import { StatusLevel } from '#src/core/types.js';
export interface PlainToolIndicationObserver {
    /** Feed every streamed message/chunk (the string path's existing loop) through this. */
    observe(chunk: unknown): void;
}
/**
 * Create the observer.
 *
 * **Its state lives for a TURN, not for a stream, and the caller is what decides that.**
 * `GthAbstractAgent` builds one on the first `streamFromInput` of a turn and reuses it for every
 * later stream of the same turn, discarding it when the next turn opens or `/clear` lands. This
 * is [[TUI-C106]]: an approval-gated call is announced in the stream that suspends at the gate and
 * answered in the stream that resumes, so a per-stream observer met the `ToolMessage` having never
 * seen its producer, threw away arguments it had correctly accumulated, and rendered `name()` —
 * issue #445. Nothing in this module changed to fix that; only how long it is kept.
 *
 * tool_call deltas are accumulated from `tool_call_chunks` (keyed by the provider's chunk
 * `index`, which restarts per LLM round — the map is closed into the round's tracking whenever a
 * `ToolMessage` arrives, mirroring `processEventStream`'s reset-per-round). Deliberately does
 * NOT `concat()` whole `AIMessageChunk`s: only the tool-call slices are needed, which also
 * sidesteps the TUI-C29 `__raw_response` aggregation-growth trap entirely.
 *
 * `emit` is injectable for tests; production uses `displayToolIndication`, which gates on the
 * level this module passes it — `TOOL_STATUS_LEVEL`, which is module-private deliberately: the
 * mapping is this surface's rendering decision, not an API another package should key on.
 */
export declare function createPlainToolIndication(emit?: (text: string, level: StatusLevel) => void, 
/**
 * [[TUI-C69]] §5.4 — **was this call refused back to the agent as a negotiation round?** Asked
 * per tool-call id at the moment the result is rendered, never earlier: the gate decides while
 * this stream is being drained, so a snapshot taken when the observer was built would always
 * say no.
 *
 * Defaults to *"nothing is a clarification"*, which is what a surface with no gate behind it
 * (and every existing caller) means.
 */
isRaterClarification?: (toolCallId: string) => boolean): PlainToolIndicationObserver;