import type { StepEnablementEntry } from '../../types/index.js';
import type { PipelineOverlay, KnowledgeOverride, ReadsOverride, DependencyOverride, CrossReadsOverride } from '../../types/index.js';
import type { ScaffoldError, ScaffoldWarning } from '../../types/index.js';
/** Check if a value is a plain object (not null, not array). */
export declare function isPlainObject(value: unknown): value is Record<string, unknown>;
/** Parse step-overrides section from YAML object. */
export declare function parseStepOverrides(raw: Record<string, unknown>, warnings: ScaffoldWarning[], filePath: string): Record<string, StepEnablementEntry>;
/** Parse knowledge-overrides section from YAML object. */
export declare function parseKnowledgeOverrides(raw: Record<string, unknown>, warnings: ScaffoldWarning[], filePath: string): Record<string, KnowledgeOverride>;
/** Parse reads-overrides section from YAML object. */
export declare function parseReadsOverrides(raw: Record<string, unknown>, warnings: ScaffoldWarning[], filePath: string): Record<string, ReadsOverride>;
/** Parse dependency-overrides section from YAML object. */
export declare function parseDependencyOverrides(raw: Record<string, unknown>, warnings: ScaffoldWarning[], filePath: string): Record<string, DependencyOverride>;
/** Parse cross-reads-overrides section from YAML object. */
export declare function parseCrossReadsOverrides(raw: Record<string, unknown>, warnings: ScaffoldWarning[], filePath: string): Record<string, CrossReadsOverride>;
/**
 * Load a project-type overlay YAML file.
 * @param overlayPath - Absolute path to overlay file
 * @returns { overlay, errors, warnings }
 */
export declare function loadOverlay(overlayPath: string): {
    overlay: PipelineOverlay | null;
    errors: ScaffoldError[];
    warnings: ScaffoldWarning[];
};
/**
 * Load a domain sub-overlay YAML file with knowledge-only constraint.
 * Sub-overlays may only contain knowledge-overrides; any step, reads, or
 * dependency override sections are stripped with a warning.
 * @param overlayPath - Absolute path to sub-overlay file
 * @returns { overlay, errors, warnings }
 */
export declare function loadSubOverlay(overlayPath: string): {
    overlay: PipelineOverlay | null;
    errors: ScaffoldError[];
    warnings: ScaffoldWarning[];
};
/**
 * Load a structural overlay YAML file (e.g., multi-service-overlay.yml).
 * Structural overlays have no project-type — they apply across project types
 * based on config properties (e.g., services[] presence).
 *
 * Validates name + description. Ignores project-type field if present.
 * @param overlayPath - Absolute path to structural overlay file
 * @returns { overlay, errors, warnings }
 */
export declare function loadStructuralOverlay(overlayPath: string): {
    overlay: PipelineOverlay | null;
    errors: ScaffoldError[];
    warnings: ScaffoldWarning[];
};
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