diff --git a/packages/core/src/Decoration.ts b/packages/core/src/Decoration.ts
new file mode 100644
index 0000000000..6190f83fef
--- /dev/null
+++ b/packages/core/src/Decoration.ts
@@ -0,0 +1,557 @@
+import { Plugin, Transaction } from '@tiptap/pm/state'
+
+import { Editor } from './Editor.js'
+import { getExtensionField } from './helpers/getExtensionField.js'
+import { DecorationConfig } from './index.js'
+import { InputRule } from './InputRule.js'
+import { Mark } from './Mark.js'
+import { Node } from './Node.js'
+import { PasteRule } from './PasteRule.js'
+import {
+  AnyConfig,
+  Extensions,
+  GlobalAttributes,
+  KeyboardShortcutCommand,
+  ParentConfig,
+  RawCommands,
+} from './types.js'
+import { callOrReturn } from './utilities/callOrReturn.js'
+import { mergeDeep } from './utilities/mergeDeep.js'
+
+declare module '@tiptap/core' {
+  interface DecorationConfig<Options = any, Storage = any, Attrs = any, Spec = any> {
+    // @ts-ignore - this is a dynamic key
+    [key: string]: any;
+
+    /**
+     * The extension name - this must be unique.
+     * It will be used to identify the extension.
+     *
+     * @example 'myDecoration'
+     */
+    name: string;
+
+    /**
+     * The priority of your extension. The higher, the earlier it will be called
+     * and will take precedence over other extensions with a lower priority.
+     * @default 100
+     * @example 101
+     */
+    priority?: number;
+
+    /**
+     * The default options for this extension.
+     * @example
+     * defaultOptions: {
+     *   myOption: 'foo',
+     *   myOtherOption: 10,
+     * }
+     */
+    defaultOptions?: Options;
+
+    /**
+     * This method will add options to this extension
+     * @see https://tiptap.dev/docs/editor/guide/custom-extensions#settings
+     * @example
+     * addOptions() {
+     *  return {
+     *    myOption: 'foo',
+     *    myOtherOption: 10,
+     * }
+     */
+    addOptions?: (this: {
+      name: string;
+      parent: Exclude<ParentConfig<DecorationConfig<Options, Storage>>['addOptions'], undefined>;
+    }) => Options;
+
+    /**
+     * The default storage this extension can save data to.
+     * @see https://tiptap.dev/docs/editor/guide/custom-extensions#storage
+     * @example
+     * defaultStorage: {
+     *   prefetchedUsers: [],
+     *   loading: false,
+     * }
+     */
+    addStorage?: (this: {
+      name: string;
+      options: Options;
+      parent: Exclude<ParentConfig<DecorationConfig<Options, Storage>>['addStorage'], undefined>;
+    }) => Storage;
+
+    /**
+     * This function adds globalAttributes to specific nodes.
+     * @see https://tiptap.dev/docs/editor/guide/custom-extensions#global-attributes
+     * @example
+     * addGlobalAttributes() {
+     *   return [
+     *     {
+             // Extend the following extensions
+     *       types: [
+     *         'heading',
+     *         'paragraph',
+     *       ],
+     *       // … with those attributes
+     *       attributes: {
+     *         textAlign: {
+     *           default: 'left',
+     *           renderHTML: attributes => ({
+     *             style: `text-align: ${attributes.textAlign}`,
+     *           }),
+     *           parseHTML: element => element.style.textAlign || 'left',
+     *         },
+     *       },
+     *     },
+     *   ]
+     * }
+     */
+    addGlobalAttributes?: (this: {
+      name: string;
+      options: Options;
+      storage: Storage;
+      extensions: (Node | Mark)[];
+      parent: ParentConfig<DecorationConfig<Options, Storage>>['addGlobalAttributes'];
+    }) => GlobalAttributes;
+
+    /**
+     * This function adds commands to the editor
+     * @see https://tiptap.dev/docs/editor/guide/custom-extensions#commands
+     * @example
+     * addCommands() {
+     *   return {
+     *     myCommand: () => ({ chain }) => chain().setMark('type', 'foo').run(),
+     *   }
+     * }
+     */
+    addCommands?: (this: {
+      name: string;
+      options: Options;
+      storage: Storage;
+      editor: Editor;
+      parent: ParentConfig<DecorationConfig<Options, Storage>>['addCommands'];
+    }) => Partial<RawCommands>;
+
+    /**
+     * This function registers keyboard shortcuts.
