diff --git a/packages/api-client/eslint.config.mjs b/packages/api-client/eslint.config.mjs
index 77a884b3b5..c2207ab1eb 100644
--- a/packages/api-client/eslint.config.mjs
+++ b/packages/api-client/eslint.config.mjs
@@ -1,7 +1,22 @@
 import config from '@modrinth/tooling-config/eslint/nuxt.mjs'
+import nPlugin from 'eslint-plugin-n'
 
 export default config.append([
 	{
 		ignores: ['dist/'],
 	},
+	{
+		plugins: {
+			n: nPlugin,
+		},
+		settings: {
+			n: {
+				tryExtensions: ['.js', '.ts', '.mjs', '.mts', '.cjs', '.cts', '.json', '.node'],
+				typescriptExtensionMap: [['.ts', '.js']],
+			},
+		},
+		rules: {
+			'n/file-extension-in-import': ['error', 'always'],
+		},
+	},
 ])
diff --git a/packages/api-client/package.json b/packages/api-client/package.json
index 0e939f041e..a19100782e 100644
--- a/packages/api-client/package.json
+++ b/packages/api-client/package.json
@@ -47,6 +47,7 @@
 		"@modrinth/tooling-config": "workspace:*",
 		"@tauri-apps/plugin-http": "^2.0.0",
 		"esbuild": "0.27.2",
+		"eslint-plugin-n": "^18.2.1",
 		"typescript": "^5.9.3"
 	},
 	"peerDependencies": {
diff --git a/packages/api-client/src/core/abstract-client.ts b/packages/api-client/src/core/abstract-client.ts
index 70c2f1584f..86fa2c6422 100644
--- a/packages/api-client/src/core/abstract-client.ts
+++ b/packages/api-client/src/core/abstract-client.ts
@@ -1,14 +1,14 @@
-import type { InferredClientModules } from '../modules'
-import { buildModuleStructure } from '../modules'
-import type { BaseUrlConfig, ClientConfig } from '../types/client'
-import type { RequestContext, RequestOptions } from '../types/request'
-import type { UploadMetadata, UploadProgress, UploadRequestOptions } from '../types/upload'
-import type { AbstractFeature } from './abstract-feature'
-import type { AbstractModule } from './abstract-module'
-import type { AbstractSyncClient } from './abstract-sync'
-import { AbstractUploadClient } from './abstract-upload-client'
-import type { AbstractWebSocketClient } from './abstract-websocket'
-import { ModrinthApiError, ModrinthServerError } from './errors'
+import type { InferredClientModules } from '../modules/index.js'
+import { buildModuleStructure } from '../modules/index.js'
+import type { BaseUrlConfig, ClientConfig } from '../types/client.js'
+import type { RequestContext, RequestOptions } from '../types/request.js'
+import type { UploadMetadata, UploadProgress, UploadRequestOptions } from '../types/upload.js'
+import type { AbstractFeature } from './abstract-feature.js'
+import type { AbstractModule } from './abstract-module.js'
+import type { AbstractSyncClient } from './abstract-sync.js'
+import { AbstractUploadClient } from './abstract-upload-client.js'
+import type { AbstractWebSocketClient } from './abstract-websocket.js'
+import { ModrinthApiError, ModrinthServerError } from './errors.js'
 
 type ArchonClientModules = Omit<InferredClientModules['archon'], 'backups_v1'> & {
 	/** @deprecated Use `backups_queue_v1` for the Backups Queue API. */
diff --git a/packages/api-client/src/core/abstract-feature.ts b/packages/api-client/src/core/abstract-feature.ts
index c324d4a57e..bda023f122 100644
--- a/packages/api-client/src/core/abstract-feature.ts
+++ b/packages/api-client/src/core/abstract-feature.ts
@@ -1,4 +1,4 @@
-import type { RequestContext } from '../types/request'
+import type { RequestContext } from '../types/request.js'
 
 /**
  * Base configuration for features
diff --git a/packages/api-client/src/core/abstract-module.ts b/packages/api-client/src/core/abstract-module.ts
index f0a8fa8cab..d9355ffbb6 100644
--- a/packages/api-client/src/core/abstract-module.ts
+++ b/packages/api-client/src/core/abstract-module.ts
@@ -1,4 +1,4 @@
-import type { AbstractModrinthClient } from './abstract-client'
+import type { AbstractModrinthClient } from './abstract-client.js'
 
 export abstract class AbstractModule {
 	protected client: AbstractModrinthClient
diff --git a/packages/api-client/src/core/abstract-sync.ts b/packages/api-client/src/core/abstract-sync.ts
index a8e31c536e..eae4629208 100644
--- a/packages/api-client/src/core/abstract-sync.ts
+++ b/packages/api-client/src/core/abstract-sync.ts
@@ -1,7 +1,7 @@
 import type mitt from 'mitt'
 
-import type { Archon } from '../modules/archon/types'
-import type { RequestOptions } from '../types/request'
+import type { Archon } from '../modules/archon/types.js'
+import type { RequestOptions } from '../types/request.js'
 
 export type SyncEventType = Archon.Sync.v1.SyncEvent['type']
 
diff --git a/packages/api-client/src/core/abstract-upload-client.ts b/packages/api-client/src/core/abstract-upload-client.ts
index 5f3974ea73..32deb3b55b 100644
--- a/packages/api-client/src/core/abstract-upload-client.ts
+++ b/packages/api-client/src/core/abstract-upload-client.ts
@@ -1,4 +1,4 @@
-import type { UploadHandle, UploadRequestOptions } from '../types/upload'
+import type { UploadHandle, UploadRequestOptions } from '../types/upload.js'
 
 /**
  * Abstract base class defining upload capability
diff --git a/packages/api-client/src/core/abstract-websocket.ts b/packages/api-client/src/core/abstract-websocket.ts
index 8d3e54ee29..aa61e32e43 100644
--- a/packages/api-client/src/core/abstract-websocket.ts
+++ b/packages/api-client/src/core/abstract-websocket.ts
@@ -1,6 +1,6 @@
 import type mitt from 'mitt'
 
-import type { Archon } from '../modules/archon/types'
+import type { Archon } from '../modules/archon/types.js'
 
 export type WebSocketEventHandler<
 	E extends Archon.Websocket.v0.WSEvent = Archon.Websocket.v0.WSEvent,
diff --git a/packages/api-client/src/core/errors.ts b/packages/api-client/src/core/errors.ts
index 6b958eb4d2..a5836e2d3a 100644
--- a/packages/api-client/src/core/errors.ts
+++ b/packages/api-client/src/core/errors.ts
@@ -1,5 +1,5 @@
-import type { ApiErrorData, ModrinthErrorResponse } from '../types/errors'
-import { isModrinthErrorResponse } from '../types/errors'
+import type { ApiErrorData, ModrinthErrorResponse } from '../types/errors.js'
+import { isModrinthErrorResponse } from '../types/errors.js'
 
 /**
  * Base error class for all Modrinth API errors
diff --git a/packages/api-client/src/features/auth.ts b/packages/api-client/src/features/auth.ts
index 0172b06a97..0334e50e50 100644
--- a/packages/api-client/src/features/auth.ts
+++ b/packages/api-client/src/features/auth.ts
@@ -1,5 +1,5 @@
-import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature'
-import type { RequestContext } from '../types/request'
+import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature.js'
+import type { RequestContext } from '../types/request.js'
 
 /**
  * Authentication feature configuration
diff --git a/packages/api-client/src/features/circuit-breaker.ts b/packages/api-client/src/features/circuit-breaker.ts
index cd846a3810..ed57bd937b 100644
--- a/packages/api-client/src/features/circuit-breaker.ts
+++ b/packages/api-client/src/features/circuit-breaker.ts
@@ -1,6 +1,6 @@
-import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature'
-import { ModrinthApiError } from '../core/errors'
-import type { RequestContext } from '../types/request'
+import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature.js'
+import { ModrinthApiError } from '../core/errors.js'
+import type { RequestContext } from '../types/request.js'
 
 /**
  * Circuit breaker state
diff --git a/packages/api-client/src/features/node-auth.ts b/packages/api-client/src/features/node-auth.ts
index c526b68f92..40cd0b0101 100644
--- a/packages/api-client/src/features/node-auth.ts
+++ b/packages/api-client/src/features/node-auth.ts
@@ -1,7 +1,7 @@
-import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature'
-import { ModrinthApiError } from '../core/errors'
-import type { RequestContext } from '../types/request'
-import { getNodeBaseUrl } from '../utils/node-url'
+import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature.js'
+import { ModrinthApiError } from '../core/errors.js'
+import type { RequestContext } from '../types/request.js'
+import { getNodeBaseUrl } from '../utils/node-url.js'
 
 /**
  * Node authentication credentials
diff --git a/packages/api-client/src/features/panel-version.ts b/packages/api-client/src/features/panel-version.ts
index 5f35bdd701..038bd2c875 100644
--- a/packages/api-client/src/features/panel-version.ts
+++ b/packages/api-client/src/features/panel-version.ts
@@ -1,5 +1,5 @@
-import { AbstractFeature } from '../core/abstract-feature'
-import type { RequestContext } from '../types/request'
+import { AbstractFeature } from '../core/abstract-feature.js'
+import type { RequestContext } from '../types/request.js'
 
 export const PANEL_VERSION = 1
 
diff --git a/packages/api-client/src/features/retry.ts b/packages/api-client/src/features/retry.ts
index 002f87da98..0f28236f2a 100644
--- a/packages/api-client/src/features/retry.ts
+++ b/packages/api-client/src/features/retry.ts
@@ -1,6 +1,6 @@
-import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature'
-import { ModrinthApiError } from '../core/errors'
-import type { RequestContext } from '../types/request'
+import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature.js'
+import { ModrinthApiError } from '../core/errors.js'
+import type { RequestContext } from '../types/request.js'
 
