/**
 * Shared utilities for reading and editing Unity AnimatorController files.
 */
export interface AnimatorBlock {
    file_id: string;
    class_id: number;
    type_name: string;
    raw: string;
}
/**
 * Split a multi-document Unity YAML file into typed blocks.
 * Supports negative 64-bit fileIDs (e.g. &-8508701068132362129).
 */
export declare function split_yaml_blocks(content: string): AnimatorBlock[];
/**
 * Extract a YAML field value from a block's raw text.
 */
export declare function yaml_field(raw: string, field: string): string | null;
/**
 * Extract an inline reference {fileID: X, guid: Y} from a string.
 * Supports negative fileIDs.
 */
export declare function parse_inline_ref(str: string): {
    fileID: string;
    guid: string;
} | null;
/**
 * Find a state block by its m_Name.
 * Returns the block or null.
 */
export declare function find_state_by_name(blocks: AnimatorBlock[], name: string): AnimatorBlock | null;
/**
 * Find the state machine block for a given layer.
 * If layer_name is not specified, returns the first state machine.
 */
export declare function find_state_machine_for_layer(blocks: AnimatorBlock[], controller_block: AnimatorBlock, layer_name?: string): AnimatorBlock | null;
/**
 * Generate a positive fileID suitable for new Unity YAML blocks.
 * Uses large positive integers to avoid collisions with existing IDs.
 */
export declare function generate_file_id(existing_ids: Set<string>): string;
/**
 * Collect all fileIDs (as strings) from the file content.
 */
export declare function collect_file_ids(content: string): Set<string>;
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