import type { LanguageModelV4StreamPart } from "@ai-sdk/provider";
export type ModelStreamPartClass = 
/**
 * Output that `emitAiSdkEvents()` converts into `AgentModelEvent`s and
 * that therefore reaches the assistant message. A turn containing any of
 * these is not empty.
 */
"converted-content"
/**
 * Real model output that Cline does not (yet) convert into agent events.
 * The model responded, so retrying would waste billable requests and
 * likely reproduce the same output — never retried. If a turn contains
 * ONLY unsupported output the assistant message can still come out
 * empty; that is an explicit contract gap of this bucket, preferred over
 * silently re-billing a turn the model did answer.
 */
 | "unsupported-output"
/** Markers and metadata that do not constitute model output. */
 | "structural"
/** `stream-start` — carries warnings; one per attempt. */
 | "stream-start"
/** Terminal accounting part — carries usage and the finish reason. */
 | "finish"
/** An upstream error surfaced as a stream part. */
 | "error";
export declare function classifyModelStreamPart(part: LanguageModelV4StreamPart): ModelStreamPartClass;
/**
 * Whether a completed attempt that contained only parts for which this
 * returns `false` (plus `stream-start`/`finish`) counts as a genuinely empty
 * turn. Both converted and unsupported output mean "the model responded".
 */
export declare function isModelOutputPart(part: LanguageModelV4StreamPart): boolean;
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