 /**
  * Backoff strategy for retries
diff --git a/packages/api-client/src/features/verbose-logging.ts b/packages/api-client/src/features/verbose-logging.ts
index 960443daca..88097f398f 100644
--- a/packages/api-client/src/features/verbose-logging.ts
+++ b/packages/api-client/src/features/verbose-logging.ts
@@ -1,5 +1,5 @@
-import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature'
-import type { RequestContext } from '../types/request'
+import { AbstractFeature, type FeatureConfig } from '../core/abstract-feature.js'
+import type { RequestContext } from '../types/request.js'
 
 export type VerboseLoggingConfig = FeatureConfig
 
diff --git a/packages/api-client/src/index.ts b/packages/api-client/src/index.ts
index 226adcbabd..7b5ceed538 100644
--- a/packages/api-client/src/index.ts
+++ b/packages/api-client/src/index.ts
@@ -1,5 +1,5 @@
-export { AbstractModrinthClient } from './core/abstract-client'
-export { AbstractFeature, type FeatureConfig } from './core/abstract-feature'
+export { AbstractModrinthClient } from './core/abstract-client.js'
+export { AbstractFeature, type FeatureConfig } from './core/abstract-feature.js'
 export {
 	AbstractSyncClient,
 	type SyncConnection,
@@ -10,46 +10,46 @@ export {
 	type SyncStatus,
 	type SyncStatusHandler,
 	type SyncStatusState,
-} from './core/abstract-sync'
-export { AbstractUploadClient } from './core/abstract-upload-client'
+} from './core/abstract-sync.js'
+export { AbstractUploadClient } from './core/abstract-upload-client.js'
 export {
 	AbstractWebSocketClient,
 	type WebSocketConnection,
 	type WebSocketEventHandler,
 	type WebSocketStatus,
-} from './core/abstract-websocket'
-export { ModrinthApiError, ModrinthServerError } from './core/errors'
-export { type AuthConfig, AuthFeature } from './features/auth'
+} from './core/abstract-websocket.js'
+export { ModrinthApiError, ModrinthServerError } from './core/errors.js'
+export { type AuthConfig, AuthFeature } from './features/auth.js'
 export {
 	type CircuitBreakerConfig,
 	CircuitBreakerFeature,
 	type CircuitBreakerState,
 	type CircuitBreakerStorage,
 	InMemoryCircuitBreakerStorage,
-} from './features/circuit-breaker'
-export { type NodeAuth, type NodeAuthConfig, NodeAuthFeature } from './features/node-auth'
-export { PANEL_VERSION, PanelVersionFeature } from './features/panel-version'
-export { type BackoffStrategy, type RetryConfig, RetryFeature } from './features/retry'
-export { type VerboseLoggingConfig, VerboseLoggingFeature } from './features/verbose-logging'
-export type { InferredClientModules } from './modules'
-export * from './modules/types'
-export { GenericModrinthClient } from './platform/generic'
-export type { NuxtClientConfig } from './platform/nuxt'
-export { NuxtCircuitBreakerStorage, NuxtModrinthClient } from './platform/nuxt'
-export { GenericSyncClient } from './platform/sync-generic'
-export type { TauriClientConfig } from './platform/tauri'
-export { TauriModrinthClient } from './platform/tauri'
-export { XHRUploadClient } from './platform/xhr-upload-client'
-export { clearNodeAuthState, nodeAuthState, setNodeAuthState } from './state/node-auth'
-export * from './types'
-export { withJWTRetry } from './utils/jwt-retry'
-export { getNodeWebSocketUrl } from './utils/node-url'
-export { pingWebSocketUrl, type WebSocketPingOptions } from './utils/pingtest'
+} from './features/circuit-breaker.js'
+export { type NodeAuth, type NodeAuthConfig, NodeAuthFeature } from './features/node-auth.js'
+export { PANEL_VERSION, PanelVersionFeature } from './features/panel-version.js'
+export { type BackoffStrategy, type RetryConfig, RetryFeature } from './features/retry.js'
+export { type VerboseLoggingConfig, VerboseLoggingFeature } from './features/verbose-logging.js'
+export type { InferredClientModules } from './modules/index.js'
+export * from './modules/types.js'
+export { GenericModrinthClient } from './platform/generic.js'
+export type { NuxtClientConfig } from './platform/nuxt.js'
+export { NuxtCircuitBreakerStorage, NuxtModrinthClient } from './platform/nuxt.js'
+export { GenericSyncClient } from './platform/sync-generic.js'
+export type { TauriClientConfig } from './platform/tauri.js'
+export { TauriModrinthClient } from './platform/tauri.js'
+export { XHRUploadClient } from './platform/xhr-upload-client.js'
+export { clearNodeAuthState, nodeAuthState, setNodeAuthState } from './state/node-auth.js'
+export * from './types/index.js'
+export { withJWTRetry } from './utils/jwt-retry.js'
+export { getNodeWebSocketUrl } from './utils/node-url.js'
+export { pingWebSocketUrl, type WebSocketPingOptions } from './utils/pingtest.js'
 export {
 	type ParsedSseEvent,
 	type ParsedSseItem,
 	type ParsedSseRetry,
 	parseSyncEventData,
 	SseParser,
-} from './utils/sse'
-export type { Override, RawDecimal } from './utils/types'
+} from './utils/sse.js'
+export type { Override, RawDecimal } from './utils/types.js'
diff --git a/packages/api-client/src/modules/archon/actions/v1.ts b/packages/api-client/src/modules/archon/actions/v1.ts
index 88227bf0e8..59bdc8a2de 100644
--- a/packages/api-client/src/modules/archon/actions/v1.ts
+++ b/packages/api-client/src/modules/archon/actions/v1.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 export class ArchonActionsV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/backups-queue/v1.ts b/packages/api-client/src/modules/archon/backups-queue/v1.ts
index 4e36201f14..b65865b009 100644
--- a/packages/api-client/src/modules/archon/backups-queue/v1.ts
+++ b/packages/api-client/src/modules/archon/backups-queue/v1.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 export class ArchonBackupsQueueV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/backups/v1.ts b/packages/api-client/src/modules/archon/backups/v1.ts
index 589ee72b9d..8f57cddfb6 100644
--- a/packages/api-client/src/modules/archon/backups/v1.ts
+++ b/packages/api-client/src/modules/archon/backups/v1.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 /**
  * @deprecated Use `client.archon.backups_queue_v1` (Backups Queue API) instead.
diff --git a/packages/api-client/src/modules/archon/content/v1.ts b/packages/api-client/src/modules/archon/content/v1.ts
index fa0c951d6f..81b2f08196 100644
--- a/packages/api-client/src/modules/archon/content/v1.ts
+++ b/packages/api-client/src/modules/archon/content/v1.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 export class ArchonContentV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/index.ts b/packages/api-client/src/modules/archon/index.ts
index 194ea0333e..560d04eca4 100644
--- a/packages/api-client/src/modules/archon/index.ts
+++ b/packages/api-client/src/modules/archon/index.ts
@@ -1,8 +1,8 @@
-export * from './actions/v1'
-export * from './backups/v1'
-export * from './backups-queue/v1'
-export * from './content/v1'
-export * from './properties/v1'
-export * from './servers/v0'
-export * from './servers/v1'
-export * from './types'
+export * from './actions/v1.js'
+export * from './backups/v1.js'
+export * from './backups-queue/v1.js'
+export * from './content/v1.js'
+export * from './properties/v1.js'
+export * from './servers/v0.js'
+export * from './servers/v1.js'
+export * from './types.js'
diff --git a/packages/api-client/src/modules/archon/nodes/internal.ts b/packages/api-client/src/modules/archon/nodes/internal.ts
index 254f392c8c..65d0824bbb 100644
--- a/packages/api-client/src/modules/archon/nodes/internal.ts
+++ b/packages/api-client/src/modules/archon/nodes/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 export class ArchonNodesInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/notices/v0.ts b/packages/api-client/src/modules/archon/notices/v0.ts
index a6e76b0277..805f8a7aef 100644
--- a/packages/api-client/src/modules/archon/notices/v0.ts
+++ b/packages/api-client/src/modules/archon/notices/v0.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 export class ArchonNoticesV0Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/options/v1.ts b/packages/api-client/src/modules/archon/options/v1.ts
index 00b978c22a..38103b6b9f 100644
--- a/packages/api-client/src/modules/archon/options/v1.ts
+++ b/packages/api-client/src/modules/archon/options/v1.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 export class ArchonOptionsV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/properties/v1.ts b/packages/api-client/src/modules/archon/properties/v1.ts
index d62fa911fd..ea34495adb 100644
--- a/packages/api-client/src/modules/archon/properties/v1.ts
+++ b/packages/api-client/src/modules/archon/properties/v1.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 export class ArchonPropertiesV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/server-users/v1.ts b/packages/api-client/src/modules/archon/server-users/v1.ts
index ef5a144d18..f62f52a794 100644
--- a/packages/api-client/src/modules/archon/server-users/v1.ts
+++ b/packages/api-client/src/modules/archon/server-users/v1.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 export class ArchonServerUsersV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/servers/v0.ts b/packages/api-client/src/modules/archon/servers/v0.ts
index 8a85532e21..e8321a0da9 100644
--- a/packages/api-client/src/modules/archon/servers/v0.ts
+++ b/packages/api-client/src/modules/archon/servers/v0.ts
@@ -1,6 +1,6 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { UploadHandle, UploadProgress } from '../../../types/upload'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { UploadHandle, UploadProgress } from '../../../types/upload.js'
+import type { Archon } from '../types.js'
 
