diff --git a/README.md b/README.md
index ef8d3b1..52c49c3 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,8 @@ npm i -S @nextcloud/sharing
 
 ## Usage
 
-There are two entry points provided:
+There are three entry points provided:
 
 - The main entry point `@nextcloud/sharing` provides general utils for file sharing
 - The _public_ entry point `@nextcloud/sharing/public` provides utils for handling public file shares
+- The _ui_ entry point `@nextcloud/sharing/ui` provides API bindings to interact with the files sharing interface in the files app.
diff --git a/REUSE.toml b/REUSE.toml
index f374a26..b3e6a8f 100644
--- a/REUSE.toml
+++ b/REUSE.toml
@@ -6,7 +6,7 @@ SPDX-PackageSupplier = "Nextcloud GmbH <https://nextcloud.com/impressum/>"
 SPDX-PackageDownloadLocation = "https://github.com/nextcloud-libraries/nextcloud-sharing"
 
 [[annotations]]
-path = ["package.json", "package-lock.json", "tsconfig.json"]
+path = ["package.json", "package-lock.json", "**/tsconfig.json"]
 precedence = "aggregate"
 SPDX-FileCopyrightText = "2021 Nextcloud GmbH and Nextcloud contributors"
 SPDX-License-Identifier = "GPL-3.0-or-later"
diff --git a/lib/index.ts b/lib/index.ts
index 930a2b9..c9f35ca 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -3,46 +3,5 @@
  * SPDX-License-Identifier: GPL-3.0-or-later
  */
 
-/** @deprecated will be removed with the next version use `ShareType` instead */
-export enum Type {
-	SHARE_TYPE_USER = 0,
-	SHARE_TYPE_GROUP = 1,
-	SHARE_TYPE_LINK = 3,
-	SHARE_TYPE_EMAIL = 4,
-	SHARE_TYPE_REMOTE = 6,
-	SHARE_TYPE_CIRCLE = 7,
-	SHARE_TYPE_GUEST = 8,
-	SHARE_TYPE_REMOTE_GROUP = 9,
-	SHARE_TYPE_ROOM = 10,
-	SHARE_TYPE_DECK = 12,
-	/**
-	 * @since 26.0.0
-	 */
-	SHARE_TYPE_FEDERATED_GROUP = 14,
-}
-
-export enum ShareType {
-	User = 0,
-	Group = 1,
-	Link = 3,
-	Email = 4,
-	Remote = 6,
-	/**
-	 * Was called `Circle` before Nextcloud 29
-	 */
-	Team = 7,
-	Guest = 8,
-	RemoteGroup = 9,
-	Room = 10,
-	Deck = 12,
-	/**
-	 * @since 26.0.0
-	 */
-	FederatedGroup = 14,
-	/**
-	 * Third party share types
-	 *
-	 * @since 25.0.0
-	 */
-	ScienceMesh = 15,
-}
+export type * from './share/index.ts'
+export { ShareType } from './share/index.ts'
diff --git a/lib/share/Share.ts b/lib/share/Share.ts
new file mode 100644
index 0000000..67b6ab1
--- /dev/null
+++ b/lib/share/Share.ts
@@ -0,0 +1,158 @@
+/*!
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import type { ShareType } from './ShareType.ts'
+
+export type ShareAttribute = {
+	value: boolean
+	key: string
+	scope: string
+}
+
+export interface IGenericShare {
+	/**
+	 * The share id
+	 */
+	id: number
+
+	/**
+	 * The share type
+	 */
+	type: ShareType
+
+	/**
+	 * The generic share attributes
+	 */
+	attributes: ShareAttribute[]
+
+	/**
+	 * The share creation timestamp (in seconds since UNIX epoch)
+	 */
+	createdTime: number
+
+	/**
+	 * The share permissions for the share receiver.
+	 *
+	 * A bitmask of the share permissions like `SharePermission.Read | SharePermission.Write`.
+	 * These are not the permissions for the current user but for the share recipient (shareWith).
+	 */
+	permissions: number
+
+	/**
+	 * Whether the current user can edit this share.
+	 * Only relevant for existing shares.
+	 */
+	readonly canEdit: boolean
+
+	/**
+	 * Whether the current user can delete this share.
+	 * Only relevant for existing shares.
+	 */
+	readonly canDelete: boolean
+
+	/**
+	 * The uid of the share owner
+	 */
+	owner: string
+
+	/**
+	 * The displayname of the share owner
+	 */
+	ownerDisplayname: string
+
+	/**
+	 * Get the share with entity id
+	 */
+	shareWith: string
+
+	/**
+	 * The displayname of the entity this was shared with
+	 */
+	shareWithDisplayname: string
+
+	/**
+	 * In case of multiple shares with the same entity this is the unique displayname.
+	 */
+	shareWithDisplaynameUnique: string
+
+	/**
+	 * The uid of the owner of the shared file or folder.
+	 */
+	fileOwner: string
+
+	/**
+	 * The displayname of the owner of the shared file or folder.
+	 */
+	fileOwnerDisplayname: string
+
+	/**
+	 * Hide the download functionalities for the shared nodes.
+	 * This obfuscates the download buttons for such shares.
