From 0a874c4c87c0ce4fc7b205ee54c83ad832ec920e Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Tue, 25 Jun 2024 20:51:08 -0700
Subject: [PATCH 01/15] community[minor]: Add ChromeAI chat model

---
 .../src/chat_models/chrome.ts                 | 181 ++++++++++++++++++
 .../chat_models/tests/chromeai.int.test.ts    |   0
 2 files changed, 181 insertions(+)
 create mode 100644 libs/langchain-community/src/chat_models/chrome.ts
 create mode 100644 libs/langchain-community/src/chat_models/tests/chromeai.int.test.ts

diff --git a/libs/langchain-community/src/chat_models/chrome.ts b/libs/langchain-community/src/chat_models/chrome.ts
new file mode 100644
index 000000000000..fca4c36a7b0e
--- /dev/null
+++ b/libs/langchain-community/src/chat_models/chrome.ts
@@ -0,0 +1,181 @@
+import {
+  SimpleChatModel,
+  type BaseChatModelParams,
+} from "@langchain/core/language_models/chat_models";
+import type { BaseLanguageModelCallOptions } from "@langchain/core/language_models/base";
+import { CallbackManagerForLLMRun } from "@langchain/core/callbacks/manager";
+import { BaseMessage, AIMessageChunk } from "@langchain/core/messages";
+import { ChatGenerationChunk } from "@langchain/core/outputs";
+
+export interface AI {
+  canCreateTextSession(): Promise<AIModelAvailability>;
+  createTextSession(options?: AITextSessionOptions): Promise<AITextSession>;
+  defaultTextSessionOptions(): Promise<AITextSessionOptions>;
+}
+
+export interface AITextSession {
+  prompt(input: string): Promise<string>;
+  promptStreaming(input: string): ReadableStream;
+  destroy(): void;
+  clone(): AITextSession;
+}
+
+export interface AITextSessionOptions {
+  topK: number;
+  temperature: number;
+}
+
+export enum AIModelAvailability {
+  Readily = "readily",
+  AfterDownload = "after-download",
+  No = "no",
+}
+
+export interface ChromeAIInputs extends BaseChatModelParams {
+  topK?: number;
+  temperature?: number;
+}
+
+export interface ChromeAICallOptions extends BaseLanguageModelCallOptions {}
+
+function formatPrompt(messages: BaseMessage[]): string {
+  return messages
+    .map((message) => {
+      if (typeof message.content !== "string") {
+        throw new Error(
+          "ChatChromeAI does not support non-string message content."
+        );
+      }
+      return `<${message._getType()}>\n${
+        message.content
+      }\n</${message._getType()}>`;
+    })
+    .join("\n");
+}
+
+/**
+ * To use this model you need to have the `Built-in AI Early Preview Program`
+ * for Chrome. You can find more information about the program here:
+ * @link https://developer.chrome.com/docs/ai/built-in
+ *
+ * @example
+ * ```typescript
+ * // Initialize the ChatChromeAI model.
+ * const model = new ChatChromeAI({
+ *   temperature: 0.5, // Optional. Default is 0.5.
+ *   topK: 40, // Optional. Default is 40.
+ * });
+ *
+ * // Call the model with a message and await the response.
+ * const response = await model.invoke([
+ *   new HumanMessage({ content: "My name is John." }),
+ * ]);
+ * ```
+ */
+export class ChatChromeAI extends SimpleChatModel<ChromeAICallOptions> {
+  session?: AITextSession;
+
+  temperature = 0.5;
+
+  topK = 40;
+
+  static lc_name() {
+    return "ChatChromeAI";
+  }
+
+  constructor(inputs: ChromeAIInputs) {
+    super(inputs);
+    this.temperature = inputs.temperature ?? this.temperature;
+    this.topK = inputs.topK ?? this.topK;
+  }
+
+  _llmType() {
+    return "chrome-ai";
+  }
+
+  /**
+   * Initialize the model. This method must be called before calling `.invoke()`.
+   */
+  async initialize() {
+    if (typeof window === "undefined") {
+      throw new Error("ChatChromeAI can only be used in the browser.");
+    }
+
+    const ai: AI = (window as any).ai;
+    const canCreateTextSession = await ai.canCreateTextSession();
+    if (canCreateTextSession === AIModelAvailability.No) {
+      throw new Error("The AI model is not available.");
+    } else if (canCreateTextSession === AIModelAvailability.AfterDownload) {
+      throw new Error("The AI model is not yet downloaded.");
+    }
+
+    this.session = await ai.createTextSession({
+      topK: this.topK,
+      temperature: this.temperature,
+    });
+  }
+
+  /**
+   * Call `.destroy()` to free resources if you no longer need a session.
+   * When a session is destroyed, it can no longer be used, and any ongoing
+   * execution will be aborted. You may want to keep the session around if
+   * you intend to prompt the model often since creating a session can take
+   * some time.
+   */
+  destroy() {
+    if (!this.session) {
+      return console.log("No session found. Returning.");
+    }
+    this.session.destroy();
+  }
+
+  async *_streamResponseChunks(
+    messages: BaseMessage[],
+    _options: this["ParsedCallOptions"],
+    runManager?: CallbackManagerForLLMRun
+  ): AsyncGenerator<ChatGenerationChunk> {
+    if (!this.session) {
+      throw new Error("Session not found. Please call `.initialize()` first.");
+    }
+    const textPrompt = formatPrompt(messages);
+
+    const stream = this.session.promptStreaming(textPrompt);
+    const reader = stream.getReader();
+
+    try {
+      let previousLength = 0;
+      while (true) {
+        const { done, value } = await reader.read();
+        if (done) break;
+        const newContent = value.slice(previousLength);
+        previousLength = value.length;
+        yield new ChatGenerationChunk({
+          text: newContent,
+          message: new AIMessageChunk({
+            content: newContent,
+            additional_kwargs: {},
+          }),
+        });
+        await runManager?.handleLLMNewToken(newContent);
+      }
+    } finally {
+      reader.releaseLock();
+    }
+  }
+
+  async _call(
+    messages: BaseMessage[],
+    options: this["ParsedCallOptions"],
+    runManager?: CallbackManagerForLLMRun
+  ): Promise<string> {
+    const chunks = [];
+    for await (const chunk of this._streamResponseChunks(
+      messages,
+      options,
+      runManager
+    )) {
+      chunks.push(chunk.text);
+    }
+    return chunks.join("");
+  }
+}
diff --git a/libs/langchain-community/src/chat_models/tests/chromeai.int.test.ts b/libs/langchain-community/src/chat_models/tests/chromeai.int.test.ts
new file mode 100644
index 000000000000..e69de29bb2d1

From 007f5eefa989c2580e3fdf7dcdd45974f670b28e Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Tue, 25 Jun 2024 21:03:04 -0700
Subject: [PATCH 02/15] extra

---
 libs/langchain-community/.gitignore           |  4 +++
 libs/langchain-community/langchain.config.js  |  1 +
 libs/langchain-community/package.json         | 13 ++++++++
 .../chat_models/{chrome.ts => chrome_ai.ts}   |  0
 .../src/chat_models/tests/chrome_ai.html      | 32 +++++++++++++++++++
 .../chat_models/tests/chromeai.int.test.ts    |  0
 .../src/load/import_map.ts                    |  1 +
 7 files changed, 51 insertions(+)
 rename libs/langchain-community/src/chat_models/{chrome.ts => chrome_ai.ts} (100%)
 create mode 100644 libs/langchain-community/src/chat_models/tests/chrome_ai.html
 delete mode 100644 libs/langchain-community/src/chat_models/tests/chromeai.int.test.ts

diff --git a/libs/langchain-community/.gitignore b/libs/langchain-community/.gitignore
index 4246a650f6df..018fa12549f4 100644
--- a/libs/langchain-community/.gitignore
+++ b/libs/langchain-community/.gitignore
@@ -518,6 +518,10 @@ chat_models/cloudflare_workersai.cjs
 chat_models/cloudflare_workersai.js
 chat_models/cloudflare_workersai.d.ts
 chat_models/cloudflare_workersai.d.cts
+chat_models/chrome_ai.cjs
+chat_models/chrome_ai.js
+chat_models/chrome_ai.d.ts
+chat_models/chrome_ai.d.cts
 chat_models/deepinfra.cjs
 chat_models/deepinfra.js
 chat_models/deepinfra.d.ts
diff --git a/libs/langchain-community/langchain.config.js b/libs/langchain-community/langchain.config.js
index 7012d8e06c5a..21ff77dcb69c 100644
--- a/libs/langchain-community/langchain.config.js
+++ b/libs/langchain-community/langchain.config.js
@@ -166,6 +166,7 @@ export const config = {
     "chat_models/bedrock": "chat_models/bedrock/index",
     "chat_models/bedrock/web": "chat_models/bedrock/web",
     "chat_models/cloudflare_workersai": "chat_models/cloudflare_workersai",
+    "chat_models/chrome_ai": "chat_models/chrome_ai",
     "chat_models/deepinfra": "chat_models/deepinfra",
     "chat_models/fireworks": "chat_models/fireworks",
     "chat_models/friendli": "chat_models/friendli",
diff --git a/libs/langchain-community/package.json b/libs/langchain-community/package.json
index 3ef6acbe7890..1c499d0f6fb0 100644
--- a/libs/langchain-community/package.json
+++ b/libs/langchain-community/package.json
@@ -1870,6 +1870,15 @@
       "import": "./chat_models/cloudflare_workersai.js",
       "require": "./chat_models/cloudflare_workersai.cjs"
     },
+    "./chat_models/chrome_ai": {
+      "types": {
+        "import": "./chat_models/chrome_ai.d.ts",
+        "require": "./chat_models/chrome_ai.d.cts",
+        "default": "./chat_models/chrome_ai.d.ts"
+      },
+      "import": "./chat_models/chrome_ai.js",
+      "require": "./chat_models/chrome_ai.cjs"
+    },
     "./chat_models/deepinfra": {
       "types": {
         "import": "./chat_models/deepinfra.d.ts",
@@ -3555,6 +3564,10 @@
     "chat_models/cloudflare_workersai.js",
     "chat_models/cloudflare_workersai.d.ts",
     "chat_models/cloudflare_workersai.d.cts",
+    "chat_models/chrome_ai.cjs",
+    "chat_models/chrome_ai.js",
+    "chat_models/chrome_ai.d.ts",
+    "chat_models/chrome_ai.d.cts",
     "chat_models/deepinfra.cjs",
     "chat_models/deepinfra.js",
     "chat_models/deepinfra.d.ts",
diff --git a/libs/langchain-community/src/chat_models/chrome.ts b/libs/langchain-community/src/chat_models/chrome_ai.ts
similarity index 100%
rename from libs/langchain-community/src/chat_models/chrome.ts
rename to libs/langchain-community/src/chat_models/chrome_ai.ts
diff --git a/libs/langchain-community/src/chat_models/tests/chrome_ai.html b/libs/langchain-community/src/chat_models/tests/chrome_ai.html
new file mode 100644
index 000000000000..4d1575458137
--- /dev/null
+++ b/libs/langchain-community/src/chat_models/tests/chrome_ai.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <title>ChatChromeAI Example</title>
+</head>
+<body>
+  <h1>ChatChromeAI Example</h1>
+  
+  <form id="inputForm">
+    <label for="inputField">Enter your input:</label><br>
+    <input type="text" id="inputField" name="inputField"><br>
+    <button type="submit">Submit</button>
+  </form>
+  
+  <script type="module">
+    import { ChatChromeAI } from '../../../dist/chat_models/chrome_ai.js';
+    
+    const model = new ChatChromeAI();
+    
+    document.getElementById('inputForm').addEventListener('submit', async (event) => {
+      event.preventDefault();
+      
+      const input = document.getElementById('inputField').value;
+      const humanMessage = ["human", input]
+      
+      for await (const chunk of await model.stream(humanMessage)) {
+        console.log(chunk);
+      }
+    });
+  </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/libs/langchain-community/src/chat_models/tests/chromeai.int.test.ts b/libs/langchain-community/src/chat_models/tests/chromeai.int.test.ts
deleted file mode 100644
index e69de29bb2d1..000000000000
diff --git a/libs/langchain-community/src/load/import_map.ts b/libs/langchain-community/src/load/import_map.ts
index d06053cbde26..907dcc90ed59 100644
--- a/libs/langchain-community/src/load/import_map.ts
+++ b/libs/langchain-community/src/load/import_map.ts
@@ -46,6 +46,7 @@ export * as vectorstores__vectara from "../vectorstores/vectara.js";
 export * as chat_models__alibaba_tongyi from "../chat_models/alibaba_tongyi.js";
 export * as chat_models__baiduwenxin from "../chat_models/baiduwenxin.js";
 export * as chat_models__cloudflare_workersai from "../chat_models/cloudflare_workersai.js";
+export * as chat_models__chrome_ai from "../chat_models/chrome_ai.js";
 export * as chat_models__deepinfra from "../chat_models/deepinfra.js";
 export * as chat_models__fireworks from "../chat_models/fireworks.js";
 export * as chat_models__friendli from "../chat_models/friendli.js";

From 2f2ade8a7efa9a6517e30990a44518e5d6e71694 Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Tue, 25 Jun 2024 21:03:44 -0700
Subject: [PATCH 03/15] chore: lint files

---
 .../src/chat_models/tests/chrome_ai.html      | 62 ++++++++++---------
 1 file changed, 32 insertions(+), 30 deletions(-)

diff --git a/libs/langchain-community/src/chat_models/tests/chrome_ai.html b/libs/langchain-community/src/chat_models/tests/chrome_ai.html
index 4d1575458137..d9c7bbb1c87b 100644
--- a/libs/langchain-community/src/chat_models/tests/chrome_ai.html
+++ b/libs/langchain-community/src/chat_models/tests/chrome_ai.html
@@ -1,32 +1,34 @@
 <!DOCTYPE html>
 <html>
-<head>
-  <title>ChatChromeAI Example</title>
-</head>
-<body>
-  <h1>ChatChromeAI Example</h1>
-  
-  <form id="inputForm">
-    <label for="inputField">Enter your input:</label><br>
-    <input type="text" id="inputField" name="inputField"><br>
-    <button type="submit">Submit</button>
-  </form>
-  
-  <script type="module">
-    import { ChatChromeAI } from '../../../dist/chat_models/chrome_ai.js';
-    
-    const model = new ChatChromeAI();
-    
-    document.getElementById('inputForm').addEventListener('submit', async (event) => {
-      event.preventDefault();
-      
-      const input = document.getElementById('inputField').value;
-      const humanMessage = ["human", input]
-      
-      for await (const chunk of await model.stream(humanMessage)) {
-        console.log(chunk);
-      }
-    });
-  </script>
-</body>
-</html>
\ No newline at end of file
+  <head>
+    <title>ChatChromeAI Example</title>
+  </head>
+  <body>
+    <h1>ChatChromeAI Example</h1>
+
+    <form id="inputForm">
+      <label for="inputField">Enter your input:</label><br />
+      <input type="text" id="inputField" name="inputField" /><br />
+      <button type="submit">Submit</button>
+    </form>
+
+    <script type="module">
+      import { ChatChromeAI } from "../../../dist/chat_models/chrome_ai.js";
+
+      const model = new ChatChromeAI();
+
+      document
+        .getElementById("inputForm")
+        .addEventListener("submit", async (event) => {
+          event.preventDefault();
+
+          const input = document.getElementById("inputField").value;
+          const humanMessage = ["human", input];
+
+          for await (const chunk of await model.stream(humanMessage)) {
+            console.log(chunk);
+          }
+        });
+    </script>
+  </body>
+</html>

