import type { TargetAdapter } from './types.js';
/**
 * Registers a `TargetAdapter` under its own `target_type`. Throws `DuplicateTargetAdapterError`
 * (conflict-shaped, ← Task I-8 maps it to HTTP 409) when that `target_type` already has a
 * registered adapter — a registry keyed by `target_type` cannot silently accept a second
 * adapter for the same key without losing the first adapter's identity.
 */
export declare function registerTargetAdapter(adapter: TargetAdapter): void;
/**
 * Resolves the `TargetAdapter` registered for `targetType`, or `null` when no adapter is
 * registered for that key. A missing adapter is not an error — Task I-4's `deliverable_validate`
 * treats it as "use contract completeness only" (SPEC-007 FR-8).
 */
export declare function resolveTargetAdapter(targetType: string): TargetAdapter | null;
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