import type { ConversationState } from "#client/conversation-state.js";
import type { EveAgentStoreSnapshot } from "#client/eve-agent-store.js";
import type { EveAgentReducer } from "#client/reducer.js";
import { type FailureStreamEvent } from "./errors.js";
export interface TokenUsage {
    readonly inputTokens: number;
    readonly outputTokens: number;
}
/** Terminal presentation facts that the canonical conversation does not model. */
export interface TuiSessionData {
    /** Step usage summed across the session; the renderer subtracts a turn baseline. */
    readonly usage: TokenUsage;
    /** The latest step's report, whose input restates the context size. */
    readonly lastStepUsage?: {
        readonly inputTokens?: number;
        readonly outputTokens?: number;
    };
    /** The model the latest turn resolved; cleared when another turn starts. */
    readonly modelId?: string;
    readonly modelTurnId?: string;
    /** One entry per failure cascade (`step.failed` → `turn.failed` → `session.failed`). */
    readonly failures: readonly FailureStreamEvent[];
    readonly sessionFailed: boolean;
    /** Failure keys seen since the last `turn.started`, for cascade deduplication. */
    readonly turnFailureKeys: readonly string[];
    /** Tools' authored `label` copy by call, which the canonical conversation drops. */
    readonly toolLabels: Readonly<Record<string, ToolLabels>>;
    /** Calls the session refused for the model to retry; people only see the retry. */
    readonly withdrawnCallIds: readonly string[];
}
export interface ToolLabels {
    readonly start?: string;
    readonly complete?: string;
}
export declare const tuiSessionReducer: EveAgentReducer<TuiSessionData>;
/** One rendered failure cascade. */
export interface AgentTUIFailure {
    readonly message: string;
    readonly hint?: string;
    /** Diagnostic dump for unrecognized failures. */
    readonly detail?: string;
}
/** Everything the renderer draws for the session, derived from one store snapshot. */
export interface AgentTUIConversationView {
    readonly conversation: ConversationState;
    /** A turn is being submitted or is running, including server-initiated turns. */
    readonly working: boolean;
    readonly data: TuiSessionData;
    readonly failures: readonly AgentTUIFailure[];
}
export declare function conversationView(snapshot: EveAgentStoreSnapshot<TuiSessionData>, 
/** Replaces a failure's harness hint with a surface-local fix. */
failureHint?: (event: FailureStreamEvent) => string | undefined): AgentTUIConversationView;
export declare function isWorking(status: EveAgentStoreSnapshot<unknown>["status"]): boolean;