/**
 * Pull plain-text user/assistant messages out of a session manager.
 *
 * The Hindsight retain/recall API only takes flat `{role, content}` records,
 * so we drop tool calls, tool results, bash execution wrappers, custom
 * messages, and anything else that isn't a primary conversation turn. Each
 * surviving message's `TextContent` parts are joined with newlines.
 */
import type { SessionEntry } from "../session/session-manager";
import type { HindsightMessage } from "./content";
export interface ReadonlySessionManagerLike {
    getEntries(): SessionEntry[];
}
/**
 * Walk session entries top-to-bottom, returning a flat user/assistant list.
 *
 * Implementation choices:
 * - Skip entries whose type isn't `"message"` (compaction, branch_summary,
 *   custom_message, tool exec records, ...). Those don't represent a
 *   conversational turn, only the LLM's plain-text utterances do.
 * - Skip messages whose role isn't `"user"` or `"assistant"`. We deliberately
 *   ignore `toolResult`, `bashExecution`, `hookMessage`, etc. — they're noise
 *   for memory purposes.
 * - For assistant messages, only `text` blocks contribute. Thinking and
 *   toolCall blocks are intentionally dropped: the user never saw them, so
 *   retaining them would prime recall on internal monologue.
 */
export declare function extractMessages(sessionManager: ReadonlySessionManagerLike): HindsightMessage[];