+     * @see https://tiptap.dev/docs/editor/guide/custom-extensions#keyboard-shortcuts
+     * @example
+     * addKeyboardShortcuts() {
+     *   return {
+     *     'Mod-l': () => this.editor.commands.toggleBulletList(),
+     *   }
+     * },
+     */
+    addKeyboardShortcuts?: (this: {
+      name: string;
+      options: Options;
+      storage: Storage;
+      editor: Editor;
+      parent: ParentConfig<DecorationConfig<Options, Storage>>['addKeyboardShortcuts'];
+    }) => {
+      [key: string]: KeyboardShortcutCommand;
+    };
+
+    /**
+     * This function adds input rules to the editor.
+     * @see https://tiptap.dev/docs/editor/guide/custom-extensions#input-rules
+     * @example
+     * addInputRules() {
+     *   return [
+     *     markInputRule({
+     *       find: inputRegex,
+     *       type: this.type,
+     *     }),
+     *   ]
+     * },
+     */
+    addInputRules?: (this: {
+      name: string;
+      options: Options;
+      storage: Storage;
+      editor: Editor;
+      parent: ParentConfig<DecorationConfig<Options, Storage>>['addInputRules'];
+    }) => InputRule[];
+
+    /**
+     * This function adds paste rules to the editor.
+     * @see https://tiptap.dev/docs/editor/guide/custom-extensions#paste-rules
+     * @example
+     * addPasteRules() {
+     *   return [
+     *     markPasteRule({
+     *       find: pasteRegex,
+     *       type: this.type,
+     *     }),
+     *   ]
+     * },
+     */
+    addPasteRules?: (this: {
+      name: string;
+      options: Options;
+      storage: Storage;
+      editor: Editor;
+      parent: ParentConfig<DecorationConfig<Options, Storage>>['addPasteRules'];
+    }) => PasteRule[];
+
+    /**
+     * This function adds Prosemirror plugins to the editor
+     * @see https://tiptap.dev/docs/editor/guide/custom-extensions#prosemirror-plugins
+     * @example
+     * addProseMirrorPlugins() {
+     *   return [
+     *     customPlugin(),
+     *   ]
+     * }
+     */
+    addProseMirrorPlugins?: (this: {
+      name: string;
+      options: Options;
+      storage: Storage;
+      editor: Editor;
+      parent: ParentConfig<DecorationConfig<Options, Storage>>['addProseMirrorPlugins'];
+    }) => Plugin[];
+
+    /**
+     * This function adds additional extensions to the editor. This is useful for
+     * building extension kits.
+     * @example
+     * addExtensions() {
+     *   return [
+     *     BulletList,
+     *     OrderedList,
+     *     ListItem
+     *   ]
+     * }
+     */
+    addExtensions?: (this: {
+      name: string;
+      options: Options;
+      storage: Storage;
+      parent: ParentConfig<DecorationConfig<Options, Storage>>['addExtensions'];
+    }) => Extensions;
+
+    /**
+     * This function extends the schema of the node.
+     * @example
+     * extendNodeSchema() {
+     *   return {
+     *     group: 'inline',
+     *     selectable: false,
+     *   }
+     * }
+     */
+    extendNodeSchema?:
+      | ((
+          this: {
+            name: string;
+            options: Options;
+            storage: Storage;
+            parent: ParentConfig<DecorationConfig<Options, Storage>>['extendNodeSchema'];
+          },
+          extension: Node
+        ) => Record<string, any>)
+      | null;
+
+    /**
+     * This function extends the schema of the mark.
