import { type ContextEvidenceRef } from "./context-item.ts";
import type { MemoryPromptBudget } from "./memory-prompt-budget.ts";
export type MemoryTier = "standing" | "current_work" | "long_term" | "evidence_pointer";
export type MemoryCandidateDropReason = "budget_exhausted" | "tier_lower_priority" | "stale_or_conflicting" | "secret_like" | "oversized_item" | "retrieval_not_triggered" | "empty_summary";
export interface MemoryTierCandidate {
    id: string;
    tier: MemoryTier;
    sourceLabel: string;
    summary: string;
    score?: number;
    stale?: boolean;
    conflict?: string;
    evidenceRefs?: readonly ContextEvidenceRef[];
}
export interface MemoryTierDiagnostic {
    candidateId: string;
    tier: MemoryTier;
    reason: MemoryCandidateDropReason;
}
export interface TieredMemoryPromptResult {
    text: string | undefined;
    includedCount: number;
    omittedCount: number;
    diagnostics: MemoryTierDiagnostic[];
}
export declare function composeTieredMemoryPromptBlock(candidates: readonly MemoryTierCandidate[], budget: MemoryPromptBudget): TieredMemoryPromptResult;
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