/**
 * learning/decisions.ts — Decisions log (append-only, tamper-evident).
 *
 * v10.1.1 — Pillar D: Decisions log backed by `.bizar/learning/decisions.jsonl`.
 *
 * Each entry:
 *   {id, ts, event: 'decide'|'supersede'|'redact',
 *    subject, rationale, refs?, prev_hash, hash}
 *
 * tamper-evident chain: sha256(prev_hash + entry_body) → current hash.
 * Datamark on render: escape unicode surrogates via JSON.stringify replacer
 * (same pattern as gstack's wrapUntrustedContent).
 */
interface DecisionInput {
    event: "decide" | "supersede" | "redact";
    subject: string;
    rationale: string;
    refs?: string[];
    project?: string;
}
/** Record a new decision. Returns the created entry. */
export declare function recordDecision({ event, subject, rationale, refs, project, }: DecisionInput): Record<string, unknown>;
/** List all decisions. */
export declare function listDecisions(opts?: {
    project?: string;
}): Record<string, unknown>[];
/**
 * Verify the tamper-evident chain.
 * Returns { ok: true } if every entry's hash matches the computed hash
 * and prev_hash chains correctly. Returns { ok: false, at: number } on
 * the first break.
 */
export declare function verifyChain(opts?: {
    project?: string;
}): {
    ok: boolean;
    at?: number;
};
/**
 * Datamark renderer — escape unicode surrogates so JSON.stringify never
 * emits invalid strings when rendering decisions in the UI.
 * Pattern borrowed from gstack's wrapUntrustedContent.
 */
export declare function datamark(value: unknown): unknown;
export {};
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