+     * @example
+     * extendMarkSchema() {
+     *   return {
+     *     group: 'inline',
+     *     selectable: false,
+     *   }
+     * }
+     */
+    extendMarkSchema?:
+      | ((
+          this: {
+            name: string;
+            options: Options;
+            storage: Storage;
+            parent: ParentConfig<DecorationConfig<Options, Storage>>['extendMarkSchema'];
+          },
+          extension: Mark
+        ) => Record<string, any>)
+      | null;
+
+    /**
+     * This function extends the schema of the decoration.
+     * @example
+     * extendMarkSchema() {
+     *   return {
+     *     group: 'inline',
+     *     selectable: false,
+     *   }
+     * }
+     */
+    extendDecorationSchema?:
+      | ((
+          this: {
+            name: string;
+            options: Options;
+            storage: Storage;
+            parent: ParentConfig<DecorationConfig<Options, Storage>>['extendDecorationSchema'];
+          },
+          extension: Decoration
+        ) => Record<string, any>)
+      | null;
+
+    /**
+     * The editor is not ready yet.
+     */
+    onBeforeCreate?:
+      | ((this: {
+          name: string;
+          options: Options;
+          storage: Storage;
+          editor: Editor;
+          parent: ParentConfig<DecorationConfig<Options, Storage>>['onBeforeCreate'];
+        }) => void)
+      | null;
+
+    /**
+     * The editor is ready.
+     */
+    onCreate?:
+      | ((this: {
+          name: string;
+          options: Options;
+          storage: Storage;
+          editor: Editor;
+          parent: ParentConfig<DecorationConfig<Options, Storage>>['onCreate'];
+        }) => void)
+      | null;
+
+    /**
+     * The content has changed.
+     */
+    onUpdate?:
+      | ((this: {
+          name: string;
+          options: Options;
+          storage: Storage;
+          editor: Editor;
+          parent: ParentConfig<DecorationConfig<Options, Storage>>['onUpdate'];
+        }) => void)
+      | null;
+
+    /**
+     * The selection has changed.
+     */
+    onSelectionUpdate?:
+      | ((this: {
+          name: string;
+          options: Options;
+          storage: Storage;
+          editor: Editor;
+          parent: ParentConfig<DecorationConfig<Options, Storage>>['onSelectionUpdate'];
+        }) => void)
+      | null;
+
+    /**
+     * The editor state has changed.
+     */
+    onTransaction?:
+      | ((
+          this: {
+            name: string;
+            options: Options;
+            storage: Storage;
+            editor: Editor;
+            parent: ParentConfig<DecorationConfig<Options, Storage>>['onTransaction'];
+          },
+          props: {
+            editor: Editor;
+            transaction: Transaction;
+          }
+        ) => void)
+      | null;
+
+    /**
+     * The editor is focused.
+     */
+    onFocus?:
+      | ((
+          this: {
+            name: string;
+            options: Options;
+            storage: Storage;
+            editor: Editor;
+            parent: ParentConfig<DecorationConfig<Options, Storage>>['onFocus'];
+          },
+          props: {
+            event: FocusEvent;
+          }
+        ) => void)
+      | null;
+
+    /**
+     * The editor isn’t focused anymore.
+     */
+    onBlur?:
+      | ((
+          this: {
+            name: string;
+            options: Options;
+            storage: Storage;
+            editor: Editor;
+            parent: ParentConfig<DecorationConfig<Options, Storage>>['onBlur'];
+          },
+          props: {
+            event: FocusEvent;
+          }
+        ) => void)
+      | null;
+
+    /**
+     * The editor is destroyed.
