/**
 * context-mode-bridge.ts — Bridge between pi-subagents and @onlinechef/context-mode.
 *
 * Provides optional ctx_* tool injection for sub-agents. When context-mode is
 * installed, sub-agents gain sandboxed code execution and BM25 FTS5 search.
 * When not installed, all functions gracefully return null/empty — no errors.
 */
/**
 * Check if @onlinechef/context-mode is installed in the runtime.
 * Uses synchronous module resolution — pi's runtime provides `require`.
 * Cached after first call for zero-cost repeat checks.
 */
export declare function isContextModeAvailable(): boolean;
/**
 * Get the list of ctx_* tool names provided by context-mode.
 * Pure function — always returns the same constant array.
 */
export declare function getCtxToolNames(): string[];
/**
 * Build a markdown routing block instructing sub-agents to use ctx_* tools.
 * Mirrors context-mode's AGENTS.md routing rules.
 * Pure function — same input always produces same output.
 */
export declare function buildCtxRoutingBlock(): string;
/** Result shape for buildCtxInjection — only returned when context-mode is available. */
export interface CtxInjection {
    /** Markdown block to append to the sub-agent's system prompt. */
    systemPromptAddition: string;
    /** Tool names to add to the sub-agent's tool allowlist. */
    toolAllowList: string[];
}
/**
 * Build the context-mode injection payload for a sub-agent.
 * Returns null when context-mode is not installed (early exit — no errors).
 *
 * When available, returns the system prompt addition and ctx_* tool names
 * that should be injected into the sub-agent's configuration.
 */
export declare function buildCtxInjection(): CtxInjection | null;