From b83c14c7cab7769e2df44179f25f0a4b894b4c24 Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Wed, 26 Jun 2024 10:46:14 -0700
Subject: [PATCH 04/15] move to experimental, add demo app and instructions

---
 .../test-exports-bun/src/entrypoints.js       |    1 +
 .../test-exports-cf/src/entrypoints.js        |    1 +
 .../test-exports-cjs/src/entrypoints.js       |    1 +
 .../test-exports-esbuild/src/entrypoints.js   |    1 +
 .../test-exports-esm/src/entrypoints.js       |    1 +
 .../test-exports-vercel/src/entrypoints.js    |    1 +
 .../test-exports-vite/src/entrypoints.js      |    1 +
 langchain/.gitignore                          |    4 +
 langchain/langchain.config.js                 |    1 +
 langchain/package.json                        |   13 +
 .../src/experimental/chrome_ai/app/README.md  |   22 +
 .../experimental/chrome_ai/app/package.json   |   16 +
 .../chrome_ai/app/src/chrome_ai.html          |   91 +
 .../experimental/chrome_ai/app/src/index.js   |   65 +
 .../chrome_ai/app/webpack.config.js           |   10 +
 .../src/experimental/chrome_ai/app/yarn.lock  | 2221 +++++++++++++++++
 .../src/experimental/chrome_ai/chat_models.ts |    6 +-
 langchain/src/load/import_map.ts              |    1 +
 .../src/chat_models/tests/chrome_ai.html      |   34 -
 19 files changed, 2453 insertions(+), 38 deletions(-)
 create mode 100644 langchain/src/experimental/chrome_ai/app/README.md
 create mode 100644 langchain/src/experimental/chrome_ai/app/package.json
 create mode 100644 langchain/src/experimental/chrome_ai/app/src/chrome_ai.html
 create mode 100644 langchain/src/experimental/chrome_ai/app/src/index.js
 create mode 100644 langchain/src/experimental/chrome_ai/app/webpack.config.js
 create mode 100644 langchain/src/experimental/chrome_ai/app/yarn.lock
 rename libs/langchain-community/src/chat_models/chrome_ai.ts => langchain/src/experimental/chrome_ai/chat_models.ts (97%)
 delete mode 100644 libs/langchain-community/src/chat_models/tests/chrome_ai.html

diff --git a/environment_tests/test-exports-bun/src/entrypoints.js b/environment_tests/test-exports-bun/src/entrypoints.js
index 0127a63d1c08..bef03d471759 100644
--- a/environment_tests/test-exports-bun/src/entrypoints.js
+++ b/environment_tests/test-exports-bun/src/entrypoints.js
@@ -68,6 +68,7 @@ export * from "langchain/experimental/babyagi";
 export * from "langchain/experimental/generative_agents";
 export * from "langchain/experimental/plan_and_execute";
 export * from "langchain/experimental/chains/violation_of_expectations";
+export * from "langchain/experimental/chat_models/chrome_ai";
 export * from "langchain/experimental/masking";
 export * from "langchain/experimental/prompts/custom_format";
 export * from "langchain/evaluation";
diff --git a/environment_tests/test-exports-cf/src/entrypoints.js b/environment_tests/test-exports-cf/src/entrypoints.js
index 0127a63d1c08..bef03d471759 100644
--- a/environment_tests/test-exports-cf/src/entrypoints.js
+++ b/environment_tests/test-exports-cf/src/entrypoints.js
@@ -68,6 +68,7 @@ export * from "langchain/experimental/babyagi";
 export * from "langchain/experimental/generative_agents";
 export * from "langchain/experimental/plan_and_execute";
 export * from "langchain/experimental/chains/violation_of_expectations";
+export * from "langchain/experimental/chat_models/chrome_ai";
 export * from "langchain/experimental/masking";
 export * from "langchain/experimental/prompts/custom_format";
 export * from "langchain/evaluation";
diff --git a/environment_tests/test-exports-cjs/src/entrypoints.js b/environment_tests/test-exports-cjs/src/entrypoints.js
index 5f9a19db39f2..7c30db491b23 100644
--- a/environment_tests/test-exports-cjs/src/entrypoints.js
+++ b/environment_tests/test-exports-cjs/src/entrypoints.js
@@ -68,6 +68,7 @@ const experimental_babyagi = require("langchain/experimental/babyagi");
 const experimental_generative_agents = require("langchain/experimental/generative_agents");
 const experimental_plan_and_execute = require("langchain/experimental/plan_and_execute");
 const experimental_chains_violation_of_expectations = require("langchain/experimental/chains/violation_of_expectations");
+const experimental_chat_models_chrome_ai = require("langchain/experimental/chat_models/chrome_ai");
 const experimental_masking = require("langchain/experimental/masking");
 const experimental_prompts_custom_format = require("langchain/experimental/prompts/custom_format");
 const evaluation = require("langchain/evaluation");
diff --git a/environment_tests/test-exports-esbuild/src/entrypoints.js b/environment_tests/test-exports-esbuild/src/entrypoints.js
index d3b76a743d8a..693bc1eab6b7 100644
--- a/environment_tests/test-exports-esbuild/src/entrypoints.js
+++ b/environment_tests/test-exports-esbuild/src/entrypoints.js
@@ -68,6 +68,7 @@ import * as experimental_babyagi from "langchain/experimental/babyagi";
 import * as experimental_generative_agents from "langchain/experimental/generative_agents";
 import * as experimental_plan_and_execute from "langchain/experimental/plan_and_execute";
 import * as experimental_chains_violation_of_expectations from "langchain/experimental/chains/violation_of_expectations";
+import * as experimental_chat_models_chrome_ai from "langchain/experimental/chat_models/chrome_ai";
 import * as experimental_masking from "langchain/experimental/masking";
 import * as experimental_prompts_custom_format from "langchain/experimental/prompts/custom_format";
 import * as evaluation from "langchain/evaluation";
diff --git a/environment_tests/test-exports-esm/src/entrypoints.js b/environment_tests/test-exports-esm/src/entrypoints.js
index d3b76a743d8a..693bc1eab6b7 100644
--- a/environment_tests/test-exports-esm/src/entrypoints.js
+++ b/environment_tests/test-exports-esm/src/entrypoints.js
@@ -68,6 +68,7 @@ import * as experimental_babyagi from "langchain/experimental/babyagi";
 import * as experimental_generative_agents from "langchain/experimental/generative_agents";
 import * as experimental_plan_and_execute from "langchain/experimental/plan_and_execute";
 import * as experimental_chains_violation_of_expectations from "langchain/experimental/chains/violation_of_expectations";
+import * as experimental_chat_models_chrome_ai from "langchain/experimental/chat_models/chrome_ai";
 import * as experimental_masking from "langchain/experimental/masking";
 import * as experimental_prompts_custom_format from "langchain/experimental/prompts/custom_format";
 import * as evaluation from "langchain/evaluation";
diff --git a/environment_tests/test-exports-vercel/src/entrypoints.js b/environment_tests/test-exports-vercel/src/entrypoints.js
index 0127a63d1c08..bef03d471759 100644
--- a/environment_tests/test-exports-vercel/src/entrypoints.js
+++ b/environment_tests/test-exports-vercel/src/entrypoints.js
@@ -68,6 +68,7 @@ export * from "langchain/experimental/babyagi";
 export * from "langchain/experimental/generative_agents";
 export * from "langchain/experimental/plan_and_execute";
 export * from "langchain/experimental/chains/violation_of_expectations";
+export * from "langchain/experimental/chat_models/chrome_ai";
 export * from "langchain/experimental/masking";
 export * from "langchain/experimental/prompts/custom_format";
 export * from "langchain/evaluation";
diff --git a/environment_tests/test-exports-vite/src/entrypoints.js b/environment_tests/test-exports-vite/src/entrypoints.js
index 0127a63d1c08..bef03d471759 100644
--- a/environment_tests/test-exports-vite/src/entrypoints.js
+++ b/environment_tests/test-exports-vite/src/entrypoints.js
@@ -68,6 +68,7 @@ export * from "langchain/experimental/babyagi";
 export * from "langchain/experimental/generative_agents";
 export * from "langchain/experimental/plan_and_execute";
 export * from "langchain/experimental/chains/violation_of_expectations";
+export * from "langchain/experimental/chat_models/chrome_ai";
 export * from "langchain/experimental/masking";
 export * from "langchain/experimental/prompts/custom_format";
 export * from "langchain/evaluation";
diff --git a/langchain/.gitignore b/langchain/.gitignore
index 0047dee6bc98..d24052476339 100644
--- a/langchain/.gitignore
+++ b/langchain/.gitignore
@@ -510,6 +510,10 @@ experimental/chains/violation_of_expectations.cjs
 experimental/chains/violation_of_expectations.js
 experimental/chains/violation_of_expectations.d.ts
 experimental/chains/violation_of_expectations.d.cts
+experimental/chat_models/chrome_ai.cjs
+experimental/chat_models/chrome_ai.js
+experimental/chat_models/chrome_ai.d.ts
+experimental/chat_models/chrome_ai.d.cts
 experimental/masking.cjs
 experimental/masking.js
 experimental/masking.d.ts
diff --git a/langchain/langchain.config.js b/langchain/langchain.config.js
index d086a9e2cdb8..7d7e227eece9 100644
--- a/langchain/langchain.config.js
+++ b/langchain/langchain.config.js
@@ -190,6 +190,7 @@ export const config = {
     "experimental/plan_and_execute": "experimental/plan_and_execute/index",
     "experimental/chains/violation_of_expectations":
       "experimental/chains/violation_of_expectations/index",
+    "experimental/chat_models/chrome_ai": "experimental/chrome_ai/chat_models",
     "experimental/masking": "experimental/masking/index",
     "experimental/prompts/custom_format": "experimental/prompts/custom_format",
     "experimental/prompts/handlebars": "experimental/prompts/handlebars",
diff --git a/langchain/package.json b/langchain/package.json
index 9bd804d77d0c..5c632daf14d5 100644
--- a/langchain/package.json
+++ b/langchain/package.json
@@ -522,6 +522,10 @@
     "experimental/chains/violation_of_expectations.js",
     "experimental/chains/violation_of_expectations.d.ts",
     "experimental/chains/violation_of_expectations.d.cts",
+    "experimental/chat_models/chrome_ai.cjs",
+    "experimental/chat_models/chrome_ai.js",
+    "experimental/chat_models/chrome_ai.d.ts",
+    "experimental/chat_models/chrome_ai.d.cts",
     "experimental/masking.cjs",
     "experimental/masking.js",
     "experimental/masking.d.ts",
@@ -2075,6 +2079,15 @@
       "import": "./experimental/chains/violation_of_expectations.js",
       "require": "./experimental/chains/violation_of_expectations.cjs"
     },
+    "./experimental/chat_models/chrome_ai": {
+      "types": {
+        "import": "./experimental/chat_models/chrome_ai.d.ts",
+        "require": "./experimental/chat_models/chrome_ai.d.cts",
+        "default": "./experimental/chat_models/chrome_ai.d.ts"
+      },
+      "import": "./experimental/chat_models/chrome_ai.js",
+      "require": "./experimental/chat_models/chrome_ai.cjs"
+    },
     "./experimental/masking": {
       "types": {
         "import": "./experimental/masking.d.ts",
diff --git a/langchain/src/experimental/chrome_ai/app/README.md b/langchain/src/experimental/chrome_ai/app/README.md
new file mode 100644
index 000000000000..9ec6cd46f989
--- /dev/null
+++ b/langchain/src/experimental/chrome_ai/app/README.md
@@ -0,0 +1,22 @@
+# ChatChromeAI
+
+This is a simple application designed to run in the browser that uses the webGPU and Gemini Nano.
+Gemini Nano is a LLM which Google Chrome has embedded in the browser. As of 06/26/2024 it is still in beta. To request access or find more information, please visit [this link](https://developer.chrome.com/docs/ai/built-in).
+
+## Getting Started
+
+To run this application, you'll first need to build the locally dependencies. From the root of the `langchain-ai/langchainjs` repo, run the following command:
+
+```bash
+yarn build --filter=langchain --filter=@langchain/openai
+```
+
+Once the dependencies are built, navigate into this directory (`langchain/src/experimental/chrome_ai/app`) and run the following command:
+
+```bash
+yarn install # install the dependencies
+
+yarn start # start the application
+```
+
+Then, open your browser and navigate to [`http://127.0.0.1:8080/src/chrome_ai.html`](http://127.0.0.1:8080/src/chrome_ai.html).
\ No newline at end of file
diff --git a/langchain/src/experimental/chrome_ai/app/package.json b/langchain/src/experimental/chrome_ai/app/package.json
new file mode 100644
index 000000000000..00549bbcbf7a
--- /dev/null
+++ b/langchain/src/experimental/chrome_ai/app/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "chrome_ai",
+  "packageManager": "yarn@3.4.1",
+  "scripts": {
+    "start": "rm -rf ./dist && yarn webpack && yarn http-server -c-1 -p 8080"
+  },
+  "devDependencies": {
+    "http-server": "^14.0.1",
+    "webpack": "^5.92.1",
+    "webpack-cli": "^5.1.4"
+  },
+  "dependencies": {
+    "@langchain/openai": "file:../../../../../libs/langchain-openai",
+    "langchain": "file:../../../../"
+  }
+}
diff --git a/langchain/src/experimental/chrome_ai/app/src/chrome_ai.html b/langchain/src/experimental/chrome_ai/app/src/chrome_ai.html
new file mode 100644
index 000000000000..045b2f161328
--- /dev/null
+++ b/langchain/src/experimental/chrome_ai/app/src/chrome_ai.html
@@ -0,0 +1,91 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>ChatChromeAI Example</title>
+    <style>
+      body {
+        font-family: Arial, sans-serif;
+        max-width: 800px;
+        margin: 0 auto;
+        padding: 20px;
+        background-color: #f0f0f0;
+      }
+      h1 {
+        color: #333;
+        text-align: center;
+      }
+      button {
+        background-color: #4CAF50;
+        border: none;
+        color: white;
+        padding: 10px 20px;
+        text-align: center;
+        text-decoration: none;
+        display: inline-block;
+        font-size: 16px;
+        margin: 4px 2px;
+        cursor: pointer;
+        border-radius: 4px;
+      }
+      #destroyButton {
+        background-color: #f44336;
+      }
+      form {
+        background-color: white;
+        padding: 20px;
+        border-radius: 8px;
+        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+      }
+      input[type="text"] {
+        width: 100%;
+        padding: 12px 20px;
+        margin: 8px 0;
+        box-sizing: border-box;
+        border: 2px solid #ccc;
+        border-radius: 4px;
+      }
+      #responseContainer {
+        background-color: white;
+        padding: 20px;
+        border-radius: 8px;
+        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+        margin-top: 20px;
+      }
+      .stats {
+        display: flex;
+        justify-content: space-around;
+        margin-top: 10px;
+      }
+      .stat-pill {
+        padding: 5px 10px;
+        border-radius: 20px;
+        font-size: 14px;
+        color: white;
+      }
+    </style>
+  </head>
+  <body>
+    <h1>LangChain.js🦜🔗 - ChatChromeAI Example</h1>
+
+    <button id="destroyButton">Destroy Model</button>
+
+    <form id="inputForm">
+      <label for="inputField">Enter your input:</label><br />
+      <input type="text" id="inputField" name="inputField" autocomplete="off" /><br />
+      <button type="submit">Submit</button>
+    </form>
+
+    <div id="responseContainer">
+      <div id="responseText"></div>
+      <div id="statsContainer">
+        <div class="stats">
+          <span class="stat-pill" style="background-color: #3498db;" id="firstTokenTime">First Token: -- ms</span>
+          <span class="stat-pill" style="background-color: #2ecc71;" id="totalTime">Total Time: -- ms</span>
+          <span class="stat-pill" style="background-color: #e74c3c;" id="totalTokens">Total Tokens: --</span>
+        </div>
+      </div>
+    </div>
+
+    <script src="../dist/bundle.js"></script>
+  </body>
+</html>
\ No newline at end of file
diff --git a/langchain/src/experimental/chrome_ai/app/src/index.js b/langchain/src/experimental/chrome_ai/app/src/index.js
new file mode 100644
index 000000000000..2177722979ed
--- /dev/null
+++ b/langchain/src/experimental/chrome_ai/app/src/index.js
@@ -0,0 +1,65 @@
+import { ChatChromeAI } from "langchain/experimental/chat_models/chrome_ai";
+import { encodingForModel } from "@langchain/core/utils/tiktoken";
+
+const model = new ChatChromeAI({ callbacks: {} });
+const destroyButton = document.getElementById("destroyButton");
+const inputForm = document.getElementById("inputForm");
+const submitButton = inputForm.querySelector("button[type='submit']");
+
+// Initialize the model when the page loads
+window.addEventListener("load", async () => {
+  try {
+    await model.initialize();
+    destroyButton.disabled = false;
+    submitButton.disabled = false;
+  } catch (error) {
+    console.error("Failed to initialize model:", error);
+    alert("Failed to initialize model. Please try refreshing the page.");
+  }
+});
+
+destroyButton.addEventListener("click", () => {
+  model.destroy();
+  destroyButton.disabled = true;
+  submitButton.disabled = true;
+});
+
+inputForm.addEventListener("submit", async (event) => {
+  event.preventDefault();
+  const input = document.getElementById("inputField").value;
+  const humanMessage = ["human", input];
+
+  // Clear previous response
+  const responseTextElement = document.getElementById("responseText");
+  responseTextElement.textContent = "";
+
+  let fullMsg = "";
+  let timeToFirstTokenMs = 0;
+  let totalTimeMs = 0;
+  try {
+    const startTime = performance.now();
+    for await (const chunk of await model.stream(humanMessage)) {
+      if (timeToFirstTokenMs === 0) {
+        timeToFirstTokenMs = performance.now() - startTime;
+      }
+      fullMsg += chunk.content;
+      // Update the response element with the new content
+      responseTextElement.textContent = fullMsg;
+    }
+    totalTimeMs = performance.now() - startTime;
+  } catch (error) {
+    console.error("An error occurred:", error);
+    responseTextElement.textContent = "An error occurred: " + error.message;
+  }
+
+  const encoding = await encodingForModel("gpt2");
+  const numTokens = encoding.encode(fullMsg).length;
+
+  // Update the stat pills
+  console.log(`First Token: ${Math.round(timeToFirstTokenMs)} ms`);
+  console.log(`Total Time: ${Math.round(totalTimeMs)} ms`);
+  console.log(`Total Tokens: ${numTokens}`);
+  document.getElementById("firstTokenTime").textContent = `First Token: ${Math.round(timeToFirstTokenMs)} ms`;
+  document.getElementById("totalTime").textContent = `Total Time: ${Math.round(totalTimeMs)} ms`;
+  document.getElementById("totalTokens").textContent = `Total Tokens: ${numTokens}`;
+});
diff --git a/langchain/src/experimental/chrome_ai/app/webpack.config.js b/langchain/src/experimental/chrome_ai/app/webpack.config.js
new file mode 100644
index 000000000000..5f8d3209edd2
--- /dev/null
+++ b/langchain/src/experimental/chrome_ai/app/webpack.config.js
@@ -0,0 +1,10 @@
+const path = require('path');
+
+module.exports = {
+  entry: './src/index.js',
+  output: {
+    filename: 'bundle.js',
+    path: path.resolve(__dirname, 'dist'),
+  },
+  mode: 'development',
+};
\ No newline at end of file
diff --git a/langchain/src/experimental/chrome_ai/app/yarn.lock b/langchain/src/experimental/chrome_ai/app/yarn.lock
new file mode 100644
index 000000000000..9e4d598304f4
--- /dev/null
+++ b/langchain/src/experimental/chrome_ai/app/yarn.lock
@@ -0,0 +1,2221 @@
+# This file is generated by running "yarn install" inside your project.
+# Manual changes might be lost - proceed with caution!
+
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+  cacheKey: 8
+
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+"@langchain/core@npm:>0.2.0 <0.3.0, @langchain/core@npm:>=0.2.8 <0.3.0, @langchain/core@npm:~0.2.0":
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+  dependencies:
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+    decamelize: 1.2.0
+    js-tiktoken: ^1.0.12
+    langsmith: ~0.1.30
+    ml-distance: ^4.0.0
+    mustache: ^4.2.0
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+    p-retry: 4
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+    js-tiktoken: ^1.0.12
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+    "@webpack-cli/serve": ^2.0.5
+    colorette: ^2.0.14
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+    cross-spawn: ^7.0.3
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+    fastest-levenshtein: ^1.0.12
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+    webpack-dev-server:
+      optional: true
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+    wildcard: ^2.0.0
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+    "@types/estree": ^1.0.5
+    "@webassemblyjs/ast": ^1.12.1
+    "@webassemblyjs/wasm-edit": ^1.12.1
+    "@webassemblyjs/wasm-parser": ^1.12.1
+    acorn: ^8.7.1
+    acorn-import-attributes: ^1.9.5
+    browserslist: ^4.21.10
+    chrome-trace-event: ^1.0.2
+    enhanced-resolve: ^5.17.0
+    es-module-lexer: ^1.2.1
+    eslint-scope: 5.1.1
+    events: ^3.2.0
+    glob-to-regexp: ^0.4.1
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+    json-parse-even-better-errors: ^2.3.1
+    loader-runner: ^4.2.0
+    mime-types: ^2.1.27
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+    tapable: ^2.1.1
+    terser-webpack-plugin: ^5.3.10
+    watchpack: ^2.4.1
+    webpack-sources: ^3.2.3
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+      optional: true
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+"zod-to-json-schema@npm:^3.22.3":
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+  resolution: "zod-to-json-schema@npm:3.23.1"
+  peerDependencies:
+    zod: ^3.23.3
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+  languageName: node
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+"zod@npm:^3.22.4":
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+  resolution: "zod@npm:3.23.8"
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diff --git a/libs/langchain-community/src/chat_models/chrome_ai.ts b/langchain/src/experimental/chrome_ai/chat_models.ts
similarity index 97%
rename from libs/langchain-community/src/chat_models/chrome_ai.ts
rename to langchain/src/experimental/chrome_ai/chat_models.ts
index fca4c36a7b0e..05251a2bc24b 100644
--- a/libs/langchain-community/src/chat_models/chrome_ai.ts
+++ b/langchain/src/experimental/chrome_ai/chat_models.ts
@@ -25,7 +25,7 @@ export interface AITextSessionOptions {
   temperature: number;
 }
 
