/**
 * Client-side mirror of session-worker product caps.
 * Keep in sync with packages/session-worker/src/caps.ts.
 */
export declare const PRODUCT_CAPS: {
    readonly max_message_chars: 8000;
    readonly max_context_chars: 64000;
    readonly max_context_label_chars: 120;
    readonly max_summary_chars: 500;
    readonly max_proposal_payload_chars: 100000;
    readonly max_effect_detail_chars: 200000;
    readonly max_display_name_chars: 80;
    readonly max_title_chars: 120;
    readonly max_events_per_session: 1000;
    readonly events_warn_threshold: 800;
    readonly max_events_in_memory: 500;
    readonly min_ttl_hours: 1;
    readonly max_ttl_hours: 168;
    /** Wait timeout max (seconds) for CLI/MCP. */
    readonly max_wait_timeout_seconds: 300;
    /** Local command stdout/stderr capture cap. */
    readonly max_command_output_chars: 200000;
};
export declare function assertMaxChars(value: string, max: number, field: string): void;
export declare function assertProposalPayloadSize(payload: Record<string, unknown> | undefined): void;
export declare function truncateEffectDetail(detail: string | undefined): string | undefined;
export declare function assertMessageText(text: string): void;
export declare function assertContextShare(label: string, content: string): void;
export declare function assertProposalInput(summary: string, payload?: Record<string, unknown>): void;