diff --git a/superset-core/README.md b/superset-core/README.md
index 0ca50a252f7..61fefbac142 100644
--- a/superset-core/README.md
+++ b/superset-core/README.md
@@ -31,70 +31,70 @@ The official core package for building Apache Superset backend extensions and in
 pip install apache-superset-core
 ```
 
-## 🏗️ Architecture
+## 🏗️ Package Structure
 
-The package is organized into logical modules, each providing specific functionality:
-
-- **`api`** - REST API base classes, models access, query utilities, and registration
-- **`api.models`** - Access to Superset's database models (datasets, databases, etc.)
-- **`api.query`** - Database query utilities and SQL dialect handling
-- **`api.rest_api`** - Extension API registration and management
-- **`api.types.rest_api`** - REST API base classes and type definitions
+```
+src/superset_core/
+├── common/
+├── extensions/
+├── mcp/
+├── queries/
+├── rest_api/
+├── tasks/
+└── __init__.py
+```
 
 ## 🚀 Quick Start
 
-### Basic Extension Structure
+### Basic Extension API
 
 ```python
-from flask import request, Response
 from flask_appbuilder.api import expose, permission_name, protect, safe
-from superset_core import common, queries, rest_api
 from superset_core.rest_api.api import RestApi
+from superset_core.rest_api.decorators import api
 
+
+@api(id="dataset_references", name="Dataset References API")
 class DatasetReferencesAPI(RestApi):
-    """Example extension API demonstrating core functionality."""
-
-    resource_name = "dataset_references"
-    openapi_spec_tag = "Dataset references"
-    class_permission_name = "dataset_references"
 
     @expose("/metadata", methods=("POST",))
     @protect()
     @safe
     @permission_name("read")
     def metadata(self) -> Response:
-        """Get dataset metadata for tables referenced in SQL."""
-        sql: str = request.json.get("sql")
-        database_id: int = request.json.get("databaseId")
-
-        # Access Superset's models using core APIs
-        databases = models.get_databases(id=database_id)
-        if not databases:
-            return self.response_404()
-
-        database = databases[0]
-        dialect = query.get_sqlglot_dialect(database)
-
-        # Access datasets to get owner information
-        datasets = models.get_datasets()
-        owners_map = {
-            dataset.table_name: [
-                f"{owner.first_name} {owner.last_name}"
-                for owner in dataset.owners
-            ]
-            for dataset in datasets
-        }
-
-        # Process SQL and return dataset metadata
-        return self.response(200, result=owners_map)
-
-# Register the extension API
-rest_api.add_extension_api(DatasetReferencesAPI)
+        # ... endpoint implementation
 ```
 
-## 🤝 Contributing
+### Background Tasks
 
-We welcome contributions! Please see the [Developer Portal](https://superset.apache.org/developer_portal/) for details.
+```python
+from superset_core.tasks.decorators import task
+from superset_core.tasks.types import TaskScope
+
+@task(name="generate_report", scope=TaskScope.SHARED)
+def generate_report(chart_id: int) -> None:
+    # ... task implementation
+```
+
+### MCP Tools
+
+```python
+from superset_core.mcp.decorators import tool
+
+@tool(name="my_tool", description="Custom business logic", tags=["extension"])
+def my_extension_tool(param: str) -> dict:
+    # ... tool implementation
+```
+
+### MCP Prompts
+
+```python
+from superset_core.mcp.decorators import prompt
+
+@prompt(name="my_prompt", title="My Prompt", description="Interactive prompt", tags={"extension"})
+async def my_prompt_handler(ctx: Context) -> str:
+    # ... prompt implementation
+```
 
 ## 📄 License
 
@@ -102,12 +102,6 @@ Licensed under the Apache License, Version 2.0. See [LICENSE](https://github.com
 
 ## 🔗 Links
 
-- [Apache Superset](https://superset.apache.org/)
-- [Documentation](https://superset.apache.org/docs/)
 - [Community](https://superset.apache.org/community/)
 - [GitHub Repository](https://github.com/apache/superset)
-- [Extension Development Guide](https://superset.apache.org/docs/extensions/)
-
----
-
-**Note**: This package is currently in release candidate status. APIs may change before the 1.0.0 release. Please check the [changelog](CHANGELOG.md) for breaking changes between versions.
+- [Extensions Documentation](https://superset.apache.org/developer-docs/extensions/overview)
diff --git a/superset-core/pyproject.toml b/superset-core/pyproject.toml
index 44b2b3df06e..57dfb231ade 100644
--- a/superset-core/pyproject.toml
+++ b/superset-core/pyproject.toml
@@ -18,7 +18,7 @@
 
 [project]
 name = "apache-superset-core"
-version = "0.0.1rc4"
+version = "0.1.0rc1"
 description = "Core Python package for building Apache Superset backend extensions and integrations"
 readme = "README.md"
 authors = [
diff --git a/superset-extensions-cli/README.md b/superset-extensions-cli/README.md
index 00b75f9ef33..a5143a80ba3 100644
--- a/superset-extensions-cli/README.md
+++ b/superset-extensions-cli/README.md
@@ -28,6 +28,7 @@ Official command-line interface for building, bundling, and managing Apache Supe
 ## 🚀 Features
 
 - **Extension Scaffolding** - Generate initial folder structure and scaffold new extension projects
+- **Validation** - Validate extension structure and configuration before building
 - **Development Server** - Automatically rebuild extensions as files change during development
 - **Build System** - Build extension assets for production deployment
 - **Bundle Packaging** - Package extensions into distributable .supx files
@@ -43,68 +44,52 @@ pip install apache-superset-extensions-cli
 ### Available Commands
 