-export enum AIModelAvailability {
+export const enum AIModelAvailability {
   Readily = "readily",
   AfterDownload = "after-download",
   No = "no",
@@ -46,9 +46,7 @@ function formatPrompt(messages: BaseMessage[]): string {
           "ChatChromeAI does not support non-string message content."
         );
       }
-      return `<${message._getType()}>\n${
-        message.content
-      }\n</${message._getType()}>`;
+      return `${message._getType()}: ${message.content}`;
     })
     .join("\n");
 }
diff --git a/langchain/src/load/import_map.ts b/langchain/src/load/import_map.ts
index 115793fcac92..69f3fe8fac5c 100644
--- a/langchain/src/load/import_map.ts
+++ b/langchain/src/load/import_map.ts
@@ -59,6 +59,7 @@ export * as experimental__babyagi from "../experimental/babyagi/index.js";
 export * as experimental__generative_agents from "../experimental/generative_agents/index.js";
 export * as experimental__plan_and_execute from "../experimental/plan_and_execute/index.js";
 export * as experimental__chains__violation_of_expectations from "../experimental/chains/violation_of_expectations/index.js";
+export * as experimental__chat_models__chrome_ai from "../experimental/chrome_ai/chat_models.js";
 export * as experimental__masking from "../experimental/masking/index.js";
 export * as experimental__prompts__custom_format from "../experimental/prompts/custom_format.js";
 export * as evaluation from "../evaluation/index.js";
diff --git a/libs/langchain-community/src/chat_models/tests/chrome_ai.html b/libs/langchain-community/src/chat_models/tests/chrome_ai.html
deleted file mode 100644
index d9c7bbb1c87b..000000000000
--- a/libs/langchain-community/src/chat_models/tests/chrome_ai.html
+++ /dev/null
@@ -1,34 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>ChatChromeAI Example</title>
-  </head>
-  <body>
-    <h1>ChatChromeAI Example</h1>
-
-    <form id="inputForm">
-      <label for="inputField">Enter your input:</label><br />
-      <input type="text" id="inputField" name="inputField" /><br />
-      <button type="submit">Submit</button>
-    </form>
-
-    <script type="module">
-      import { ChatChromeAI } from "../../../dist/chat_models/chrome_ai.js";
-
-      const model = new ChatChromeAI();
-
-      document
-        .getElementById("inputForm")
-        .addEventListener("submit", async (event) => {
-          event.preventDefault();
-
-          const input = document.getElementById("inputField").value;
-          const humanMessage = ["human", input];
-
-          for await (const chunk of await model.stream(humanMessage)) {
-            console.log(chunk);
-          }
-        });
-    </script>
-  </body>
-</html>

From 2d9303bc576d7261d5fe7f07ce67d3d4e54c735e Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Wed, 26 Jun 2024 10:47:13 -0700
Subject: [PATCH 05/15] chore: lint files

---
 .../src/experimental/chrome_ai/app/README.md  |  2 +-
 .../chrome_ai/app/src/chrome_ai.html          | 36 ++++++++++++++-----
 .../experimental/chrome_ai/app/src/index.js   | 12 +++++--
 .../chrome_ai/app/webpack.config.js           | 12 +++----
 .../src/experimental/chrome_ai/chat_models.ts |  2 +-
 5 files changed, 45 insertions(+), 19 deletions(-)

