diff --git a/eslint.config.js b/eslint.config.js
index fde5c2c1162..7c87b5b0b1e 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -374,7 +374,6 @@ export default tseslint.config(
 			'src/vs/base/node/processes.ts',
 			'src/vs/base/common/arrays.ts',
 			'src/vs/base/common/async.ts',
-			'src/vs/base/common/cancellation.ts',
 			'src/vs/base/common/collections.ts',
 			'src/vs/base/common/console.ts',
 			'src/vs/base/common/controlFlow.ts',
@@ -389,7 +388,6 @@ export default tseslint.config(
 			'src/vs/base/common/json.ts',
 			'src/vs/base/common/jsonSchema.ts',
 			'src/vs/base/common/lifecycle.ts',
-			'src/vs/base/common/linkedList.ts',
 			'src/vs/base/common/map.ts',
 			'src/vs/base/common/marshalling.ts',
 			'src/vs/base/common/network.ts',
@@ -399,9 +397,7 @@ export default tseslint.config(
 			'src/vs/base/common/platform.ts',
 			'src/vs/base/common/processes.ts',
 			'src/vs/base/common/resourceTree.ts',
-			'src/vs/base/common/skipList.ts',
 			'src/vs/base/common/strings.ts',
-			'src/vs/base/common/ternarySearchTree.ts',
 			'src/vs/base/common/types.ts',
 			'src/vs/base/common/uriIpc.ts',
 			'src/vs/base/common/verifier.ts',
@@ -471,7 +467,6 @@ export default tseslint.config(
 			'src/vs/platform/contextkey/browser/contextKeyService.ts',
 			'src/vs/platform/contextkey/common/contextkey.ts',
 			'src/vs/platform/contextview/browser/contextView.ts',
-			'src/vs/platform/contextview/browser/contextViewService.ts',
 			'src/vs/platform/debug/common/extensionHostDebugIpc.ts',
 			'src/vs/platform/debug/electron-main/extensionHostDebugIpc.ts',
 			'src/vs/platform/diagnostics/common/diagnostics.ts',
@@ -573,8 +568,6 @@ export default tseslint.config(
 			'src/vs/editor/contrib/codeAction/browser/codeAction.ts',
 			'src/vs/editor/contrib/codeAction/browser/codeActionCommands.ts',
 			'src/vs/editor/contrib/codeAction/common/types.ts',
-			'src/vs/editor/contrib/codelens/browser/codelens.ts',
-			'src/vs/editor/contrib/codelens/browser/codelensController.ts',
 			'src/vs/editor/contrib/colorPicker/browser/colorDetector.ts',
 			'src/vs/editor/contrib/diffEditorBreadcrumbs/browser/contribution.ts',
 			'src/vs/editor/contrib/dropOrPasteInto/browser/dropIntoEditorContribution.ts',
@@ -617,8 +610,6 @@ export default tseslint.config(
 			'src/vs/workbench/api/common/extHostConsoleForwarder.ts',
 			'src/vs/workbench/api/common/extHostDataChannels.ts',
 			'src/vs/workbench/api/common/extHostDebugService.ts',
-			'src/vs/workbench/api/common/extHostDiagnostics.ts',
-			'src/vs/workbench/api/common/extHostDocumentSaveParticipant.ts',
 			'src/vs/workbench/api/common/extHostExtensionActivator.ts',
 			'src/vs/workbench/api/common/extHostExtensionService.ts',
 			'src/vs/workbench/api/common/extHostFileSystemConsumer.ts',
@@ -941,7 +932,7 @@ export default tseslint.config(
 			'@typescript-eslint/no-explicit-any': [
 				'warn',
 				{
-					'fixToUnknown': true
+					'fixToUnknown': false
 				}
 			]
 		}
diff --git a/src/vs/base/common/cancellation.ts b/src/vs/base/common/cancellation.ts
index 3be4a90a103..e04c9277b85 100644
--- a/src/vs/base/common/cancellation.ts
+++ b/src/vs/base/common/cancellation.ts
@@ -21,10 +21,10 @@ export interface CancellationToken {
 	 *
 	 * @event
 	 */
-	readonly onCancellationRequested: (listener: (e: any) => any, thisArgs?: any, disposables?: IDisposable[]) => IDisposable;
+	readonly onCancellationRequested: (listener: (e: void) => unknown, thisArgs?: unknown, disposables?: IDisposable[]) => IDisposable;
 }
 