 ```bash
-# Generate initial folder structure and scaffold a new extension project
-superset-extensions init <extension-name>
+# Scaffold a new extension project (interactive prompts, or pass options directly)
+superset-extensions init [--publisher <publisher>] [--name <name>] [--display-name <name>]
+                         [--version <version>] [--license <license>]
+                         [--frontend/--no-frontend] [--backend/--no-backend]
+
+# Validate extension structure and configuration
+superset-extensions validate
+
+# Build extension assets for production (runs validate first)
+superset-extensions build
+
+# Package extension into a distributable .supx file (runs build first)
+superset-extensions bundle [--output/-o <path>]
 
 # Automatically rebuild extension as files change during development
 superset-extensions dev
-
-# Build extension assets for production
-superset-extensions build
-
-# Package extension into a distributable .supx file
-superset-extensions bundle
 ```
 
 ## 📋 Extension Structure
 
-The CLI generates extensions with the following structure:
+The CLI scaffolds extensions with the following structure:
 
 ```
-extension_name/
+{publisher}.{name}/             # e.g., my-org.dashboard-widgets/
 ├── extension.json              # Extension configuration and metadata
-├── frontend/                   # Frontend code
-│   ├── src/                   # TypeScript/React source files
-│   ├── webpack.config.js      # Frontend build configuration
-│   ├── tsconfig.json          # TypeScript configuration
-│   └── package.json           # Frontend dependencies
-├── backend/                   # Backend code
+├── .gitignore
+├── frontend/                   # Optional frontend code
 │   ├── src/
-│   │   └── dataset_references/ # Python package source
-│   ├── tests/                 # Backend tests
-│   ├── pyproject.toml         # Python package configuration
-│   └── requirements.txt       # Python dependencies
-├── dist/                      # Built extension files (generated)
-│   ├── manifest.json          # Generated extension manifest
-│   ├── frontend/
-│   │   └── dist/              # Built frontend assets
-│   │       ├── remoteEntry.*.js  # Module federation entry
-│   │       └── *.js           # Additional frontend bundles
-│   └── backend/
-│       └── dataset_references/ # Built backend package
-│           ├── __init__.py
-│           ├── api.py
-│           └── entrypoint.py
-├── dataset_references-1.0.0.supx  # Packaged extension file (generated)
-└── README.md                  # Extension documentation
+│   │   └── index.tsx           # Frontend entry point
+│   ├── package.json
+│   ├── webpack.config.js
+│   └── tsconfig.json
+└── backend/                    # Optional backend code
+    ├── src/
+    │   └── {publisher}/        # e.g., my_org/
+    │       └── {name}/         # e.g., dashboard_widgets/
+    │           └── entrypoint.py
+    └── pyproject.toml
 ```
 
-## 🤝 Contributing
-
-We welcome contributions! Please see the [Developer Portal](https://superset.apache.org/developer_portal/) for details.
-
