chore: sync langgraph docs from langchain-ai/docs

[keithrich98]

Automated sync of src/oss/langgraph/ from
langchain-ai/docs.

This PR was created automatically by the Sync docs workflow.

[Copilot]

Pull request overview

Automated synchronization of LangGraph documentation content from langchain-ai/docs into this repo’s src/oss/langgraph/ docs set.

Changes:

• Sync MDX pages (UI, Studio, Quickstart, Observability, Deploy, Durable execution, and frontend graph execution docs).
• Update several embedded code/documentation snippets and callout languages.
• Remove the existing README.md content.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
ui.mdx	Updates snippet import/render for the Agent Chat UI page.
studio.mdx	Minor text change in Studio setup page intro.
quickstart.mdx	Updates referenced model version string in the quickstart narrative.
observability.mdx	Updates code fence language and modifies a TypeScript invocation example.
frontend/graph-execution.mdx	Changes callout language marker near the useStream setup section.
durable-execution.mdx	Alters numbering of an ordered list item in requirements.
deploy.mdx	Modifies the REST API curl example and adds an inline comment in the payload.
agentic-rag.mdx	Changes TypeScript imports and the StateGraph state identifier in an example.
README.md	Removes the existing single-line header content.

Comments suppressed due to low confidence (1)

observability.mdx:161

• This TypeScript example is syntactically invalid: config: { ... } cannot appear as a standalone argument; the second parameter to agent.invoke should be an object literal (e.g., { tags: ..., metadata: ... }) or whatever the API expects. As written, the snippet will not compile/run.

await agent.invoke(
  {
    messages: [{role: "user", content: "Send a test email to alice@example.com"}]
  },
  config: {
    tags: ["production", "email-assistant", "v1.0"],
    metadata: {
      userId: "user123",
      sessionId: "session456",
      environment: "production"
    }
  },
);

---

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[Copilot]

This callout is marked :::python, but the content and surrounding text are TypeScript/JS (useStream, TypeScript interface, import type ...). Update the callout language to :::js (or :::ts if supported) so the docs render correctly.

Suggested change

	:::python
	:::ts

[keithrich98]

@copilot why is this typescript? What is this front-end mdx

[Copilot]

Good catch — this section is in frontend/graph-execution.mdx, which documents frontend usage (@langchain/react / @langchain/vue) and includes typed useStream examples, so the callout should be TypeScript. I fixed the callout language from python to ts in commit 6703eeb.

[Copilot]

The REST curl example is broken: the X-Api-Key header line is missing its closing quote and trailing \, and the JSON payload contains an inline backtick comment that will make the request body invalid JSON. Please restore valid shell quoting and keep comments outside the JSON string.

[Copilot]

This snippet switches AIMessage to import { AIMessage } from "langchain", but elsewhere in this doc the TypeScript examples import message classes from @langchain/core/messages. To avoid inconsistent guidance (and potential runtime import issues), keep the import source consistent with the other snippets in this page.

Suggested change

	import { AIMessage } from "langchain";
	import { AIMessage } from "@langchain/core/messages";

[Copilot]

In MDX/JSX, lowercase tag names are treated as HTML elements rather than React components, so <agent_chat_ui /> will not render the imported snippet component. Use a PascalCase identifier for the import and JSX usage (e.g., keep AgentChatUi and <AgentChatUi />).

[Copilot]

Grammar: "This pages describes" should be singular ("This page describes").

Suggested change

	This pages describes how to set up Studio with your local LangChain agent.
	This page describes how to set up Studio with your local LangChain agent.

[Copilot]

The ordered list numbering is inconsistent (1, 2, 1). Either make the third item 3. or use consistent markdown-style numbering for all items (e.g., all 1.) to avoid confusing rendered output and future edits.

Suggested change

1. Wrap any non-deterministic operations (e.g., random number generation) or operations with side effects (e.g., file writes, API calls) inside @[tasks][task] to ensure that when a workflow is resumed, these operations are not repeated for the particular run, and instead their results are retrieved from the persistence layer. For more information, see [Determinism and Consistent Replay](#determinism-and-consistent-replay).

3. Wrap any non-deterministic operations (e.g., random number generation) or operations with side effects (e.g., file writes, API calls) inside @[tasks][task] to ensure that when a workflow is resumed, these operations are not repeated for the particular run, and instead their results are retrieved from the persistence layer. For more information, see [Determinism and Consistent Replay](#determinism-and-consistent-replay).

[Copilot]

GraphState is not defined anywhere in this page (and the surrounding snippets use typeof State for typing), so new StateGraph(GraphState) will not compile. Use the same state schema identifier used elsewhere in the example (likely State).

Suggested change

	const builder = new StateGraph(GraphState)
	const builder = new StateGraph(State)

[Copilot]

This fenced block contains shell export ... commands but is labeled as python, which will render incorrect syntax highlighting and can confuse readers. Change the fence language to bash/shell.

Suggested change

	```python
	```bash