import type { Backend } from "../backend.js";
import type { BuiltinBackendDefinition } from "./define.js";
import type { ThoughtLevelDomainSemantics } from "./define.js";
export declare const BUILTIN_BACKENDS: {
    readonly claude: BuiltinBackendDefinition<"claude">;
    readonly codex: BuiltinBackendDefinition<"codex">;
    readonly opencode: BuiltinBackendDefinition<"opencode">;
    readonly pi: BuiltinBackendDefinition<"pi">;
};
export type BuiltinBackendId = keyof typeof BUILTIN_BACKENDS;
export declare const BUILTIN_BACKEND_IDS: readonly ("claude" | "codex" | "opencode" | "pi")[];
export declare function assertBuiltinBackendTable(table: Readonly<Record<string, BuiltinBackendDefinition<string>>>): void;
/** Exact, case-sensitive lookup for an untrusted id. Routing owns normalization and fallback. */
export declare function builtinBackend(id: string): Backend | undefined;
/** Exact lookup for registry-owned thought-level semantics. Unknown/custom backends have no row;
 *  consumers must take the safe `exact-set` branch for them. */
export declare function builtinThoughtLevelDomainSemantics(id: string): ThoughtLevelDomainSemantics | undefined;
//# sourceMappingURL=builtins.d.ts.map