 export class ArchonServersV0Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/servers/v1.ts b/packages/api-client/src/modules/archon/servers/v1.ts
index 9435bf11c7..271667022d 100644
--- a/packages/api-client/src/modules/archon/servers/v1.ts
+++ b/packages/api-client/src/modules/archon/servers/v1.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 export class ArchonServersV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/transfers/internal.ts b/packages/api-client/src/modules/archon/transfers/internal.ts
index ccbedaffd8..c95f4625b2 100644
--- a/packages/api-client/src/modules/archon/transfers/internal.ts
+++ b/packages/api-client/src/modules/archon/transfers/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Archon } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Archon } from '../types.js'
 
 export class ArchonTransfersInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/archon/types.ts b/packages/api-client/src/modules/archon/types.ts
index 7add0d5a84..0c7d86a278 100644
--- a/packages/api-client/src/modules/archon/types.ts
+++ b/packages/api-client/src/modules/archon/types.ts
@@ -1,4 +1,4 @@
-import type { Labrinth } from '../labrinth/types'
+import type { Labrinth } from '../labrinth/types.js'
 
 export namespace Archon {
 	export namespace Nodes {
diff --git a/packages/api-client/src/modules/index.ts b/packages/api-client/src/modules/index.ts
index e435d2f823..3813e90984 100644
--- a/packages/api-client/src/modules/index.ts
+++ b/packages/api-client/src/modules/index.ts
@@ -1,62 +1,62 @@
-import type { AbstractModrinthClient } from '../core/abstract-client'
-import type { AbstractModule } from '../core/abstract-module'
-import { ArchonActionsV1Module } from './archon/actions/v1'
-import { ArchonBackupsV1Module } from './archon/backups/v1'
-import { ArchonBackupsQueueV1Module } from './archon/backups-queue/v1'
-import { ArchonContentV1Module } from './archon/content/v1'
-import { ArchonNodesInternalModule } from './archon/nodes/internal'
-import { ArchonNoticesV0Module } from './archon/notices/v0'
-import { ArchonOptionsV1Module } from './archon/options/v1'
-import { ArchonPropertiesV1Module } from './archon/properties/v1'
-import { ArchonServerUsersV1Module } from './archon/server-users/v1'
-import { ArchonServersV0Module } from './archon/servers/v0'
-import { ArchonServersV1Module } from './archon/servers/v1'
-import { ArchonTransfersInternalModule } from './archon/transfers/internal'
-import { ISO3166Module } from './iso3166'
-import { KyrosContentV1Module } from './kyros/content/v1'
-import { KyrosFilesV0Module } from './kyros/files/v0'
-import { KyrosLogsV1Module } from './kyros/logs/v1'
-import { KyrosUploadSessionsV1Module } from './kyros/upload-sessions/v1'
-import { LabrinthVersionsV2Module, LabrinthVersionsV3Module } from './labrinth'
-import { LabrinthAffiliateInternalModule } from './labrinth/affiliate/internal'
-import { LabrinthAnalyticsV3Module } from './labrinth/analytics/v3'
-import { LabrinthAttributionInternalModule } from './labrinth/attribution/internal'
-import { LabrinthAuthInternalModule } from './labrinth/auth/internal'
-import { LabrinthAuthV2Module } from './labrinth/auth/v2'
-import { LabrinthBillingInternalModule } from './labrinth/billing/internal'
-import { LabrinthCampaignInternalModule } from './labrinth/campaign/internal'
-import { LabrinthCollectionsModule } from './labrinth/collections'
-import { LabrinthContentV3Module } from './labrinth/content/v3'
-import { LabrinthExternalProjectsInternalModule } from './labrinth/external-projects/internal'
-import { LabrinthFriendsV3Module } from './labrinth/friends/v3'
-import { LabrinthGlobalsInternalModule } from './labrinth/globals/internal'
-import { LabrinthImagesV3Module } from './labrinth/images/v3'
-import { LabrinthLimitsV3Module } from './labrinth/limits/v3'
-import { LabrinthModerationInternalModule } from './labrinth/moderation/internal'
-import { LabrinthNotificationsV2Module } from './labrinth/notifications/v2'
-import { LabrinthOAuthInternalModule } from './labrinth/oauth/internal'
-import { LabrinthOrganizationsV3Module } from './labrinth/organizations/v3'
-import { LabrinthPatsV2Module } from './labrinth/pats/v2'
-import { LabrinthPayoutV3Module } from './labrinth/payout/v3'
-import { LabrinthPayoutsV3Module } from './labrinth/payouts/v3'
-import { LabrinthProjectsV2Module } from './labrinth/projects/v2'
-import { LabrinthProjectsV3Module } from './labrinth/projects/v3'
-import { LabrinthReportsV3Module } from './labrinth/reports/v3'
-import { LabrinthServerPingInternalModule } from './labrinth/server-ping/internal'
-import { LabrinthSessionsV2Module } from './labrinth/sessions/v2'
-import { LabrinthStateModule } from './labrinth/state'
-import { LabrinthTagsV2Module } from './labrinth/tags/v2'
-import { LabrinthTeamsV2Module } from './labrinth/teams/v2'
-import { LabrinthTeamsV3Module } from './labrinth/teams/v3'
-import { LabrinthTechReviewInternalModule } from './labrinth/tech-review/internal'
-import { LabrinthThreadsV3Module } from './labrinth/threads/v3'
-import { LabrinthUsersV2Module } from './labrinth/users/v2'
-import { LabrinthUsersV3Module } from './labrinth/users/v3'
-import { LauncherMetaManifestV0Module } from './launcher-meta/v0'
-import { MclogsInsightsV1Module } from './mclogs/insights/v1'
-import { MclogsLogsV1Module } from './mclogs/logs/v1'
-import { PaperVersionsV3Module } from './paper/v3'
-import { PurpurVersionsV2Module } from './purpur/v2'
+import type { AbstractModrinthClient } from '../core/abstract-client.js'
+import type { AbstractModule } from '../core/abstract-module.js'
+import { ArchonActionsV1Module } from './archon/actions/v1.js'
+import { ArchonBackupsV1Module } from './archon/backups/v1.js'
+import { ArchonBackupsQueueV1Module } from './archon/backups-queue/v1.js'
+import { ArchonContentV1Module } from './archon/content/v1.js'
+import { ArchonNodesInternalModule } from './archon/nodes/internal.js'
+import { ArchonNoticesV0Module } from './archon/notices/v0.js'
+import { ArchonOptionsV1Module } from './archon/options/v1.js'
+import { ArchonPropertiesV1Module } from './archon/properties/v1.js'
+import { ArchonServerUsersV1Module } from './archon/server-users/v1.js'
+import { ArchonServersV0Module } from './archon/servers/v0.js'
+import { ArchonServersV1Module } from './archon/servers/v1.js'
+import { ArchonTransfersInternalModule } from './archon/transfers/internal.js'
+import { ISO3166Module } from './iso3166/index.js'
+import { KyrosContentV1Module } from './kyros/content/v1.js'
+import { KyrosFilesV0Module } from './kyros/files/v0.js'
+import { KyrosLogsV1Module } from './kyros/logs/v1.js'
+import { KyrosUploadSessionsV1Module } from './kyros/upload-sessions/v1.js'
+import { LabrinthAffiliateInternalModule } from './labrinth/affiliate/internal.js'
+import { LabrinthAnalyticsV3Module } from './labrinth/analytics/v3.js'
+import { LabrinthAttributionInternalModule } from './labrinth/attribution/internal.js'
+import { LabrinthAuthInternalModule } from './labrinth/auth/internal.js'
+import { LabrinthAuthV2Module } from './labrinth/auth/v2.js'
+import { LabrinthBillingInternalModule } from './labrinth/billing/internal.js'
+import { LabrinthCampaignInternalModule } from './labrinth/campaign/internal.js'
+import { LabrinthCollectionsModule } from './labrinth/collections.js'
+import { LabrinthContentV3Module } from './labrinth/content/v3.js'
+import { LabrinthExternalProjectsInternalModule } from './labrinth/external-projects/internal.js'
+import { LabrinthFriendsV3Module } from './labrinth/friends/v3.js'
+import { LabrinthGlobalsInternalModule } from './labrinth/globals/internal.js'
+import { LabrinthImagesV3Module } from './labrinth/images/v3.js'
+import { LabrinthVersionsV2Module, LabrinthVersionsV3Module } from './labrinth/index.js'
+import { LabrinthLimitsV3Module } from './labrinth/limits/v3.js'
+import { LabrinthModerationInternalModule } from './labrinth/moderation/internal.js'
+import { LabrinthNotificationsV2Module } from './labrinth/notifications/v2.js'
+import { LabrinthOAuthInternalModule } from './labrinth/oauth/internal.js'
+import { LabrinthOrganizationsV3Module } from './labrinth/organizations/v3.js'
+import { LabrinthPatsV2Module } from './labrinth/pats/v2.js'
+import { LabrinthPayoutV3Module } from './labrinth/payout/v3.js'
+import { LabrinthPayoutsV3Module } from './labrinth/payouts/v3.js'
+import { LabrinthProjectsV2Module } from './labrinth/projects/v2.js'
+import { LabrinthProjectsV3Module } from './labrinth/projects/v3.js'
+import { LabrinthReportsV3Module } from './labrinth/reports/v3.js'
+import { LabrinthServerPingInternalModule } from './labrinth/server-ping/internal.js'
+import { LabrinthSessionsV2Module } from './labrinth/sessions/v2.js'
+import { LabrinthStateModule } from './labrinth/state/index.js'
+import { LabrinthTagsV2Module } from './labrinth/tags/v2.js'
+import { LabrinthTeamsV2Module } from './labrinth/teams/v2.js'
+import { LabrinthTeamsV3Module } from './labrinth/teams/v3.js'
+import { LabrinthTechReviewInternalModule } from './labrinth/tech-review/internal.js'
+import { LabrinthThreadsV3Module } from './labrinth/threads/v3.js'
+import { LabrinthUsersV2Module } from './labrinth/users/v2.js'
+import { LabrinthUsersV3Module } from './labrinth/users/v3.js'
+import { LauncherMetaManifestV0Module } from './launcher-meta/v0.js'
+import { MclogsInsightsV1Module } from './mclogs/insights/v1.js'
+import { MclogsLogsV1Module } from './mclogs/logs/v1.js'
+import { PaperVersionsV3Module } from './paper/v3.js'
+import { PurpurVersionsV2Module } from './purpur/v2.js'
 