+	 */
+	hideDownload: boolean
+
+	/**
+	 * Have a mail been sent to the share recipient
+	 */
+	mailSend: boolean
+
+	/**
+	 * The share note
+	 */
+	note?: string
+
+	/**
+	 * The share label
+	 */
+	label?: string
+
+	/**
+	 * The share expiration date in "YYYY-MM-DD HH:mm" format
+	 */
+	expireDate?: `${number}-${number}-${number} ${number}:${number}`
+}
+
+export interface ILinkShare extends IGenericShare {
+	/**
+	 * @inheritdoc
+	 */
+	type: ShareType.Link | ShareType.Email
+
+	/**
+	 * The share token
+	 */
+	token: string
+
+	/**
+	 * The share password
+	 */
+	password: string
+
+	/**
+	 * Password expiration time as "YYYY-MM-DD HH:mm" format
+	 */
+	passwordExpirationTime: `${number}-${number}-${number} ${number}:${number}`
+
+	/**
+	 * Password should be sent to recipient using Nextcloud Talk
+	 */
+	sendPasswordByTalk: boolean
+}
+
+export interface IRemoteShare extends IGenericShare {
+	/**
+	 * @inheritdoc
+	 */
+	type: ShareType.Remote | ShareType.RemoteGroup
+
+	/**
+	 * Is the share from a trusted remote server
+	 */
+	isTrustedServer: boolean
+}
+
+export type IInternalShare = IGenericShare
+
+export type IShare = ILinkShare | IInternalShare | IRemoteShare
diff --git a/lib/share/ShareType.ts b/lib/share/ShareType.ts
new file mode 100644
index 0000000..c67096a
--- /dev/null
+++ b/lib/share/ShareType.ts
@@ -0,0 +1,30 @@
+/*!
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+export enum ShareType {
+	User = 0,
+	Group = 1,
+	Link = 3,
+	Email = 4,
+	Remote = 6,
+	/**
+	 * Was called `Circle` before Nextcloud 29
+	 */
+	Team = 7,
+	Guest = 8,
+	RemoteGroup = 9,
+	Room = 10,
+	Deck = 12,
+	/**
+	 * @since 26.0.0
+	 */
+	FederatedGroup = 14,
+	/**
+	 * Third party share types
+	 *
+	 * @since 25.0.0
+	 */
+	ScienceMesh = 15,
+}
diff --git a/lib/share/index.ts b/lib/share/index.ts
new file mode 100644
index 0000000..ae60ae1
--- /dev/null
+++ b/lib/share/index.ts
@@ -0,0 +1,8 @@
+/*!
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+export type * from './Share.ts'
+
+export { ShareType } from './ShareType.ts'
diff --git a/lib/ui/index.ts b/lib/ui/index.ts
new file mode 100644
index 0000000..0d361d6
--- /dev/null
+++ b/lib/ui/index.ts
@@ -0,0 +1,10 @@
+/*!
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+export type * from './sidebar-action.ts'
+export type * from './sidebar-section.ts'
+
+export * from './sidebar-action.ts'
+export * from './sidebar-section.ts'
diff --git a/lib/ui/sidebar-action.ts b/lib/ui/sidebar-action.ts
new file mode 100644
index 0000000..d718e37
--- /dev/null
+++ b/lib/ui/sidebar-action.ts
@@ -0,0 +1,158 @@
+/*!
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import type { INode } from '@nextcloud/files'
+import type { IShare } from '../index.ts'
+
+import isSvg from 'is-svg'
+
+export interface ISidebarAction {
+	/**
+	 * Unique identifier for the action
+	 */
+	id: string
+
+	/**
+	 * The registered identifier of the custom web component to be used.
+	 *
+	 * The custom elements identifier must be prefixed with your apps namespace like `oca_myapp-sharing_action`.
+	 * Also the component must implement following properties:
+	 * - `node`: The shared node as `INode` from `@nextcloud/files`.
+	 * - `share`: The share model if the share already exists as object of type `IShare` (potentially undefined).
+	 * - `onSave`: A registration method to register a on-save callback which will be called when the share is saved `(callback: () => Promise<void>) => void`
+	 *
+	 * @see https://developer.mozilla.org/en-US/docs/Web/API/Web_components
+	 * @see https://vuejs.org/guide/extras/web-components#building-custom-elements-with-vue
+	 */
+	element: string
+
+	/**
+	 * Order of the sidebar actions.
+	 * A higher value means the action will be displayed first.
+	 */
+	order: number
+
+	/**
+	 * Check if the action is enabled for a specific share type
+	 *
+	 * @param share - The share
+	 * @param node - The node that share is about
+	 */
+	enabled(share: IShare, node: INode): boolean
+}
+
+export interface ISidebarInlineAction {
+	/**
+	 * Unique identifier for the action
+	 */
+	id: string
+
+	/**
+	 * Check if the action is enabled for a specific share type
+	 *
+	 * @param share - The share
+	 * @param node - The node that share is about
+	 */
+	enabled(share: IShare, node: INode): boolean
+
+	/**
+	 * The callback handler when the user selected this action.
+	 *
+	 * @param share - The share
+	 * @param node - The shared node
+	 */
+	exec(share: IShare, node: INode): void | Promise<void>
+
+	/**
+	 * The inline svg icon to use.
+	 */
+	iconSvg: string
+
+	/**
+	 * The localized label of this action
+	 *
+	 * @param share - The current share (might not be created yet)
+	 * @param node - The shared node
+	 */
+	label(share: IShare, node: INode): string
+
+	/**
+	 * Order of the sidebar actions.
+	 * A higher value means the action will be displayed first.
