export declare const MAX_CAPTURED_PROMPT_BYTES: number;
export declare const PROMPT_CAPTURE_BANNER = "<!-- Best-effort secret redaction only. Connection strings, PEM blocks, and PII are NOT caught. -->";
export interface CaptureSubagentPromptInput {
    sessionId: string | undefined;
    subagentId: string | undefined;
    isSubagentFork: boolean;
    model: string | undefined;
    turn: number;
    prompt: string;
}
export declare function shouldCaptureSubagentPrompt(input: CaptureSubagentPromptInput): boolean;
export declare function truncateToBytes(text: string, maxBytes: number): {
    text: string;
    originalBytes: number;
    truncated: boolean;
};
export declare function buildPromptDocument(input: CaptureSubagentPromptInput, capture: {
    text: string;
    originalBytes: number;
    truncated: boolean;
}): string;
export declare function captureSubagentPrompt(input: CaptureSubagentPromptInput): Promise<void>;