 type ModuleConstructor = new (client: AbstractModrinthClient) => AbstractModule
 
diff --git a/packages/api-client/src/modules/iso3166/index.ts b/packages/api-client/src/modules/iso3166/index.ts
index 741d657932..5e7b3fec15 100644
--- a/packages/api-client/src/modules/iso3166/index.ts
+++ b/packages/api-client/src/modules/iso3166/index.ts
@@ -1,9 +1,9 @@
 import { $fetch } from 'ofetch'
 
-import { AbstractModule } from '../../core/abstract-module'
-import type { ISO3166 } from './types'
+import { AbstractModule } from '../../core/abstract-module.js'
+import type { ISO3166 } from './types.js'
 
-export type { ISO3166 } from './types'
+export type { ISO3166 } from './types.js'
 
 const ISO3166_REPO = 'https://raw.githubusercontent.com/ipregistry/iso3166/master'
 
diff --git a/packages/api-client/src/modules/kyros/content/v1.ts b/packages/api-client/src/modules/kyros/content/v1.ts
index 9f5f4f8b16..2b8ba8ecf2 100644
--- a/packages/api-client/src/modules/kyros/content/v1.ts
+++ b/packages/api-client/src/modules/kyros/content/v1.ts
@@ -1,6 +1,6 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { UploadHandle, UploadProgress } from '../../../types/upload'
-import type { Archon } from '../../archon/types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { UploadHandle, UploadProgress } from '../../../types/upload.js'
+import type { Archon } from '../../archon/types.js'
 
 export class KyrosContentV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/kyros/files/v0.ts b/packages/api-client/src/modules/kyros/files/v0.ts
index b027294e33..5164f19db1 100644
--- a/packages/api-client/src/modules/kyros/files/v0.ts
+++ b/packages/api-client/src/modules/kyros/files/v0.ts
@@ -1,8 +1,8 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { UploadHandle, UploadProgress } from '../../../types/upload'
-import { getNodeBaseUrl } from '../../../utils/node-url'
-import type { Archon } from '../../archon/types'
-import type { Kyros } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { UploadHandle, UploadProgress } from '../../../types/upload.js'
+import { getNodeBaseUrl } from '../../../utils/node-url.js'
+import type { Archon } from '../../archon/types.js'
+import type { Kyros } from '../types.js'
 
 type NodeFsAuth = Pick<Archon.Servers.v0.JWTAuth, 'url' | 'token'>
 
diff --git a/packages/api-client/src/modules/kyros/logs/v1.ts b/packages/api-client/src/modules/kyros/logs/v1.ts
index 01e4cc237a..2cd18a5be1 100644
--- a/packages/api-client/src/modules/kyros/logs/v1.ts
+++ b/packages/api-client/src/modules/kyros/logs/v1.ts
@@ -1,4 +1,4 @@
-import { AbstractModule } from '../../../core/abstract-module'
+import { AbstractModule } from '../../../core/abstract-module.js'
 
 export class KyrosLogsV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/kyros/upload-sessions/v1.ts b/packages/api-client/src/modules/kyros/upload-sessions/v1.ts
index d88d6dacc0..a4a3637311 100644
--- a/packages/api-client/src/modules/kyros/upload-sessions/v1.ts
+++ b/packages/api-client/src/modules/kyros/upload-sessions/v1.ts
@@ -1,6 +1,6 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { UploadHandle, UploadProgress } from '../../../types/upload'
-import type { Kyros } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { UploadHandle, UploadProgress } from '../../../types/upload.js'
+import type { Kyros } from '../types.js'
 
 export type UploadSessionFile = {
 	file: File | Blob
diff --git a/packages/api-client/src/modules/labrinth/affiliate/internal.ts b/packages/api-client/src/modules/labrinth/affiliate/internal.ts
index eb67812627..2e9b82fdf9 100644
--- a/packages/api-client/src/modules/labrinth/affiliate/internal.ts
+++ b/packages/api-client/src/modules/labrinth/affiliate/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthAffiliateInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/analytics/v3.ts b/packages/api-client/src/modules/labrinth/analytics/v3.ts
index ba93ca4ac8..06ff7fef00 100644
--- a/packages/api-client/src/modules/labrinth/analytics/v3.ts
+++ b/packages/api-client/src/modules/labrinth/analytics/v3.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthAnalyticsV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/attribution/internal.ts b/packages/api-client/src/modules/labrinth/attribution/internal.ts
index 1ee316ecf6..182c229998 100644
--- a/packages/api-client/src/modules/labrinth/attribution/internal.ts
+++ b/packages/api-client/src/modules/labrinth/attribution/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 const BASE62_CHARS = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
 
diff --git a/packages/api-client/src/modules/labrinth/auth/internal.ts b/packages/api-client/src/modules/labrinth/auth/internal.ts
index 6050c5432f..20578fbea1 100644
--- a/packages/api-client/src/modules/labrinth/auth/internal.ts
+++ b/packages/api-client/src/modules/labrinth/auth/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthAuthInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/auth/v2.ts b/packages/api-client/src/modules/labrinth/auth/v2.ts
index 0a21546231..3ce5091f91 100644
--- a/packages/api-client/src/modules/labrinth/auth/v2.ts
+++ b/packages/api-client/src/modules/labrinth/auth/v2.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthAuthV2Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/billing/internal.ts b/packages/api-client/src/modules/labrinth/billing/internal.ts
index fff2a6bfec..9537fe572e 100644
--- a/packages/api-client/src/modules/labrinth/billing/internal.ts
+++ b/packages/api-client/src/modules/labrinth/billing/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthBillingInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/campaign/internal.ts b/packages/api-client/src/modules/labrinth/campaign/internal.ts
index 4becefad6e..680775d578 100644
--- a/packages/api-client/src/modules/labrinth/campaign/internal.ts
+++ b/packages/api-client/src/modules/labrinth/campaign/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthCampaignInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/collections.ts b/packages/api-client/src/modules/labrinth/collections.ts
index d8e499bcc1..c9fe2121e2 100644
--- a/packages/api-client/src/modules/labrinth/collections.ts
+++ b/packages/api-client/src/modules/labrinth/collections.ts
@@ -1,5 +1,5 @@
 import { AbstractModule } from '../../core/abstract-module.js'
-import type { Labrinth } from '../types'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthCollectionsModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/content/v3.ts b/packages/api-client/src/modules/labrinth/content/v3.ts
index 57af987945..664958c13f 100644
--- a/packages/api-client/src/modules/labrinth/content/v3.ts
+++ b/packages/api-client/src/modules/labrinth/content/v3.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthContentV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/external-projects/internal.ts b/packages/api-client/src/modules/labrinth/external-projects/internal.ts
index 3f03b9bc83..fc0970e785 100644
--- a/packages/api-client/src/modules/labrinth/external-projects/internal.ts
+++ b/packages/api-client/src/modules/labrinth/external-projects/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthExternalProjectsInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/friends/v3.ts b/packages/api-client/src/modules/labrinth/friends/v3.ts
index d946880dc5..da76529981 100644
--- a/packages/api-client/src/modules/labrinth/friends/v3.ts
+++ b/packages/api-client/src/modules/labrinth/friends/v3.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthFriendsV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/globals/internal.ts b/packages/api-client/src/modules/labrinth/globals/internal.ts
index ddaee2dea2..e4077a9be2 100644
--- a/packages/api-client/src/modules/labrinth/globals/internal.ts
+++ b/packages/api-client/src/modules/labrinth/globals/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthGlobalsInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/images/v3.ts b/packages/api-client/src/modules/labrinth/images/v3.ts
index 7613f0debd..8a2fc24778 100644
--- a/packages/api-client/src/modules/labrinth/images/v3.ts
+++ b/packages/api-client/src/modules/labrinth/images/v3.ts
@@ -1,6 +1,6 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { UploadHandle } from '../../../types/upload'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { UploadHandle } from '../../../types/upload.js'
+import type { Labrinth } from '../types.js'
 
