/** Serializable metadata for an extension command whose handler deterministically
 * turns its raw argument string into the user prompt sent to the engine. Commands
 * that open UI, inspect live state, or perform side effects must omit it. */
export interface DeterministicCommandExpansion {
    kind: 'memory-slash';
    commandName: string;
    body: string;
}
/** Accept only the inert, JSON-safe discriminated shape that may cross the
 * broker boundary. Extension registrations are arbitrary runtime objects, so
 * never serialize getters, prototypes, or extra metadata into a viewer. */
export declare function isDeterministicCommandExpansion(value: unknown): value is DeterministicCommandExpansion;
/** Remove HTML comments from Markdown before it becomes model context. Markdown
 * command files use comments for author metadata; fenced and inline code remain
 * literal so examples of HTML are never altered. */
export declare function stripMarkdownComments(markdown: string): string;
/** The single expansion path used by deterministic command handlers and by
 * pre-submit disclosure. `rawArgs` is the unparsed text after the slash name. */
export declare function expandDeterministicCommand(expansion: DeterministicCommandExpansion, rawArgs: string): string;