import type { string_book } from './string_book';
/**
 * One explicit `FROM` commitment written in a book.
 *
 * @private utility of Agents Server inheritance resolution
 */
export type ExplicitFromCommitment = {
    /**
     * Zero-based index of the line the commitment was found on, within the scanned lines.
     */
    readonly lineIndex: number;
    /**
     * Trimmed commitment content, empty string for a blank `FROM`.
     */
    readonly content: string;
};
/**
 * Collects every explicit single-line `FROM` commitment of one book.
 *
 * This lightweight parser is intentionally limited to the subset needed by inheritance
 * resolution so it stays safe to bundle into the Next.js proxy path.
 *
 * @param sourceLines - Book source already split into lines.
 * @returns Found `FROM` commitments in source order, empty when the book declares no parent.
 *
 * @private utility of Agents Server inheritance resolution
 */
export declare function collectExplicitFromCommitments(sourceLines: ReadonlyArray<string>): ReadonlyArray<ExplicitFromCommitment>;
/**
 * Returns the effective explicit `FROM` commitment of one book.
 *
 * A book may repeat `FROM`, in which case the last one wins and overrides every earlier one.
 *
 * @param agentSource - Raw book source.
 * @returns The last explicit `FROM` commitment, or `undefined` when the book declares no parent.
 *
 * @private utility of Agents Server inheritance resolution
 */
export declare function getEffectiveExplicitFromCommitment(agentSource: string_book): ExplicitFromCommitment | undefined;
/**
 * Returns the effective explicit `FROM` commitment content of one book.
 *
 * A book may repeat `FROM`, in which case the last one wins and overrides every earlier one.
 *
 * @param agentSource - Raw book source.
 * @returns Trimmed commitment content, empty string for a blank explicit `FROM`, or `undefined` when `FROM` is absent.
 *
 * @private utility of Agents Server inheritance resolution
 */
export declare function getExplicitFromCommitmentContent(agentSource: string_book): string | undefined;
/**
 * Returns true when one book declares no parent at all and therefore implicitly inherits from `@Adam`.
 *
 * Writing no `FROM` commitment is equivalent to writing `FROM @Adam`, so only an explicit
 * `FROM @Null` / `FROM {Void}` turns the inheritance off.
 *
 * @param agentSource - Raw book source.
 * @returns True when the implicit `@Adam` ancestor applies to this book.
 *
 * @private utility of Agents Server inheritance resolution
 */
export declare function isImplicitAdamInheritance(agentSource: string_book): boolean;