diff --git a/langchain/src/experimental/chrome_ai/app/README.md b/langchain/src/experimental/chrome_ai/app/README.md
index 9ec6cd46f989..aa0cc34642b3 100644
--- a/langchain/src/experimental/chrome_ai/app/README.md
+++ b/langchain/src/experimental/chrome_ai/app/README.md
@@ -19,4 +19,4 @@ yarn install # install the dependencies
 yarn start # start the application
 ```
 
-Then, open your browser and navigate to [`http://127.0.0.1:8080/src/chrome_ai.html`](http://127.0.0.1:8080/src/chrome_ai.html).
\ No newline at end of file
+Then, open your browser and navigate to [`http://127.0.0.1:8080/src/chrome_ai.html`](http://127.0.0.1:8080/src/chrome_ai.html).
diff --git a/langchain/src/experimental/chrome_ai/app/src/chrome_ai.html b/langchain/src/experimental/chrome_ai/app/src/chrome_ai.html
index 045b2f161328..f08f7131e587 100644
--- a/langchain/src/experimental/chrome_ai/app/src/chrome_ai.html
+++ b/langchain/src/experimental/chrome_ai/app/src/chrome_ai.html
@@ -15,7 +15,7 @@
         text-align: center;
       }
       button {
-        background-color: #4CAF50;
+        background-color: #4caf50;
         border: none;
         color: white;
         padding: 10px 20px;
@@ -34,7 +34,7 @@
         background-color: white;
         padding: 20px;
         border-radius: 8px;
-        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
       }
       input[type="text"] {
         width: 100%;
@@ -48,7 +48,7 @@
         background-color: white;
         padding: 20px;
         border-radius: 8px;
-        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+        box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
         margin-top: 20px;
       }
       .stats {
@@ -71,7 +71,12 @@ <h1>LangChain.js🦜🔗 - ChatChromeAI Example</h1>
 
     <form id="inputForm">
       <label for="inputField">Enter your input:</label><br />
-      <input type="text" id="inputField" name="inputField" autocomplete="off" /><br />
+      <input
+        type="text"
+        id="inputField"
+        name="inputField"
+        autocomplete="off"
+      /><br />
       <button type="submit">Submit</button>
     </form>
 
@@ -79,13 +84,28 @@ <h1>LangChain.js🦜🔗 - ChatChromeAI Example</h1>
       <div id="responseText"></div>
       <div id="statsContainer">
         <div class="stats">
-          <span class="stat-pill" style="background-color: #3498db;" id="firstTokenTime">First Token: -- ms</span>
-          <span class="stat-pill" style="background-color: #2ecc71;" id="totalTime">Total Time: -- ms</span>
-          <span class="stat-pill" style="background-color: #e74c3c;" id="totalTokens">Total Tokens: --</span>
+          <span
+            class="stat-pill"
+            style="background-color: #3498db"
+            id="firstTokenTime"
+            >First Token: -- ms</span
+          >
+          <span
+            class="stat-pill"
+            style="background-color: #2ecc71"
+            id="totalTime"
+            >Total Time: -- ms</span
+          >
+          <span
+            class="stat-pill"
+            style="background-color: #e74c3c"
+            id="totalTokens"
+            >Total Tokens: --</span
+          >
         </div>
       </div>
     </div>
 
     <script src="../dist/bundle.js"></script>
   </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/langchain/src/experimental/chrome_ai/app/src/index.js b/langchain/src/experimental/chrome_ai/app/src/index.js
index 2177722979ed..2ceea0ad2e24 100644
--- a/langchain/src/experimental/chrome_ai/app/src/index.js
+++ b/langchain/src/experimental/chrome_ai/app/src/index.js
@@ -59,7 +59,13 @@ inputForm.addEventListener("submit", async (event) => {
   console.log(`First Token: ${Math.round(timeToFirstTokenMs)} ms`);
   console.log(`Total Time: ${Math.round(totalTimeMs)} ms`);
   console.log(`Total Tokens: ${numTokens}`);
-  document.getElementById("firstTokenTime").textContent = `First Token: ${Math.round(timeToFirstTokenMs)} ms`;
-  document.getElementById("totalTime").textContent = `Total Time: ${Math.round(totalTimeMs)} ms`;
-  document.getElementById("totalTokens").textContent = `Total Tokens: ${numTokens}`;
+  document.getElementById(
+    "firstTokenTime"
+  ).textContent = `First Token: ${Math.round(timeToFirstTokenMs)} ms`;
+  document.getElementById("totalTime").textContent = `Total Time: ${Math.round(
+    totalTimeMs
+  )} ms`;
+  document.getElementById(
+    "totalTokens"
+  ).textContent = `Total Tokens: ${numTokens}`;
 });
diff --git a/langchain/src/experimental/chrome_ai/app/webpack.config.js b/langchain/src/experimental/chrome_ai/app/webpack.config.js
index 5f8d3209edd2..b61b991f68b1 100644
--- a/langchain/src/experimental/chrome_ai/app/webpack.config.js
+++ b/langchain/src/experimental/chrome_ai/app/webpack.config.js
@@ -1,10 +1,10 @@
-const path = require('path');
+const path = require("path");
 
 module.exports = {
-  entry: './src/index.js',
+  entry: "./src/index.js",
   output: {
-    filename: 'bundle.js',
-    path: path.resolve(__dirname, 'dist'),
+    filename: "bundle.js",
+    path: path.resolve(__dirname, "dist"),
   },
-  mode: 'development',
-};
\ No newline at end of file
+  mode: "development",
+};
diff --git a/langchain/src/experimental/chrome_ai/chat_models.ts b/langchain/src/experimental/chrome_ai/chat_models.ts
index 05251a2bc24b..0b83a5c11548 100644
--- a/langchain/src/experimental/chrome_ai/chat_models.ts
+++ b/langchain/src/experimental/chrome_ai/chat_models.ts
@@ -99,7 +99,7 @@ export class ChatChromeAI extends SimpleChatModel<ChromeAICallOptions> {
       throw new Error("ChatChromeAI can only be used in the browser.");
     }
 
-    const ai: AI = (window as any).ai;
+    const {ai} = window as any;
     const canCreateTextSession = await ai.canCreateTextSession();
     if (canCreateTextSession === AIModelAvailability.No) {
       throw new Error("The AI model is not available.");

From a9eb87a6bd7380b8cb5db4e32ff3fe9d7ef528b5 Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Wed, 26 Jun 2024 10:47:58 -0700
Subject: [PATCH 06/15] cr

---
 libs/langchain-community/.gitignore                 |  4 ----
 libs/langchain-community/chat_models/chrome_ai.cjs  |  1 +
 .../langchain-community/chat_models/chrome_ai.d.cts |  1 +
 libs/langchain-community/chat_models/chrome_ai.d.ts |  1 +
 libs/langchain-community/chat_models/chrome_ai.js   |  1 +
 libs/langchain-community/langchain.config.js        |  1 -
 libs/langchain-community/package.json               | 13 -------------
 libs/langchain-community/src/load/import_map.ts     |  1 -
 8 files changed, 4 insertions(+), 19 deletions(-)
 create mode 100644 libs/langchain-community/chat_models/chrome_ai.cjs
 create mode 100644 libs/langchain-community/chat_models/chrome_ai.d.cts
 create mode 100644 libs/langchain-community/chat_models/chrome_ai.d.ts
 create mode 100644 libs/langchain-community/chat_models/chrome_ai.js

diff --git a/libs/langchain-community/.gitignore b/libs/langchain-community/.gitignore
index 018fa12549f4..4246a650f6df 100644
--- a/libs/langchain-community/.gitignore
+++ b/libs/langchain-community/.gitignore
@@ -518,10 +518,6 @@ chat_models/cloudflare_workersai.cjs
 chat_models/cloudflare_workersai.js
 chat_models/cloudflare_workersai.d.ts
 chat_models/cloudflare_workersai.d.cts
-chat_models/chrome_ai.cjs
-chat_models/chrome_ai.js
-chat_models/chrome_ai.d.ts
-chat_models/chrome_ai.d.cts
 chat_models/deepinfra.cjs
 chat_models/deepinfra.js
 chat_models/deepinfra.d.ts
diff --git a/libs/langchain-community/chat_models/chrome_ai.cjs b/libs/langchain-community/chat_models/chrome_ai.cjs
new file mode 100644
index 000000000000..2a0c111f92e4
--- /dev/null
+++ b/libs/langchain-community/chat_models/chrome_ai.cjs
@@ -0,0 +1 @@
+module.exports = require('../dist/chat_models/chrome_ai.cjs');
\ No newline at end of file
diff --git a/libs/langchain-community/chat_models/chrome_ai.d.cts b/libs/langchain-community/chat_models/chrome_ai.d.cts
new file mode 100644
index 000000000000..40caf3c9f60f
--- /dev/null
+++ b/libs/langchain-community/chat_models/chrome_ai.d.cts
@@ -0,0 +1 @@
+export * from '../dist/chat_models/chrome_ai.js'
\ No newline at end of file
diff --git a/libs/langchain-community/chat_models/chrome_ai.d.ts b/libs/langchain-community/chat_models/chrome_ai.d.ts
new file mode 100644
index 000000000000..40caf3c9f60f
--- /dev/null
+++ b/libs/langchain-community/chat_models/chrome_ai.d.ts
@@ -0,0 +1 @@
+export * from '../dist/chat_models/chrome_ai.js'
\ No newline at end of file
diff --git a/libs/langchain-community/chat_models/chrome_ai.js b/libs/langchain-community/chat_models/chrome_ai.js
new file mode 100644
index 000000000000..40caf3c9f60f
--- /dev/null
+++ b/libs/langchain-community/chat_models/chrome_ai.js
@@ -0,0 +1 @@
+export * from '../dist/chat_models/chrome_ai.js'
\ No newline at end of file
diff --git a/libs/langchain-community/langchain.config.js b/libs/langchain-community/langchain.config.js
index 21ff77dcb69c..7012d8e06c5a 100644
--- a/libs/langchain-community/langchain.config.js
+++ b/libs/langchain-community/langchain.config.js
@@ -166,7 +166,6 @@ export const config = {
     "chat_models/bedrock": "chat_models/bedrock/index",
     "chat_models/bedrock/web": "chat_models/bedrock/web",
     "chat_models/cloudflare_workersai": "chat_models/cloudflare_workersai",
-    "chat_models/chrome_ai": "chat_models/chrome_ai",
     "chat_models/deepinfra": "chat_models/deepinfra",
     "chat_models/fireworks": "chat_models/fireworks",
     "chat_models/friendli": "chat_models/friendli",
diff --git a/libs/langchain-community/package.json b/libs/langchain-community/package.json
index 1c499d0f6fb0..3ef6acbe7890 100644
--- a/libs/langchain-community/package.json
+++ b/libs/langchain-community/package.json
@@ -1870,15 +1870,6 @@
       "import": "./chat_models/cloudflare_workersai.js",
       "require": "./chat_models/cloudflare_workersai.cjs"
     },
-    "./chat_models/chrome_ai": {
-      "types": {
-        "import": "./chat_models/chrome_ai.d.ts",
-        "require": "./chat_models/chrome_ai.d.cts",
-        "default": "./chat_models/chrome_ai.d.ts"
-      },
-      "import": "./chat_models/chrome_ai.js",
-      "require": "./chat_models/chrome_ai.cjs"
-    },
     "./chat_models/deepinfra": {
       "types": {
         "import": "./chat_models/deepinfra.d.ts",
@@ -3564,10 +3555,6 @@
     "chat_models/cloudflare_workersai.js",
     "chat_models/cloudflare_workersai.d.ts",
     "chat_models/cloudflare_workersai.d.cts",
-    "chat_models/chrome_ai.cjs",
-    "chat_models/chrome_ai.js",
-    "chat_models/chrome_ai.d.ts",
-    "chat_models/chrome_ai.d.cts",
     "chat_models/deepinfra.cjs",
     "chat_models/deepinfra.js",
     "chat_models/deepinfra.d.ts",
diff --git a/libs/langchain-community/src/load/import_map.ts b/libs/langchain-community/src/load/import_map.ts
index 907dcc90ed59..d06053cbde26 100644
--- a/libs/langchain-community/src/load/import_map.ts
+++ b/libs/langchain-community/src/load/import_map.ts
@@ -46,7 +46,6 @@ export * as vectorstores__vectara from "../vectorstores/vectara.js";
 export * as chat_models__alibaba_tongyi from "../chat_models/alibaba_tongyi.js";
 export * as chat_models__baiduwenxin from "../chat_models/baiduwenxin.js";
 export * as chat_models__cloudflare_workersai from "../chat_models/cloudflare_workersai.js";
-export * as chat_models__chrome_ai from "../chat_models/chrome_ai.js";
 export * as chat_models__deepinfra from "../chat_models/deepinfra.js";
 export * as chat_models__fireworks from "../chat_models/fireworks.js";
 export * as chat_models__friendli from "../chat_models/friendli.js";

From a3e0c251e0301000afa5f7d41f1c32284ecc656c Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Wed, 26 Jun 2024 10:48:56 -0700
Subject: [PATCH 07/15] cr

---
 langchain/src/experimental/chrome_ai/app/src/index.js | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/langchain/src/experimental/chrome_ai/app/src/index.js b/langchain/src/experimental/chrome_ai/app/src/index.js
index 2ceea0ad2e24..9c1197736f47 100644
--- a/langchain/src/experimental/chrome_ai/app/src/index.js
+++ b/langchain/src/experimental/chrome_ai/app/src/index.js
@@ -56,9 +56,6 @@ inputForm.addEventListener("submit", async (event) => {
   const numTokens = encoding.encode(fullMsg).length;
 
   // Update the stat pills
-  console.log(`First Token: ${Math.round(timeToFirstTokenMs)} ms`);
-  console.log(`Total Time: ${Math.round(totalTimeMs)} ms`);
-  console.log(`Total Tokens: ${numTokens}`);
   document.getElementById(
     "firstTokenTime"
   ).textContent = `First Token: ${Math.round(timeToFirstTokenMs)} ms`;

From 611114ca92b1bdac3210b8b4090babe8beb930ff Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Wed, 26 Jun 2024 10:55:11 -0700
Subject: [PATCH 08/15] chore: lint files

---
 .../src/experimental/chrome_ai/chat_models.ts | 36 ++++++++-----------
 .../chat_models/chrome_ai.cjs                 |  1 -
 .../chat_models/chrome_ai.d.cts               |  1 -
 .../chat_models/chrome_ai.d.ts                |  1 -
 .../chat_models/chrome_ai.js                  |  1 -
 5 files changed, 15 insertions(+), 25 deletions(-)
 delete mode 100644 libs/langchain-community/chat_models/chrome_ai.cjs
 delete mode 100644 libs/langchain-community/chat_models/chrome_ai.d.cts
 delete mode 100644 libs/langchain-community/chat_models/chrome_ai.d.ts
 delete mode 100644 libs/langchain-community/chat_models/chrome_ai.js

diff --git a/langchain/src/experimental/chrome_ai/chat_models.ts b/langchain/src/experimental/chrome_ai/chat_models.ts