 function buildImageQueryParams(
 	ext: Labrinth.Images.v3.ImageExtension,
diff --git a/packages/api-client/src/modules/labrinth/index.ts b/packages/api-client/src/modules/labrinth/index.ts
index 38d23edd70..c659f1a349 100644
--- a/packages/api-client/src/modules/labrinth/index.ts
+++ b/packages/api-client/src/modules/labrinth/index.ts
@@ -1,31 +1,31 @@
-export * from './analytics/v3'
-export * from './attribution/internal'
-export * from './auth/internal'
-export * from './auth/v2'
-export * from './billing/internal'
-export * from './collections'
-export * from './content/v3'
-export * from './external-projects/internal'
-export * from './friends/v3'
-export * from './globals/internal'
-export * from './images/v3'
-export * from './limits/v3'
-export * from './moderation/internal'
-export * from './notifications/v2'
-export * from './oauth/internal'
-export * from './organizations/v3'
-export * from './pats/v2'
-export * from './payout/v3'
-export * from './payouts/v3'
-export * from './projects/v2'
-export * from './projects/v3'
-export * from './reports/v3'
-export * from './server-ping/internal'
-export * from './sessions/v2'
-export * from './state'
-export * from './tech-review/internal'
-export * from './threads/v3'
-export * from './users/v2'
-export * from './users/v3'
-export * from './versions/v2'
-export * from './versions/v3'
+export * from './analytics/v3.js'
+export * from './attribution/internal.js'
+export * from './auth/internal.js'
+export * from './auth/v2.js'
+export * from './billing/internal.js'
+export * from './collections.js'
+export * from './content/v3.js'
+export * from './external-projects/internal.js'
+export * from './friends/v3.js'
+export * from './globals/internal.js'
+export * from './images/v3.js'
+export * from './limits/v3.js'
+export * from './moderation/internal.js'
+export * from './notifications/v2.js'
+export * from './oauth/internal.js'
+export * from './organizations/v3.js'
+export * from './pats/v2.js'
+export * from './payout/v3.js'
+export * from './payouts/v3.js'
+export * from './projects/v2.js'
+export * from './projects/v3.js'
+export * from './reports/v3.js'
+export * from './server-ping/internal.js'
+export * from './sessions/v2.js'
+export * from './state/index.js'
+export * from './tech-review/internal.js'
+export * from './threads/v3.js'
+export * from './users/v2.js'
+export * from './users/v3.js'
+export * from './versions/v2.js'
+export * from './versions/v3.js'
diff --git a/packages/api-client/src/modules/labrinth/limits/v3.ts b/packages/api-client/src/modules/labrinth/limits/v3.ts
index b0be7f3a99..2dc06594fc 100644
--- a/packages/api-client/src/modules/labrinth/limits/v3.ts
+++ b/packages/api-client/src/modules/labrinth/limits/v3.ts
@@ -1,5 +1,5 @@
 import { AbstractModule } from '../../../core/abstract-module.js'
-import type { Labrinth } from '../types'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthLimitsV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/moderation/internal.ts b/packages/api-client/src/modules/labrinth/moderation/internal.ts
index 33328f9969..c5242c3f99 100644
--- a/packages/api-client/src/modules/labrinth/moderation/internal.ts
+++ b/packages/api-client/src/modules/labrinth/moderation/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthModerationInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/notifications/v2.ts b/packages/api-client/src/modules/labrinth/notifications/v2.ts
index 4318e08604..ef330d060a 100644
--- a/packages/api-client/src/modules/labrinth/notifications/v2.ts
+++ b/packages/api-client/src/modules/labrinth/notifications/v2.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthNotificationsV2Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/oauth/internal.ts b/packages/api-client/src/modules/labrinth/oauth/internal.ts
index 0b44186320..46af96cc43 100644
--- a/packages/api-client/src/modules/labrinth/oauth/internal.ts
+++ b/packages/api-client/src/modules/labrinth/oauth/internal.ts
@@ -1,6 +1,6 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { UploadHandle } from '../../../types/upload'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { UploadHandle } from '../../../types/upload.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthOAuthInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/organizations/v3.ts b/packages/api-client/src/modules/labrinth/organizations/v3.ts
index 304616024c..227629b6c2 100644
--- a/packages/api-client/src/modules/labrinth/organizations/v3.ts
+++ b/packages/api-client/src/modules/labrinth/organizations/v3.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthOrganizationsV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/pats/v2.ts b/packages/api-client/src/modules/labrinth/pats/v2.ts
index 0fe7fef1be..6fc8fd958d 100644
--- a/packages/api-client/src/modules/labrinth/pats/v2.ts
+++ b/packages/api-client/src/modules/labrinth/pats/v2.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthPatsV2Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/payout/v3.ts b/packages/api-client/src/modules/labrinth/payout/v3.ts
index 95275794b6..d6d1b647cc 100644
--- a/packages/api-client/src/modules/labrinth/payout/v3.ts
+++ b/packages/api-client/src/modules/labrinth/payout/v3.ts
@@ -1,6 +1,6 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Override, RawDecimal } from '../../../utils/types'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Override, RawDecimal } from '../../../utils/types.js'
+import type { Labrinth } from '../types.js'
 
 type RawPayoutBalance = Override<
 	Labrinth.Payout.v3.PayoutBalance,
diff --git a/packages/api-client/src/modules/labrinth/payouts/v3.ts b/packages/api-client/src/modules/labrinth/payouts/v3.ts
index 5e52d7d347..b39af86705 100644
--- a/packages/api-client/src/modules/labrinth/payouts/v3.ts
+++ b/packages/api-client/src/modules/labrinth/payouts/v3.ts
@@ -1,5 +1,5 @@
 import { AbstractModule } from '../../../core/abstract-module.js'
-import type { Labrinth } from '../types'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthPayoutsV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/projects/v2.ts b/packages/api-client/src/modules/labrinth/projects/v2.ts
index 62197d23ca..a4d4b703e7 100644
--- a/packages/api-client/src/modules/labrinth/projects/v2.ts
+++ b/packages/api-client/src/modules/labrinth/projects/v2.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthProjectsV2Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/projects/v3.ts b/packages/api-client/src/modules/labrinth/projects/v3.ts
index eb09712f83..41e873ef7f 100644
--- a/packages/api-client/src/modules/labrinth/projects/v3.ts
+++ b/packages/api-client/src/modules/labrinth/projects/v3.ts
@@ -1,6 +1,6 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import { ModrinthApiError } from '../../../core/errors'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import { ModrinthApiError } from '../../../core/errors.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthProjectsV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/reports/v3.ts b/packages/api-client/src/modules/labrinth/reports/v3.ts
index c702a00fbd..de3c378d40 100644
--- a/packages/api-client/src/modules/labrinth/reports/v3.ts
+++ b/packages/api-client/src/modules/labrinth/reports/v3.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthReportsV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/server-ping/internal.ts b/packages/api-client/src/modules/labrinth/server-ping/internal.ts
index c655eca439..e6b4af78fa 100644
--- a/packages/api-client/src/modules/labrinth/server-ping/internal.ts
+++ b/packages/api-client/src/modules/labrinth/server-ping/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthServerPingInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/sessions/v2.ts b/packages/api-client/src/modules/labrinth/sessions/v2.ts
index 7fd971e6a4..d206456d7d 100644
--- a/packages/api-client/src/modules/labrinth/sessions/v2.ts
+++ b/packages/api-client/src/modules/labrinth/sessions/v2.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthSessionsV2Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/state/index.ts b/packages/api-client/src/modules/labrinth/state/index.ts
index f82f36c737..65edd91d37 100644
--- a/packages/api-client/src/modules/labrinth/state/index.ts
+++ b/packages/api-client/src/modules/labrinth/state/index.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthStateModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/tags/v2.ts b/packages/api-client/src/modules/labrinth/tags/v2.ts
index f66c6edda6..ba7c16bc79 100644
--- a/packages/api-client/src/modules/labrinth/tags/v2.ts
+++ b/packages/api-client/src/modules/labrinth/tags/v2.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthTagsV2Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/teams/v2.ts b/packages/api-client/src/modules/labrinth/teams/v2.ts
index bbc2e6c52a..8631ff39b3 100644
--- a/packages/api-client/src/modules/labrinth/teams/v2.ts
+++ b/packages/api-client/src/modules/labrinth/teams/v2.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthTeamsV2Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/teams/v3.ts b/packages/api-client/src/modules/labrinth/teams/v3.ts
index 69347842d9..bcc4238096 100644
--- a/packages/api-client/src/modules/labrinth/teams/v3.ts
+++ b/packages/api-client/src/modules/labrinth/teams/v3.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthTeamsV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/tech-review/internal.ts b/packages/api-client/src/modules/labrinth/tech-review/internal.ts
index e0a02c70b0..765e322a1f 100644
--- a/packages/api-client/src/modules/labrinth/tech-review/internal.ts
+++ b/packages/api-client/src/modules/labrinth/tech-review/internal.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthTechReviewInternalModule extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/threads/v3.ts b/packages/api-client/src/modules/labrinth/threads/v3.ts
index 52c9c436c6..2bbcf4fd84 100644
--- a/packages/api-client/src/modules/labrinth/threads/v3.ts
+++ b/packages/api-client/src/modules/labrinth/threads/v3.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthThreadsV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/types.ts b/packages/api-client/src/modules/labrinth/types.ts
index c7e8da75fb..c05681d9c0 100644
--- a/packages/api-client/src/modules/labrinth/types.ts
+++ b/packages/api-client/src/modules/labrinth/types.ts
@@ -1,5 +1,5 @@
-import type { RawDecimal } from '../../utils/types'
-import type { ISO3166 } from '../iso3166/types'
+import type { RawDecimal } from '../../utils/types.js'
+import type { ISO3166 } from '../iso3166/types.js'
 
