import type { AgentMessage } from "@earendil-works/pi-agent-core";
import type { VerbatimCompactionDetails } from "./compaction/compaction-types.js";
import type { CompactionEntry, ContextEditEntry, FileEntry, SessionContext, SessionEntry, SessionProjection, SessionTreeNode } from "./session-manager-types.ts";
/** Index the latest context edit per target among the given entries. */
export declare function collectContextEdits(entries: readonly SessionEntry[]): Map<string, ContextEditEntry>;
/** Apply one append-only context edit to the messages an entry contributes. */
export declare function applyContextEdit(messages: AgentMessage[], edit: ContextEditEntry): AgentMessage[];
export declare function getLatestCompactionBoundaryEntry(entries: SessionEntry[]): CompactionEntry<VerbatimCompactionDetails> | null;
/** Convert one durable session entry into the messages it contributes to model context. */
export declare function sessionEntryToContextMessages(entry: SessionEntry): AgentMessage[];
/** Return the active branch entries after applying the latest compaction boundary. */
export declare function buildContextEntries(entries: SessionEntry[], leafId?: string | null, byId?: Map<string, SessionEntry>): SessionEntry[];
/**
 * Build provenance-preserving, compaction-aware model context.
 *
 * Every entry on the active branch after the latest compaction boundary is projected
 * to the messages it contributes after context edits. The latest verbatim compaction
 * boundary is emitted as one custom-role text message: the compacted string with the
 * kept tail (edits applied) serialized and appended to its end, rather than the tail
 * being replayed as separate structured messages. Kept-tail entries therefore project
 * to no standalone messages of their own.
 */
export declare function buildSessionProjection(entries: SessionEntry[], leafId?: string | null, byId?: Map<string, SessionEntry>): SessionProjection;
/**
 * Build the session context from entries using tree traversal.
 * If leafId is provided, walks from that entry to root.
 * Emits the latest verbatim compaction boundary as one custom-role text message: the
 * compacted string with the kept tail serialized and appended to its end, rather than
 * the tail being replayed as separate structured messages.
 */
export declare function buildSessionContext(entries: SessionEntry[], leafId?: string | null, byId?: Map<string, SessionEntry>): SessionContext;
export interface SessionIndex {
    byId: Map<string, SessionEntry>;
    labelsById: Map<string, string>;
    labelTimestampsById: Map<string, string>;
    leafId: string | null;
}
export declare function buildSessionIndex(fileEntries: FileEntry[]): SessionIndex;
export declare function getBranchPath(fromId: string | null | undefined, byId: Map<string, SessionEntry>): SessionEntry[];
export declare function buildSessionTree(entries: SessionEntry[], labelsById: ReadonlyMap<string, string>, labelTimestampsById: ReadonlyMap<string, string>): SessionTreeNode[];
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