Rename lang-graph files to langgraph and fix guide copy

- Rename lang-graph-message-per-response/token to langgraph-message-per-response/token
- Update nav links and index page to match new filenames
- Replace "NPM package" with "Node project" across all guides

Author: GregHolmes

src/data/nav/aitransport.ts

@@ -140,11 +140,11 @@ export default {
           pages: [
             {
               name: 'Message per response',
-              link: '/docs/ai-transport/guides/langgraph/lang-graph-message-per-response',
+              link: '/docs/ai-transport/guides/langgraph/langgraph-message-per-response',
             },
             {
               name: 'Message per token',
-              link: '/docs/ai-transport/guides/langgraph/lang-graph-message-per-token',
+              link: '/docs/ai-transport/guides/langgraph/langgraph-message-per-token',
             },
             {
               name: 'Human-in-the-loop',

src/pages/docs/ai-transport/guides/anthropic/anthropic-citations.mdx

@@ -27,7 +27,7 @@ Useful links:
 - [Anthropic Citations documentation](https://docs.anthropic.com/en/docs/build-with-claude/citations)
 - [Ably JavaScript SDK getting started](/docs/getting-started/javascript)
 
-Create a new NPM package, which will contain the agent and client code:
+Create a new Node project, which will contain the agent and client code:
 
 <Code>
 ```shell

src/pages/docs/ai-transport/guides/anthropic/anthropic-human-in-the-loop.mdx

@@ -25,7 +25,7 @@ Useful links:
 - [Anthropic tool use guide](https://docs.anthropic.com/en/docs/build-with-claude/tool-use/overview)
 - [Ably JavaScript SDK getting started](/docs/getting-started/javascript)
 
-Create a new NPM package, which will contain the agent, client, and server code:
+Create a new Node project, which will contain the agent, client, and server code:
 
 <Code>
 ```shell

src/pages/docs/ai-transport/guides/anthropic/anthropic-message-per-response.mdx

@@ -42,7 +42,7 @@ Useful links:
 ### Agent setup
 
 <If agentLang="javascript">
-Create a new npm package for the agent code:
+Create a new Node project for the agent code:
 
 <Code>
 ```shell
@@ -109,7 +109,7 @@ export ANTHROPIC_API_KEY="your_api_key_here"
 ### Client setup
 
 <If clientLang="javascript">
-Create a new npm package for the client code, or use the same project as the agent if both are JavaScript:
+Create a new Node project for the client code, or use the same project as the agent if both are JavaScript:
 
 <Code>
 ```shell

src/pages/docs/ai-transport/guides/anthropic/anthropic-message-per-token.mdx

@@ -42,7 +42,7 @@ Useful links:
 ### Agent setup
 
 <If agentLang="javascript">
-Create a new npm package for the agent code:
+Create a new Node project for the agent code:
 
 <Code>
 ```shell
@@ -109,7 +109,7 @@ export ANTHROPIC_API_KEY="your_api_key_here"
 ### Client setup
 
 <If clientLang="javascript">
-Create a new npm package for the client code, or use the same project as the agent if both are JavaScript:
+Create a new Node project for the client code, or use the same project as the agent if both are JavaScript:
 
 <Code>
 ```shell

…raph/lang-graph-message-per-response.mdx …graph/langgraph-message-per-response.mdxsrc/pages/docs/ai-transport/guides/langgraph/lang-graph-message-per-response.mdx renamed to src/pages/docs/ai-transport/guides/langgraph/langgraph-message-per-response.mdx src/pages/docs/ai-transport/guides/langgraph/lang-graph-message-per-response.mdx renamed to src/pages/docs/ai-transport/guides/langgraph/langgraph-message-per-response.mdx

@@ -3,8 +3,8 @@ title: "Guide: Stream LangGraph responses using the message-per-response pattern
 meta_description: "Stream tokens from LangGraph over Ably in realtime using message appends."
 meta_keywords: "AI, token streaming, LangGraph, LangChain, Anthropic, AI transport, Ably, realtime, message appends"
 redirect_from:
-  - /docs/guides/ai-transport/lang-graph-message-per-response
-  - /docs/guides/ai-transport/langgraph/lang-graph-message-per-response
+  - /docs/guides/ai-transport/langgraph-message-per-response
+  - /docs/guides/ai-transport/langgraph/langgraph-message-per-response
 ---
 