 export namespace Labrinth {
 	export namespace Content {
diff --git a/packages/api-client/src/modules/labrinth/users/v2.ts b/packages/api-client/src/modules/labrinth/users/v2.ts
index 2f2cafdef0..e7f3cbcaae 100644
--- a/packages/api-client/src/modules/labrinth/users/v2.ts
+++ b/packages/api-client/src/modules/labrinth/users/v2.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthUsersV2Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/users/v3.ts b/packages/api-client/src/modules/labrinth/users/v3.ts
index 90dfced927..47cbc1c5c4 100644
--- a/packages/api-client/src/modules/labrinth/users/v3.ts
+++ b/packages/api-client/src/modules/labrinth/users/v3.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthUsersV3Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/versions/v2.ts b/packages/api-client/src/modules/labrinth/versions/v2.ts
index 8c9df4083d..c6157b8de7 100644
--- a/packages/api-client/src/modules/labrinth/versions/v2.ts
+++ b/packages/api-client/src/modules/labrinth/versions/v2.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Labrinth } from '../types.js'
 
 export class LabrinthVersionsV2Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/labrinth/versions/v3.ts b/packages/api-client/src/modules/labrinth/versions/v3.ts
index a80710757a..c899b35c2d 100644
--- a/packages/api-client/src/modules/labrinth/versions/v3.ts
+++ b/packages/api-client/src/modules/labrinth/versions/v3.ts
@@ -1,6 +1,6 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { UploadHandle } from '../../../types/upload'
-import type { Labrinth } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { UploadHandle } from '../../../types/upload.js'
+import type { Labrinth } from '../types.js'
 
 const VERSION_UPLOAD_TIMEOUT_MS = 30 * 60 * 1000
 
diff --git a/packages/api-client/src/modules/launcher-meta/v0.ts b/packages/api-client/src/modules/launcher-meta/v0.ts
index f4d6ff0e3b..43d787cfc7 100644
--- a/packages/api-client/src/modules/launcher-meta/v0.ts
+++ b/packages/api-client/src/modules/launcher-meta/v0.ts
@@ -1,7 +1,7 @@
-import { AbstractModule } from '../../core/abstract-module'
-import type { LauncherMeta } from './types'
+import { AbstractModule } from '../../core/abstract-module.js'
+import type { LauncherMeta } from './types.js'
 
-export type { LauncherMeta } from './types'
+export type { LauncherMeta } from './types.js'
 
 const LAUNCHER_META_BASE_URL = 'https://launcher-meta.modrinth.com'
 
diff --git a/packages/api-client/src/modules/mclogs/insights/v1.ts b/packages/api-client/src/modules/mclogs/insights/v1.ts
index 26a4b7bfd0..00ce16b0cd 100644
--- a/packages/api-client/src/modules/mclogs/insights/v1.ts
+++ b/packages/api-client/src/modules/mclogs/insights/v1.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Mclogs } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Mclogs } from '../types.js'
 
 export class MclogsInsightsV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/mclogs/logs/v1.ts b/packages/api-client/src/modules/mclogs/logs/v1.ts
index b3179d6a58..fdaa37b826 100644
--- a/packages/api-client/src/modules/mclogs/logs/v1.ts
+++ b/packages/api-client/src/modules/mclogs/logs/v1.ts
@@ -1,5 +1,5 @@
-import { AbstractModule } from '../../../core/abstract-module'
-import type { Mclogs } from '../types'
+import { AbstractModule } from '../../../core/abstract-module.js'
+import type { Mclogs } from '../types.js'
 
 export class MclogsLogsV1Module extends AbstractModule {
 	public getModuleID(): string {
diff --git a/packages/api-client/src/modules/paper/v3.ts b/packages/api-client/src/modules/paper/v3.ts
index 57aec48178..59d030ff38 100644
--- a/packages/api-client/src/modules/paper/v3.ts
+++ b/packages/api-client/src/modules/paper/v3.ts
@@ -1,7 +1,7 @@
-import { AbstractModule } from '../../core/abstract-module'
-import type { Paper } from './types'
+import { AbstractModule } from '../../core/abstract-module.js'
+import type { Paper } from './types.js'
 
-export type { Paper } from './types'
+export type { Paper } from './types.js'
 
 const PAPER_BASE_URL = 'https://fill.papermc.io'
 
diff --git a/packages/api-client/src/modules/purpur/v2.ts b/packages/api-client/src/modules/purpur/v2.ts
index a4a566cabe..26c3144487 100644
--- a/packages/api-client/src/modules/purpur/v2.ts
+++ b/packages/api-client/src/modules/purpur/v2.ts
@@ -1,7 +1,7 @@
-import { AbstractModule } from '../../core/abstract-module'
-import type { Purpur } from './types'
+import { AbstractModule } from '../../core/abstract-module.js'
+import type { Purpur } from './types.js'
 
-export type { Purpur } from './types'
+export type { Purpur } from './types.js'
 
 const PURPUR_BASE_URL = 'https://api.purpurmc.org'
 
diff --git a/packages/api-client/src/modules/types.ts b/packages/api-client/src/modules/types.ts
index d86e87723d..24f2ab23d8 100644
--- a/packages/api-client/src/modules/types.ts
+++ b/packages/api-client/src/modules/types.ts
@@ -1,8 +1,8 @@
-export * from './archon/types'
-export * from './iso3166/types'
-export * from './kyros/types'
-export * from './labrinth/types'
-export * from './launcher-meta/types'
-export * from './mclogs/types'
-export * from './paper/types'
-export * from './purpur/types'
+export * from './archon/types.js'
+export * from './iso3166/types.js'
+export * from './kyros/types.js'
+export * from './labrinth/types.js'
+export * from './launcher-meta/types.js'
+export * from './mclogs/types.js'
+export * from './paper/types.js'
+export * from './purpur/types.js'
diff --git a/packages/api-client/src/platform/generic.ts b/packages/api-client/src/platform/generic.ts
index 7ec63b6824..26cd57d9a9 100644
--- a/packages/api-client/src/platform/generic.ts
+++ b/packages/api-client/src/platform/generic.ts
@@ -1,12 +1,12 @@
 import { $fetch, FetchError } from 'ofetch'
 
-import { ModrinthApiError } from '../core/errors'
-import type { ClientConfig } from '../types/client'
-import type { RequestOptions } from '../types/request'
-import { appendRequestParams, parseResponseErrorData, toFetchBody } from '../utils/fetch'
-import { GenericSyncClient } from './sync-generic'
-import { GenericWebSocketClient } from './websocket-generic'
-import { XHRUploadClient } from './xhr-upload-client'
+import { ModrinthApiError } from '../core/errors.js'
+import type { ClientConfig } from '../types/client.js'
+import type { RequestOptions } from '../types/request.js'
+import { appendRequestParams, parseResponseErrorData, toFetchBody } from '../utils/fetch.js'
+import { GenericSyncClient } from './sync-generic.js'
+import { GenericWebSocketClient } from './websocket-generic.js'
+import { XHRUploadClient } from './xhr-upload-client.js'
 
 /**
  * Generic platform client using ofetch
diff --git a/packages/api-client/src/platform/nuxt.ts b/packages/api-client/src/platform/nuxt.ts
index a5308535ba..0d2dfe0503 100644
--- a/packages/api-client/src/platform/nuxt.ts
+++ b/packages/api-client/src/platform/nuxt.ts
@@ -1,14 +1,14 @@
 import { FetchError } from 'ofetch'
 
-import { ModrinthApiError } from '../core/errors'
-import type { CircuitBreakerState, CircuitBreakerStorage } from '../features/circuit-breaker'
-import type { ClientConfig } from '../types/client'
-import type { RequestOptions } from '../types/request'
-import type { UploadHandle, UploadRequestOptions } from '../types/upload'
-import { appendRequestParams, parseResponseErrorData, toFetchBody } from '../utils/fetch'
-import { GenericSyncClient } from './sync-generic'
-import { GenericWebSocketClient } from './websocket-generic'
-import { XHRUploadClient } from './xhr-upload-client'
+import { ModrinthApiError } from '../core/errors.js'
+import type { CircuitBreakerState, CircuitBreakerStorage } from '../features/circuit-breaker.js'
+import type { ClientConfig } from '../types/client.js'
+import type { RequestOptions } from '../types/request.js'
+import type { UploadHandle, UploadRequestOptions } from '../types/upload.js'
+import { appendRequestParams, parseResponseErrorData, toFetchBody } from '../utils/fetch.js'
+import { GenericSyncClient } from './sync-generic.js'
+import { GenericWebSocketClient } from './websocket-generic.js'
+import { XHRUploadClient } from './xhr-upload-client.js'
 
