/**
 * Port of the forgecode summary transformers.
 *
 * Operates on arrays of `ForgeMessage` (already converted from the opencode
 * payload) and mutates them in place so they can be fed into the
 * `summary-frame` template.
 *
 * Pipeline (matches `forge_app::transformers::SummaryTransformer`):
 *   1. drop(System)
 *   2. dedupeConsecutive(User)
 *   3. trimAssistant (one operation per resource)
 *   4. dedupeConsecutive(Assistant)
 *   5. stripWorkingDir
 */
import type { ForgeMessage, Role } from './types';
/**
 * Drops every message with the given role.
 * Mirrors `DropRole` from forgecode.
 */
export declare function dropRole(messages: ForgeMessage[], role: Role): ForgeMessage[];
/**
 * Keeps only the first message in any consecutive run of the given role, and
 * within that message keeps only the first content entry.
 *
 * Mirrors `DedupeRole` from forgecode (`contents.drain(1..)`).
 */
export declare function dedupeConsecutive(messages: ForgeMessage[], role: Role): ForgeMessage[];
/**
 * Within each assistant message, keep only the last tool call per
 * (operation-type, resource) pair. Mirrors `TrimContextSummary`.
 */
export declare function trimAssistant(messages: ForgeMessage[]): ForgeMessage[];
/**
 * Strip the working directory prefix from file paths inside tool calls.
 * Handles both POSIX and Windows paths so summaries remain portable.
 */
export declare function stripWorkingDir(messages: ForgeMessage[], workingDir: string): ForgeMessage[];
/**
 * Full transformer pipeline used by the compactor.
 */
export declare function summaryTransform(messages: ForgeMessage[], workingDir: string): ForgeMessage[];
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