import type { Host } from "../host/host.js";
import type { StateStack } from "./state/stateStack.js";
/** Install a root cost/time budget. Applies the disable rule: cost < 0 installs
 *  nothing; time <= 0 installs nothing (cost 0 IS a real limit — no paid spend,
 *  local-models-only). Called once at the root, next to installRunPolicyHandler,
 *  before the node body runs, so the budget is outermost and cannot be bypassed.
 *  No-op in IPC subprocesses — a child's budget is owned by the parent's guard,
 *  which meters the subprocess through the branch clone.
 *
 *  pushGuard() installs immediately, so a time budget's clock starts at run
 *  start — the intended whole-run semantics. Interrupt halts and input() waits
 *  still pause it like any other time guard. */
export declare function installRootBudget(stack: StateStack, host: Host, contextBudget?: {
    maxCost?: number;
    maxTimeMs?: number;
}): void;
/** Re-assert the root budget on a RESUMED exec context. The root guard is
 *  serialized with the checkpoint, so on a stateless served resume its limit
 *  arrives from a client-controllable payload — a crafted resume could raise the
 *  ceiling. Clamp the restored root guard's LIMIT to the host value while
 *  KEEPING the guard (and its accumulated spend/elapsed):
 *
 *  - the limit becomes host-authoritative and un-raisable from the client;
 *  - accumulated spend is preserved, so the trusted in-process CLI resume path
 *    stays cumulative across legs — no regression — and a served client that
 *    lowers its own reported spend only hurts itself (same residual gap a
 *    stateless resume always has);
 *  - arming is untouched (restored guards are un-armed by restoreState), so this
 *    can't reintroduce a timer pop-race.
 *
 *  A dimension the host no longer caps has its restored root guard dropped
 *  (through `uninstall`); a dimension the host caps but the checkpoint had no
 *  root guard for gets a fresh guard. No-op in IPC. */
export declare function reinstallRootBudget(stack: StateStack, host: Host, contextBudget?: {
    maxCost?: number;
    maxTimeMs?: number;
}): void;