docs: added local node deprecation notice

hedera/networks/localnet.mdx

@@ -2,6 +2,11 @@
 title: Localnet
 sidebarTitle: Overview
 ---
+
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
+
 ## Introduction
 
 The Hedera Localnet provides developers with a comprehensive framework for locally testing and refining Hedera-based applications. By operating outside the public networks, Localnet is crucial in the software development lifecycle, eliminating network I/O bottlenecks, minimizing shared resource conflicts, and offering complete control over network configurations. This local network comprises of two primary product offerings, [Local Node](https://github.com/hashgraph/hedera-local-node) and [Solo](https://github.com/hashgraph/solo), each serving distinct purposes in the development and testing process. For developers just getting started with Local Node, here is the recommended path for testing:

hedera/networks/localnet/multinode-configuration.mdx

@@ -2,6 +2,9 @@
 title: "Multinode Configuration"
 ---
 
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
 
 ## Using Multinode Configuration
 

hedera/networks/localnet/single-node-configuration.mdx

@@ -2,6 +2,9 @@
 title: "Single Node Configuration"
 ---
 
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
 
 ## Using Single Node Configuration
 

hedera/sdks-and-apis/sdks/set-up-your-local-network.mdx

@@ -2,6 +2,9 @@
 title: "Set Up Your Local Network"
 ---
 
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
 
 While you are developing your application, you can use the Hedera-supported networks (previewnet and testnet) to test your application against. In addition to using those networks, you have the option to set up your own local consensus node and mirror node for testing purposes.
 

hedera/tutorials/local-node.mdx

@@ -3,6 +3,9 @@ title: Local Node
 sidebarTitle: Overview
 ---
 
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
 
 <Columns cols={2}>
 <Card title="How to Run Hedera Local Node in a Cloud Development Environment (CDE)" href="/hedera/tutorials/local-node/how-to-run-hedera-local-node-in-a-cloud-development-environment-cde" />

hedera/tutorials/local-node/how-to-run-hedera-local-node-in-a-cloud-development-environment-cde.mdx

@@ -2,6 +2,15 @@
 title: How to Run Hedera Local Node in a Cloud Development Environment (CDE)
 sidebarTitle: Overview
 ---
+
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
+
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
+
 The [**Hedera Local Node**](https://github.com/hashgraph/hedera-local-node) project enables developers to establish their own local network for development and testing. The local network comprises the consensus node, mirror node, [JSON-RPC relay](https://github.com/hashgraph/hedera-json-rpc-relay#readme), and other Consensus Node services be set up without Docker and draining your computer’s resources by using .Cloud Development Environments (CDEs). CDEs allows developers to work from any device without the need to maintain static and brittle local development environments.
 
 ## **Available Services**

hedera/tutorials/local-node/how-to-run-hedera-local-node-in-a-cloud-development-environment-cde/codespaces.mdx

@@ -2,6 +2,9 @@
 title: "Run a Local Node in Codespaces"
 ---
 
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
 
 Codespaces is a cloud development environment (CDE) that's hosted in the cloud. You can customize your project for GitHub Codespaces by committing configuration files to your repository (often known as Configuration-as-Code), which creates a repeatable codespaces configuration for all users of your project. [GitHub Codespaces overview](https://docs.github.com/en/codespaces/overview)
 

hedera/tutorials/local-node/how-to-run-hedera-local-node-in-a-cloud-development-environment-cde/gitpod.mdx

@@ -2,6 +2,9 @@
 title: "Run a Local Node in Gitpod"
 ---
 
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
 
 The local network comprises the consensus node, mirror node, [JSON-RPC relay](https://github.com/hashgraph/hedera-json-rpc-relay#readme), and other Consensus Node services and now be set up without Docker and draining your computer’s resources by using Gitpod. Gitpod provides Cloud Development Environments (CDEs) and allows developers to work from any device without the need to maintain static and brittle local development environments. By the end of this tutorial, you will have your Hedera local node running on Gitpod.
 

hedera/tutorials/local-node/how-to-set-up-a-hedera-local-node.mdx

@@ -2,6 +2,9 @@
 title: "How to Set Up a Hedera Local Node"
 ---
 
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
 
 The [**Hedera Local Node**](https://github.com/hashgraph/hedera-local-node) project enables developers to establish their own local network for development and testing. The local network comprises the consensus node, mirror node, [JSON-RPC relay](https://github.com/hashgraph/hedera-json-rpc-relay#readme), and other Hedera products, and can be set up using the CLI tool and Docker. This setup allows you to seamlessly build and deploy smart contracts from your local environment.
 

hedera/tutorials/local-node/setup-hedera-node-cli-npm.mdx

@@ -2,6 +2,10 @@
 title: "Set Up a Hedera Local Node using the NPM CLI"
 ---
 
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
+
 Hedera is an open-source, public, proof-of-stake network. Its network services offer low and fixed fees, 10k TPS, and instant transaction finality. Learn more about the [Hedera platform and how it works](https://hedera.com/how-it-works).
 
 In this tutorial, we will adopt, set up, and run a Hedera node locally using the [@hashgraph/hedera-local](https://www.npmjs.com/package/@hashgraph/hedera-local) NPM Command Line Interface (CLI) tool with `docker compose`.

hedera/tutorials/smart-contracts/configuring-hardhat-with-hiero-local-node-a-step-by-step-guide.mdx

@@ -2,6 +2,10 @@
 title: "Configuring Hardhat with Hedera Localnet/Testnet: A Step-by-Step Guide"
 ---
 
+import LocalNodeDeprecation from '/snippets/local-node-deprecation.mdx';
+
+<LocalNodeDeprecation />
+
 Developers building smart contracts on Hedera often use the **Hedera JSON-RPC Relay** to enable EVM tools like **Hardhat**. In this post, we'll walk through how to set up Hardhat to work with the **Hiero Local Node**, allowing for local deployment, debugging, and testing of smart contracts without using testnet resources.
 
 <Check>

snippets/local-node-deprecation.mdx

@@ -0,0 +1,4 @@
+<Warning>
+**Hiero Local Node Deprecation (September 2026)**
+Hiero Local Node is entering a 6-month deprecation period. Support ends September 2026. Migrate local testing and CI workflows to [Solo](https://solo.hiero.org/v0.60.0/docs) before then. [Learn more](https://hedera.com/blog/hiero-local-node-deprecation-6-month-transition-to-solo/).
+</Warning>