+	 */
+	order: number
+}
+
+/**
+ * Register a new sidebar action
+ *
+ * @param action - The action to register
+ */
+export function registerSidebarAction(action: ISidebarAction): void {
+	if (!action.id) {
+		throw new Error('Sidebar actions must have an id')
+	}
+	if (!action.element || !action.element.startsWith('oca_') || !window.customElements.get(action.element)) {
+		throw new Error('Sidebar actions must provide a registered custom web component identifier')
+	}
+	if (typeof action.order !== 'number') {
+		throw new Error('Sidebar actions must have the order property')
+	}
+	if (typeof action.enabled !== 'function') {
+		throw new Error('Sidebar actions must implement the "enabled" method')
+	}
+	window._nc_files_sharing_sidebar_actions ??= new Map<string, ISidebarAction>()
+
+	if (window._nc_files_sharing_sidebar_actions.has(action.id)) {
+		throw new Error(`Sidebar action with id "${action.id}" is already registered`)
+	}
+	window._nc_files_sharing_sidebar_actions.set(action.id, action)
+}
+
+/**
+ * Register a new sidebar action
+ *
+ * @param action - The action to register
+ */
+export function registerSidebarInlineAction(action: ISidebarInlineAction): void {
+	if (!action.id) {
+		throw new Error('Sidebar actions must have an id')
+	}
+	if (typeof action.order !== 'number') {
+		throw new Error('Sidebar actions must have the "order" property')
+	}
+	if (typeof action.iconSvg !== 'string' || !isSvg(action.iconSvg)) {
+		throw new Error('Sidebar actions must have the "iconSvg" property')
+	}
+	if (typeof action.label !== 'function') {
+		throw new Error('Sidebar actions must implement the "label" method')
+	}
+	if (typeof action.exec !== 'function') {
+		throw new Error('Sidebar actions must implement the "exec" method')
+	}
+	if (typeof action.enabled !== 'function') {
+		throw new Error('Sidebar actions must implement the "enabled" method')
+	}
+	window._nc_files_sharing_sidebar_inline_actions ??= new Map<string, ISidebarInlineAction>()
+
+	if (window._nc_files_sharing_sidebar_inline_actions.has(action.id)) {
+		throw new Error(`Sidebar action with id "${action.id}" is already registered`)
+	}
+	window._nc_files_sharing_sidebar_inline_actions.set(action.id, action)
+}
+
+/**
+ * Get all registered sidebar actions
+ */
+export function getSidebarActions(): ISidebarAction[] {
+	return [...(window._nc_files_sharing_sidebar_actions?.values() ?? [])]
+}
+
+/**
+ * Get all registered sidebar inline actions
+ */
+export function getSidebarInlineActions(): ISidebarInlineAction[] {
+	return [...(window._nc_files_sharing_sidebar_inline_actions?.values() ?? [])]
+}
diff --git a/lib/ui/sidebar-section.ts b/lib/ui/sidebar-section.ts
new file mode 100644
index 0000000..b0599c3
--- /dev/null
+++ b/lib/ui/sidebar-section.ts
@@ -0,0 +1,70 @@
+/*!
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import type { INode } from '@nextcloud/files'
+
+export interface ISidebarSection {
+	/**
+	 * Unique identifier for the section
+	 */
+	id: string
+
+	/**
+	 * The registered identifier of the custom web component to be used.
+	 *
+	 * The custom elements identifier must be prefixed with your apps namespace like `oca_myapp-sharing_section`.
+	 * Also the component must at least have a `node` property which must accept the current active node as `INode` from `@nextcloud/files`.
+	 *
+	 * @see https://developer.mozilla.org/en-US/docs/Web/API/Web_components
+	 * @see https://vuejs.org/guide/extras/web-components#building-custom-elements-with-vue
+	 */
+	element: string
+
+	/**
+	 * Order of the sidebar sections.
+	 * A higher value means the section will be displayed first.
+	 */
+	order: number
+
+	/**
+	 * Check if the section is enabled for the current active node
+	 *
+	 * @param node - The node to check
+	 */
+	enabled(node: INode): boolean
+}
+
+/**
+ * Register a new sidebar section inside the files sharing sidebar tab.
+ *
+ * @param section - The section to register
+ */
+export function registerSidebarSection(section: ISidebarSection): void {
+	if (!section.id) {
+		throw new Error('Sidebar sections must have an id')
+	}
+	if (!section.element || !section.element.startsWith('oca_') || !window.customElements.get(section.element)) {
+		throw new Error('Sidebar sections must provide a registered custom web component identifier')
+	}
+	if (typeof section.order !== 'number') {
+		throw new Error('Sidebar sections must have the order property')
+	}
+	if (typeof section.enabled !== 'function') {
+		throw new Error('Sidebar sections must implement the enabled method')
+	}
+
+	window._nc_files_sharing_sidebar_sections ??= new Map<string, ISidebarSection>()
+	if (window._nc_files_sharing_sidebar_sections.has(section.id)) {
+		throw new Error(`Sidebar section with id "${section.id}" is already registered`)
+	}
+	window._nc_files_sharing_sidebar_sections.set(section.id, section)
+}
+
+/**
+ * Get all registered sidebar sections for the files sharing sidebar tab.
+ */
+export function getSidebarSections(): ISidebarSection[] {
+	return [...(window._nc_files_sharing_sidebar_sections?.values() ?? [])]
+}
diff --git a/lib/window.d.ts b/lib/window.d.ts
new file mode 100644
index 0000000..36955a6
--- /dev/null
+++ b/lib/window.d.ts
@@ -0,0 +1,14 @@
+/*!
