/**
 * Action Decoder — normalized model-output boundary.
 *
 * Normalizes heterogeneous provider/model output (native tool calls,
 * structured JSON envelopes, plain-text fallback) into the finite
 * Jensen-owned AgentAction union. The rest of the runtime never inspects raw
 * provider output directly.
 */
import type { ActionValidationFailure, AgentAction } from "./types.js";
export type ActionDecodeResult = {
    ok: true;
    action: AgentAction;
} | {
    ok: false;
    failure: ActionValidationFailure;
};
/**
 * Decode raw model output into an AgentAction. Returns a structured failure
 * (never throws) when the output cannot be normalized.
 */
export declare function decodeAction(raw: unknown): ActionDecodeResult;
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