/**
 * fork-subagent.ts — Fork subagent logic: boilerplate builder, guards, helpers.
 *
 * The fork pattern lets the LLM omit subagent_type to create a child that
 * inherits the parent's full conversation context (system prompt, history,
 * tool pool) with byte-identical API request prefixes for prompt cache
 * sharing across all fork children spawned from the same parent message.
 *
 * Reference: claude-code-main/src/tools/AgentTool/forkSubagent.ts
 */
/** XML tag wrapping fork boilerplate rules in the child's directive message. */
export declare const FORK_BOILERPLATE_TAG = "fork-boilerplate";
/** Prefix appended before the directive text in the child's first message. */
export declare const FORK_DIRECTIVE_PREFIX = "Your directive: ";
/** Placeholder text used for every tool_result block in the fork prefix.
 *  Must be identical across ALL fork children for prompt cache sharing. */
export declare const FORK_PLACEHOLDER_RESULT = "Fork started \u2014 processing in background";
/** Synthetic agent type name used for analytics when the fork path fires. */
export declare const FORK_SUBAGENT_TYPE = "fork";
export declare function isForkSubagentEnabled(): boolean;
/**
 * Build the forked conversation messages for the child agent.
 *
 * For prompt cache sharing, all fork children must produce byte-identical
 * API request prefixes. This function:
 * 1. Keeps the full parent assistant message (all toolCall blocks, text)
 * 2. Builds a single user message with tool_result blocks for every toolCall
 *    using an identical placeholder, then appends a per-child directive text
 *
 * Result: [assistant(all_toolCalls), user(placeholder_results, directive)]
 * Only the final text block differs per child, maximizing cache hits.
 */
export declare function buildForkedMessages(directive: string, assistantMessage: {
    role: "assistant";
    content: any[];
    [key: string]: any;
}): any[];
export declare function buildChildMessage(directive: string): string;
/**
 * Guard against recursive forking. Scans user messages for the fork
 * boilerplate tag. Returns true if the conversation history indicates
 * the current agent is already a fork child.
 */
export declare function isInForkChild(messages: any[]): boolean;
/**
 * Notice injected into fork children running in an isolated worktree.
 * Tells the child to translate paths from the inherited context, re-read
 * potentially stale files, and that its changes are isolated.
 */
export declare function buildWorktreeNotice(parentCwd: string, worktreeCwd: string): string;