diff --git a/eslint.config.js b/eslint.config.js
index 4811f9625e9..5f42abbc744 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -1487,32 +1487,27 @@ export default tseslint.config(
 			'@typescript-eslint/no-base-to-string': 'error',
 			'@typescript-eslint/no-confusing-non-null-assertion': 'error',
 			'@typescript-eslint/no-confusing-void-expression': 'error',
-			// '@typescript-eslint/no-duplicate-enum-values': 'error',
-			// '@typescript-eslint/no-dynamic-delete': 'error',
-			// 'no-empty-function': 'off', '@typescript-eslint/no-empty-function': [
-			// 	'error',
-			// 	{
-			// 		'allow': [
-			// 			'private-constructors'
-			// 		]
-			// 	}
-			// ],
-			// '@typescript-eslint/no-empty-object-type': 'error',
-			// '@typescript-eslint/no-explicit-any': 'error',
-			// '@typescript-eslint/no-extra-non-null-assertion': 'error',
-			// '@typescript-eslint/no-extraneous-class': 'error',
+			'@typescript-eslint/no-duplicate-enum-values': 'error',
+			'@typescript-eslint/no-dynamic-delete': 'error',
+			'no-empty-function': 'off', '@typescript-eslint/no-empty-function': [
+				'error', { 'allow': ['private-constructors'] }
+			],
+			'@typescript-eslint/no-empty-object-type': 'error',
+			'@typescript-eslint/no-explicit-any': ['error', { 'ignoreRestArgs': true }],
+			'@typescript-eslint/no-extra-non-null-assertion': 'error',
+			'@typescript-eslint/no-extraneous-class': 'error',
+			'@typescript-eslint/no-for-in-array': 'error',
+			'no-implied-eval': 'off', '@typescript-eslint/no-implied-eval': 'error',
+			'@typescript-eslint/no-invalid-void-type': 'error',
+			'no-loop-func': 'off', '@typescript-eslint/no-loop-func': 'error',
+			'@typescript-eslint/no-misused-new': 'warn',
+			'@typescript-eslint/no-mixed-enums': 'error',
 			// '@typescript-eslint/no-floating-promises': 'error',
-			// '@typescript-eslint/no-for-in-array': 'error',
-			// 'no-implied-eval': 'off', '@typescript-eslint/no-implied-eval': 'error',
-			// '@typescript-eslint/no-invalid-void-type': 'error',
-			// 'no-loop-func': 'off', '@typescript-eslint/no-loop-func': 'error',
-			// '@typescript-eslint/no-misused-new': 'warn',
 			// '@typescript-eslint/no-misused-promises': 'error',
-			// '@typescript-eslint/no-mixed-enums': 'error',
-			// '@typescript-eslint/no-non-null-asserted-nullish-coalescing': 'error',
-			// '@typescript-eslint/no-non-null-asserted-optional-chain': 'error',
-			// '@typescript-eslint/no-non-null-assertion': 'error',
-			// '@typescript-eslint/no-redundant-type-constituents': 'error',
+			'@typescript-eslint/no-non-null-asserted-nullish-coalescing': 'error',
+			'@typescript-eslint/no-non-null-asserted-optional-chain': 'error',
+			'@typescript-eslint/no-non-null-assertion': 'error',
+			'@typescript-eslint/no-redundant-type-constituents': 'error',
 			'@typescript-eslint/naming-convention': [
 				'warn',
 				{ 'selector': 'variable', 'format': ['camelCase', 'UPPER_CASE', 'PascalCase'] },
diff --git a/src/vs/editor/common/codecs/simpleCodec/parserBase.ts b/src/vs/editor/common/codecs/simpleCodec/parserBase.ts
index afd3051309e..3df13577159 100644
--- a/src/vs/editor/common/codecs/simpleCodec/parserBase.ts
+++ b/src/vs/editor/common/codecs/simpleCodec/parserBase.ts
@@ -111,7 +111,7 @@ export abstract class ParserBase<TToken extends BaseToken, TNextObject> {
  *
  * @throws the resulting decorated method throws if the parser object was already consumed.
  */
-export function assertNotConsumed<T extends ParserBase<any, any>>(
+export function assertNotConsumed<T extends ParserBase<BaseToken, unknown>>(
 	_target: T,
 	propertyKey: 'accept',
 	descriptor: PropertyDescriptor,
diff --git a/src/vs/editor/common/codecs/utils/tokenStream.ts b/src/vs/editor/common/codecs/utils/tokenStream.ts
index a09c3a9858c..94585882bb6 100644
--- a/src/vs/editor/common/codecs/utils/tokenStream.ts
+++ b/src/vs/editor/common/codecs/utils/tokenStream.ts
@@ -64,7 +64,7 @@ export class TokenStream<T extends BaseToken> extends ObservableDisposable imple
 		}
 
