/**
 * Collapse (progress §6): the projected tree flattened into exactly the rows worth drawing.
 *
 * Three rules, and the reason each earns its lines:
 *
 *  - **A completed construct folds to one summary row** (§6.1). Its detail has stopped being
 *    actionable — nothing in it can change again — and it is not lost: the log holds it and
 *    `/workflow status` (§11.4) prints it in full. The panel shrinks exactly when it should.
 *  - **A construct that has not started is one `○` row** (§6.3). Expanding structure that may never run
 *    — an untaken branch arm above all — is noise dressed as information.
 *  - **Everything else stays expanded** (§6.2), which is what keeps the active path visible root to
 *    leaf, together with the siblings of whatever is running: the only region a user can act on, and
 *    so the only region that pays for its lines.
 *
 * There is no line budget (§6.5, deferred): a cap is a mechanism with a tuning problem attached, and
 * the three rules above keep a realistic run comfortably small without one.
 *
 * Pure — no PI, no `node:fs`, no clock (progress §2.1).
 */
import type { ProgressRow, ProgressView } from "./types.ts";
/** Flatten a view into the rows a render draws, applying progress §6.1–§6.3. */
export declare function collapse(view: ProgressView): ProgressRow[];
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