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+import type { ISidebarAction, ISidebarInlineAction, ISidebarSection } from './ui/index.ts'
+
+declare global {
+	interface Window {
+		_nc_files_sharing_sidebar_actions?: Map<string, ISidebarAction>
+		_nc_files_sharing_sidebar_inline_actions?: Map<string, ISidebarInlineAction>
+		_nc_files_sharing_sidebar_sections?: Map<string, ISidebarSection>
+	}
+}
diff --git a/package-lock.json b/package-lock.json
index 5bcf898..5cfc277 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,11 +9,12 @@
       "version": "0.2.5",
       "license": "GPL-3.0-or-later",
       "dependencies": {
-        "@nextcloud/initial-state": "^3.0.0"
+        "@nextcloud/initial-state": "^3.0.0",
+        "is-svg": "^6.1.0"
       },
       "devDependencies": {
-        "@nextcloud/browserslist-config": "^3.0.1",
         "@nextcloud/eslint-config": "^9.0.0-rc.5",
+        "@nextcloud/files": "^3.12.0",
         "@types/node": "^24.3.0",
         "@vitest/coverage-v8": "^3.2.4",
         "eslint": "^9.29.0",
@@ -24,6 +25,9 @@
       },
       "engines": {
         "node": "^20.0.0 || ^22.0.0 || ^24.0.0"
+      },
+      "optionalDependencies": {
+        "@nextcloud/files": "^3.12.0"
       }
     },
     "node_modules/@ampproject/remapping": {
@@ -100,6 +104,16 @@
         "node": ">=18"
       }
     },
+    "node_modules/@buttercup/fetch": {
+      "version": "0.2.1",
+      "resolved": "https://registry.npmjs.org/@buttercup/fetch/-/fetch-0.2.1.tgz",
+      "integrity": "sha512-sCgECOx8wiqY8NN1xN22BqqKzXYIG2AicNLlakOAI4f0WgyLVUbAigMf8CZhBtJxdudTcB1gD5lciqi44jwJvg==",
+      "dev": true,
+      "license": "MIT",
+      "optionalDependencies": {
+        "node-fetch": "^3.3.0"
+      }
+    },
     "node_modules/@es-joy/jsdoccomment": {
       "version": "0.52.0",
       "resolved": "https://registry.npmjs.org/@es-joy/jsdoccomment/-/jsdoccomment-0.52.0.tgz",
@@ -778,6 +792,16 @@
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
       }
     },
+    "node_modules/@file-type/xml": {
+      "version": "0.4.4",
+      "resolved": "https://registry.npmjs.org/@file-type/xml/-/xml-0.4.4.tgz",
+      "integrity": "sha512-NhCyXoHlVZ8TqM476hyzwGJ24+D5IPSaZhmrPj7qXnEVb3q6jrFzA3mM9TBpknKSI9EuQeGTKRg2DXGUwvBBoQ==",
+      "license": "MIT",
+      "dependencies": {
+        "sax": "^1.4.1",
+        "strtok3": "^10.3.4"
+      }
+    },
     "node_modules/@gerrit0/mini-shiki": {
       "version": "3.12.0",
       "resolved": "https://registry.npmjs.org/@gerrit0/mini-shiki/-/mini-shiki-3.12.0.tgz",
@@ -949,10 +973,52 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
-    "node_modules/@nextcloud/browserslist-config": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/@nextcloud/browserslist-config/-/browserslist-config-3.0.1.tgz",
-      "integrity": "sha512-GZTxL5fsDgmFoot/qnRurjHCuHjSfOg+A6t4+P2TySXua2Q1Ex0lecZYlSnRuOR/W5BGOZ06ITTA/hbkSh1Ypg==",
+    "node_modules/@nextcloud/auth": {
+      "version": "2.5.2",
+      "resolved": "https://registry.npmjs.org/@nextcloud/auth/-/auth-2.5.2.tgz",
+      "integrity": "sha512-1dr+Xhvg2QtsFC23KFXJSkU524EVgI/+WFBGTZ8tFa+9hmcZ3CqZIHjtXm3KxUvezwAY5023Ml0n2vpdYkpBXQ==",
+      "dev": true,
+      "license": "GPL-3.0-or-later",
+      "dependencies": {
+        "@nextcloud/browser-storage": "^0.4.0",
+        "@nextcloud/event-bus": "^3.3.2"
+      },
+      "engines": {
+        "node": "^20.0.0 || ^22.0.0 || ^24.0.0"
+      }
+    },
+    "node_modules/@nextcloud/browser-storage": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/@nextcloud/browser-storage/-/browser-storage-0.4.0.tgz",
+      "integrity": "sha512-D6XxznxCYmJ3oBCC3p0JB6GZJ2RZ9dgbB1UqtTePXrIvHUMBAeF/YkiGKYxLAVZCZb+NSNZXgAYHm/3LnIUbDg==",
+      "dev": true,
+      "license": "GPL-3.0-or-later",
+      "dependencies": {
+        "core-js": "3.37.0"
+      },
+      "engines": {
+        "node": "^20.0.0",
+        "npm": "^10.0.0"
+      }
+    },
+    "node_modules/@nextcloud/capabilities": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@nextcloud/capabilities/-/capabilities-1.2.0.tgz",
+      "integrity": "sha512-L1NQtOfHWzkfj0Ple1MEJt6HmOHWAi3y4qs+OnwSWexqJT0DtXTVPyRxi7ADyITwRxS5H9R/HMl6USAj4Nr1nQ==",
+      "dev": true,
+      "license": "GPL-3.0-or-later",
+      "dependencies": {
+        "@nextcloud/initial-state": "^2.1.0"
+      },
+      "engines": {
+        "node": "^20.0.0",
+        "npm": "^10.0.0"
+      }
+    },
+    "node_modules/@nextcloud/capabilities/node_modules/@nextcloud/initial-state": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/@nextcloud/initial-state/-/initial-state-2.2.0.tgz",
+      "integrity": "sha512-cDW98L5KGGgpS8pzd+05304/p80cyu8U2xSDQGa+kGPTpUFmCbv2qnO5WrwwGTauyjYijCal2bmw82VddSH+Pg==",
       "dev": true,
       "license": "GPL-3.0-or-later",
       "engines": {
@@ -987,6 +1053,44 @@
         "eslint": ">=9"
       }
     },
+    "node_modules/@nextcloud/event-bus": {
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/@nextcloud/event-bus/-/event-bus-3.3.2.tgz",
+      "integrity": "sha512-1Qfs6i7Tz2qd1A33NpBQOt810ydHIRjhyXMFwSEkYX2yUI80lAk/sWO8HIB2Fqp+iffhyviPPcQYoytMDRyDNw==",
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+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/layerr/-/layerr-3.0.0.tgz",
+      "integrity": "sha512-tv754Ki2dXpPVApOrjTyRo4/QegVb9eVFq4mjqp4+NM5NaX7syQvN5BBNfV/ZpAHCEHV24XdUVrBAoka4jt3pA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/levn": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/levn/-/levn-0.4.1.tgz",