+     */
+    onDestroy?:
+      | ((this: {
+          name: string;
+          options: Options;
+          storage: Storage;
+          editor: Editor;
+          parent: ParentConfig<DecorationConfig<Options, Storage>>['onDestroy'];
+        }) => void)
+      | null;
+
+    /**
+     * Add attributes to the node
+     * @example addAttributes: () => ({ class: 'foo' })
+     */
+    addAttributes?: (this: {
+      name: string;
+      options: Options;
+      storage: Storage;
+      parent: ParentConfig<DecorationConfig<Options, Storage>>['addAttributes'];
+      editor?: Editor;
+    }) => Partial<Attrs>;
+
+    /**
+     * Add attributes to the node
+     * @example addSpec: () => ({ ctx: 'foo' })
+     */
+    addSpec?: (this: {
+      name: string;
+      options: Options;
+      storage: Storage;
+      parent: ParentConfig<DecorationConfig<Options, Storage>>['addAttributes'];
+      editor?: Editor;
+    }) => Partial<Spec>;
+  }
+}
+
+/**
+ * The Extension class is the base class for all extensions.
+ * @see https://tiptap.dev/api/extensions#create-a-new-extension
+ */
+export class Decoration<Options = any, Storage = any, Attrs = any, Spec = any> {
+  type = 'decoration'
+
+  name = 'decoration'
+
+  parent: Decoration | null = null
+
+  child: Decoration | null = null
+
+  options: Options
+
+  storage: Storage
+
+  config: DecorationConfig = {
+    name: this.name,
+    defaultOptions: {},
+  }
+
+  constructor(config: Partial<DecorationConfig<Options, Storage, Attrs, Spec>> = {}) {
+    this.config = {
+      ...this.config,
+      ...config,
+    }
+
+    this.name = this.config.name
+
+    if (config.defaultOptions && Object.keys(config.defaultOptions).length > 0) {
+      console.warn(
+        `[tiptap warn]: BREAKING CHANGE: "defaultOptions" is deprecated. Please use "addOptions" instead. Found in extension: "${this.name}".`,
+      )
+    }
+
+    // TODO: remove `addOptions` fallback
+    this.options = this.config.defaultOptions
+
+    if (this.config.addOptions) {
+      this.options = callOrReturn(
+        getExtensionField<AnyConfig['addOptions']>(this, 'addOptions', {
+          name: this.name,
+        }),
+      )
+    }
+
+    this.storage = callOrReturn(
+      getExtensionField<AnyConfig['addStorage']>(this, 'addStorage', {
+        name: this.name,
+        options: this.options,
+      }),
+    ) || {}
+  }
+
+  static create<TOptions = any, TStorage = any, TAttrs = any, TSpec = any>(config: Partial<DecorationConfig<TOptions, TStorage, TAttrs, TSpec>> = {}) {
+    return new Decoration<TOptions, TStorage, TAttrs, TSpec>(config)
+  }
+
+  configure(options: Partial<Options> = {}) {
+    // return a new instance so we can use the same extension
+    // with different calls of `configure`
+    const extension = this.extend<Options, Storage, Attrs, Spec>({
+      ...this.config,
+      addOptions: () => {
+        return mergeDeep(this.options as Record<string, any>, options) as Options
+      },
+    })
+
+    // Always preserve the current name
+    extension.name = this.name
+    // Set the parent to be our parent
+    extension.parent = this.parent
+
+    return extension
+  }
+
+  extend<ExtendedOptions = Options, ExtendedStorage = Storage, ExtendedAttrs = Attrs, ExtendSpec = Spec>(
+    extendedConfig: Partial<DecorationConfig<ExtendedOptions, ExtendedStorage, ExtendedAttrs, ExtendSpec>> = {},
+  ) {
+    const extension = new Decoration<ExtendedOptions, ExtendedStorage, ExtendedAttrs, ExtendSpec>({
+      ...this.config,
+      ...extendedConfig,
+    })
+
+    extension.parent = this
+
+    this.child = extension
+
+    extension.name = extendedConfig.name ? extendedConfig.name : extension.parent.name
+
+    if (extendedConfig.defaultOptions && Object.keys(extendedConfig.defaultOptions).length > 0) {
+      console.warn(
+        `[tiptap warn]: BREAKING CHANGE: "defaultOptions" is deprecated. Please use "addOptions" instead. Found in extension: "${extension.name}".`,
+      )
+    }
+
+    extension.options = callOrReturn(
+      getExtensionField<AnyConfig['addOptions']>(extension, 'addOptions', {
+        name: extension.name,
+      }),
+    )
+
+    extension.storage = callOrReturn(
+      getExtensionField<AnyConfig['addStorage']>(extension, 'addStorage', {
+        name: extension.name,
+        options: extension.options,
+      }),
+    )
+
+    return extension
+  }
+}
diff --git a/packages/core/src/DecorationManager.ts b/packages/core/src/DecorationManager.ts
new file mode 100644
index 0000000000..f3af54f088
--- /dev/null
+++ b/packages/core/src/DecorationManager.ts
@@ -0,0 +1,156 @@
+import { Node } from '@tiptap/pm/model'
+import { Plugin, PluginKey, Selection } from '@tiptap/pm/state'
+import { DecorationSet, DecorationSource } from '@tiptap/pm/view'
+
+import { Editor } from './Editor.js'
+import { NodePos } from './NodePos.js'
+import { Range } from './types.js'
+
+type AttachToOptions = {
+  /**
+   * Force the decoration to be a specific type.