-const shortcutEvent: Event<any> = Object.freeze(function (callback, context?): IDisposable {
+const shortcutEvent: Event<void> = Object.freeze(function (callback, context?): IDisposable {
 	const handle = setTimeout(callback.bind(context), 0);
 	return { dispose() { clearTimeout(handle); } };
 });
@@ -60,7 +60,7 @@ export namespace CancellationToken {
 class MutableToken implements CancellationToken {
 
 	private _isCancelled: boolean = false;
-	private _emitter: Emitter<any> | null = null;
+	private _emitter: Emitter<void> | null = null;
 
 	public cancel() {
 		if (!this._isCancelled) {
@@ -76,12 +76,12 @@ class MutableToken implements CancellationToken {
 		return this._isCancelled;
 	}
 
-	get onCancellationRequested(): Event<any> {
+	get onCancellationRequested(): Event<void> {
 		if (this._isCancelled) {
 			return shortcutEvent;
 		}
 		if (!this._emitter) {
-			this._emitter = new Emitter<any>();
+			this._emitter = new Emitter<void>();
 		}
 		return this._emitter.event;
 	}
diff --git a/src/vs/base/common/linkedList.ts b/src/vs/base/common/linkedList.ts
index 9e6d3333e32..b436c611717 100644
--- a/src/vs/base/common/linkedList.ts
+++ b/src/vs/base/common/linkedList.ts
@@ -5,11 +5,11 @@
 
 class Node<E> {
 
-	static readonly Undefined = new Node<any>(undefined);
+	static readonly Undefined = new Node<unknown>(undefined);
 
 	element: E;
-	next: Node<E>;
-	prev: Node<E>;
+	next: Node<E> | typeof Node.Undefined;
+	prev: Node<E> | typeof Node.Undefined;
 
 	constructor(element: E) {
 		this.element = element;
@@ -20,8 +20,8 @@ class Node<E> {
 
 export class LinkedList<E> {
 
-	private _first: Node<E> = Node.Undefined;
-	private _last: Node<E> = Node.Undefined;
+	private _first: Node<E> | typeof Node.Undefined = Node.Undefined;
+	private _last: Node<E> | typeof Node.Undefined = Node.Undefined;
 	private _size: number = 0;
 
 	get size(): number {
@@ -91,7 +91,7 @@ export class LinkedList<E> {
 		} else {
 			const res = this._first.element;
 			this._remove(this._first);
-			return res;
+			return res as E;
 		}
 	}
 
@@ -101,7 +101,7 @@ export class LinkedList<E> {
 		} else {
 			const res = this._last.element;
 			this._remove(this._last);
-			return res;
+			return res as E;
 		}
 	}
 
@@ -110,11 +110,11 @@ export class LinkedList<E> {
 			return undefined;
 		} else {
 			const res = this._last.element;
-			return res;
+			return res as E;
 		}
 	}
 
-	private _remove(node: Node<E>): void {
+	private _remove(node: Node<E> | typeof Node.Undefined): void {
 		if (node.prev !== Node.Undefined && node.next !== Node.Undefined) {
 			// middle
 			const anchor = node.prev;
@@ -144,7 +144,7 @@ export class LinkedList<E> {
 	*[Symbol.iterator](): Iterator<E> {
 		let node = this._first;
 		while (node !== Node.Undefined) {
-			yield node.element;
+			yield node.element as E;
 			node = node.next;
 		}
 	}
diff --git a/src/vs/base/common/map.ts b/src/vs/base/common/map.ts
index 377e37e6ea1..0eb115b0df0 100644
--- a/src/vs/base/common/map.ts
+++ b/src/vs/base/common/map.ts
@@ -116,7 +116,7 @@ export class ResourceMap<T> implements Map<URI, T> {
 		return this.map.delete(this.toKey(resource));
 	}
 