@@ -3611,6 +4007,18 @@
         "markdown-it": "bin/markdown-it.mjs"
       }
     },
+    "node_modules/md5": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/md5/-/md5-2.3.0.tgz",
+      "integrity": "sha512-T1GITYmFaKuO91vxyoQMFETst+O71VUPEU3ze5GNzDm0OWdP8v1ziTaAEPUr/3kLsY3Sftgz242A1SetQiDL7g==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "charenc": "0.0.2",
+        "crypt": "0.0.2",
+        "is-buffer": "~1.1.6"
+      }
+    },
     "node_modules/mdurl": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/mdurl/-/mdurl-2.0.0.tgz",
@@ -3724,6 +4132,13 @@
         "node": ">=18"
       }
     },
+    "node_modules/nested-property": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/nested-property/-/nested-property-4.0.0.tgz",
+      "integrity": "sha512-yFehXNWRs4cM0+dz7QxCd06hTbWbSkV0ISsqBfkntU6TOY4Qm3Q88fRRLOddkGh2Qq6dZvnKVAahfhjcUvLnyA==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/node-addon-api": {
       "version": "7.1.1",
       "resolved": "https://registry.npmjs.org/node-addon-api/-/node-addon-api-7.1.1.tgz",
@@ -3733,6 +4148,46 @@
       "optional": true,
       "peer": true
     },
+    "node_modules/node-domexception": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/node-domexception/-/node-domexception-1.0.0.tgz",
+      "integrity": "sha512-/jKZoMpw0F8GRwl4/eLROPA3cfcXtLApP0QzLmUT/HuPCZWyB7IY9ZrMeKw2O/nFIqPQB3PVM9aYm0F312AXDQ==",
+      "deprecated": "Use your platform's native DOMException instead",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/jimmywarting"
+        },
+        {
+          "type": "github",
+          "url": "https://paypal.me/jimmywarting"
+        }
+      ],
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.5.0"
+      }
+    },
+    "node_modules/node-fetch": {
+      "version": "3.3.2",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-3.3.2.tgz",
+      "integrity": "sha512-dRB78srN/l6gqWulah9SrxeYnxeddIG30+GOqK/9OlLVyLg3HPnr6SqOWTWOXKRwC2eGYCkZ59NNuSgvSrpgOA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "data-uri-to-buffer": "^4.0.0",
+        "fetch-blob": "^3.1.4",
+        "formdata-polyfill": "^4.0.10"
+      },
+      "engines": {
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/node-fetch"
+      }
+    },
     "node_modules/nth-check": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/nth-check/-/nth-check-2.1.1.tgz",
@@ -3853,6 +4308,13 @@
         "node": ">=8"
       }
     },
+    "node_modules/path-posix": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/path-posix/-/path-posix-1.0.0.tgz",
+      "integrity": "sha512-1gJ0WpNIiYcQydgg3Ed8KzvIqTsDpNwq+cjBCssvBtuTWjEqY1AW+i+OepiEMqDCzyro9B2sLAe4RBPajMYFiA==",
+      "dev": true,
+      "license": "ISC"
+    },
     "node_modules/path-scurry": {
       "version": "1.11.1",
       "resolved": "https://registry.npmjs.org/path-scurry/-/path-scurry-1.11.1.tgz",
@@ -3980,6 +4442,13 @@
         "node": ">=6"
       }
     },
+    "node_modules/querystringify": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/querystringify/-/querystringify-2.2.0.tgz",
+      "integrity": "sha512-FIqgj2EUvTa7R50u0rGsyTftzjYmv/a3hO345bZNrqabNqjtgiDMgmo4mkUjd+nzU5oF3dClKqFIPUKybUyqoQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/queue-microtask": {
       "version": "1.2.3",
       "resolved": "https://registry.npmjs.org/queue-microtask/-/queue-microtask-1.2.3.tgz",
@@ -4017,6 +4486,13 @@
         "url": "https://paulmillr.com/funding/"
       }
     },
+    "node_modules/requires-port": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/requires-port/-/requires-port-1.0.0.tgz",
+      "integrity": "sha512-KigOCHcocU3XODJxsu8i/j8T9tzT4adHiecwORRQ0ZZFcp7ahwXuRU1m+yuO90C5ZUyGeGfocHDI14M3L3yDAQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/resolve-from": {
       "version": "4.0.0",
       "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-4.0.0.tgz",
@@ -4132,6 +4608,12 @@
         "@parcel/watcher": "^2.4.1"
       }
     },
+    "node_modules/sax": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/sax/-/sax-1.4.1.tgz",
+      "integrity": "sha512-+aWOz7yVScEGoKNd4PA10LZ8sk0A/z5+nXQG5giUO5rprX9jgYsTdov9qCchZiPIZezbZH+jRut8nPodFAX4Jg==",
+      "license": "ISC"
+    },
     "node_modules/semver": {
       "version": "7.7.2",
       "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.2.tgz",
@@ -4409,6 +4891,22 @@
       ],
       "license": "MIT"
     },
+    "node_modules/strtok3": {
+      "version": "10.3.4",
+      "resolved": "https://registry.npmjs.org/strtok3/-/strtok3-10.3.4.tgz",
+      "integrity": "sha512-KIy5nylvC5le1OdaaoCJ07L+8iQzJHGH6pWDuzS+d07Cu7n1MZ2x26P8ZKIWfbK02+XIL8Mp4RkWeqdUCrDMfg==",
+      "license": "MIT",
+      "dependencies": {
+        "@tokenizer/token": "^0.3.0"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/Borewit"
+      }
+    },
     "node_modules/supports-color": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
@@ -4599,6 +5097,13 @@
         "typescript": ">=4.8.4 <6.0.0"
       }
     },
+    "node_modules/typescript-event-target": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/typescript-event-target/-/typescript-event-target-1.1.1.tgz",
+      "integrity": "sha512-dFSOFBKV6uwaloBCCUhxlD3Pr/P1a/tJdcmPrTXCHlEFD3faj0mztjcGn6VBAhQ0/Bdy8K3VWrrqwbt/ffsYsg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/uc.micro": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/uc.micro/-/uc.micro-2.1.0.tgz",