 		// periodically send tokens to the stream
-		this.interval = setInterval(() => {
+		this.interval = setInterval(async () => {
 			if (this.tokensLeft === 0) {
 				clearInterval(this.interval);
 				delete this.interval;
@@ -72,7 +72,7 @@ export class TokenStream<T extends BaseToken> extends ObservableDisposable imple
 				return;
 			}
 
-			this.sendTokens();
+			await this.sendTokens();
 		}, 1);
 
 		return this;
@@ -95,9 +95,9 @@ export class TokenStream<T extends BaseToken> extends ObservableDisposable imple
 	/**
 	 * Sends a provided number of tokens to the stream.
 	 */
-	private sendTokens(
+	private async sendTokens(
 		tokensCount: number = 25,
-	): void {
+	): Promise<void> {
 		if (this.tokensLeft <= 0) {
 			return;
 		}
@@ -110,9 +110,14 @@ export class TokenStream<T extends BaseToken> extends ObservableDisposable imple
 				`Token index '${this.index}' is out of bounds.`,
 			);
 
-			this.stream.write(this.tokens[this.index]);
-			this.index++;
-			tokensToSend--;
+			try {
+				await this.stream.write(this.tokens[this.index]);
+				this.index++;
+				tokensToSend--;
+			} catch {
+				this.stopStream();
+				return;
+			}
 		}
 
 		// if sent all tokens, end the stream immediately
@@ -148,7 +153,7 @@ export class TokenStream<T extends BaseToken> extends ObservableDisposable imple
 	public on(event: 'data', callback: (data: T) => void): void;
 	public on(event: 'error', callback: (err: Error) => void): void;
 	public on(event: 'end', callback: () => void): void;
-	public on(event: 'data' | 'error' | 'end', callback: (arg?: any) => void): void {
+	public on(event: 'data' | 'error' | 'end', callback: (...args: any[]) => void): void {
 		if (event === 'data') {
 			this.stream.on(event, callback);
 			// this is the convention of the readable stream, - when
diff --git a/src/vs/workbench/contrib/chat/common/promptSyntax/contentProviders/textModelContentsProvider.ts b/src/vs/workbench/contrib/chat/common/promptSyntax/contentProviders/textModelContentsProvider.ts
index 5ec7f47ac1b..e6e561f1c6e 100644
--- a/src/vs/workbench/contrib/chat/common/promptSyntax/contentProviders/textModelContentsProvider.ts
+++ b/src/vs/workbench/contrib/chat/common/promptSyntax/contentProviders/textModelContentsProvider.ts
@@ -79,7 +79,7 @@ export class TextModelContentsProvider extends PromptContentsProviderBase<IModel
 		// to avoid blocking the main thread and save system resources used
 		let i = 1;
 		const linesCount = this.model.getLineCount();
-		const interval = setInterval(() => {
+		const interval = setInterval(async () => {
 			// if we have written all lines or lines count is zero,
 			// end the stream and stop the interval timer
 			if (i >= linesCount) {
@@ -99,14 +99,14 @@ export class TextModelContentsProvider extends PromptContentsProviderBase<IModel
 
 			try {
 				// write the current line to the stream
-				stream.write(
+				await stream.write(
 					VSBuffer.fromString(this.model.getLineContent(i)),
 				);
 
