import type { GateContext, GateMatcher, GateVerdict } from './gate-types.js';
export declare const FREEZE_CHECK_EVENT = "freeze-check";
/** The known gate event types — for error messages and host discovery. */
export declare function knownGateEvents(): string[];
/** Every known gate with the matcher it installs under, in registry order. */
export declare function knownGates(): ReadonlyArray<{
    event: string;
    matcher: GateMatcher;
}>;
/**
 * The PreToolUse matcher a gate installs under. Throws (fail-loud) on an
 * unknown event — never a default matcher.
 */
export declare function gateMatcher(event: string): GateMatcher;
/**
 * Evaluate a gate. Pure with respect to state: reads deterministic sources,
 * never mutates. Throws (fail-loud) on an unknown event or an unparseable
 * source — it never default-allows.
 *
 * `context` (mmnto-ai/totem#2800) carries the per-evaluation seams a gate may
 * read: the enforcement tier for ITS OWN unevaluable class, the injected `gh`
 * runner, the environment, and the stderr sink. A gate that reads none of them
 * — `freeze-check`, `transport-shield` — is unaffected by what it carries, so
 * a tier can never soften them.
 */
export declare function evaluateGate(event: string, payload: unknown, totemDir: string, context?: GateContext): GateVerdict;
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