 /**
  * Circuit breaker storage using Nuxt's useState
diff --git a/packages/api-client/src/platform/sync-generic.ts b/packages/api-client/src/platform/sync-generic.ts
index e43fbaf2da..7136e2c785 100644
--- a/packages/api-client/src/platform/sync-generic.ts
+++ b/packages/api-client/src/platform/sync-generic.ts
@@ -5,9 +5,9 @@ import {
 	type SyncConnection,
 	type SyncConnectOptions,
 	type SyncEmitterEvents,
-} from '../core/abstract-sync'
-import type { Archon } from '../modules/archon/types'
-import { type ParsedSseItem, parseSyncEventData, SseParser } from '../utils/sse'
+} from '../core/abstract-sync.js'
+import type { Archon } from '../modules/archon/types.js'
+import { type ParsedSseItem, parseSyncEventData, SseParser } from '../utils/sse.js'
 
 type StreamReadResult = 'closed' | 'protocol-reconnect'
 
diff --git a/packages/api-client/src/platform/tauri.ts b/packages/api-client/src/platform/tauri.ts
index ac82b53edb..84372d5b7b 100644
--- a/packages/api-client/src/platform/tauri.ts
+++ b/packages/api-client/src/platform/tauri.ts
@@ -1,10 +1,10 @@
-import type { ModrinthApiError } from '../core/errors'
-import type { ClientConfig } from '../types/client'
-import type { RequestOptions } from '../types/request'
-import { appendRequestParams, parseResponseErrorData, toFetchBody } from '../utils/fetch'
-import { GenericSyncClient } from './sync-generic'
-import { GenericWebSocketClient } from './websocket-generic'
-import { XHRUploadClient } from './xhr-upload-client'
+import type { ModrinthApiError } from '../core/errors.js'
+import type { ClientConfig } from '../types/client.js'
+import type { RequestOptions } from '../types/request.js'
+import { appendRequestParams, parseResponseErrorData, toFetchBody } from '../utils/fetch.js'
+import { GenericSyncClient } from './sync-generic.js'
+import { GenericWebSocketClient } from './websocket-generic.js'
+import { XHRUploadClient } from './xhr-upload-client.js'
 
 /**
  * Tauri-specific configuration
diff --git a/packages/api-client/src/platform/websocket-generic.ts b/packages/api-client/src/platform/websocket-generic.ts
index 19aa098f45..093d450cfe 100644
--- a/packages/api-client/src/platform/websocket-generic.ts
+++ b/packages/api-client/src/platform/websocket-generic.ts
@@ -1,8 +1,8 @@
 import mitt from 'mitt'
 
-import { AbstractWebSocketClient, type WebSocketConnection } from '../core/abstract-websocket'
-import type { Archon } from '../modules/archon/types'
-import { getNodeWebSocketUrl } from '../utils/node-url'
+import { AbstractWebSocketClient, type WebSocketConnection } from '../core/abstract-websocket.js'
+import type { Archon } from '../modules/archon/types.js'
+import { getNodeWebSocketUrl } from '../utils/node-url.js'
 
 type WSEventMap = {
 	[K in Archon.Websocket.v0.WSEvent as `${string}:${K['event']}`]: K
diff --git a/packages/api-client/src/platform/xhr-upload-client.ts b/packages/api-client/src/platform/xhr-upload-client.ts
index 7d6016d5b9..dfd5066814 100644
--- a/packages/api-client/src/platform/xhr-upload-client.ts
+++ b/packages/api-client/src/platform/xhr-upload-client.ts
@@ -1,12 +1,12 @@
-import { AbstractModrinthClient } from '../core/abstract-client'
-import { ModrinthApiError } from '../core/errors'
-import type { RequestContext } from '../types/request'
+import { AbstractModrinthClient } from '../core/abstract-client.js'
+import { ModrinthApiError } from '../core/errors.js'
+import type { RequestContext } from '../types/request.js'
 import type {
 	UploadHandle,
 	UploadMetadata,
 	UploadProgress,
 	UploadRequestOptions,
-} from '../types/upload'
+} from '../types/upload.js'
 
 /**
  * Abstract client with XHR-based upload implementation
diff --git a/packages/api-client/src/state/node-auth.ts b/packages/api-client/src/state/node-auth.ts
index 1bd833b53b..9466f63f81 100644
--- a/packages/api-client/src/state/node-auth.ts
+++ b/packages/api-client/src/state/node-auth.ts
@@ -1,4 +1,4 @@
-import type { NodeAuth } from '../features/node-auth'
+import type { NodeAuth } from '../features/node-auth.js'
 
 /**
  * Global node auth state.
diff --git a/packages/api-client/src/types/client.ts b/packages/api-client/src/types/client.ts
index 57d33105ef..a70fd3c2a6 100644
--- a/packages/api-client/src/types/client.ts
+++ b/packages/api-client/src/types/client.ts
@@ -1,5 +1,5 @@
-import type { AbstractFeature } from '../core/abstract-feature'
-import type { RequestContext } from './request'
+import type { AbstractFeature } from '../core/abstract-feature.js'
+import type { RequestContext } from './request.js'
 
 export type MaybePromise<T> = T | Promise<T>
 export type UserAgentProvider = string | (() => MaybePromise<string | undefined>)
diff --git a/packages/api-client/src/types/index.ts b/packages/api-client/src/types/index.ts
index 2fb40b14e4..43c439232c 100644
--- a/packages/api-client/src/types/index.ts
+++ b/packages/api-client/src/types/index.ts
@@ -1,20 +1,20 @@
-export type { FeatureConfig } from '../core/abstract-feature'
-export type { AuthConfig } from '../features/auth'
+export type { FeatureConfig } from '../core/abstract-feature.js'
+export type { AuthConfig } from '../features/auth.js'
 export type {
 	CircuitBreakerConfig,
 	CircuitBreakerState,
 	CircuitBreakerStorage,
-} from '../features/circuit-breaker'
-export type { BackoffStrategy, RetryConfig } from '../features/retry'
-export type { Archon } from '../modules/archon/types'
-export type { BaseUrlConfig, ClientConfig, RequestHooks } from './client'
-export type { ApiErrorData, ModrinthErrorResponse } from './errors'
-export { isModrinthErrorResponse } from './errors'
-export type { HttpMethod, RequestContext, RequestOptions, ResponseData } from './request'
+} from '../features/circuit-breaker.js'
+export type { BackoffStrategy, RetryConfig } from '../features/retry.js'
+export type { Archon } from '../modules/archon/types.js'
+export type { BaseUrlConfig, ClientConfig, RequestHooks } from './client.js'
+export type { ApiErrorData, ModrinthErrorResponse } from './errors.js'
+export { isModrinthErrorResponse } from './errors.js'
+export type { HttpMethod, RequestContext, RequestOptions, ResponseData } from './request.js'
 export type {
 	UploadHandle,
 	UploadMetadata,
 	UploadProgress,
 	UploadRequestOptions,
 	UploadState,
-} from './upload'
+} from './upload.js'
diff --git a/packages/api-client/src/types/upload.ts b/packages/api-client/src/types/upload.ts
index 61e50dc94d..eb1d557f9b 100644
--- a/packages/api-client/src/types/upload.ts
+++ b/packages/api-client/src/types/upload.ts
@@ -1,4 +1,4 @@
-import type { RequestOptions } from './request'
+import type { RequestOptions } from './request.js'
 
 /**
  * Progress information for file uploads
diff --git a/packages/api-client/src/utils/fetch.ts b/packages/api-client/src/utils/fetch.ts
index 9ab9c7ab0a..0fc24f121e 100644
--- a/packages/api-client/src/utils/fetch.ts
+++ b/packages/api-client/src/utils/fetch.ts
@@ -1,4 +1,4 @@
-import type { RequestOptions } from '../types/request'
+import type { RequestOptions } from '../types/request.js'
 
 export function appendRequestParams(url: string, params?: RequestOptions['params']): string {
 	if (!params) return url
diff --git a/packages/api-client/src/utils/jwt-retry.ts b/packages/api-client/src/utils/jwt-retry.ts
index 1ae0817bfc..d27de6b09c 100644
--- a/packages/api-client/src/utils/jwt-retry.ts
+++ b/packages/api-client/src/utils/jwt-retry.ts
@@ -1,4 +1,4 @@
-import { ModrinthApiError } from '../core/errors'
+import { ModrinthApiError } from '../core/errors.js'
 