-	forEach(clb: (value: T, key: URI, map: Map<URI, T>) => void, thisArg?: any): void {
+	forEach(clb: (value: T, key: URI, map: Map<URI, T>) => void, thisArg?: object): void {
 		if (typeof thisArg !== 'undefined') {
 			clb = clb.bind(thisArg);
 		}
@@ -185,7 +185,7 @@ export class ResourceSet implements Set<URI> {
 		return this._map.delete(value);
 	}
 
-	forEach(callbackfn: (value: URI, value2: URI, set: Set<URI>) => void, thisArg?: any): void {
+	forEach(callbackfn: (value: URI, value2: URI, set: Set<URI>) => void, thisArg?: unknown): void {
 		this._map.forEach((_value, key) => callbackfn.call(thisArg, key, key, this));
 	}
 
@@ -340,7 +340,7 @@ export class LinkedMap<K, V> implements Map<K, V> {
 		return item.value;
 	}
 
-	forEach(callbackfn: (value: V, key: K, map: LinkedMap<K, V>) => void, thisArg?: any): void {
+	forEach(callbackfn: (value: V, key: K, map: LinkedMap<K, V>) => void, thisArg?: unknown): void {
 		const state = this._state;
 		let current = this._head;
 		while (current) {
@@ -789,7 +789,7 @@ export class BidirectionalMap<K, V> {
 		return true;
 	}
 
-	forEach(callbackfn: (value: V, key: K, map: BidirectionalMap<K, V>) => void, thisArg?: any): void {
+	forEach(callbackfn: (value: V, key: K, map: BidirectionalMap<K, V>) => void, thisArg?: unknown): void {
 		this._m1.forEach((value, key) => {
 			callbackfn.call(thisArg, value, key, this);
 		});
diff --git a/src/vs/base/common/skipList.ts b/src/vs/base/common/skipList.ts
index 295adb603fe..b88184f9935 100644
--- a/src/vs/base/common/skipList.ts
+++ b/src/vs/base/common/skipList.ts
@@ -35,8 +35,8 @@ export class SkipList<K, V> implements Map<K, V> {
 		capacity: number = 2 ** 16
 	) {
 		this._maxLevel = Math.max(1, Math.log2(capacity) | 0);
-		// eslint-disable-next-line local/code-no-any-casts
-		this._header = <any>new Node(this._maxLevel, NIL, NIL);
+
+		this._header = new Node(this._maxLevel, <K>NIL, <V>NIL);
 	}
 
 	get size(): number {
@@ -44,8 +44,8 @@ export class SkipList<K, V> implements Map<K, V> {
 	}
 
 	clear(): void {
-		// eslint-disable-next-line local/code-no-any-casts
-		this._header = <any>new Node(this._maxLevel, NIL, NIL);
+
+		this._header = new Node(this._maxLevel, <K>NIL, <V>NIL);
 		this._size = 0;
 	}
 
@@ -74,7 +74,7 @@ export class SkipList<K, V> implements Map<K, V> {
 
 	// --- iteration
 
-	forEach(callbackfn: (value: V, key: K, map: Map<K, V>) => void, thisArg?: any): void {
+	forEach(callbackfn: (value: V, key: K, map: Map<K, V>) => void, thisArg?: unknown): void {
 		let node = this._header.forward[0];
 		while (node) {
 			callbackfn.call(thisArg, node.value, node.key, this);
@@ -169,7 +169,7 @@ export class SkipList<K, V> implements Map<K, V> {
 		}
 	}
 
-	private static _randomLevel(list: SkipList<any, any>, p: number = 0.5): number {
+	private static _randomLevel<K, V>(list: SkipList<K, V>, p: number = 0.5): number {
 		let lvl = 1;
 		while (Math.random() < p && lvl < list._maxLevel) {
 			lvl += 1;
diff --git a/src/vs/base/common/ternarySearchTree.ts b/src/vs/base/common/ternarySearchTree.ts
index 0364b263f69..d184ed1765e 100644
--- a/src/vs/base/common/ternarySearchTree.ts
+++ b/src/vs/base/common/ternarySearchTree.ts
@@ -781,7 +781,7 @@ export class TernarySearchTree<K, V> {
 
