/**
 * Hook installer registry — one table, six former call sites.
 *
 * Before this, six places mapped a platform name to a hook installer or a hook
 * status with a literal comparison, and they did not agree. The worst was a
 * *read* site: `commands/cost.ts` resolved status as
 * `p.name === 'claude-code' ? claudeCodeHookStatus : kiroHookStatus` inside a loop
 * over every registered provider, so registering a third provider would have
 * printed Kiro's hook state under the new platform's label — on the diagnostic
 * built specifically to stop capture failing silently.
 *
 * **This table is static and independent of the provider registry, on purpose.**
 * Three doctor migrations kept their own two-entry tables because `allProviders()`
 * is empty unless someone has called `registerBuiltinProviders()`, and a
 * diagnostic that silently finds nothing is worse than no diagnostic. Deriving
 * hook platforms from the provider registry would reintroduce exactly that. A
 * module-level literal cannot be empty (agent-portability/AC-41, AC-43).
 *
 * Requirements: agent-portability/AC-41, AC-42, AC-43
 * Design: design.md A5
 *
 * @module
 */
import { type HookStatus } from './claude-code.js';
/** What every platform that can carry a cost hook must provide. */
export interface HookInstaller {
    readonly platform: string;
    install(projectRoot: string, nodePath: string, cliPath: string): void;
    remove(projectRoot: string): void;
    status(projectRoot: string): HookStatus;
}
/** Platform names that have a hook installer. Never empty. */
export declare function hookPlatforms(): string[];
/** The installer for a platform, or null when it has none. */
export declare function hookInstaller(platform: string): HookInstaller | null;
/**
 * A platform's hook status, or null when the platform has no hook mechanism.
 *
 * Returning null rather than falling back to another platform's status is the
 * whole point: a platform with no installer has no hook state to report, and
 * saying so is different from reporting somebody else's.
 */
export declare function hookStatusFor(platform: string, projectRoot: string): HookStatus | null;
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