import type { ProductGraph } from '../graph/graph-types.js';
import type { Plan } from '../planner/plan-types.js';
export interface BuildState {
    readonly version: string;
    readonly lastCompiled: string;
    readonly sourceHash: string;
    readonly graphHash: string;
    readonly checksum: string;
}
export interface LockInfo {
    readonly pid: number;
    readonly timestamp: string;
}
/**
 * Ensure the .prodara/ directory exists.
 * Creates a .gitignore to exclude transient files (runs/, temp files).
 */
export declare function ensureBuildDir(root: string): string;
/**
 * Read the previous product graph from build state, if it exists.
 */
export declare function readPreviousGraph(root: string): ProductGraph | null;
/**
 * Clean up any leftover temp files from a failed write.
 */
export declare function cleanupTempFiles(root: string): void;
/**
 * Write build state files atomically.
 * Writes to temp files first, then renames all three.
 * If any rename fails, cleans up temp files.
 */
export declare function writeBuildState(root: string, graph: ProductGraph, plan: Plan, sourceFiles: readonly string[]): void;
/**
 * Acquire a build lock. Throws if another process holds the lock.
 */
export declare function acquireLock(root: string): void;
/**
 * Release the build lock.
 */
export declare function releaseLock(root: string): void;
//# sourceMappingURL=build-state.d.ts.map