {
             let element = (node as HTMLElement);
             let tag = element.tagName;
             let attributes = getAttributes(element);
+            let id = attributes[Constant.Id];
+            if (id) { agent.detect(id); }
             // In some cases, external libraries like vue-fragment, can modify parentNode property to not be in sync with the DOM
             // For correctness, we first look at parentElement and if it not present then fall back to using parentNode
             parent = node.parentElement ? node.parentElement : (node.parentNode ? node.parentNode as HTMLElement : null);
diff --git a/packages/clarity-js/types/data.d.ts b/packages/clarity-js/types/data.d.ts
index 061ef0c0..6efecfa6 100644
--- a/packages/clarity-js/types/data.d.ts
+++ b/packages/clarity-js/types/data.d.ts
@@ -183,7 +183,8 @@ export const enum Dimension {
     TimezoneOffset = 35,
     Consent = 36,
     InteractionNextPaint = 37,
-    GlobalPrivacyControl = 38
+    GlobalPrivacyControl = 38,
+    AgenticBrowserSignal = 39
     // 200-300 reserved for internal use
 }
 
@@ -233,6 +234,15 @@ export const enum BooleanFlag {
     True = 1
 }
 
+export const enum AgenticBrowserSignal {
+    None = 0,
+    ClaudeAgentGlowBorder = 1,
+    ClaudeAgentGlowBorderInner = 2,
+    ClaudeAgentStopContainer = 3,
+    ClaudeAgentStopButton = 4,
+    ClaudePhantomCursor = 5
+}
+
 export const enum GCMConsent {
     Unknown = 0,
     Granted = 1,
diff --git a/packages/clarity-visualize/package.json b/packages/clarity-visualize/package.json
index c99e491d..4b251322 100644
--- a/packages/clarity-visualize/package.json
+++ b/packages/clarity-visualize/package.json
@@ -1,6 +1,6 @@
 {
   "name": "clarity-visualize",
-  "version": "0.8.69",
+  "version": "0.8.70-beta",
   "description": "An analytics library that uses web page interactions to generate aggregated insights",
   "author": "Microsoft Corp.",
   "license": "MIT",
@@ -27,7 +27,7 @@
     "url": "https://github.com/Microsoft/clarity/issues"
   },
   "dependencies": {
-    "clarity-decode": "^0.8.69"
+    "clarity-decode": "^0.8.70-beta"
   },
   "devDependencies": {
     "@rollup/plugin-commonjs": "^24.0.0",
diff --git a/test/agentic-browser.test.ts b/test/agentic-browser.test.ts
new file mode 100644
index 00000000..996e1afa
--- /dev/null
+++ b/test/agentic-browser.test.ts
@@ -0,0 +1,154 @@
+import { expect, test } from "@playwright/test";
+import { decode } from "clarity-decode";
+import { readFileSync } from "fs";
+import { resolve } from "path";
+import { pathToFileURL } from "url";
+import type { Page } from "@playwright/test";
+import type { Data } from "clarity-decode";
+
+declare global {
+    interface Window {
+        clarity: (method: string, ...args: any[]) => void;
+        payloads: string[];
+    }
+}
+
+const AgenticBrowserSignalDimension = 39;
+const Signals = {
+    ClaudeAgentGlowBorder: "1",
+    ClaudeAgentGlowBorderInner: "2",
+    ClaudeAgentStopContainer: "3",
+    ClaudeAgentStopButton: "4",
+    ClaudePhantomCursor: "5",
+} as const;
+
+async function start(page: Page, markup: string = ""): Promise<void> {
+    const htmlPath = resolve(__dirname, "./html/core.html");
+    const htmlFileUrl = pathToFileURL(htmlPath).toString();
+    const html = readFileSync(htmlPath, "utf8");
+    const clarity = readFileSync(resolve(__dirname, "../packages/clarity-js/build/clarity.min.js"), "utf8");
+    await page.goto(htmlFileUrl);
+    await page.setContent(html.replace("</body>", `${markup}
+        <script>
+          window.payloads = [];
+          ${clarity};
+          clarity("start", {
+            delay: 50,
+            projectId: "test",
+            upload: (payload) => { window.payloads.push(payload); }
+          });
+        </script>
+        </body>
+    `));
+}
+
+async function collect(page: Page): Promise<string[]> {
+    await page.waitForTimeout(300);
+    await page.evaluate((): void => window.clarity("stop"));
+    await page.waitForFunction("window.payloads.length > 0");
+    const payloads = await page.evaluate((): string[] => window.payloads);
+    const signals: string[] = [];