 				// for all lines except the last one, write the EOL character
 				// to separate the lines in the stream
 				if (i !== linesCount) {
-					stream.write(
+					await stream.write(
 						VSBuffer.fromString(this.model.getEOL()),
 					);
 				}
diff --git a/src/vs/workbench/contrib/chat/common/promptSyntax/contributions/configMigration.ts b/src/vs/workbench/contrib/chat/common/promptSyntax/contributions/configMigration.ts
index 1baac3ffc4d..1c4eeb43b66 100644
--- a/src/vs/workbench/contrib/chat/common/promptSyntax/contributions/configMigration.ts
+++ b/src/vs/workbench/contrib/chat/common/promptSyntax/contributions/configMigration.ts
@@ -4,6 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 
 import { assert } from '../../../../../../base/common/assert.js';
+import { ILogService } from '../../../../../../platform/log/common/log.js';
 import { asBoolean } from '../../../../../../platform/prompts/common/config.js';
 import { IWorkbenchContribution } from '../../../../../common/contributions.js';
 import { IConfigurationService } from '../../../../../../platform/configuration/common/configuration.js';
@@ -16,9 +17,21 @@ import { CONFIG_KEY, PROMPT_LOCATIONS_CONFIG_KEY } from '../../../../../../platf
  */
 export class ConfigMigration implements IWorkbenchContribution {
 	constructor(
-		@IConfigurationService configService: IConfigurationService,
+		@ILogService private readonly logService: ILogService,
+		@IConfigurationService private readonly configService: IConfigurationService,
 	) {
-		const value = configService.getValue(CONFIG_KEY);
+		// migrate the old config setting value to a new one
+		this.migrateConfig()
+			.catch((error) => {
+				this.logService.warn('failed to migrate config setting value.', error);
+			});
+	}
+
+	/**
+	 * The main function that implements the migration logic.
+	 */
+	private async migrateConfig(): Promise<void> {
+		const value = await this.configService.getValue(CONFIG_KEY);
 
 		// if setting is not set, nothing to do
 		if ((value === undefined) || (value === null)) {
@@ -49,8 +62,8 @@ export class ConfigMigration implements IWorkbenchContribution {
 				locationsValue[trimmedValue] = true;
 			}
 
-			configService.updateValue(CONFIG_KEY, true);
-			configService.updateValue(PROMPT_LOCATIONS_CONFIG_KEY, locationsValue);
+			await this.configService.updateValue(CONFIG_KEY, true);
+			await this.configService.updateValue(PROMPT_LOCATIONS_CONFIG_KEY, locationsValue);
 			return;
 		}
 
@@ -82,8 +95,8 @@ export class ConfigMigration implements IWorkbenchContribution {
 				locationsValue[trimmedValue] = enabled;
 			}
 
-			configService.updateValue(CONFIG_KEY, true);
-			configService.updateValue(PROMPT_LOCATIONS_CONFIG_KEY, locationsValue);
+			await this.configService.updateValue(CONFIG_KEY, true);
+			await this.configService.updateValue(PROMPT_LOCATIONS_CONFIG_KEY, locationsValue);
 
 			return;
 		}
@@ -99,8 +112,8 @@ export class ConfigMigration implements IWorkbenchContribution {
 				`String value must not be a boolean, got '${value}'.`,
 			);
 
-			configService.updateValue(CONFIG_KEY, true);
-			configService.updateValue(PROMPT_LOCATIONS_CONFIG_KEY, { [value]: true });
+			await this.configService.updateValue(CONFIG_KEY, true);
+			await this.configService.updateValue(PROMPT_LOCATIONS_CONFIG_KEY, { [value]: true });
 			return;
 		}
 	}
diff --git a/src/vs/workbench/contrib/chat/common/promptSyntax/utils/treeUtils.ts b/src/vs/workbench/contrib/chat/common/promptSyntax/utils/treeUtils.ts
index 6c596c3ab7f..cdc81e77ec4 100644
--- a/src/vs/workbench/contrib/chat/common/promptSyntax/utils/treeUtils.ts
+++ b/src/vs/workbench/contrib/chat/common/promptSyntax/utils/treeUtils.ts
@@ -127,14 +127,14 @@ export const map = <
  * Type for a rest parameters of function, excluding
  * the first argument.
  */
-type TRestParameters<T extends (...args: any[]) => any> =
-	T extends (first: any, ...rest: infer R) => any ? R : never;
+type TRestParameters<T extends (...args: any[]) => unknown> =
+	T extends (first: Parameters<T>[0], ...rest: infer R) => unknown ? R : never;
 
 /**
  * Type for a curried function.
  * See {@link curry} for more info.
  */
-type TCurriedFunction<T extends (...args: any[]) => any> = ((...args: TRestParameters<T>) => ReturnType<T>);
+type TCurriedFunction<T extends (...args: any[]) => unknown> = ((...args: TRestParameters<T>) => ReturnType<T>);
 
 /**
  * Curry a provided function with the first argument.