 This guide shows you how to stream AI responses from [LangGraph](https://docs.langchain.com/oss/javascript/langgraph/overview) over Ably using the [message-per-response pattern](/docs/ai-transport/token-streaming/message-per-response). Specifically, it appends each response token to a single Ably message, creating a complete AI response that grows incrementally while delivering tokens in realtime.
@@ -26,7 +26,7 @@ Useful links:
 - [LangGraph documentation](https://docs.langchain.com/oss/javascript/langgraph/overview)
 - [Ably JavaScript SDK getting started](/docs/getting-started/javascript)
 
-Create a new NPM package, which will contain the publisher and subscriber code:
+Create a new Node project, which will contain the publisher and subscriber code:
 
 <Code>
 ```shell

…nggraph/lang-graph-message-per-token.mdx …anggraph/langgraph-message-per-token.mdxsrc/pages/docs/ai-transport/guides/langgraph/lang-graph-message-per-token.mdx renamed to src/pages/docs/ai-transport/guides/langgraph/langgraph-message-per-token.mdx src/pages/docs/ai-transport/guides/langgraph/lang-graph-message-per-token.mdx renamed to src/pages/docs/ai-transport/guides/langgraph/langgraph-message-per-token.mdx

@@ -3,8 +3,8 @@ title: "Guide: Stream LangGraph responses using the message-per-token pattern"
 meta_description: "Stream tokens from LangGraph over Ably in realtime."
 meta_keywords: "AI, token streaming, LangGraph, LangChain, Anthropic, AI transport, Ably, realtime"
 redirect_from:
-  - /docs/guides/ai-transport/lang-graph-message-per-token
-  - /docs/guides/ai-transport/langgraph/lang-graph-message-per-token
+  - /docs/guides/ai-transport/langgraph-message-per-token
+  - /docs/guides/ai-transport/langgraph/langgraph-message-per-token
 ---
 
 This guide shows you how to stream AI responses from [LangGraph](https://docs.langchain.com/oss/javascript/langgraph/overview) over Ably using the [message-per-token pattern](/docs/ai-transport/token-streaming/message-per-token). Specifically, it implements the [explicit start/stop events approach](/docs/ai-transport/token-streaming/message-per-token#explicit-events), which publishes each response token as an individual message, along with explicit lifecycle events to signal when responses begin and end.

src/pages/docs/ai-transport/guides/openai/openai-citations.mdx

@@ -27,7 +27,7 @@ Useful links:
 - [OpenAI Web Search documentation](https://platform.openai.com/docs/guides/tools-web-search)
 - [Ably JavaScript SDK getting started](/docs/getting-started/javascript)
 
-Create a new NPM package, which will contain the publisher and subscriber code:
+Create a new Node project, which will contain the publisher and subscriber code:
 
 <Code>
 ```shell

src/pages/docs/ai-transport/guides/openai/openai-human-in-the-loop.mdx

@@ -25,7 +25,7 @@ Useful links:
 - [OpenAI function calling guide](https://platform.openai.com/docs/guides/function-calling)
 - [Ably JavaScript SDK getting started](/docs/getting-started/javascript)
 
-Create a new NPM package, which will contain the agent, client, and server code:
+Create a new Node project, which will contain the agent, client, and server code:
 
 <Code>
 ```shell

src/pages/docs/ai-transport/guides/openai/openai-message-per-response.mdx

@@ -26,7 +26,7 @@ Useful links:
 - [OpenAI developer quickstart](https://platform.openai.com/docs/quickstart)
 - [Ably JavaScript SDK getting started](/docs/getting-started/javascript)
 
-Create a new NPM package, which will contain the publisher and subscriber code:
+Create a new Node project, which will contain the publisher and subscriber code:
 
 <Code>
 ```shell