+    for (const payload of payloads.map((value: string): Data.DecodedPayload => decode(value))) {
+        for (const event of payload.dimension || []) {
+            if (event.data && event.data[AgenticBrowserSignalDimension]) {
+                signals.push(...event.data[AgenticBrowserSignalDimension]);
+            }
+        }
+    }
+    return signals;
+}
+
+test.describe("Agentic browser markers", (): void => {
+    test("captures the Claude marker family", async ({ page }): Promise<void> => {
+        await start(page, `
+            <div id="claude-agent-glow-border"></div>
+            <div id="claude-agent-glow-border-inner"></div>
+            <div id="claude-agent-stop-container"></div>
+            <button id="claude-agent-stop-button"></button>
+            <div id="claude-phantom-cursor"></div>
+        `);
+
+        expect((await collect(page)).sort()).toEqual(Object.values(Signals).sort());
+    });
+
+    test("captures a marker inserted after load", async ({ page }): Promise<void> => {
+        await start(page);
+        await page.evaluate((): void => {
+            const marker = document.createElement("div");
+            marker.id = "claude-agent-glow-border";
+            document.body.appendChild(marker);
+        });
+
+        expect(await collect(page)).toEqual([Signals.ClaudeAgentGlowBorder]);
+    });
+
+    test("captures an id assigned after insertion", async ({ page }): Promise<void> => {
+        await start(page);
+        await page.evaluate((): void => {
+            const marker = document.createElement("div");
+            marker.id = "pending-marker";
+            document.body.appendChild(marker);
+        });
+        await page.waitForTimeout(150);
+        await page.evaluate((): void => {
+            document.getElementById("pending-marker").id = "claude-agent-stop-container";
+        });
+
+        expect(await collect(page)).toEqual([Signals.ClaudeAgentStopContainer]);
+    });
+
+    test("retains a transient marker removed before upload", async ({ page }): Promise<void> => {
+        await start(page);
+        await page.evaluate((): void => {
+            const marker = document.createElement("button");
+            marker.id = "claude-agent-stop-button";
+            document.body.appendChild(marker);
+            marker.remove();
+        });
+
+        expect(await collect(page)).toEqual([Signals.ClaudeAgentStopButton]);
+    });
+
+    test("emits each marker once per page", async ({ page }): Promise<void> => {
+        await start(page);
+        await page.evaluate((): void => {
+            for (let i = 0; i < 2; i++) {
+                const marker = document.createElement("div");
+                marker.id = "claude-phantom-cursor";
+                document.body.appendChild(marker);
+            }
+        });
+
+        expect(await collect(page)).toEqual([Signals.ClaudePhantomCursor]);
+    });
+
+    test("captures a marker in an open shadow root", async ({ page }): Promise<void> => {
+        await start(page);
+        await page.evaluate((): void => {
+            const host = document.createElement("div");
+            document.body.appendChild(host);
+            const marker = document.createElement("div");
+            marker.id = "claude-phantom-cursor";
+            host.attachShadow({ mode: "open" }).appendChild(marker);
+        });
+
+        expect(await collect(page)).toEqual([Signals.ClaudePhantomCursor]);
+    });
+
+    test("captures a marker in a same-origin iframe", async ({ page }): Promise<void> => {
+        await start(page);
+        await page.evaluate((): void => {
+            const frame = document.createElement("iframe");
+            frame.srcdoc = "<div id='claude-agent-stop-button'></div>";
+            document.body.appendChild(frame);
+        });
+
+        expect(await collect(page)).toEqual([Signals.ClaudeAgentStopButton]);
+    });
+
+    test("does not emit a dimension for similar ids", async ({ page }): Promise<void> => {
+        await start(page, `<div id="claude-agent-stop-container-copy"></div>`);
+
+        expect(await collect(page)).toEqual([]);
+    });
+});