index 0b83a5c11548..50a53f5400b3 100644
--- a/langchain/src/experimental/chrome_ai/chat_models.ts
+++ b/langchain/src/experimental/chrome_ai/chat_models.ts
@@ -136,28 +136,22 @@ export class ChatChromeAI extends SimpleChatModel<ChromeAICallOptions> {
       throw new Error("Session not found. Please call `.initialize()` first.");
     }
     const textPrompt = formatPrompt(messages);
-
+  
     const stream = this.session.promptStreaming(textPrompt);
-    const reader = stream.getReader();
-
-    try {
-      let previousLength = 0;
-      while (true) {
-        const { done, value } = await reader.read();
-        if (done) break;
-        const newContent = value.slice(previousLength);
-        previousLength = value.length;
-        yield new ChatGenerationChunk({
-          text: newContent,
-          message: new AIMessageChunk({
-            content: newContent,
-            additional_kwargs: {},
-          }),
-        });
-        await runManager?.handleLLMNewToken(newContent);
-      }
-    } finally {
-      reader.releaseLock();
+    const iterableStream = stream.pipeThrough(new TextDecoderStream()).getIterator();
+  
+    let previousContent = "";
+    for await (const chunk of iterableStream) {
+      const newContent = chunk.slice(previousContent.length);
+      previousContent += newContent;
+      yield new ChatGenerationChunk({
+        text: newContent,
+        message: new AIMessageChunk({
+          content: newContent,
+          additional_kwargs: {},
+        }),
+      });
+      await runManager?.handleLLMNewToken(newContent);
     }
   }
 
diff --git a/libs/langchain-community/chat_models/chrome_ai.cjs b/libs/langchain-community/chat_models/chrome_ai.cjs
deleted file mode 100644
index 2a0c111f92e4..000000000000
--- a/libs/langchain-community/chat_models/chrome_ai.cjs
+++ /dev/null
@@ -1 +0,0 @@
-module.exports = require('../dist/chat_models/chrome_ai.cjs');
\ No newline at end of file
diff --git a/libs/langchain-community/chat_models/chrome_ai.d.cts b/libs/langchain-community/chat_models/chrome_ai.d.cts
deleted file mode 100644
index 40caf3c9f60f..000000000000
--- a/libs/langchain-community/chat_models/chrome_ai.d.cts
+++ /dev/null
@@ -1 +0,0 @@
-export * from '../dist/chat_models/chrome_ai.js'
\ No newline at end of file
diff --git a/libs/langchain-community/chat_models/chrome_ai.d.ts b/libs/langchain-community/chat_models/chrome_ai.d.ts
deleted file mode 100644
index 40caf3c9f60f..000000000000
--- a/libs/langchain-community/chat_models/chrome_ai.d.ts
+++ /dev/null
@@ -1 +0,0 @@
-export * from '../dist/chat_models/chrome_ai.js'
\ No newline at end of file
diff --git a/libs/langchain-community/chat_models/chrome_ai.js b/libs/langchain-community/chat_models/chrome_ai.js
deleted file mode 100644
index 40caf3c9f60f..000000000000
--- a/libs/langchain-community/chat_models/chrome_ai.js
+++ /dev/null
@@ -1 +0,0 @@
-export * from '../dist/chat_models/chrome_ai.js'
\ No newline at end of file

From ddcc08b340e3fdd3c5c36bb88ba12a8b8a7b7f80 Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Wed, 26 Jun 2024 10:58:11 -0700
Subject: [PATCH 09/15] chore: lint files

---
 langchain/src/experimental/chrome_ai/chat_models.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/langchain/src/experimental/chrome_ai/chat_models.ts b/langchain/src/experimental/chrome_ai/chat_models.ts
index 50a53f5400b3..e61a3420d791 100644
--- a/langchain/src/experimental/chrome_ai/chat_models.ts
+++ b/langchain/src/experimental/chrome_ai/chat_models.ts
@@ -6,6 +6,7 @@ import type { BaseLanguageModelCallOptions } from "@langchain/core/language_mode
 import { CallbackManagerForLLMRun } from "@langchain/core/callbacks/manager";
 import { BaseMessage, AIMessageChunk } from "@langchain/core/messages";
 import { ChatGenerationChunk } from "@langchain/core/outputs";
+import { IterableReadableStream } from "@langchain/core/utils/stream";
 
 export interface AI {
   canCreateTextSession(): Promise<AIModelAvailability>;
@@ -138,7 +139,7 @@ export class ChatChromeAI extends SimpleChatModel<ChromeAICallOptions> {
     const textPrompt = formatPrompt(messages);
   
     const stream = this.session.promptStreaming(textPrompt);
-    const iterableStream = stream.pipeThrough(new TextDecoderStream()).getIterator();
+    const iterableStream = IterableReadableStream.fromReadableStream(stream);
   
     let previousContent = "";
     for await (const chunk of iterableStream) {

From 80b3ffe49e70e013de637e0fd823dd056d57e36d Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Wed, 26 Jun 2024 11:02:08 -0700
Subject: [PATCH 10/15] chore: lint files

---
 langchain/src/experimental/chrome_ai/chat_models.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/langchain/src/experimental/chrome_ai/chat_models.ts b/langchain/src/experimental/chrome_ai/chat_models.ts
index e61a3420d791..14b27200226c 100644
--- a/langchain/src/experimental/chrome_ai/chat_models.ts
+++ b/langchain/src/experimental/chrome_ai/chat_models.ts
@@ -100,7 +100,7 @@ export class ChatChromeAI extends SimpleChatModel<ChromeAICallOptions> {
       throw new Error("ChatChromeAI can only be used in the browser.");
     }
 
-    const {ai} = window as any;
+    const { ai } = window as any;
     const canCreateTextSession = await ai.canCreateTextSession();
     if (canCreateTextSession === AIModelAvailability.No) {
       throw new Error("The AI model is not available.");
@@ -137,10 +137,10 @@ export class ChatChromeAI extends SimpleChatModel<ChromeAICallOptions> {
       throw new Error("Session not found. Please call `.initialize()` first.");
     }
     const textPrompt = formatPrompt(messages);
-  
+
     const stream = this.session.promptStreaming(textPrompt);
     const iterableStream = IterableReadableStream.fromReadableStream(stream);
-  
+
     let previousContent = "";
     for await (const chunk of iterableStream) {
       const newContent = chunk.slice(previousContent.length);

From f86e10b8b98a4d235079a6248d60a956639b176f Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Wed, 26 Jun 2024 11:22:35 -0700
Subject: [PATCH 11/15] docs

---
 .../docs/integrations/chat/chrome_ai.mdx      | 58 +++++++++++++++++++
 .../experimental/chrome_ai/app/src/index.js   |  2 +-
 .../src/experimental/chrome_ai/app/yarn.lock  |  8 +--
 .../src/experimental/chrome_ai/chat_models.ts | 16 +++--
 4 files changed, 74 insertions(+), 10 deletions(-)
 create mode 100644 docs/core_docs/docs/integrations/chat/chrome_ai.mdx

diff --git a/docs/core_docs/docs/integrations/chat/chrome_ai.mdx b/docs/core_docs/docs/integrations/chat/chrome_ai.mdx
new file mode 100644
index 000000000000..74e5f5362e64
--- /dev/null
+++ b/docs/core_docs/docs/integrations/chat/chrome_ai.mdx
@@ -0,0 +1,58 @@
+---
+sidebar_label: ChromeAI
+---
+
+import CodeBlock from "@theme/CodeBlock";
+
+# ChatChromeAI
+
+:::info
+This feature is **experimental** and is subject to change.
+:::
+:::note
+The `Built-in AI Early Preview Program` by Google is currently in beta. To apply for access or find more information, please visit [this link](https://developer.chrome.com/docs/ai/built-in).
+:::
+
+ChatChromeAI leverages the webGPU and Gemini Nano to run LLMs directly in the browser, without the need for an internet connection.
+This allows for running faster and private models without ever having data leave the consumers device.
+
+## Getting started
+
+Once you've been granted access to the program, follow all steps to download the model.
+
+Once downloaded, you can start using `ChatChromeAI` in the browser as follows:
+
+```typescript
+import { ChatChromeAI } from "langchain/experimental/chat_models/chrome_ai";
+import { HumanMessage } from "@langchain/core/messages";
+
+const model = new ChatChromeAI({
+  temperature: 0.5, // Optional, defaults to 0.5
+  topK: 40, // Optional, defaults to 40
+});
+
+const message = new HumanMessage("Write me a short poem please");
+
+const response = await model.invoke([message]);
+```
+
+### Streaming
+
+`ChatChromeAI` also supports streaming chunks:
+
+```typescript
+import { AIMessageChunk } from "@langchain/core/messages";
+
+let fullMessage: AIMessageChunk | undefined = undefined;
+for await (const chunk of await model.stream([message])) {
+  if (!fullMessage) {
+    fullMessage = chunk;
+  } else {
+    fullMessage = fullMessage.concat(chunk);
+  }
+  console.log(fullMessage.content);
+}
+```
+
+We also have a simple demo application which you can copy to instantly start running `ChatChromeAI` in your browser.
+Navigate to the [README.md](../../../../../langchain/src/experimental/chrome_ai/app/README.md) in the `./app` directory of the integration for more instructions.
diff --git a/langchain/src/experimental/chrome_ai/app/src/index.js b/langchain/src/experimental/chrome_ai/app/src/index.js
index 9c1197736f47..5cebb03bce15 100644
--- a/langchain/src/experimental/chrome_ai/app/src/index.js
+++ b/langchain/src/experimental/chrome_ai/app/src/index.js
@@ -1,7 +1,7 @@
 import { ChatChromeAI } from "langchain/experimental/chat_models/chrome_ai";
 import { encodingForModel } from "@langchain/core/utils/tiktoken";
 
-const model = new ChatChromeAI({ callbacks: {} });
+const model = new ChatChromeAI();
 const destroyButton = document.getElementById("destroyButton");
 const inputForm = document.getElementById("inputForm");
 const submitButton = inputForm.querySelector("button[type='submit']");
diff --git a/langchain/src/experimental/chrome_ai/app/yarn.lock b/langchain/src/experimental/chrome_ai/app/yarn.lock
index 9e4d598304f4..9cf9aa6fca5e 100644
--- a/langchain/src/experimental/chrome_ai/app/yarn.lock
+++ b/langchain/src/experimental/chrome_ai/app/yarn.lock
@@ -86,14 +86,14 @@ __metadata:
 
 "@langchain/openai@file:../../../../../libs/langchain-openai::locator=chrome_ai%40workspace%3A.":
   version: 0.2.0
-  resolution: "@langchain/openai@file:../../../../../libs/langchain-openai#../../../../../libs/langchain-openai::hash=0e7c98&locator=chrome_ai%40workspace%3A."
+  resolution: "@langchain/openai@file:../../../../../libs/langchain-openai#../../../../../libs/langchain-openai::hash=1fbca0&locator=chrome_ai%40workspace%3A."
   dependencies:
     "@langchain/core": ">=0.2.8 <0.3.0"
     js-tiktoken: ^1.0.12
     openai: ^4.49.1
     zod: ^3.22.4
     zod-to-json-schema: ^3.22.3
-  checksum: 2b070c3c7195597d4bb85ef8265721ca4eb981a14ead9b65145a9d241402348b6e6950ef8edd0667ee77f574282aff84fa04ceb4d35fa9edfaf666fdc06567d1
+  checksum: bee5a6cebd31e036d531fe00f3fa477bf41f18778931753cf9ed1b3acab35fd2fc2baf0192b5a05e709736ec0a117e73440ce01975a5bde7b902ca58cf708344
   languageName: node
   linkType: hard
 
@@ -1165,7 +1165,7 @@ __metadata:
 
 "langchain@file:../../../../::locator=chrome_ai%40workspace%3A.":
   version: 0.2.7
-  resolution: "langchain@file:../../../../#../../../../::hash=8f772d&locator=chrome_ai%40workspace%3A."
+  resolution: "langchain@file:../../../../#../../../../::hash=4f9e2d&locator=chrome_ai%40workspace%3A."
   dependencies:
     "@langchain/core": ~0.2.0
     "@langchain/openai": ">=0.1.0 <0.3.0"
@@ -1334,7 +1334,7 @@ __metadata:
       optional: true
     youtubei.js:
       optional: true
-  checksum: 81cf69fc35fb79ac4df6a1a4510cd28bad10c4a5e9b7a59c53caff1c75673e375ae80b187a84c5ef1e75814dab140fc928f47cc1985f481b93660b4acb9ef7ce
+  checksum: b5094561ed6a8826c8c8240f492372ba7dd3afdeecce3ec1fdd9c7e85d99428e0e70849d3dc1681e834d378f62f1e7f9f5e407ff3dcbc87287c26191657f9c31
   languageName: node
   linkType: hard
 
diff --git a/langchain/src/experimental/chrome_ai/chat_models.ts b/langchain/src/experimental/chrome_ai/chat_models.ts
index 14b27200226c..79fe73493ef0 100644
--- a/langchain/src/experimental/chrome_ai/chat_models.ts
+++ b/langchain/src/experimental/chrome_ai/chat_models.ts
@@ -3,7 +3,10 @@ import {
   type BaseChatModelParams,
 } from "@langchain/core/language_models/chat_models";
 import type { BaseLanguageModelCallOptions } from "@langchain/core/language_models/base";
-import { CallbackManagerForLLMRun } from "@langchain/core/callbacks/manager";
+import {
+  CallbackManagerForLLMRun,
+  Callbacks,
+} from "@langchain/core/callbacks/manager";
 import { BaseMessage, AIMessageChunk } from "@langchain/core/messages";
 import { ChatGenerationChunk } from "@langchain/core/outputs";
 import { IterableReadableStream } from "@langchain/core/utils/stream";
@@ -82,10 +85,13 @@ export class ChatChromeAI extends SimpleChatModel<ChromeAICallOptions> {
     return "ChatChromeAI";
   }
 
-  constructor(inputs: ChromeAIInputs) {
-    super(inputs);
-    this.temperature = inputs.temperature ?? this.temperature;
-    this.topK = inputs.topK ?? this.topK;
+  constructor(inputs?: ChromeAIInputs) {
+    super({
+      callbacks: {} as Callbacks,
+      ...inputs,
+    });
+    this.temperature = inputs?.temperature ?? this.temperature;
+    this.topK = inputs?.topK ?? this.topK;
   }
 
   _llmType() {

From 1f2e0e132976788dafe37ae34e9d00b17b82fcb3 Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Wed, 26 Jun 2024 11:53:05 -0700
Subject: [PATCH 12/15] fix docs link

---
 docs/core_docs/docs/integrations/chat/chrome_ai.mdx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/core_docs/docs/integrations/chat/chrome_ai.mdx b/docs/core_docs/docs/integrations/chat/chrome_ai.mdx
index 74e5f5362e64..b60dcc0da88d 100644
--- a/docs/core_docs/docs/integrations/chat/chrome_ai.mdx
+++ b/docs/core_docs/docs/integrations/chat/chrome_ai.mdx
@@ -55,4 +55,4 @@ for await (const chunk of await model.stream([message])) {
 ```
 
