import { IMigrationDescriptor, IModelDescriptor } from "./interfaces.js";
export declare function createDefaultModelDescriptor(): IModelDescriptor;
export declare function extractModelDescriptorInherited(targetOrForward: any): IModelDescriptor | null;
export declare function extractModelDescriptor(targetOrForward: any): IModelDescriptor | null;
/**
 * The one `MIGRATION_DESCRIPTION_SYMBOL` cast, shared by every reader instead of repeated at each
 * call site (`orm.ts`, `migration-sources.ts`, `migration-runner.ts` each used to carry their own
 * copy). Unlike a model's descriptor - written with `Reflect.getOwnMetadata`, own-per-class by
 * construction - `@Migration()` writes this one as a plain property, which the prototype chain
 * resolves through automatically: reading it off a subclass that carries no `@Migration()` of its
 * own returns its nearest decorated ANCESTOR's descriptor.
 *
 * That is exactly what `MigrationRunner.plan()` wants for `Connection` - a subclass is still the
 * same migration on the same connection whether or not it re-declares `@Migration()` - so this
 * chain-walking read is the correct one there, and for `DiRegistryMigrationSource` ( whose entries
 * are, by construction, only ever classes `@Migration()` was applied to directly, so "chain" and
 * "own" agree ).
 */
export declare function extractMigrationDescriptor(target: unknown): IMigrationDescriptor | undefined;
/**
 * The same descriptor, but OWN ONLY - `undefined` for a subclass that carries no `@Migration()` of
 * its own, even though `extractMigrationDescriptor` above would resolve one through the prototype
 * chain from its nearest decorated ancestor.
 *
 * `Orm.discoverMigrations()` needs exactly this for `Env`: a subclass does not inherit WHERE its
 * parent runs, only what it does. Reading through the chain here would make an undecorated
 * subclass of an `{ Env: 'local' }` migration silently inherit 'local' and vanish under every other
 * environment - and, the other direction, throw a spurious "declares environment X via @Migration"
 * for a subclass whose file suffix merely disagrees with an ancestor's declaration it never made
 * itself.
 */
export declare function extractOwnMigrationDescriptor(target: unknown): IMigrationDescriptor | undefined;
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