/**
 * `recallContext` — the loop-memory seam. One best-effort call that agent
 * commands prepend to their user prompt so a task starts already knowing what
 * prior sessions decided/tried. Returns "" (not a placeholder) when ctx is
 * absent or nothing is recalled, so callers can inject conditionally without
 * polluting the prompt or paying tokens for a "nothing found" note.
 */
import { type CtxRunner } from "./ctx.js";
export interface RecallContextOpts {
    query?: string;
    file?: string;
    limit?: number;
    since?: string;
    label?: string;
}
/** best-effort recall brief for prompt injection; "" when nothing useful. */
export declare function recallContext(opts: RecallContextOpts, run?: CtxRunner): string;
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