 We also have a simple demo application which you can copy to instantly start running `ChatChromeAI` in your browser.
-Navigate to the [README.md](../../../../../langchain/src/experimental/chrome_ai/app/README.md) in the `./app` directory of the integration for more instructions.
+Navigate to the [README.md](https://github.com/langchain-ai/langchainjs/tree/main/langchain/src/experimental/chrome_ai/app/README.md) in the `./app` directory of the integration for more instructions.

From 8e259b6db3935168ba52f22610b483a04fedc85d Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Thu, 27 Jun 2024 16:53:40 -0700
Subject: [PATCH 13/15] moved to community

---
 .../docs/integrations/chat/chrome_ai.mdx      |   5 +-
 .../test-exports-bun/src/entrypoints.js       |   1 -
 .../test-exports-cf/src/entrypoints.js        |   1 -
 .../test-exports-cjs/src/entrypoints.js       |   1 -
 .../test-exports-esbuild/src/entrypoints.js   |   1 -
 .../test-exports-esm/src/entrypoints.js       |   1 -
 .../test-exports-vercel/src/entrypoints.js    |   1 -
 .../test-exports-vite/src/entrypoints.js      |   1 -
 langchain/.gitignore                          |   4 -
 langchain/langchain.config.js                 |   1 -
 langchain/package.json                        |  13 -
 langchain/src/load/import_map.ts              |   1 -
 libs/langchain-community/.gitignore           |   4 +
 libs/langchain-community/langchain.config.js  |   1 +
 libs/langchain-community/package.json         |  13 +
 .../chat_models}/chrome_ai/app/README.md      |   0
 .../chat_models}/chrome_ai/app/package.json   |   4 +-
 .../chrome_ai/app/src/chrome_ai.html          |   0
 .../chat_models}/chrome_ai/app/src/index.js   |   2 +-
 .../chrome_ai/app/webpack.config.js           |   0
 .../chat_models}/chrome_ai/app/yarn.lock      | 447 +++++++++++++++++-
 .../chat_models}/chrome_ai/chat_models.ts     |   0
 .../src/load/import_map.ts                    |   1 +
 23 files changed, 449 insertions(+), 54 deletions(-)
 rename {langchain/src/experimental => libs/langchain-community/src/experimental/chat_models}/chrome_ai/app/README.md (100%)
 rename {langchain/src/experimental => libs/langchain-community/src/experimental/chat_models}/chrome_ai/app/package.json (71%)
 rename {langchain/src/experimental => libs/langchain-community/src/experimental/chat_models}/chrome_ai/app/src/chrome_ai.html (100%)
 rename {langchain/src/experimental => libs/langchain-community/src/experimental/chat_models}/chrome_ai/app/src/index.js (96%)
 rename {langchain/src/experimental => libs/langchain-community/src/experimental/chat_models}/chrome_ai/app/webpack.config.js (100%)
 rename {langchain/src/experimental => libs/langchain-community/src/experimental/chat_models}/chrome_ai/app/yarn.lock (86%)
 rename {langchain/src/experimental => libs/langchain-community/src/experimental/chat_models}/chrome_ai/chat_models.ts (100%)

diff --git a/docs/core_docs/docs/integrations/chat/chrome_ai.mdx b/docs/core_docs/docs/integrations/chat/chrome_ai.mdx
index b60dcc0da88d..c13ba779e34a 100644
--- a/docs/core_docs/docs/integrations/chat/chrome_ai.mdx
+++ b/docs/core_docs/docs/integrations/chat/chrome_ai.mdx
@@ -9,6 +9,7 @@ import CodeBlock from "@theme/CodeBlock";
 :::info
 This feature is **experimental** and is subject to change.
 :::
+
 :::note
 The `Built-in AI Early Preview Program` by Google is currently in beta. To apply for access or find more information, please visit [this link](https://developer.chrome.com/docs/ai/built-in).
 :::
@@ -23,7 +24,7 @@ Once you've been granted access to the program, follow all steps to download the
 Once downloaded, you can start using `ChatChromeAI` in the browser as follows:
 
 ```typescript
-import { ChatChromeAI } from "langchain/experimental/chat_models/chrome_ai";
+import { ChatChromeAI } from "@langchain/community/experimental/chat_models/chrome_ai";
 import { HumanMessage } from "@langchain/core/messages";
 
 const model = new ChatChromeAI({
@@ -55,4 +56,4 @@ for await (const chunk of await model.stream([message])) {
 ```
 
 We also have a simple demo application which you can copy to instantly start running `ChatChromeAI` in your browser.
-Navigate to the [README.md](https://github.com/langchain-ai/langchainjs/tree/main/langchain/src/experimental/chrome_ai/app/README.md) in the `./app` directory of the integration for more instructions.
+Navigate to the [README.md](https://github.com/langchain-ai/langchainjs/tree/main/libs/langchain-community/src/experimental/chrome_ai/app/README.md) in the `./app` directory of the integration for more instructions.
diff --git a/environment_tests/test-exports-bun/src/entrypoints.js b/environment_tests/test-exports-bun/src/entrypoints.js
index bef03d471759..0127a63d1c08 100644
--- a/environment_tests/test-exports-bun/src/entrypoints.js
+++ b/environment_tests/test-exports-bun/src/entrypoints.js
@@ -68,7 +68,6 @@ export * from "langchain/experimental/babyagi";
 export * from "langchain/experimental/generative_agents";
 export * from "langchain/experimental/plan_and_execute";
 export * from "langchain/experimental/chains/violation_of_expectations";
-export * from "langchain/experimental/chat_models/chrome_ai";
 export * from "langchain/experimental/masking";
 export * from "langchain/experimental/prompts/custom_format";
 export * from "langchain/evaluation";
diff --git a/environment_tests/test-exports-cf/src/entrypoints.js b/environment_tests/test-exports-cf/src/entrypoints.js
index bef03d471759..0127a63d1c08 100644
--- a/environment_tests/test-exports-cf/src/entrypoints.js
+++ b/environment_tests/test-exports-cf/src/entrypoints.js
@@ -68,7 +68,6 @@ export * from "langchain/experimental/babyagi";
 export * from "langchain/experimental/generative_agents";
 export * from "langchain/experimental/plan_and_execute";
 export * from "langchain/experimental/chains/violation_of_expectations";
-export * from "langchain/experimental/chat_models/chrome_ai";
 export * from "langchain/experimental/masking";
 export * from "langchain/experimental/prompts/custom_format";
 export * from "langchain/evaluation";
diff --git a/environment_tests/test-exports-cjs/src/entrypoints.js b/environment_tests/test-exports-cjs/src/entrypoints.js
index 7c30db491b23..5f9a19db39f2 100644
--- a/environment_tests/test-exports-cjs/src/entrypoints.js
+++ b/environment_tests/test-exports-cjs/src/entrypoints.js
@@ -68,7 +68,6 @@ const experimental_babyagi = require("langchain/experimental/babyagi");
 const experimental_generative_agents = require("langchain/experimental/generative_agents");
 const experimental_plan_and_execute = require("langchain/experimental/plan_and_execute");
 const experimental_chains_violation_of_expectations = require("langchain/experimental/chains/violation_of_expectations");
-const experimental_chat_models_chrome_ai = require("langchain/experimental/chat_models/chrome_ai");
 const experimental_masking = require("langchain/experimental/masking");
 const experimental_prompts_custom_format = require("langchain/experimental/prompts/custom_format");
 const evaluation = require("langchain/evaluation");
diff --git a/environment_tests/test-exports-esbuild/src/entrypoints.js b/environment_tests/test-exports-esbuild/src/entrypoints.js
index 693bc1eab6b7..d3b76a743d8a 100644
--- a/environment_tests/test-exports-esbuild/src/entrypoints.js
+++ b/environment_tests/test-exports-esbuild/src/entrypoints.js
@@ -68,7 +68,6 @@ import * as experimental_babyagi from "langchain/experimental/babyagi";
 import * as experimental_generative_agents from "langchain/experimental/generative_agents";
 import * as experimental_plan_and_execute from "langchain/experimental/plan_and_execute";
 import * as experimental_chains_violation_of_expectations from "langchain/experimental/chains/violation_of_expectations";
-import * as experimental_chat_models_chrome_ai from "langchain/experimental/chat_models/chrome_ai";
 import * as experimental_masking from "langchain/experimental/masking";
 import * as experimental_prompts_custom_format from "langchain/experimental/prompts/custom_format";
 import * as evaluation from "langchain/evaluation";
diff --git a/environment_tests/test-exports-esm/src/entrypoints.js b/environment_tests/test-exports-esm/src/entrypoints.js
index 693bc1eab6b7..d3b76a743d8a 100644
--- a/environment_tests/test-exports-esm/src/entrypoints.js
+++ b/environment_tests/test-exports-esm/src/entrypoints.js
@@ -68,7 +68,6 @@ import * as experimental_babyagi from "langchain/experimental/babyagi";
 import * as experimental_generative_agents from "langchain/experimental/generative_agents";
 import * as experimental_plan_and_execute from "langchain/experimental/plan_and_execute";
 import * as experimental_chains_violation_of_expectations from "langchain/experimental/chains/violation_of_expectations";
-import * as experimental_chat_models_chrome_ai from "langchain/experimental/chat_models/chrome_ai";
 import * as experimental_masking from "langchain/experimental/masking";
 import * as experimental_prompts_custom_format from "langchain/experimental/prompts/custom_format";
 import * as evaluation from "langchain/evaluation";
diff --git a/environment_tests/test-exports-vercel/src/entrypoints.js b/environment_tests/test-exports-vercel/src/entrypoints.js
index bef03d471759..0127a63d1c08 100644
--- a/environment_tests/test-exports-vercel/src/entrypoints.js
+++ b/environment_tests/test-exports-vercel/src/entrypoints.js
@@ -68,7 +68,6 @@ export * from "langchain/experimental/babyagi";
 export * from "langchain/experimental/generative_agents";
 export * from "langchain/experimental/plan_and_execute";
 export * from "langchain/experimental/chains/violation_of_expectations";
-export * from "langchain/experimental/chat_models/chrome_ai";
 export * from "langchain/experimental/masking";
 export * from "langchain/experimental/prompts/custom_format";
 export * from "langchain/evaluation";
diff --git a/environment_tests/test-exports-vite/src/entrypoints.js b/environment_tests/test-exports-vite/src/entrypoints.js
index bef03d471759..0127a63d1c08 100644
--- a/environment_tests/test-exports-vite/src/entrypoints.js
+++ b/environment_tests/test-exports-vite/src/entrypoints.js
@@ -68,7 +68,6 @@ export * from "langchain/experimental/babyagi";
 export * from "langchain/experimental/generative_agents";
 export * from "langchain/experimental/plan_and_execute";
 export * from "langchain/experimental/chains/violation_of_expectations";
-export * from "langchain/experimental/chat_models/chrome_ai";
 export * from "langchain/experimental/masking";
 export * from "langchain/experimental/prompts/custom_format";
 export * from "langchain/evaluation";
diff --git a/langchain/.gitignore b/langchain/.gitignore
index d24052476339..0047dee6bc98 100644
--- a/langchain/.gitignore
+++ b/langchain/.gitignore
@@ -510,10 +510,6 @@ experimental/chains/violation_of_expectations.cjs
 experimental/chains/violation_of_expectations.js
 experimental/chains/violation_of_expectations.d.ts
 experimental/chains/violation_of_expectations.d.cts
-experimental/chat_models/chrome_ai.cjs
-experimental/chat_models/chrome_ai.js
-experimental/chat_models/chrome_ai.d.ts
-experimental/chat_models/chrome_ai.d.cts
 experimental/masking.cjs
 experimental/masking.js
 experimental/masking.d.ts
diff --git a/langchain/langchain.config.js b/langchain/langchain.config.js
index 7d7e227eece9..d086a9e2cdb8 100644
--- a/langchain/langchain.config.js
+++ b/langchain/langchain.config.js
@@ -190,7 +190,6 @@ export const config = {
     "experimental/plan_and_execute": "experimental/plan_and_execute/index",
     "experimental/chains/violation_of_expectations":
       "experimental/chains/violation_of_expectations/index",
-    "experimental/chat_models/chrome_ai": "experimental/chrome_ai/chat_models",
     "experimental/masking": "experimental/masking/index",
     "experimental/prompts/custom_format": "experimental/prompts/custom_format",
     "experimental/prompts/handlebars": "experimental/prompts/handlebars",
diff --git a/langchain/package.json b/langchain/package.json
index 5c632daf14d5..9bd804d77d0c 100644
--- a/langchain/package.json
+++ b/langchain/package.json
@@ -522,10 +522,6 @@
     "experimental/chains/violation_of_expectations.js",
     "experimental/chains/violation_of_expectations.d.ts",
     "experimental/chains/violation_of_expectations.d.cts",
-    "experimental/chat_models/chrome_ai.cjs",
-    "experimental/chat_models/chrome_ai.js",
-    "experimental/chat_models/chrome_ai.d.ts",
-    "experimental/chat_models/chrome_ai.d.cts",
     "experimental/masking.cjs",
     "experimental/masking.js",
     "experimental/masking.d.ts",
@@ -2079,15 +2075,6 @@
       "import": "./experimental/chains/violation_of_expectations.js",
       "require": "./experimental/chains/violation_of_expectations.cjs"
     },
-    "./experimental/chat_models/chrome_ai": {
-      "types": {
-        "import": "./experimental/chat_models/chrome_ai.d.ts",
-        "require": "./experimental/chat_models/chrome_ai.d.cts",
-        "default": "./experimental/chat_models/chrome_ai.d.ts"
-      },
-      "import": "./experimental/chat_models/chrome_ai.js",
-      "require": "./experimental/chat_models/chrome_ai.cjs"
-    },
     "./experimental/masking": {
       "types": {
         "import": "./experimental/masking.d.ts",
diff --git a/langchain/src/load/import_map.ts b/langchain/src/load/import_map.ts
index 69f3fe8fac5c..115793fcac92 100644
--- a/langchain/src/load/import_map.ts
+++ b/langchain/src/load/import_map.ts
@@ -59,7 +59,6 @@ export * as experimental__babyagi from "../experimental/babyagi/index.js";
 export * as experimental__generative_agents from "../experimental/generative_agents/index.js";
 export * as experimental__plan_and_execute from "../experimental/plan_and_execute/index.js";
 export * as experimental__chains__violation_of_expectations from "../experimental/chains/violation_of_expectations/index.js";
-export * as experimental__chat_models__chrome_ai from "../experimental/chrome_ai/chat_models.js";
 export * as experimental__masking from "../experimental/masking/index.js";
 export * as experimental__prompts__custom_format from "../experimental/prompts/custom_format.js";
 export * as evaluation from "../evaluation/index.js";
diff --git a/libs/langchain-community/.gitignore b/libs/langchain-community/.gitignore
index 4246a650f6df..1e47ea0ab61e 100644
--- a/libs/langchain-community/.gitignore
+++ b/libs/langchain-community/.gitignore
@@ -1030,6 +1030,10 @@ experimental/chat_models/ollama_functions.cjs
 experimental/chat_models/ollama_functions.js
 experimental/chat_models/ollama_functions.d.ts
 experimental/chat_models/ollama_functions.d.cts
+experimental/chat_models/chrome_ai.cjs
+experimental/chat_models/chrome_ai.js
+experimental/chat_models/chrome_ai.d.ts
+experimental/chat_models/chrome_ai.d.cts
 chains/graph_qa/cypher.cjs
 chains/graph_qa/cypher.js
 chains/graph_qa/cypher.d.ts
diff --git a/libs/langchain-community/langchain.config.js b/libs/langchain-community/langchain.config.js
index 7012d8e06c5a..e73c23b4938c 100644
--- a/libs/langchain-community/langchain.config.js
+++ b/libs/langchain-community/langchain.config.js
@@ -316,6 +316,7 @@ export const config = {
     "experimental/hubs/makersuite/googlemakersuitehub":
       "experimental/hubs/makersuite/googlemakersuitehub",
     "experimental/chat_models/ollama_functions": "experimental/chat_models/ollama_functions",
+    "experimental/chat_models/chrome_ai": "experimental/chat_models/chrome_ai/chat_models",
     // chains
     "chains/graph_qa/cypher": "chains/graph_qa/cypher"
   },
diff --git a/libs/langchain-community/package.json b/libs/langchain-community/package.json
index 3ef6acbe7890..b7feada5ff7d 100644
--- a/libs/langchain-community/package.json
+++ b/libs/langchain-community/package.json
@@ -3022,6 +3022,15 @@
       "import": "./experimental/chat_models/ollama_functions.js",
       "require": "./experimental/chat_models/ollama_functions.cjs"
     },
+    "./experimental/chat_models/chrome_ai": {
+      "types": {
+        "import": "./experimental/chat_models/chrome_ai.d.ts",
+        "require": "./experimental/chat_models/chrome_ai.d.cts",
+        "default": "./experimental/chat_models/chrome_ai.d.ts"
+      },
+      "import": "./experimental/chat_models/chrome_ai.js",
+      "require": "./experimental/chat_models/chrome_ai.cjs"
+    },
     "./chains/graph_qa/cypher": {
       "types": {
         "import": "./chains/graph_qa/cypher.d.ts",
@@ -4067,6 +4076,10 @@
     "experimental/chat_models/ollama_functions.js",
     "experimental/chat_models/ollama_functions.d.ts",
     "experimental/chat_models/ollama_functions.d.cts",
+    "experimental/chat_models/chrome_ai.cjs",
+    "experimental/chat_models/chrome_ai.js",
+    "experimental/chat_models/chrome_ai.d.ts",
+    "experimental/chat_models/chrome_ai.d.cts",
     "chains/graph_qa/cypher.cjs",
     "chains/graph_qa/cypher.js",
     "chains/graph_qa/cypher.d.ts",
diff --git a/langchain/src/experimental/chrome_ai/app/README.md b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/README.md
similarity index 100%
rename from langchain/src/experimental/chrome_ai/app/README.md
rename to libs/langchain-community/src/experimental/chat_models/chrome_ai/app/README.md
diff --git a/langchain/src/experimental/chrome_ai/app/package.json b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/package.json
similarity index 71%
rename from langchain/src/experimental/chrome_ai/app/package.json
rename to libs/langchain-community/src/experimental/chat_models/chrome_ai/app/package.json
index 00549bbcbf7a..461f8683a307 100644
--- a/langchain/src/experimental/chrome_ai/app/package.json
+++ b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/package.json
@@ -10,7 +10,7 @@
     "webpack-cli": "^5.1.4"
   },
   "dependencies": {
-    "@langchain/openai": "file:../../../../../libs/langchain-openai",
-    "langchain": "file:../../../../"
+    "@langchain/community": "file:../../../../../",
+    "@langchain/openai": "file:../../../../../../langchain-openai"
   }
 }
diff --git a/langchain/src/experimental/chrome_ai/app/src/chrome_ai.html b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/src/chrome_ai.html
similarity index 100%
rename from langchain/src/experimental/chrome_ai/app/src/chrome_ai.html
rename to libs/langchain-community/src/experimental/chat_models/chrome_ai/app/src/chrome_ai.html
diff --git a/langchain/src/experimental/chrome_ai/app/src/index.js b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/src/index.js
similarity index 96%
rename from langchain/src/experimental/chrome_ai/app/src/index.js
rename to libs/langchain-community/src/experimental/chat_models/chrome_ai/app/src/index.js
index 5cebb03bce15..1edd95feeec2 100644
--- a/langchain/src/experimental/chrome_ai/app/src/index.js
+++ b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/src/index.js
@@ -1,4 +1,4 @@
-import { ChatChromeAI } from "langchain/experimental/chat_models/chrome_ai";
+import { ChatChromeAI } from "@langchain/community/experimental/chat_models/chrome_ai";
 import { encodingForModel } from "@langchain/core/utils/tiktoken";
 
