Enums and types

Public types live under src/types/. The barrel src/types/index.ts re-exports them; the package's index.ts re-exports the barrel.

Const enum maps

Object	Values
Loaders	VANILLA FABRIC FORGE
MinecraftChannels	RELEASE SNAPSHOT OLD_BETA OLD_ALPHA
VersionPreference	LATEST RECOMMENDED
RuntimePreference	RECOMMENDED LATEST
RuntimeComponents	JRE_LEGACY JAVA_RUNTIME_GAMMA JAVA_RUNTIME_DELTA …
VerificationKinds	MINECRAFT FABRIC FORGE RUNTIME
VerifyFileStatuses	OK MISSING CORRUPT WRONG_SIZE
VerifyFileCategories	CLIENT_JAR LIBRARY ASSET ASSET_INDEX NATIVE LOADER_LIBRARY RUNTIME_FILE LOGGING_CONFIG
InstallPhases	PLANNING DOWNLOADING_LIBRARIES WRITING_FILES EXTRACTING_NATIVES INSTALLING_RUNTIME RUNNING_FORGE_PROCESSORS COMPLETED …
InstallActionKinds	DOWNLOAD_FILE EXTRACT_NATIVE RUN_FORGE_PROCESSOR WRITE_VERSION_JSON WRITE_LOGGING_CONFIG
EventTypes	One literal per ProgressEvent.type
AuthModes	OFFLINE ONLINE
LogLevels	DEBUG INFO WARN ERROR

import { Loaders, EventTypes, VerificationKinds } from "@loontail/minecraft-kit";

if (target.loader.type === Loaders.FABRIC) { /* narrows */ }

const result = await kit.verify.minecraft.run(target);
if (result.kind === VerificationKinds.MINECRAFT) { /* narrows */ }

Discriminated unions

Union	Discriminator
Loader	type: Loaders.*
InstallAction	kind: InstallActionKinds.*
ProgressEvent	type: EventTypes.* (string literal)

A switch on the discriminator gives you exhaustiveness checking — TypeScript will tell you if you forgot a case.

The API reference has the full shape of every interface and field.