@@ -4623,6 +5128,27 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/url-join": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/url-join/-/url-join-5.0.0.tgz",
+      "integrity": "sha512-n2huDr9h9yzd6exQVnH/jU5mr+Pfx08LRXXZhkLLetAMESRj+anQsTAh940iMrIetKAmry9coFuZQ2jY8/p3WA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
+      }
+    },
+    "node_modules/url-parse": {
+      "version": "1.5.10",
+      "resolved": "https://registry.npmjs.org/url-parse/-/url-parse-1.5.10.tgz",
+      "integrity": "sha512-WypcfiRhfeUP9vvF0j6rw0J3hrWrw6iZv3+22h6iRMJ/8z1Tj6XfLP4DsUix5MhMPnXpiHDoKyoZ/bdCkwBCiQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "querystringify": "^2.1.1",
+        "requires-port": "^1.0.0"
+      }
+    },
     "node_modules/util-deprecate": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
@@ -4826,6 +5352,87 @@
         "eslint": "^8.57.0 || ^9.0.0"
       }
     },
+    "node_modules/web-streams-polyfill": {
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/web-streams-polyfill/-/web-streams-polyfill-3.3.3.tgz",
+      "integrity": "sha512-d2JWLCivmZYTSIoge9MsgFCZrt571BikcWGYkjC1khllbTeDlGqZ2D8vD8E/lJa8WGWbb7Plm8/XJYV7IJHZZw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">= 8"
+      }
+    },
+    "node_modules/webdav": {
+      "version": "5.8.0",
+      "resolved": "https://registry.npmjs.org/webdav/-/webdav-5.8.0.tgz",
+      "integrity": "sha512-iuFG7NamJ41Oshg4930iQgfIpRrUiatPWIekeznYgEf2EOraTRcDPTjy7gIOMtkdpKTaqPk1E68NO5PAGtJahA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@buttercup/fetch": "^0.2.1",
+        "base-64": "^1.0.0",
+        "byte-length": "^1.0.2",
+        "entities": "^6.0.0",
+        "fast-xml-parser": "^4.5.1",
+        "hot-patcher": "^2.0.1",
+        "layerr": "^3.0.0",
+        "md5": "^2.3.0",
+        "minimatch": "^9.0.5",
+        "nested-property": "^4.0.0",
+        "node-fetch": "^3.3.2",
+        "path-posix": "^1.0.0",
+        "url-join": "^5.0.0",
+        "url-parse": "^1.5.10"
+      },
+      "engines": {
+        "node": ">=14"
+      }
+    },
+    "node_modules/webdav/node_modules/entities": {
+      "version": "6.0.1",
+      "resolved": "https://registry.npmjs.org/entities/-/entities-6.0.1.tgz",
+      "integrity": "sha512-aN97NXWF6AWBTahfVOIrB/NShkzi5H7F9r1s9mD3cDj4Ko5f2qhhVoYMibXF7GlLveb/D2ioWay8lxI97Ven3g==",
+      "dev": true,
+      "license": "BSD-2-Clause",
+      "engines": {
+        "node": ">=0.12"
+      },
+      "funding": {
+        "url": "https://github.com/fb55/entities?sponsor=1"
+      }
+    },
+    "node_modules/webdav/node_modules/fast-xml-parser": {
+      "version": "4.5.3",
+      "resolved": "https://registry.npmjs.org/fast-xml-parser/-/fast-xml-parser-4.5.3.tgz",
+      "integrity": "sha512-RKihhV+SHsIUGXObeVy9AXiBbFwkVk7Syp8XgwN5U3JV416+Gwp/GO9i0JYKmikykgz/UHRrrV4ROuZEo/T0ig==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "strnum": "^1.1.1"
+      },
+      "bin": {
+        "fxparser": "src/cli/cli.js"
+      }
+    },
+    "node_modules/webdav/node_modules/strnum": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/strnum/-/strnum-1.1.2.tgz",
+      "integrity": "sha512-vrN+B7DBIoTTZjnPNewwhx6cBA/H+IS7rfW68n7XxC1y7uoiGQBxaKzqucGUgavX15dJgiGztLJ8vxuEzwqBdA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/whatwg-mimetype": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-3.0.0.tgz",
diff --git a/package.json b/package.json
index 2255a18..897166e 100644
--- a/package.json
+++ b/package.json
@@ -11,11 +11,15 @@
   "exports": {
     ".": {
       "types": "./dist/index.d.ts",
-      "import": "./dist/index.js"
+      "default": "./dist/index.js"
     },
     "./public": {
       "types": "./dist/public.d.ts",
-      "import": "./dist/public.js"
+      "default": "./dist/public.js"
+    },
+    "./ui": {
+      "types": "./dist/ui/index.d.ts",
+      "default": "./dist/ui/index.js"
     }
   },
   "main": "dist/index.js",
@@ -29,7 +33,7 @@
   "scripts": {
     "build": "npm run build:cleanup && npm run build:source",
     "build:cleanup": "tsc --build --clean",
-    "build:doc": "typedoc --out dist/doc lib/index.ts lib/publicShare.ts && touch dist/doc/.nojekyll",
+    "build:doc": "typedoc --out dist/doc lib/index.ts lib/publicShare.ts lib/ui/index.ts && touch dist/doc/.nojekyll",
     "build:source": "tsc",
     "dev": "vite --mode development build",
     "lint": "eslint",
@@ -40,15 +44,13 @@
     "ts:check": "tsc --noEmit",
     "watch": "vite --mode development build --watch"
   },
-  "browserslist": [
-    "extends @nextcloud/browserslist-config"
-  ],
   "dependencies": {
-    "@nextcloud/initial-state": "^3.0.0"
+    "@nextcloud/initial-state": "^3.0.0",
+    "is-svg": "^6.1.0"
   },
   "devDependencies": {
-    "@nextcloud/browserslist-config": "^3.0.1",
     "@nextcloud/eslint-config": "^9.0.0-rc.5",
+    "@nextcloud/files": "^3.12.0",
     "@types/node": "^24.3.0",
     "@vitest/coverage-v8": "^3.2.4",
     "eslint": "^9.29.0",
@@ -57,6 +59,9 @@
     "typescript": "^5.9.2",
     "vitest": "^3.2.4"
   },
+  "optionalDependencies": {
+    "@nextcloud/files": "^3.12.0"
+  },
   "engines": {
     "node": "^20.0.0 || ^22.0.0 || ^24.0.0"
   },
diff --git a/lib/index.spec.ts b/tests/index.spec.ts
similarity index 92%
rename from lib/index.spec.ts
rename to tests/index.spec.ts
index 792128a..6266f22 100644
--- a/lib/index.spec.ts
+++ b/tests/index.spec.ts
@@ -3,7 +3,7 @@
  * SPDX-License-Identifier: CC0-1.0
  */
 import { expect, test } from 'vitest'
-import { ShareType } from '.'
+import { ShareType } from '../lib/index.ts'
 
 test('ShareType', () => {
 	for (const type of Object.values(ShareType)) {
diff --git a/lib/publicShare.spec.ts b/tests/publicShare.spec.ts
similarity index 97%
rename from lib/publicShare.spec.ts
rename to tests/publicShare.spec.ts
index 75e6bfa..edd1573 100644
--- a/lib/publicShare.spec.ts
+++ b/tests/publicShare.spec.ts
@@ -60,7 +60,7 @@ describe('getSharingToken', () => {
 	})
 
 	const getSharingToken = async () => {
-		const { getSharingToken: sharingToken } = await import('./public.ts')
+		const { getSharingToken: sharingToken } = await import('../lib/public.ts')
 		return sharingToken()
 	}
 
diff --git a/tests/tsconfig.json b/tests/tsconfig.json
new file mode 100644
index 0000000..60b965b
--- /dev/null
+++ b/tests/tsconfig.json
@@ -0,0 +1,8 @@
+{
+	"extends": "../tsconfig.json",
+	"include": ["../lib/**/*.ts", "./**/*.ts"],
+	"exclude": [],
+	"compilerOptions": {
+		"rootDir": ".."
+	}
+}
diff --git a/tests/ui/sidebar-action.spec.ts b/tests/ui/sidebar-action.spec.ts
new file mode 100644
index 0000000..3a72566
--- /dev/null
+++ b/tests/ui/sidebar-action.spec.ts
@@ -0,0 +1,83 @@
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ * @vitest-environment happy-dom
+ */
+
+import type { ISidebarAction } from '../../lib/ui/index.ts'
+
+import { beforeEach, describe, expect, test, vi } from 'vitest'
+import { getSidebarActions, registerSidebarAction } from '../../lib/ui/index.ts'
+
+describe('sidebar action', () => {
+	const elementsSpy = vi.spyOn(window.customElements, 'get')
+
+	beforeEach(() => {
+		vi.resetAllMocks()
+		elementsSpy.mockImplementation((id: string) => id.startsWith('oca_myapp') ? class extends HTMLElement {} : undefined)
+		delete window._nc_files_sharing_sidebar_actions
+	})
+
+	test('register action', async () => {
+		registerSidebarAction(createAction())
+		expect(window._nc_files_sharing_sidebar_actions).toHaveLength(1)
+		expect(elementsSpy).toHaveBeenCalledOnce()
+	})
+
+	test('register multiple actions', async () => {
+		registerSidebarAction(createAction())
+		registerSidebarAction({ ...createAction(), id: 'test-2' })
+		expect(window._nc_files_sharing_sidebar_actions).toHaveLength(2)
+		expect(elementsSpy).toHaveBeenCalledTimes(2)
+	})
+
+	test('get registered actions', async () => {
+		registerSidebarAction(createAction())
+		registerSidebarAction({ ...createAction(), id: 'test-2' })
+		expect(getSidebarActions()).toHaveLength(2)
+		expect(getSidebarActions().map(({ id }) => id)).toEqual(['test', 'test-2'])
+	})
+
+	test('register same action twice', async () => {
+		registerSidebarAction(createAction())
+		expect(() => registerSidebarAction(createAction())).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar action with id "test" is already registered]')
+	})
+
+	test('register action with missing id', async () => {
+		expect(() => registerSidebarAction({
+			...createAction(),
+			id: '',
+		})).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar actions must have an id]')
+	})
+
+	test('register action with missing enabled', async () => {
+		const action = createAction()
+		// @ts-expect-error mocking for tests
+		delete action.enabled
+
+		expect(() => registerSidebarAction(action)).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar actions must implement the "enabled" method]')
+	})
+
+	test('register action with invalid element', async () => {
+		const action = createAction()
+		action.element = 'invalid-element'
+
+		expect(() => registerSidebarAction(action)).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar actions must provide a registered custom web component identifier]')
+	})
+
+	test('register action with unregistered element', async () => {
+		const action = createAction()
+		action.element = 'oca_non_existent_element'
+
+		expect(() => registerSidebarAction(action)).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar actions must provide a registered custom web component identifier]')
+	})
+})
+
+function createAction(): ISidebarAction {
+	return {
+		id: 'test',
+		order: 0,
+		element: 'oca_myapp-sharing_action',
+		enabled: vi.fn(),
+	}
+}
diff --git a/tests/ui/sidebar-inline-action.spec.ts b/tests/ui/sidebar-inline-action.spec.ts
new file mode 100644
index 0000000..6cf4332
--- /dev/null
+++ b/tests/ui/sidebar-inline-action.spec.ts
@@ -0,0 +1,78 @@
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ * @vitest-environment happy-dom
+ */
+
+import type { ISidebarInlineAction } from '../../lib/ui/index.ts'
+
+import { beforeEach, describe, expect, test, vi } from 'vitest'
+import { getSidebarInlineActions, registerSidebarInlineAction } from '../../lib/ui/index.ts'
+
+describe('sidebar inline action', () => {
+	beforeEach(() => {
+		delete window._nc_files_sharing_sidebar_inline_actions
+	})
+
+	test('register action', async () => {
+		registerSidebarInlineAction(createAction())
+		expect(window._nc_files_sharing_sidebar_inline_actions).toHaveLength(1)
+	})
+
+	test('register multiple actions', async () => {
+		registerSidebarInlineAction(createAction())
+		registerSidebarInlineAction({ ...createAction(), id: 'test-2' })
+		expect(window._nc_files_sharing_sidebar_inline_actions).toHaveLength(2)
+	})
+
+	test('get registered actions', async () => {
+		registerSidebarInlineAction(createAction())
+		registerSidebarInlineAction({ ...createAction(), id: 'test-2' })
+		expect(getSidebarInlineActions()).toHaveLength(2)
+		expect(getSidebarInlineActions().map(({ id }) => id)).toEqual(['test', 'test-2'])
+	})
+
+	test('register same action twice', async () => {
+		registerSidebarInlineAction(createAction())
+		expect(() => registerSidebarInlineAction(createAction())).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar action with id "test" is already registered]')
+	})
+
+	test('register action with missing id', async () => {
+		expect(() => registerSidebarInlineAction({
+			...createAction(),
+			id: '',
+		})).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar actions must have an id]')
+	})
+
+	test.for`
+	method
+	--
+	${'enabled'}
+	${'label'}
+	${'exec'}
+	`('register action with missing $method', async ({ method }) => {
+		const action = createAction()
+		// @ts-expect-error mocking for tests
+		delete action[method]
+
+		expect(() => registerSidebarInlineAction(action)).toThrowError()
+	})
+
+	test('register action with invalid icon', async () => {
+		expect(() => registerSidebarInlineAction({
+			...createAction(),
+			iconSvg: '<div></div>',
+		})).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar actions must have the "iconSvg" property]')
+	})
+})
+
+function createAction(): ISidebarInlineAction {
+	return {
+		id: 'test',
+		order: 0,
+		iconSvg: '<svg></svg>',
+		enabled: vi.fn(),
+		label: vi.fn(),
+		exec: vi.fn(),
+	}
+}
diff --git a/tests/ui/sidebar-section.spec.ts b/tests/ui/sidebar-section.spec.ts
new file mode 100644
index 0000000..ba90c58
--- /dev/null
+++ b/tests/ui/sidebar-section.spec.ts
@@ -0,0 +1,83 @@
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ * @vitest-environment happy-dom
+ */
+
+import type { ISidebarSection } from '../../lib/ui/index.ts'
+
+import { beforeEach, describe, expect, test, vi } from 'vitest'
+import { getSidebarSections, registerSidebarSection } from '../../lib/ui/index.ts'
+
+describe('sidebar section', () => {
+	const elementsSpy = vi.spyOn(window.customElements, 'get')
+
+	beforeEach(() => {
+		vi.resetAllMocks()
+		elementsSpy.mockImplementation((id: string) => id.startsWith('oca_myapp') ? class extends HTMLElement {} : undefined)
+		delete window._nc_files_sharing_sidebar_sections
+	})
+
+	test('register section', async () => {
+		registerSidebarSection(createSection())
+		expect(window._nc_files_sharing_sidebar_sections).toHaveLength(1)
+		expect(elementsSpy).toHaveBeenCalledOnce()
+	})
+
+	test('register multiple sections', async () => {
+		registerSidebarSection(createSection())
+		registerSidebarSection({ ...createSection(), id: 'test-2' })
+		expect(window._nc_files_sharing_sidebar_sections).toHaveLength(2)
+		expect(elementsSpy).toHaveBeenCalledTimes(2)
+	})
+
+	test('get registered sections', async () => {
+		registerSidebarSection(createSection())
+		registerSidebarSection({ ...createSection(), id: 'test-2' })
+		expect(getSidebarSections()).toHaveLength(2)
+		expect(getSidebarSections().map(({ id }) => id)).toEqual(['test', 'test-2'])
+	})
+
+	test('register same section twice', async () => {
+		registerSidebarSection(createSection())
+		expect(() => registerSidebarSection(createSection())).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar section with id "test" is already registered]')
+	})
+
+	test('register section with missing id', async () => {
+		expect(() => registerSidebarSection({
+			...createSection(),
+			id: '',
+		})).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar sections must have an id]')
+	})
+
+	test('register section with missing enabled', async () => {
+		const section = createSection()
+		// @ts-expect-error mocking for tests
+		delete section.enabled
+
+		expect(() => registerSidebarSection(section)).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar sections must implement the enabled method]')
+	})
+
+	test('register section with invalid element', async () => {
+		const section = createSection()
+		section.element = 'invalid-element'
+
+		expect(() => registerSidebarSection(section)).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar sections must provide a registered custom web component identifier]')
+	})
+
+	test('register section with unregistered element', async () => {
+		const section = createSection()
+		section.element = 'oca_non_existent_element'
+
+		expect(() => registerSidebarSection(section)).toThrowErrorMatchingInlineSnapshot('[Error: Sidebar sections must provide a registered custom web component identifier]')
+	})
+})
+
+function createSection(): ISidebarSection {
+	return {
+		id: 'test',
+		order: 0,
+		element: 'oca_myapp-sharing_section',
+		enabled: vi.fn(),
+	}
+}
diff --git a/tsconfig.json b/tsconfig.json
index 6f69eff..deb0819 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -3,9 +3,9 @@
 	"exclude": ["lib/**/*.spec.ts"],
 	"compilerOptions": {
 		"rootDir": "lib",
-		"target": "ESNext",
-		"module": "nodenext",
-		"moduleResolution": "nodenext",
+		"target": "esnext",
+		"module": "esnext",
+		"moduleResolution": "bundler",
 		"declaration": true,
 		"outDir": "./dist",
 		"strict": true,