 /**
  * Wrap a function with JWT retry logic.
diff --git a/packages/api-client/src/utils/sse.ts b/packages/api-client/src/utils/sse.ts
index 8497196875..5135518213 100644
--- a/packages/api-client/src/utils/sse.ts
+++ b/packages/api-client/src/utils/sse.ts
@@ -1,4 +1,4 @@
-import type { Archon } from '../modules/archon/types'
+import type { Archon } from '../modules/archon/types.js'
 
 export type ParsedSseEvent = {
 	kind: 'event'
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e5551e7046..66683547b3 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -462,6 +462,9 @@ importers:
       esbuild:
         specifier: 0.27.2
         version: 0.27.2
+      eslint-plugin-n:
+        specifier: ^18.2.1
+        version: 18.2.1(eslint@9.39.2(jiti@2.6.1))(typescript@5.9.3)
       typescript:
         specifier: ^5.9.3
         version: 5.9.3
@@ -5937,6 +5940,12 @@ packages:
     resolution: {integrity: sha512-/veY75JbMK4j1yjvuUxuVsiS/hr/4iHs9FTT6cgTexxdE0Ly/glccBAkloH/DofkjRbZU3bnoj38mOmhkZ0lHw==}
     engines: {node: '>=12'}
 
+  eslint-compat-utils@0.5.1:
+    resolution: {integrity: sha512-3z3vFexKIEnjHE3zCMRo6fn/e44U7T1khUjg+Hp0ZQMCigh28rALD0nPFBcGZuiLC5rLZa2ubQHDRln09JfU2Q==}
+    engines: {node: '>=12'}
+    peerDependencies:
+      eslint: '>=6.0.0'
+
   eslint-config-flat-gitignore@0.3.0:
     resolution: {integrity: sha512-0Ndxo4qGhcewjTzw52TK06Mc00aDtHNTdeeW2JfONgDcLkRO/n/BteMRzNVpLQYxdCC/dFEilfM9fjjpGIJ9Og==}
     peerDependencies:
@@ -5960,6 +5969,12 @@ packages:
       unrs-resolver:
         optional: true
 
+  eslint-plugin-es-x@7.8.0:
+    resolution: {integrity: sha512-7Ds8+wAAoV3T+LAKeu39Y5BzXCrGKrcISfgKEqTS4BDN8SFEDQd0S43jiQ8vIa3wUKD07qitZdfzlenSi8/0qQ==}
+    engines: {node: ^14.18.0 || >=16.0.0}
+    peerDependencies:
+      eslint: '>=8'
+
   eslint-plugin-import-x@4.16.1:
     resolution: {integrity: sha512-vPZZsiOKaBAIATpFE2uMI4w5IRwdv/FpQ+qZZMR4E+PeOcM4OeoEbqxRMnywdxP19TyB/3h6QBB0EWon7letSQ==}
     engines: {node: ^18.18.0 || ^20.9.0 || >=21.1.0}
@@ -5979,6 +5994,19 @@ packages:
     peerDependencies:
       eslint: ^7.0.0 || ^8.0.0 || ^9.0.0
 
+  eslint-plugin-n@18.2.1:
+    resolution: {integrity: sha512-aO3C9//yq8JIvYOi/T+jPvcZ9hZzpwzbR8esrYpFtgE9vpbyM8kn42AQOtIqYspVmpaSWr8X+nrlQuAJYxXAaw==}
+    engines: {node: ^20.19.0 || ^22.13.0 || >=24}
+    peerDependencies:
+      eslint: '>=8.57.1'
+      ts-declaration-location: ^1.0.6
+      typescript: '>=5.0.0'
+    peerDependenciesMeta:
+      ts-declaration-location:
+        optional: true
+      typescript:
+        optional: true
+
   eslint-plugin-prettier@5.5.5:
     resolution: {integrity: sha512-hscXkbqUZ2sPithAuLm5MXL+Wph+U7wHngPBv9OMWwlP8iaflyxpjTYZkmdgB4/vPIhemRlBEoLrH7UC1n7aUw==}
     engines: {node: ^14.18.0 || >=16.0.0}
@@ -6410,6 +6438,9 @@ packages:
     resolution: {integrity: sha512-+A4Hq7m7Ze592k9gZRy4gJ27DrXRNnC1vPjxTt1qQxEY8RxagBkBxivkCwg7FxSTG0iLLEMaUx13oOr0R2/qcQ==}
     engines: {node: '>=20'}
 
+  globrex@0.1.2:
+    resolution: {integrity: sha512-uHJgbwAMwNFf5mLst7IWLNg14x1CkeqglJb/K3doi4dw6q2IvAAmM/Y81kevy83wP+Sst+nutFTYOGg3d1lsxg==}
+
   glsl-token-functions@1.0.1:
     resolution: {integrity: sha512-EigGhp1g+aUVeUNY7H1o5tL/bnwIB3/FcRREPr2E7Du+/UDXN24hDkaZ3e4aWHDjHr9lJ6YHXMISkwhUYg9UOg==}
 
@@ -9804,8 +9835,8 @@ packages:
   vue-component-type-helpers@3.2.4:
     resolution: {integrity: sha512-05lR16HeZDcDpB23ku5b5f1fBOoHqFnMiKRr2CiEvbG5Ux4Yi0McmQBOET0dR0nxDXosxyVqv67q6CzS3AK8rw==}
 
-  vue-component-type-helpers@3.3.3:
-    resolution: {integrity: sha512-x4nsFpy5Pe8fqPzp/5vkTPeTTDBpAx4WVtV47Ejt0+2FQrq4pRRsJs7JmYRqMFzTu/LW+pCWEjQ3YVCkPV7f9g==}
+  vue-component-type-helpers@3.3.5:
+    resolution: {integrity: sha512-Fe1jyPJoUGpJOYKOri44jduR7My4yYINOMJISuMAbmrs+L5LbIDUc8NTWZYY3EJLK0yPLuCmcd5zoCsE4k2/KA==}
 
   vue-confetti-explosion@1.0.2:
     resolution: {integrity: sha512-80OboM3/6BItIoZ6DpNcZFqGpF607kjIVc5af56oKgtFmt5yWehvJeoYhkzYlqxrqdBe0Ko4Ie3bWrmLau+dJw==}
@@ -13243,7 +13274,7 @@ snapshots:
       storybook: 10.2.4(@testing-library/dom@10.4.1)(prettier@3.8.1)(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
       type-fest: 2.19.0
       vue: 3.5.27(typescript@5.9.3)
-      vue-component-type-helpers: 3.3.3
+      vue-component-type-helpers: 3.3.5
 
   '@stripe/stripe-js@7.9.0': {}
 
@@ -15500,6 +15531,11 @@ snapshots:
 
   escape-string-regexp@5.0.0: {}
 
+  eslint-compat-utils@0.5.1(eslint@9.39.2(jiti@2.6.1)):
+    dependencies:
+      eslint: 9.39.2(jiti@2.6.1)
+      semver: 7.7.4
+
   eslint-config-flat-gitignore@0.3.0(eslint@9.39.2(jiti@1.21.7)):
     dependencies:
       '@eslint/compat': 1.4.1(eslint@9.39.2(jiti@1.21.7))
@@ -15527,6 +15563,13 @@ snapshots:
     optionalDependencies:
       unrs-resolver: 1.11.1
 
+  eslint-plugin-es-x@7.8.0(eslint@9.39.2(jiti@2.6.1)):
+    dependencies:
+      '@eslint-community/eslint-utils': 4.9.1(eslint@9.39.2(jiti@2.6.1))
+      '@eslint-community/regexpp': 4.12.2
+      eslint: 9.39.2(jiti@2.6.1)
+      eslint-compat-utils: 0.5.1(eslint@9.39.2(jiti@2.6.1))
+
   eslint-plugin-import-x@4.16.1(@typescript-eslint/utils@8.54.0(eslint@9.39.2(jiti@1.21.7))(typescript@5.9.3))(eslint@9.39.2(jiti@1.21.7)):
     dependencies:
       '@typescript-eslint/types': 8.54.0
@@ -15593,6 +15636,20 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
+  eslint-plugin-n@18.2.1(eslint@9.39.2(jiti@2.6.1))(typescript@5.9.3):
+    dependencies:
+      '@eslint-community/eslint-utils': 4.9.1(eslint@9.39.2(jiti@2.6.1))
+      enhanced-resolve: 5.19.0
+      eslint: 9.39.2(jiti@2.6.1)
+      eslint-plugin-es-x: 7.8.0(eslint@9.39.2(jiti@2.6.1))
+      get-tsconfig: 4.13.1
+      globals: 15.15.0
+      globrex: 0.1.2
+      ignore: 5.3.2
+      semver: 7.7.4
+    optionalDependencies:
+      typescript: 5.9.3
+
   eslint-plugin-prettier@5.5.5(eslint-config-prettier@10.1.8(eslint@9.39.2(jiti@2.6.1)))(eslint@9.39.2(jiti@2.6.1))(prettier@3.8.1):
     dependencies:
       eslint: 9.39.2(jiti@2.6.1)
@@ -16178,6 +16235,8 @@ snapshots:
       slash: 5.1.0
       unicorn-magic: 0.4.0
 
+  globrex@0.1.2: {}
+
   glsl-token-functions@1.0.1: {}
 
   glsl-token-string@1.0.1: {}
@@ -20292,7 +20351,7 @@ snapshots:
 
   vue-component-type-helpers@3.2.4: {}
 
-  vue-component-type-helpers@3.3.3: {}
+  vue-component-type-helpers@3.3.5: {}
 
   vue-confetti-explosion@1.0.2(vue@3.5.27(typescript@5.9.3)):
     dependencies: