export declare const CANVAS_STOPHOOK_PATH: string;
export declare const CANVAS_INBOX_WATCHER_PATH: string;
export declare const CANVAS_RECAP_PATH: string;
export declare const CANVAS_GOAL_CAPTURE_PATH: string;
export declare const CANVAS_PASSIVE_CONTEXT_PATH: string;
export declare const CANVAS_CONTEXT_INTRO_PATH: string;
export declare const CANVAS_DOC_SUBSTRATE_PATH: string;
export declare const CANVAS_STRUCTURED_OUTPUT_PATH: string;
export declare const CANVAS_BASH_VALVE_PATH: string;
/** The canvas extensions every node loads, in order. The inbox watcher commits
 *  its cursor at agent_settled before the stophook checks it for idle release. */
export declare const CANVAS_EXTENSIONS: string[];
/** Preserve the invariant: mandatory extensions are always present exactly once.
 *
 *  - canonical mandatory list always prepended
 *  - duplicates removed
 *  - genuine custom extras appended in their persisted order
 */
export declare function mergeCanvasExtensions(persisted: unknown): string[];
export declare function assertMandatoryCanvasExtensions(extensions: string[]): void;