 ## 📄 License
 
 Licensed under the Apache License, Version 2.0. See [LICENSE](https://github.com/apache/superset/blob/master/LICENSE.txt) for details.
 
 ## 🔗 Links
 
-- [Apache Superset](https://superset.apache.org/)
-- [Extension Development Guide](https://superset.apache.org/docs/extensions/)
-- [API Documentation](https://superset.apache.org/docs/api/)
-- [GitHub Repository](https://github.com/apache/superset)
 - [Community](https://superset.apache.org/community/)
-
----
-
-**Note**: This package is currently in early development. APIs and commands may change before the 1.0.0 release. Please check the [changelog](CHANGELOG.md) for breaking changes between versions.
+- [GitHub Repository](https://github.com/apache/superset)
+- [Extensions Documentation](https://superset.apache.org/developer-docs/extensions/overview)
diff --git a/superset-extensions-cli/pyproject.toml b/superset-extensions-cli/pyproject.toml
index 4487152c171..7a09fbe274e 100644
--- a/superset-extensions-cli/pyproject.toml
+++ b/superset-extensions-cli/pyproject.toml
@@ -17,7 +17,7 @@
 
 [project]
 name = "apache-superset-extensions-cli"
-version = "0.0.1rc2"
+version = "0.1.0rc1"
 description = "Official command-line interface for building, bundling, and managing Apache Superset extensions"
 readme = "README.md"
 authors = [
diff --git a/superset-frontend/package-lock.json b/superset-frontend/package-lock.json
index 436da649f45..b0dd8471377 100644
--- a/superset-frontend/package-lock.json
+++ b/superset-frontend/package-lock.json
@@ -51390,7 +51390,7 @@
     },
     "packages/superset-core": {
       "name": "@apache-superset/core",
-      "version": "0.0.1-rc11",
+      "version": "0.1.0-rc1",
       "license": "ISC",
       "devDependencies": {
         "@babel/cli": "^7.28.6",
diff --git a/superset-frontend/packages/superset-core/README.md b/superset-frontend/packages/superset-core/README.md
index 948f8ac39d2..d9f835dab98 100644
--- a/superset-frontend/packages/superset-core/README.md
+++ b/superset-frontend/packages/superset-core/README.md
@@ -30,74 +30,98 @@ The official core package for building Apache Superset extensions and integratio
 npm install @apache-superset/core
 ```
 
-## 🏗️ Architecture
+## 🏗️ Package Structure
 
-The package is organized into logical namespaces, each providing specific functionality:
+The source is organized into focused namespaces, each in its own directory:
 
-- **`authentication`** - User authentication and authorization APIs
-- **`commands`** - Command registration and execution system
-- **`contributions`** - UI contribution points and customization APIs
-- **`core`** - Fundamental types, utilities, and lifecycle management
-- **`environment`** - Environment detection and configuration APIs
-- **`extensions`** - Extension management and metadata APIs
-- **`sqlLab`** - SQL Lab integration and event handling
+```
+src/
+├── authentication/
+├── commands/
+├── common/
+├── components/
+├── contributions/
+├── editors/
+├── extensions/
+├── menus/
+├── sqlLab/
+├── theme/
+├── translation/
+├── utils/
+├── views/
+└── index.ts
+```
 
 ## 🚀 Quick Start
 
-### Basic Extension Structure
+Frontend contributions are registered as module-level side effects from your extension's entry point.
 
