import type { AgentMessage } from "@caupulican/pi-agent-core";
export declare function textContentPrefix(content: readonly unknown[], maxChars?: number): string;
/** Project the latest provider-visible user prompt without rebuilding earlier context. */
export declare function latestUserPromptText(messages: readonly AgentMessage[], maxChars?: number): string;
/** Project the latest non-empty assistant response without copying or reversing session history. */
export declare function latestAssistantText(messages: readonly AgentMessage[]): string | undefined;
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