/**
 * F-012 L2 — the ENGINE-INTERNAL ask-class envelope.
 *
 * An `ask` verdict's SEMANTIC CLASS decides whether a deployment-declared sandbox may auto-admit it
 * (the ruling: a declared sandbox admits everything inside it — the boundary crossings park to a
 * human, escape prevention belongs to the sandbox, not to engine re-policing). The class deliberately
 * lives OUTSIDE the public `PermissionResult`: a decision object is caller-supplied data, and a
 * self-reported "this ask is sandbox-local" field would be the same trust hole as the
 * `decisionReason:"safety"` self-declaration this codebase already refuses. Instead, BUILT-IN policy
 * factories register their instances here (private WeakMap brand — nothing a deployment policy can
 * self-declare by shaping its return value), and everything unregistered reads as `unknown`.
 *
 * Classes and their dominance (STRICT — merge keeps the strongest; only an all-`sandbox_local` set
 * may auto-admit):
 *  - `sandbox_local`   — an engine-authored "confirm a potentially destructive LOCAL action" ask
 *                        (name/pattern confirmation lists). Sandbox containment answers it.
 *  - `external_authority` — an ask whose whole point is real judgment (the safety-rule policies with
 *                        `requiresRealApproval`); containment answers nothing about it.
 *  - `hook`            — a screening-face ask (a deployment's PreToolUse verdict folded to policy
 *                        form); the face's authority is the deployment's, not the sandbox's.
 *  - `mandate`         — an ask bound to durable-park semantics (inherited durable mandate /
 *                        approver-unavailable float); it must reach the park untouched.
 *  - `unknown`         — everything unregistered, every deployment policy. Fail-closed: never
 *                        admitted.
 */
export type AskClass = "sandbox_local" | "external_authority" | "hook" | "mandate" | "unknown";
/**
 * Brand a built-in policy instance with its ask class (engine factories only — not exported from the
 * package). The `check` binding is LOCKED as a non-writable, non-configurable DATA property before the
 * policy is returned (falsification-style round 4, HIGH): reading `policy.check` and INVOKING it must
 * name the same callable, atomically. A plain `===` re-read was TOCTOU-able by an accessor — a getter
 * could return the branded function to `policyAskClassOf` and a deployment ask to the gate's
 * invocation. Locking the property makes the callable un-swappable and un-redefinable, so the class
 * travels with the exact decision function. An `check` that is ALREADY accessor-backed (or a frozen
 * object we cannot lock) is refused branding — it reads back `unknown` (fail-closed), never trusted.
 */
export declare function brandPolicyAskClass<T extends {
    check: unknown;
}>(policy: T, cls: AskClass): T;
/** The registered class of a policy instance — `unknown` for anything unregistered, whose `check` is
 *  no longer the locked data value, or whose `check` became accessor-backed (fail-closed: a
 *  replaced/decorated/getter-shadowed decision function is not the branded one). Reads the property
 *  DESCRIPTOR's value (never invokes a getter), so the check is atomic with what the gate will call. */
export declare function policyAskClassOf(policy: (object & {
    check?: unknown;
}) | null | undefined): AskClass;
/** The strongest class in a set (strict dominance — any non-`sandbox_local` member dominates). */
export declare function dominantAskClass(classes: readonly AskClass[]): AskClass;