+   */
+  type?: 'node' | 'inline' | 'widget';
+  /**
+   * Offset the target position by a number or an object with start and end properties.
+   */
+  offset?:
+    | number
+    | {
+        start: number;
+        end: number;
+      };
+};
+
+type ResolvedDecorationOptions = {
+  type: 'widget' | 'inline' | 'node';
+  from: number;
+  to: number;
+};
+
+type DecorationManagerPluginState = {};
+const pluginKey = new PluginKey<DecorationManagerPluginState>('tiptapDecorationManager')
+
+export class DecorationManager {
+  editor: Editor
+
+  decorations: DecorationSource
+
+  constructor(props: { editor: Editor }) {
+    this.editor = props.editor
+    this.decorations = DecorationSet.empty
+  }
+
+  private resolvePositionsAndType(
+    target: Node | NodePos | Range | Selection | number,
+    options?: Pick<AttachToOptions, 'offset' | 'type'>,
+  ): ResolvedDecorationOptions {
+    let offsetFrom = 0
+    let offsetTo = 0
+
+    if (options?.offset) {
+      if (typeof options.offset === 'number') {
+        offsetFrom = options.offset
+        offsetTo = options.offset
+      } else {
+        offsetFrom = options.offset.start
+        offsetTo = options.offset.end
+      }
+    }
+
+    if (typeof target === 'number') {
+      return {
+        type: options?.type ?? 'widget',
+        from: target + offsetFrom,
+        to: target + offsetTo,
+      }
+    }
+
+    if (target instanceof Selection) {
+      return {
+        type: options?.type ?? 'inline',
+        from: target.from + offsetFrom,
+        to: target.to + offsetFrom,
+      }
+    }
+
+    if (target instanceof NodePos) {
+      return {
+        type: options?.type ?? (offsetFrom !== 0 || offsetTo !== 0 ? 'inline' : 'node'),
+        from: target.pos + offsetFrom,
+        to: target.pos + target.node.nodeSize + offsetTo,
+      }
+    }
+
+    if ('from' in target && 'to' in target) {
+      return {
+        type: options?.type ?? 'inline',
+        from: target.from + offsetFrom,
+        to: target.to + offsetTo,
+      }
+    }
+
+    if (target instanceof Node) {
+      // This may be too expensive for large documents, but it’s the only way to find the correct position
+      let from = -1
+      let to = -1
+
+      // Perhaps we can find the node faster than doing a full traversal
+      this.editor.state.doc.descendants((node, pos) => {
+        if (from !== -1 && to !== -1) {
+          return false
+        }
+        if (node === target) {
+          from = pos
+          to = pos + node.nodeSize
+        }
+      })
+
+      if (from === -1 || to === -1) {
+        throw new Error('Node not found', { cause: target })
+      }
+
+      return {
+        // a node can’t have an offset, so we need to convert it to an inline decoration
+        type: options?.type ?? (offsetFrom !== 0 || offsetTo !== 0 ? 'inline' : 'node'),
+        from,
+        to,
+      }
+    }
+
+    throw new Error(`Invalid target: ${target}`, { cause: target })
+  }
+
+  attachTo(targetNode: Node, options?: AttachToOptions): void;
+  attachTo(targetNode: NodePos, options?: AttachToOptions): void;
+  attachTo(range: Range, options?: AttachToOptions): void;
+  attachTo(selection: Selection, options?: AttachToOptions): void;
