import type { Message } from '../types/messages.js';
export interface MessageRepairReport {
    changed: boolean;
    removedToolUses: string[];
    removedToolResults: string[];
    removedMessages: number;
}
export interface MessageRepairResult {
    messages: Message[];
    report: MessageRepairReport;
}
/**
 * Repair provider-level tool-call adjacency invariants.
 *
 * Anthropic requires every assistant `tool_use` block to have a matching
 * `tool_result` block in the immediately following user message. Manual
 * context surgery (summary/prune) can cut through the middle of such an
 * exchange. This function removes only the now-orphaned protocol blocks,
 * preserving surrounding text/images/thinking blocks where possible.
 */
export declare function repairToolUseAdjacency(messages: Message[]): MessageRepairResult;
/**
 * True when a message content payload carries meaningful information for
 * the provider: non-whitespace text, a tool call/result, thinking with
 * text or a signature, or any other block type.
 *
 * False for empty strings/arrays and for arrays whose only blocks are
 * empty or whitespace-only text — the shape persisted when a stream is
 * interrupted before the first meaningful delta (issue #271). Strict
 * providers reject such assistant turns, so repair and replay paths must
 * treat them as empty.
 */
export declare function hasMeaningfulContent(content: Message['content']): boolean;
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