import type { SecretScrubber } from '../types/secret-scrubber.js';
export declare const INPUT_HISTORY_DEFAULT_MAX = 100;
/**
 * Per-project TUI prompt input history.
 *
 * Backed by a single JSON file at `~/.wrongstack/projects/<slug>/input-
 * history.json`. Entries are newest-first, capped at `maxEntries`. Before
 * any entry is written to disk it is passed through a `SecretScrubber` and
 * dropped if it still contains a redacted marker — leaking a pasted API
 * key into a history file would be a real incident, so the scrubber is
 * mandatory, not optional.
 *
 * The store is intentionally small and synchronous-ish (load once at TUI
 * boot, save debounced on change). It mirrors PromptUsageStore's shape so
 * the two read as a family.
 */
export declare class InputHistoryStore {
    private readonly file;
    private readonly scrubber;
    private readonly maxEntries;
    /**
     * @param file Absolute path to the per-project input-history.json.
     * @param scrubber SecretScrubber used to filter secrets before write.
     * @param maxEntries Cap on the number of entries persisted. Default 100.
     */
    constructor(file: string, scrubber: SecretScrubber, maxEntries?: number);
    /**
     * Load the persisted entries. Missing or corrupt file → empty list
     * (never throws — history is best-effort).
     */
    load(): Promise<string[]>;
    /**
     * Persist `entries` to disk after scrubbing each one. Entries that still
     * contain a redaction marker AFTER scrubbing are dropped — a half-scrubbed
     * prompt like "export API_KEY=***REDACTED***" is useless as history and
     * keeping it risks confusing the agent. Dedup is the caller's job (the
     * reducer already dedups); this method only scrubs, caps, and writes.
     */
    save(entries: string[]): Promise<void>;
    /** Truncate the file to an empty entry list (used by /clear). */
    clear(): Promise<void>;
    /**
     * Run each entry through the scrubber and drop any that still contain a
     * redaction marker. Internal so the test suite can pin the policy.
     */
    private scrubAndFilter;
    /**
     * Heuristic: did the scrubber actually redact anything? DefaultSecretScrubber
     * replaces matches with "***REDACTED***", so a residual marker means a secret
     * was detected. Subclasses of SecretScrubber that use a different sentinel
     * can be accommodated by widening this check in the future; for now the
     * marker check covers the shipped scrubber.
     */
    private looksRedacted;
}
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