 	// for debug/testing
 	_isBalanced(): boolean {
-		const nodeIsBalanced = (node: TernarySearchTreeNode<any, any> | undefined): boolean => {
+		const nodeIsBalanced = (node: TernarySearchTreeNode<unknown, unknown> | undefined): boolean => {
 			if (!node) {
 				return true;
 			}
diff --git a/src/vs/editor/contrib/codelens/browser/codelens.ts b/src/vs/editor/contrib/codelens/browser/codelens.ts
index c91c3092043..fdbcf259f18 100644
--- a/src/vs/editor/contrib/codelens/browser/codelens.ts
+++ b/src/vs/editor/contrib/codelens/browser/codelens.ts
@@ -112,7 +112,7 @@ CommandsRegistry.registerCommand('_executeCodeLensProvider', function (accessor,
 	return getCodeLensModel(codeLensProvider, model, CancellationToken.None).then(value => {
 
 		disposables.add(value);
-		const resolve: Promise<any>[] = [];
+		const resolve: Promise<unknown>[] = [];
 
 		for (const item of value.lenses) {
 			if (itemResolveCount === undefined || itemResolveCount === null || Boolean(item.symbol.command)) {
diff --git a/src/vs/editor/contrib/codelens/browser/codelensController.ts b/src/vs/editor/contrib/codelens/browser/codelensController.ts
index f34e88a4d24..3a3877a2664 100644
--- a/src/vs/editor/contrib/codelens/browser/codelensController.ts
+++ b/src/vs/editor/contrib/codelens/browser/codelensController.ts
@@ -42,7 +42,7 @@ export class CodeLensContribution implements IEditorContribution {
 	private _getCodeLensModelPromise: CancelablePromise<CodeLensModel> | undefined;
 	private readonly _oldCodeLensModels = new DisposableStore();
 	private _currentCodeLensModel: CodeLensModel | undefined;
-	private _resolveCodeLensesPromise: CancelablePromise<any> | undefined;
+	private _resolveCodeLensesPromise: CancelablePromise<void[]> | undefined;
 
 	constructor(
 		private readonly _editor: ICodeEditor,
diff --git a/src/vs/monaco.d.ts b/src/vs/monaco.d.ts
index 3060d527d84..0c65323c6b5 100644
--- a/src/vs/monaco.d.ts
+++ b/src/vs/monaco.d.ts
@@ -103,7 +103,7 @@ declare namespace monaco {
 		 *
 		 * @event
 		 */
-		readonly onCancellationRequested: (listener: (e: any) => any, thisArgs?: any, disposables?: IDisposable[]) => IDisposable;
+		readonly onCancellationRequested: (listener: (e: void) => unknown, thisArgs?: unknown, disposables?: IDisposable[]) => IDisposable;
 	}
 	/**
 	 * Uniform Resource Identifier (Uri) http://tools.ietf.org/html/rfc3986.
diff --git a/src/vs/platform/contextview/browser/contextViewService.ts b/src/vs/platform/contextview/browser/contextViewService.ts
index 734a1f32603..1ca549dc76c 100644
--- a/src/vs/platform/contextview/browser/contextViewService.ts
+++ b/src/vs/platform/contextview/browser/contextViewService.ts
@@ -61,7 +61,7 @@ export class ContextViewHandler extends Disposable implements IContextViewProvid
 		this.contextView.layout();
 	}
 
-	hideContextView(data?: any): void {
+	hideContextView(data?: unknown): void {
 		this.contextView.hide(data);
 		this.openContextView = undefined;
 	}
diff --git a/src/vs/workbench/api/common/extHostDiagnostics.ts b/src/vs/workbench/api/common/extHostDiagnostics.ts
index fe0367ccad6..d3e84c8d05f 100644
--- a/src/vs/workbench/api/common/extHostDiagnostics.ts
+++ b/src/vs/workbench/api/common/extHostDiagnostics.ts
@@ -186,7 +186,7 @@ export class DiagnosticCollection implements vscode.DiagnosticCollection {
 		this.#proxy?.$clear(this._owner);
 	}
 