-```typescript
-import {
-  core,
-  commands,
-  sqlLab,
-  authentication,
-} from '@apache-superset/core';
+### Views
 
-export function activate(context: core.ExtensionContext) {
-  // Register a command to save current query
-  const commandDisposable = commands.registerCommand(
-    'my_extension.save_query',
-    async () => {
-      const currentTab = sqlLab.getCurrentTab();
-      if (currentTab?.editor.content) {
-        const token = await authentication.getCSRFToken();
-        // Use token for secure API calls
-        console.log('Saving query with CSRF token:', token);
-      }
-    },
-  );
+Add custom panels or UI components at specific locations in the application:
 
-  // Listen for query execution events
-  const eventDisposable = sqlLab.onDidQueryRun(editor => {
-    console.log('Query executed:', editor.content.substring(0, 50) + '...');
-  });
+```tsx
+import { views } from '@apache-superset/core';
+import MyPanel from './MyPanel';
 
-  // Register a simple view
-  const viewDisposable = core.registerViewProvider(
-    'my_extension.panel',
-    () => (
-      <div>
-        <h3>My Extension</h3>
-        <button onClick={() => commands.executeCommand('my_extension.save_query')}>
-          Save Query
-        </button>
-      </div>
-    )
-  );
-
-  // Cleanup registration
-  context.subscriptions.push(commandDisposable, eventDisposable, viewDisposable);
-}
-
-export function deactivate() {
-  // Cleanup handled automatically via disposables
-}
+views.registerView(
+  { id: 'my-extension.main', name: 'My Panel Name' },
+  'sqllab.panels',
+  () => <MyPanel />,
+);
 ```
 
-## 🤝 Contributing
+### Commands
 
-We welcome contributions! Please see the [Developer Portal](https://superset.apache.org/developer_portal/) for details.
+Define named actions that can be triggered from menus, keyboard shortcuts, or code:
+
+```typescript
+import { commands } from '@apache-superset/core';
+
+commands.registerCommand(
+  {
+    id: 'my-extension.copy-query',
+    title: 'Copy Query',
+    icon: 'CopyOutlined',
+    description: 'Copy the current query to clipboard',
+  },
+  () => {
+    /* implementation */
+  },
+);
+```
+
+### Menus
+
+Attach commands to primary, secondary, or context menus at a given location:
+
+```typescript
+import { menus } from '@apache-superset/core';
+
+menus.registerMenuItem(
+  { view: 'sqllab.editor', command: 'my-extension.copy-query' },
+  'sqllab.editor',
+  'primary',
+);
+```
+
+### Editors
+
+Replace the default text editor for one or more languages:
+
+```typescript
+import { editors } from '@apache-superset/core';
+import MonacoSQLEditor from './MonacoSQLEditor';
+
+editors.registerEditor(
+  {
+    id: 'my-extension.monaco-sql',
+    name: 'Monaco SQL Editor',
+    languages: ['sql'],
+  },
+  MonacoSQLEditor,
+);
+```
 
 ## 📄 License
 
@@ -105,12 +129,6 @@ Licensed under the Apache License, Version 2.0. See [LICENSE](https://github.com
 
 ## 🔗 Links
 
-- [Apache Superset](https://superset.apache.org/)
-- [Documentation](https://superset.apache.org/docs/)
 - [Community](https://superset.apache.org/community/)
 - [GitHub Repository](https://github.com/apache/superset)
-- [Extension Development Guide](https://superset.apache.org/docs/extensions/)
-
----
-
-**Note**: This package is currently in release candidate status. APIs may change before the 1.0.0 release. Please check the [changelog](CHANGELOG.md) for breaking changes between versions.
+- [Extensions Documentation](https://superset.apache.org/developer-docs/extensions/overview)
diff --git a/superset-frontend/packages/superset-core/package.json b/superset-frontend/packages/superset-core/package.json
index c6cae725228..d95b5bea6ec 100644
--- a/superset-frontend/packages/superset-core/package.json
+++ b/superset-frontend/packages/superset-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@apache-superset/core",
-  "version": "0.0.1-rc11",
+  "version": "0.1.0-rc1",
   "description": "This package contains UI elements, APIs, and utility functions used by Superset.",
   "sideEffects": false,
   "main": "lib/index.js",