import { z } from 'zod';
export declare const PARENT_CONTEXT_ENV = "VV_PARENT_CONTEXT";
export declare const MAX_NESTED_DEPTH = 3;
export declare const ParentContextSchema: z.ZodObject<{
    runId: z.ZodString;
    treeHash: z.ZodString;
    depth: z.ZodNumber;
    stepName: z.ZodString;
    phaseName: z.ZodOptional<z.ZodString>;
    outputDir: z.ZodString;
    capturing: z.ZodBoolean;
    caching: z.ZodBoolean;
    extracting: z.ZodBoolean;
    verbose: z.ZodBoolean;
    forceExecution: z.ZodBoolean;
}, "strict", z.ZodTypeAny, {
    treeHash: string;
    runId: string;
    depth: number;
    stepName: string;
    outputDir: string;
    capturing: boolean;
    caching: boolean;
    extracting: boolean;
    verbose: boolean;
    forceExecution: boolean;
    phaseName?: string | undefined;
}, {
    treeHash: string;
    runId: string;
    depth: number;
    stepName: string;
    outputDir: string;
    capturing: boolean;
    caching: boolean;
    extracting: boolean;
    verbose: boolean;
    forceExecution: boolean;
    phaseName?: string | undefined;
}>;
export type ParentContext = z.infer<typeof ParentContextSchema>;
export interface ChildContextInput {
    runId: string;
    treeHash: string;
    stepName: string;
    phaseName?: string;
    outputDir: string;
    verbose: boolean;
    forceExecution: boolean;
}
export declare function readParentContext(): ParentContext | null;
export declare function buildChildContext(parent: ParentContext | null, input: ChildContextInput): ParentContext;
export declare function serializeForEnv(ctx: ParentContext): string;
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