-	forEach(callback: (uri: URI, diagnostics: ReadonlyArray<vscode.Diagnostic>, collection: DiagnosticCollection) => any, thisArg?: any): void {
+	forEach(callback: (uri: URI, diagnostics: ReadonlyArray<vscode.Diagnostic>, collection: DiagnosticCollection) => unknown, thisArg?: unknown): void {
 		this._checkDisposed();
 		for (const [uri, values] of this) {
 			callback.call(thisArg, uri, values, this);
diff --git a/src/vs/workbench/api/common/extHostDocumentSaveParticipant.ts b/src/vs/workbench/api/common/extHostDocumentSaveParticipant.ts
index f46aa4b4686..ef4941c549e 100644
--- a/src/vs/workbench/api/common/extHostDocumentSaveParticipant.ts
+++ b/src/vs/workbench/api/common/extHostDocumentSaveParticipant.ts
@@ -17,7 +17,7 @@ import { ILogService } from '../../../platform/log/common/log.js';
 import { IExtensionDescription } from '../../../platform/extensions/common/extensions.js';
 import { SerializableObjectWithBuffers } from '../../services/extensions/common/proxyIdentifier.js';
 
-type Listener = [Function, any, IExtensionDescription];
+type Listener = [Function, unknown, IExtensionDescription];
 
 export class ExtHostDocumentSaveParticipant implements ExtHostDocumentSaveParticipantShape {
 
@@ -62,8 +62,8 @@ export class ExtHostDocumentSaveParticipant implements ExtHostDocumentSavePartic
 					break;
 				}
 				const document = this._documents.getDocument(resource);
-				// eslint-disable-next-line local/code-no-any-casts
-				const success = await this._deliverEventAsyncAndBlameBadListeners(listener, <any>{ document, reason: TextDocumentSaveReason.to(reason) });
+
+				const success = await this._deliverEventAsyncAndBlameBadListeners(listener, { document, reason: TextDocumentSaveReason.to(reason) });
 				results.push(success);
 			}
 		} finally {
@@ -72,7 +72,7 @@ export class ExtHostDocumentSaveParticipant implements ExtHostDocumentSavePartic
 		return results;
 	}
 
-	private _deliverEventAsyncAndBlameBadListeners([listener, thisArg, extension]: Listener, stubEvent: vscode.TextDocumentWillSaveEvent): Promise<any> {
+	private _deliverEventAsyncAndBlameBadListeners([listener, thisArg, extension]: Listener, stubEvent: Pick<vscode.TextDocumentWillSaveEvent, 'document' | 'reason'>): Promise<boolean> {
 		const errors = this._badListeners.get(listener);
 		if (typeof errors === 'number' && errors > this._thresholds.errors) {
 			// bad listener - ignore
@@ -100,7 +100,7 @@ export class ExtHostDocumentSaveParticipant implements ExtHostDocumentSavePartic
 		});
 	}
 
-	private _deliverEventAsync(extension: IExtensionDescription, listener: Function, thisArg: any, stubEvent: vscode.TextDocumentWillSaveEvent): Promise<any> {
+	private _deliverEventAsync(extension: IExtensionDescription, listener: Function, thisArg: unknown, stubEvent: Pick<vscode.TextDocumentWillSaveEvent, 'document' | 'reason'>): Promise<boolean | undefined> {
 
 		const promises: Promise<vscode.TextEdit[]>[] = [];
 
@@ -111,6 +111,7 @@ export class ExtHostDocumentSaveParticipant implements ExtHostDocumentSavePartic
 		const event = Object.freeze<vscode.TextDocumentWillSaveEvent>({
 			document,
 			reason,
+			// eslint-disable-next-line @typescript-eslint/no-explicit-any
 			waitUntil(p: Promise<any | vscode.TextEdit[]>) {
 				if (Object.isFrozen(promises)) {
 					throw illegalState('waitUntil can not be called async');