 const model = new ChatChromeAI();
diff --git a/langchain/src/experimental/chrome_ai/app/webpack.config.js b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/webpack.config.js
similarity index 100%
rename from langchain/src/experimental/chrome_ai/app/webpack.config.js
rename to libs/langchain-community/src/experimental/chat_models/chrome_ai/app/webpack.config.js
diff --git a/langchain/src/experimental/chrome_ai/app/yarn.lock b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/yarn.lock
similarity index 86%
rename from langchain/src/experimental/chrome_ai/app/yarn.lock
rename to libs/langchain-community/src/experimental/chat_models/chrome_ai/app/yarn.lock
index 9cf9aa6fca5e..86d7f91a365a 100644
--- a/langchain/src/experimental/chrome_ai/app/yarn.lock
+++ b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/yarn.lock
@@ -64,7 +64,388 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@langchain/core@npm:>0.2.0 <0.3.0, @langchain/core@npm:>=0.2.8 <0.3.0, @langchain/core@npm:~0.2.0":
+"@langchain/community@file:../../../../../::locator=chrome_ai%40workspace%3A.":
+  version: 0.2.14
+  resolution: "@langchain/community@file:../../../../../#../../../../../::hash=6c19e0&locator=chrome_ai%40workspace%3A."
+  dependencies:
+    "@langchain/core": ~0.2.9
+    "@langchain/openai": ~0.1.0
+    binary-extensions: ^2.2.0
+    expr-eval: ^2.0.2
+    flat: ^5.0.2
+    js-yaml: ^4.1.0
+    langchain: 0.2.3
+    langsmith: ~0.1.30
+    uuid: ^9.0.0
+    zod: ^3.22.3
+    zod-to-json-schema: ^3.22.5
+  peerDependencies:
+    "@aws-crypto/sha256-js": ^5.0.0
+    "@aws-sdk/client-bedrock-agent-runtime": ^3.583.0
+    "@aws-sdk/client-bedrock-runtime": ^3.422.0
+    "@aws-sdk/client-dynamodb": ^3.310.0
+    "@aws-sdk/client-kendra": ^3.352.0
+    "@aws-sdk/client-lambda": ^3.310.0
+    "@aws-sdk/client-s3": ^3.310.0
+    "@aws-sdk/client-sagemaker-runtime": ^3.310.0
+    "@aws-sdk/client-sfn": ^3.310.0
+    "@aws-sdk/credential-provider-node": ^3.388.0
+    "@azure/search-documents": ^12.0.0
+    "@azure/storage-blob": ^12.15.0
+    "@browserbasehq/sdk": "*"
+    "@clickhouse/client": ^0.2.5
+    "@cloudflare/ai": "*"
+    "@datastax/astra-db-ts": ^1.0.0
+    "@elastic/elasticsearch": ^8.4.0
+    "@getmetal/metal-sdk": "*"
+    "@getzep/zep-cloud": ^1.0.6
+    "@getzep/zep-js": ^0.9.0
+    "@gomomento/sdk": ^1.51.1
+    "@gomomento/sdk-core": ^1.51.1
+    "@google-ai/generativelanguage": "*"
+    "@google-cloud/storage": ^6.10.1 || ^7.7.0
+    "@gradientai/nodejs-sdk": ^1.2.0
+    "@huggingface/inference": ^2.6.4
+    "@layerup/layerup-security": ^1.5.12
+    "@mendable/firecrawl-js": ^0.0.13
+    "@mlc-ai/web-llm": 0.2.46
+    "@mozilla/readability": "*"
+    "@neondatabase/serverless": "*"
+    "@notionhq/client": ^2.2.10
+    "@opensearch-project/opensearch": "*"
+    "@pinecone-database/pinecone": "*"
+    "@planetscale/database": ^1.8.0
+    "@premai/prem-sdk": ^0.3.25
+    "@qdrant/js-client-rest": ^1.8.2
+    "@raycast/api": ^1.55.2
+    "@rockset/client": ^0.9.1
+    "@smithy/eventstream-codec": ^2.0.5
+    "@smithy/protocol-http": ^3.0.6
+    "@smithy/signature-v4": ^2.0.10
+    "@smithy/util-utf8": ^2.0.0
+    "@spider-cloud/spider-client": ^0.0.21
+    "@supabase/postgrest-js": ^1.1.1
+    "@supabase/supabase-js": ^2.10.0
+    "@tensorflow-models/universal-sentence-encoder": "*"
+    "@tensorflow/tfjs-converter": "*"
+    "@tensorflow/tfjs-core": "*"
+    "@upstash/ratelimit": ^1.1.3
+    "@upstash/redis": ^1.20.6
+    "@upstash/vector": ^1.1.1
+    "@vercel/kv": ^0.2.3
+    "@vercel/postgres": ^0.5.0
+    "@writerai/writer-sdk": ^0.40.2
+    "@xata.io/client": ^0.28.0
+    "@xenova/transformers": ^2.5.4
+    "@zilliz/milvus2-sdk-node": ">=2.3.5"
+    apify-client: ^2.7.1
+    assemblyai: ^4.0.0
+    better-sqlite3: ">=9.4.0 <12.0.0"
+    cassandra-driver: ^4.7.2
+    cborg: ^4.1.1
+    cheerio: ^1.0.0-rc.12
+    chromadb: "*"
+    closevector-common: 0.1.3
+    closevector-node: 0.1.6
+    closevector-web: 0.1.6
+    cohere-ai: "*"
+    convex: ^1.3.1
+    couchbase: ^4.3.0
+    crypto-js: ^4.2.0
+    d3-dsv: ^2.0.0
+    discord.js: ^14.14.1
+    dria: ^0.0.3
+    duck-duck-scrape: ^2.2.5
+    epub2: ^3.0.1
+    faiss-node: ^0.5.1
+    firebase-admin: ^11.9.0 || ^12.0.0
+    google-auth-library: "*"
+    googleapis: ^126.0.1
+    hnswlib-node: ^3.0.0
+    html-to-text: ^9.0.5
+    ignore: ^5.2.0
+    interface-datastore: ^8.2.11
+    ioredis: ^5.3.2
+    it-all: ^3.0.4
+    jsdom: "*"
+    jsonwebtoken: ^9.0.2
+    llmonitor: ^0.5.9
+    lodash: ^4.17.21
+    lunary: ^0.6.11
+    mammoth: ^1.6.0
+    mongodb: ">=5.2.0"
+    mysql2: ^3.3.3
+    neo4j-driver: "*"
+    node-llama-cpp: "*"
+    notion-to-md: ^3.1.0
+    officeparser: ^4.0.4
+    pdf-parse: 1.1.1
+    pg: ^8.11.0
+    pg-copy-streams: ^6.0.5
+    pickleparser: ^0.2.1
+    playwright: ^1.32.1
+    portkey-ai: ^0.1.11
+    puppeteer: ^19.7.2
+    redis: "*"
+    replicate: ^0.29.4
+    sonix-speech-recognition: ^2.1.1
+    srt-parser-2: ^1.2.3
+    typeorm: ^0.3.20
+    typesense: ^1.5.3
+    usearch: ^1.1.1
+    vectordb: ^0.1.4
+    voy-search: 0.6.2
+    weaviate-ts-client: "*"
+    web-auth-library: ^1.0.3
+    ws: ^8.14.2
+    youtube-transcript: ^1.0.6
+    youtubei.js: ^9.1.0
+  peerDependenciesMeta:
+    "@aws-crypto/sha256-js":
+      optional: true
+    "@aws-sdk/client-bedrock-agent-runtime":
+      optional: true
+    "@aws-sdk/client-bedrock-runtime":
+      optional: true
+    "@aws-sdk/client-dynamodb":
+      optional: true
+    "@aws-sdk/client-kendra":
+      optional: true
+    "@aws-sdk/client-lambda":
+      optional: true
+    "@aws-sdk/client-s3":
+      optional: true
+    "@aws-sdk/client-sagemaker-runtime":
+      optional: true
+    "@aws-sdk/client-sfn":
+      optional: true
+    "@aws-sdk/credential-provider-node":
+      optional: true
+    "@azure/search-documents":
+      optional: true
+    "@azure/storage-blob":
+      optional: true
+    "@browserbasehq/sdk":
+      optional: true
+    "@clickhouse/client":
+      optional: true
+    "@cloudflare/ai":
+      optional: true
+    "@datastax/astra-db-ts":
+      optional: true
+    "@elastic/elasticsearch":
+      optional: true
+    "@getmetal/metal-sdk":
+      optional: true
+    "@getzep/zep-cloud":
+      optional: true
+    "@getzep/zep-js":
+      optional: true
+    "@gomomento/sdk":
+      optional: true
+    "@gomomento/sdk-core":
+      optional: true
+    "@google-ai/generativelanguage":
+      optional: true
+    "@google-cloud/storage":
+      optional: true
+    "@gradientai/nodejs-sdk":
+      optional: true
+    "@huggingface/inference":
+      optional: true
+    "@layerup/layerup-security":
+      optional: true
+    "@mendable/firecrawl-js":
+      optional: true
+    "@mlc-ai/web-llm":
+      optional: true
+    "@mozilla/readability":
+      optional: true
+    "@neondatabase/serverless":
+      optional: true
+    "@notionhq/client":
+      optional: true
+    "@opensearch-project/opensearch":
+      optional: true
+    "@pinecone-database/pinecone":
+      optional: true
+    "@planetscale/database":
+      optional: true
+    "@premai/prem-sdk":
+      optional: true
+    "@qdrant/js-client-rest":
+      optional: true
+    "@raycast/api":
+      optional: true
+    "@rockset/client":
+      optional: true
+    "@smithy/eventstream-codec":
+      optional: true
+    "@smithy/protocol-http":
+      optional: true
+    "@smithy/signature-v4":
+      optional: true
+    "@smithy/util-utf8":
+      optional: true
+    "@spider-cloud/spider-client":
+      optional: true
+    "@supabase/postgrest-js":
+      optional: true
+    "@supabase/supabase-js":
+      optional: true
+    "@tensorflow-models/universal-sentence-encoder":
+      optional: true
+    "@tensorflow/tfjs-converter":
+      optional: true
+    "@tensorflow/tfjs-core":
+      optional: true
+    "@upstash/ratelimit":
+      optional: true
+    "@upstash/redis":
+      optional: true
+    "@upstash/vector":
+      optional: true
+    "@vercel/kv":
+      optional: true
+    "@vercel/postgres":
+      optional: true
+    "@writerai/writer-sdk":
+      optional: true
+    "@xata.io/client":
+      optional: true
+    "@xenova/transformers":
+      optional: true
+    "@zilliz/milvus2-sdk-node":
+      optional: true
+    apify-client:
+      optional: true
+    assemblyai:
+      optional: true
+    better-sqlite3:
+      optional: true
+    cassandra-driver:
+      optional: true
+    cborg:
+      optional: true
+    cheerio:
+      optional: true
+    chromadb:
+      optional: true
+    closevector-common:
+      optional: true
+    closevector-node:
+      optional: true
+    closevector-web:
+      optional: true
+    cohere-ai:
+      optional: true
+    convex:
+      optional: true
+    couchbase:
+      optional: true
+    crypto-js:
+      optional: true
+    d3-dsv:
+      optional: true
+    discord.js:
+      optional: true
+    dria:
+      optional: true
+    duck-duck-scrape:
+      optional: true
+    epub2:
+      optional: true
+    faiss-node:
+      optional: true
+    firebase-admin:
+      optional: true
+    google-auth-library:
+      optional: true
+    googleapis:
+      optional: true
+    hnswlib-node:
+      optional: true
+    html-to-text:
+      optional: true
+    ignore:
+      optional: true
+    interface-datastore:
+      optional: true
+    ioredis:
+      optional: true
+    it-all:
+      optional: true
+    jsdom:
+      optional: true
+    jsonwebtoken:
+      optional: true
+    llmonitor:
+      optional: true
+    lodash:
+      optional: true
+    lunary:
+      optional: true
+    mammoth:
+      optional: true
+    mongodb:
+      optional: true
+    mysql2:
+      optional: true
+    neo4j-driver:
+      optional: true
+    node-llama-cpp:
+      optional: true
+    notion-to-md:
+      optional: true
+    officeparser:
+      optional: true
+    pdf-parse:
+      optional: true
+    pg:
+      optional: true
+    pg-copy-streams:
+      optional: true
+    pickleparser:
+      optional: true
+    playwright:
+      optional: true
+    portkey-ai:
+      optional: true
+    puppeteer:
+      optional: true
+    redis:
+      optional: true
+    replicate:
+      optional: true
+    sonix-speech-recognition:
+      optional: true
+    srt-parser-2:
+      optional: true
+    typeorm:
+      optional: true
+    typesense:
+      optional: true
+    usearch:
+      optional: true
+    vectordb:
+      optional: true
+    voy-search:
+      optional: true
+    weaviate-ts-client:
+      optional: true
+    web-auth-library:
+      optional: true
+    ws:
+      optional: true
+    youtube-transcript:
+      optional: true
+    youtubei.js:
+      optional: true
+  checksum: 337c8e37919b753c7818ca0a722f4d3de79b9df7ba3e5cdac9a40453db4bf13c15025cd9a2b8e64bdb4277ffefe1483e9c3ee1db01db83c0472bbf60e812598b
+  languageName: node
+  linkType: hard
+
+"@langchain/core@npm:>0.1.56 <0.3.0, @langchain/core@npm:>0.2.0 <0.3.0, @langchain/core@npm:>=0.2.5 <0.3.0, @langchain/core@npm:>=0.2.8 <0.3.0, @langchain/core@npm:~0.2.0, @langchain/core@npm:~0.2.9":
   version: 0.2.10
   resolution: "@langchain/core@npm:0.2.10"
   dependencies:
@@ -84,29 +465,42 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@langchain/openai@file:../../../../../libs/langchain-openai::locator=chrome_ai%40workspace%3A.":
-  version: 0.2.0
-  resolution: "@langchain/openai@file:../../../../../libs/langchain-openai#../../../../../libs/langchain-openai::hash=1fbca0&locator=chrome_ai%40workspace%3A."
+"@langchain/openai@file:../../../../../../langchain-openai::locator=chrome_ai%40workspace%3A.":
+  version: 0.2.1
+  resolution: "@langchain/openai@file:../../../../../../langchain-openai#../../../../../../langchain-openai::hash=54b7d6&locator=chrome_ai%40workspace%3A."
   dependencies:
     "@langchain/core": ">=0.2.8 <0.3.0"
     js-tiktoken: ^1.0.12
     openai: ^4.49.1
     zod: ^3.22.4
     zod-to-json-schema: ^3.22.3
-  checksum: bee5a6cebd31e036d531fe00f3fa477bf41f18778931753cf9ed1b3acab35fd2fc2baf0192b5a05e709736ec0a117e73440ce01975a5bde7b902ca58cf708344
+  checksum: 448dfb7a2b99f4d742d2a328e473d59b5a578db05c843b378b0f88c85bdbd540a9f24451e427177915b5da31bed85665ad086c514d36ee20a1b76ac95a957883
   languageName: node
   linkType: hard
 