+  attachTo(pos: number, options?: AttachToOptions): void;
+  attachTo(target: Node | NodePos | Range | Selection | number, options?: AttachToOptions): void {
+    this.resolvePositionsAndType(target, options)
+  }
+
+  static get pluginKey() {
+    return pluginKey
+  }
+
+  getPlugin() {
+    return new Plugin<DecorationManagerPluginState>({
+      key: DecorationManager.pluginKey,
+      state: {
+        init(config, instance) {
+          return {}
+        },
+        apply(tr, value, oldState, newState) {
+          return {}
+        },
+      },
+      props: {
+        decorations(state) {
+
+        },
+      },
+
+    })
+  }
+}
diff --git a/packages/core/src/index.ts b/packages/core/src/index.ts
index ccfa709259..b03d347960 100644
--- a/packages/core/src/index.ts
+++ b/packages/core/src/index.ts
@@ -21,6 +21,9 @@ export interface Commands<ReturnType = any> {}
 // eslint-disable-next-line
 export interface ExtensionConfig<Options = any, Storage = any> {}
 
+// eslint-disable-next-line
+export interface DecorationConfig<Options = any, Storage = any> {}
+
 // eslint-disable-next-line
 export interface NodeConfig<Options = any, Storage = any> {}
 
diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
index 23ae741a45..d33c043290 100644
--- a/packages/core/src/types.ts
+++ b/packages/core/src/types.ts
@@ -7,7 +7,7 @@ import {
 import { EditorState, Transaction } from '@tiptap/pm/state'
 import { Mappable } from '@tiptap/pm/transform'
 import {
-  Decoration,
+  Decoration as PMDecoration,
   DecorationAttrs,
   EditorProps,
   EditorView,
@@ -15,16 +15,17 @@ import {
   NodeViewConstructor,
 } from '@tiptap/pm/view'
 
+import { Decoration } from './Decoration.js'
 import { Editor } from './Editor.js'
 import { Extension } from './Extension.js'
 import {
-  Commands, ExtensionConfig, MarkConfig, NodeConfig,
+  Commands, DecorationConfig, ExtensionConfig, MarkConfig, NodeConfig,
 } from './index.js'
 import { Mark } from './Mark.js'
 import { Node } from './Node.js'
 
-export type AnyConfig = ExtensionConfig | NodeConfig | MarkConfig;
-export type AnyExtension = Extension | Node | Mark;
+export type AnyConfig = ExtensionConfig | NodeConfig | MarkConfig | DecorationConfig;
+export type AnyExtension = Extension | Node | Mark | Decoration;
 export type Extensions = AnyExtension[];
 
 export type ParentConfig<T> = Partial<{
@@ -233,8 +234,8 @@ export type DOMNode = InstanceType<typeof window.Node>
  */
 export interface DecorationType {
   spec: any
-  map(mapping: Mappable, span: Decoration, offset: number, oldOffset: number): Decoration | null
-  valid(node: Node, span: Decoration): boolean
+  map(mapping: Mappable, span: PMDecoration, offset: number, oldOffset: number): PMDecoration | null
+  valid(node: Node, span: PMDecoration): boolean
   eq(other: DecorationType): boolean
   destroy(dom: DOMNode): void
   readonly attrs: DecorationAttrs
@@ -244,7 +245,7 @@ export interface DecorationType {
  * prosemirror-view does not export the `type` property of `Decoration`.
  * This adds the `type` property to the `Decoration` type.
  */
-export type DecorationWithType = Decoration & {
+export type DecorationWithType = PMDecoration & {
   type: DecorationType;
 };