export declare const BACKBONE_SCHEMA_VERSION = "2026-07-18.1";
export declare const BACKBONE_MODEL_KB_VERSION = "2026-07-18.1";
export declare const BACKBONE_ROUTING_POLICY_VERSION = "2026-04-27.1";
export declare const BACKBONE_DURABLE_HOSTED_STEP_TOOL_NAMES: readonly ["image_to_3d", "remove_background", "segment_image", "generate_image", "generate_video", "generate_music", "generate_speech", "edit_image", "apply_style", "restore_photo", "upscale_image", "upscale_video", "refine_result", "animate_photo", "change_angle", "video_to_video", "stitch_video", "orbit_video", "dance_montage", "sound_to_video", "extend_video", "replace_video_segment", "overlay_video", "add_subtitles", "analyze_image", "analyze_video", "extract_metadata", "ask_clarifying_question", "finalize_response", "create_asset_manifest", "inspect_asset", "label_asset", "map_assets_for_model", "validate_asset_references"];
export type BackboneDurableHostedStepToolName = (typeof BACKBONE_DURABLE_HOSTED_STEP_TOOL_NAMES)[number];
export type BackboneWorkflowStatus = "queued" | "running" | "completed" | "partial_failure" | "waiting_for_user" | "failed" | "cancelled";
export type BackboneWorkflowDependencyTransform = "artifact_url" | "artifact_data_uri" | "image_url" | "video_url" | "audio_url" | "image_index" | "video_index" | "audio_index" | "subtitle_cues" | "subtitle_srt" | "overlay_items" | "asset_ref";
export interface BackboneWorkflowStepDependencyBinding {
    sourceStepId: string;
    targetArgument: string;
    transform: BackboneWorkflowDependencyTransform;
    sourceArtifactId?: string;
    sourceArtifactIndex?: number;
    mediaType?: "image" | "video" | "audio";
    required?: boolean;
}
export interface BackboneDurableWorkflowPlanStep {
    id: string;
    sequence: number;
    toolName: BackboneDurableHostedStepToolName;
    arguments: Record<string, unknown>;
    dependsOn?: BackboneWorkflowStepDependencyBinding[];
}
export interface BackboneVersionManifest {
    schemaVersion: typeof BACKBONE_SCHEMA_VERSION;
    modelKnowledgeVersion: typeof BACKBONE_MODEL_KB_VERSION;
    routingPolicyVersion: typeof BACKBONE_ROUTING_POLICY_VERSION;
}
export interface BackboneDurableWorkflowRunContract {
    workflowId: string;
    status: BackboneWorkflowStatus;
    backbone: BackboneVersionManifest;
    title?: string;
    input: Record<string, unknown>;
    steps: BackboneDurableWorkflowPlanStep[];
    events: unknown[];
    artifacts: unknown[];
    lease?: {
        leaseId: string;
        ownerId: string;
        acquiredAt: string;
        heartbeatAt: string;
        expiresAt: string;
    };
    recovery?: {
        resumeCount: number;
        lastResumeAt?: string;
        lastRecoveredAt?: string;
        reason?: string;
    };
    quality?: {
        postflightAudits?: unknown[];
    };
    timestamps: {
        createdAt: string;
        updatedAt: string;
        completedAt?: string;
    };
}
export interface BackboneDurableWorkflowStepInput {
    id?: string;
    toolName: BackboneDurableHostedStepToolName;
    arguments: Record<string, unknown>;
    dependsOn?: BackboneWorkflowStepDependencyBinding[];
}
export interface BackboneDurableWorkflowInput {
    title?: string;
    steps: BackboneDurableWorkflowStepInput[];
    mediaReferences?: unknown[];
}
export declare const BACKBONE_VERSIONS: BackboneVersionManifest;
export declare class BackboneWorkflowValidationError extends Error {
    constructor(message: string);
}
export declare const MAX_HOSTED_TOOL_SEQUENCE_STEPS = 12;
export declare function normalizeBackboneDurableWorkflowSteps(input: BackboneDurableWorkflowInput): BackboneDurableWorkflowPlanStep[];
export declare function buildBackboneDurableWorkflowRun(input: BackboneDurableWorkflowInput, options: {
    workflowId: string;
    now?: string;
    title?: string;
}): BackboneDurableWorkflowRunContract;
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