-"@langchain/openai@npm:>=0.1.0 <0.3.0":
-  version: 0.2.0
-  resolution: "@langchain/openai@npm:0.2.0"
+"@langchain/openai@npm:~0.0.28":
+  version: 0.0.34
+  resolution: "@langchain/openai@npm:0.0.34"
   dependencies:
-    "@langchain/core": ">=0.2.8 <0.3.0"
+    "@langchain/core": ">0.1.56 <0.3.0"
+    js-tiktoken: ^1.0.12
+    openai: ^4.41.1
+    zod: ^3.22.4
+    zod-to-json-schema: ^3.22.3
+  checksum: d2a5568b7fd0507af2510d68cf568945d5c7f6e45f57ac1178f65d0092e0437e7c908e2af3e20b829ce4507f63e71ddc38df7dc35b7e3d21394daa380243e297
+  languageName: node
+  linkType: hard
+
+"@langchain/openai@npm:~0.1.0":
+  version: 0.1.3
+  resolution: "@langchain/openai@npm:0.1.3"
+  dependencies:
+    "@langchain/core": ">=0.2.5 <0.3.0"
     js-tiktoken: ^1.0.12
     openai: ^4.49.1
     zod: ^3.22.4
     zod-to-json-schema: ^3.22.3
-  checksum: 47b7fb04a968bad9a69363eeaf6e7ec956179f49d0317779e5604f3197ac637888bdb2854025f117bf89455bcf2a6cf4fae17a16c21563135ee68a9fee2bbdec
+  checksum: 43aaafad2e1416bc23846c6c5084502025d3972c0b11b2ef2bcefd9da3dc1cd933cdf838c596404584af024adccc26e34476fededed0e614a19b47a4e5a8c8e5
   languageName: node
   linkType: hard
 
@@ -589,9 +983,9 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "chrome_ai@workspace:."
   dependencies:
-    "@langchain/openai": "file:../../../../../libs/langchain-openai"
+    "@langchain/community": "file:../../../../../"
+    "@langchain/openai": "file:../../../../../../langchain-openai"
     http-server: ^14.0.1
-    langchain: "file:../../../../"
     webpack: ^5.92.1
     webpack-cli: ^5.1.4
   languageName: unknown
@@ -816,6 +1210,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"expr-eval@npm:^2.0.2":
+  version: 2.0.2
+  resolution: "expr-eval@npm:2.0.2"
+  checksum: 01862f09b50b17b45a6268b1153280afede99e1b51752a323661f7f4010eaed34cd6c682bf439b7f8a92df6aa82f326f0ce0aa20964d175feee97377fe53921d
+  languageName: node
+  linkType: hard
+
 "fast-deep-equal@npm:^3.1.1":
   version: 3.1.3
   resolution: "fast-deep-equal@npm:3.1.3"
@@ -1163,19 +1564,19 @@ __metadata:
   languageName: node
   linkType: hard
 
-"langchain@file:../../../../::locator=chrome_ai%40workspace%3A.":
-  version: 0.2.7
-  resolution: "langchain@file:../../../../#../../../../::hash=4f9e2d&locator=chrome_ai%40workspace%3A."
+"langchain@npm:0.2.3":
+  version: 0.2.3
+  resolution: "langchain@npm:0.2.3"
   dependencies:
     "@langchain/core": ~0.2.0
-    "@langchain/openai": ">=0.1.0 <0.3.0"
+    "@langchain/openai": ~0.0.28
     "@langchain/textsplitters": ~0.0.0
     binary-extensions: ^2.2.0
     js-tiktoken: ^1.0.12
     js-yaml: ^4.1.0
     jsonpointer: ^5.0.1
     langchainhub: ~0.0.8
-    langsmith: ~0.1.30
+    langsmith: ~0.1.7
     ml-distance: ^4.0.0
     openapi-types: ^12.1.3
     p-retry: 4
@@ -1227,7 +1628,7 @@ __metadata:
     redis: ^4.6.4
     sonix-speech-recognition: ^2.1.1
     srt-parser-2: ^1.2.3
-    typeorm: ^0.3.20
+    typeorm: ^0.3.12
     weaviate-ts-client: "*"
     web-auth-library: ^1.0.3
     ws: ^8.14.2
@@ -1334,7 +1735,7 @@ __metadata:
       optional: true
     youtubei.js:
       optional: true
-  checksum: b5094561ed6a8826c8c8240f492372ba7dd3afdeecce3ec1fdd9c7e85d99428e0e70849d3dc1681e834d378f62f1e7f9f5e407ff3dcbc87287c26191657f9c31
+  checksum: 92507963c919a2d6c9bc20055b93b1271045ba760f9af340d1fe7ef9a2a3c6382eaf6c622bed16c5680a6bf26553520cbafd13fd94b8e66b176ba31fe8106020
   languageName: node
   linkType: hard
 
@@ -1345,7 +1746,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"langsmith@npm:~0.1.30":
+"langsmith@npm:~0.1.30, langsmith@npm:~0.1.7":
   version: 0.1.34
   resolution: "langsmith@npm:0.1.34"
   dependencies:
@@ -1561,7 +1962,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"openai@npm:^4.49.1":
+"openai@npm:^4.41.1, openai@npm:^4.49.1":
   version: 4.52.1
   resolution: "openai@npm:4.52.1"
   dependencies:
@@ -2204,7 +2605,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"zod-to-json-schema@npm:^3.22.3":
+"zod-to-json-schema@npm:^3.22.3, zod-to-json-schema@npm:^3.22.5":
   version: 3.23.1
   resolution: "zod-to-json-schema@npm:3.23.1"
   peerDependencies:
@@ -2213,7 +2614,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"zod@npm:^3.22.4":
+"zod@npm:^3.22.3, zod@npm:^3.22.4":
   version: 3.23.8
   resolution: "zod@npm:3.23.8"
   checksum: 15949ff82118f59c893dacd9d3c766d02b6fa2e71cf474d5aa888570c469dbf5446ac5ad562bb035bf7ac9650da94f290655c194f4a6de3e766f43febd432c5c
diff --git a/langchain/src/experimental/chrome_ai/chat_models.ts b/libs/langchain-community/src/experimental/chat_models/chrome_ai/chat_models.ts
similarity index 100%
rename from langchain/src/experimental/chrome_ai/chat_models.ts
rename to libs/langchain-community/src/experimental/chat_models/chrome_ai/chat_models.ts
diff --git a/libs/langchain-community/src/load/import_map.ts b/libs/langchain-community/src/load/import_map.ts
index d06053cbde26..06afe430b297 100644
--- a/libs/langchain-community/src/load/import_map.ts
+++ b/libs/langchain-community/src/load/import_map.ts
@@ -77,3 +77,4 @@ export * as utils__event_source_parse from "../utils/event_source_parse.js";
 export * as experimental__callbacks__handlers__datadog from "../experimental/callbacks/handlers/datadog.js";
 export * as experimental__graph_transformers__llm from "../experimental/graph_transformers/llm.js";
 export * as experimental__chat_models__ollama_functions from "../experimental/chat_models/ollama_functions.js";
+export * as experimental__chat_models__chrome_ai from "../experimental/chat_models/chrome_ai/chat_models.js";

From 6aa2a9d43b9f92e323ea1c6c4402eaaef1bd5ed5 Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Thu, 27 Jun 2024 16:57:08 -0700
Subject: [PATCH 14/15] nits

---
 .../src/experimental/chat_models/chrome_ai/app/README.md   | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/README.md b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/README.md
index aa0cc34642b3..d16118000176 100644
--- a/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/README.md
+++ b/libs/langchain-community/src/experimental/chat_models/chrome_ai/app/README.md
@@ -1,17 +1,18 @@
 # ChatChromeAI
 
 This is a simple application designed to run in the browser that uses the webGPU and Gemini Nano.
-Gemini Nano is a LLM which Google Chrome has embedded in the browser. As of 06/26/2024 it is still in beta. To request access or find more information, please visit [this link](https://developer.chrome.com/docs/ai/built-in).
+Gemini Nano is a LLM which Google Chrome has embedded in the browser. As of 06/26/2024 it is still in beta.
+To request access or find more information, please visit [this link](https://developer.chrome.com/docs/ai/built-in).
 
 ## Getting Started
 
 To run this application, you'll first need to build the locally dependencies. From the root of the `langchain-ai/langchainjs` repo, run the following command:
 
 ```bash
-yarn build --filter=langchain --filter=@langchain/openai
+yarn build --filter=@langchain/community --filter=@langchain/openai
 ```
 
-Once the dependencies are built, navigate into this directory (`langchain/src/experimental/chrome_ai/app`) and run the following command:
+Once the dependencies are built, navigate into this directory (`libs/langchain-community/src/experimental/chat_models/chrome_ai/app`) and run the following commands:
 
 ```bash
 yarn install # install the dependencies

From 33a04d675d97c0bbe32d904c0a439cb087c9cb25 Mon Sep 17 00:00:00 2001
From: bracesproul <braceasproul@gmail.com>
Date: Thu, 27 Jun 2024 17:30:08 -0700
Subject: [PATCH 15/15] allow for custom prompt formatters

---
 .../experimental/chat_models/chrome_ai/chat_models.ts    | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/libs/langchain-community/src/experimental/chat_models/chrome_ai/chat_models.ts b/libs/langchain-community/src/experimental/chat_models/chrome_ai/chat_models.ts
index 79fe73493ef0..83c8e74171d3 100644
--- a/libs/langchain-community/src/experimental/chat_models/chrome_ai/chat_models.ts
+++ b/libs/langchain-community/src/experimental/chat_models/chrome_ai/chat_models.ts
@@ -38,6 +38,10 @@ export const enum AIModelAvailability {
 export interface ChromeAIInputs extends BaseChatModelParams {
   topK?: number;
   temperature?: number;
+  /**
+   * An optional function to format the prompt before sending it to the model.
+   */
+  promptFormatter?: (messages: BaseMessage[]) => string;
 }
 
 export interface ChromeAICallOptions extends BaseLanguageModelCallOptions {}
@@ -81,6 +85,8 @@ export class ChatChromeAI extends SimpleChatModel<ChromeAICallOptions> {
 
   topK = 40;
 
+  promptFormatter: (messages: BaseMessage[]) => string;
+
   static lc_name() {
     return "ChatChromeAI";
   }
@@ -92,6 +98,7 @@ export class ChatChromeAI extends SimpleChatModel<ChromeAICallOptions> {
     });
     this.temperature = inputs?.temperature ?? this.temperature;
     this.topK = inputs?.topK ?? this.topK;
+    this.promptFormatter = inputs?.promptFormatter ?? formatPrompt;
   }
 
   _llmType() {
@@ -142,7 +149,7 @@ export class ChatChromeAI extends SimpleChatModel<ChromeAICallOptions> {
     if (!this.session) {
       throw new Error("Session not found. Please call `.initialize()` first.");
     }
-    const textPrompt = formatPrompt(messages);
+    const textPrompt = this.promptFormatter(messages);
 
     const stream = this.session.promptStreaming(textPrompt);
     const iterableStream = IterableReadableStream.fromReadableStream(stream);