/**
 * daemon/todoist-projects.ts — the project tree, cached.
 *
 * Needed because ingress can be granted to a subtree: a project that is not
 * itself listed may still be reachable through an ancestor that is. Answering
 * that requires knowing who a project's parent is, which is not in the webhook
 * payload.
 *
 * Cached with a short TTL rather than fetched per event. A webhook arrives in
 * bursts — a task added, a label applied, a comment posted, all within seconds —
 * and one project listing per event is exactly the kind of load that produced
 * the 401 bursts that cost two claims on 2026-08-01.
 *
 * Everything here keys on ID, never on name. Todoist's project search returns
 * nothing for names containing emoji, so "Archive 🎯" is invisible to a
 * name query — a resolver that fell back to matching names would silently find
 * no project and report it as absent rather than unsearchable.
 */
export interface ProjectNode {
    id: string;
    name: string;
    parentId?: string;
}
/** Drop the cache — used after a grant, and by tests. */
export declare function invalidateProjectTree(): void;
export declare function projectTree(fetchImpl?: typeof fetch): Promise<Map<string, ProjectNode>>;
/**
 * The chain from a project up to the root, nearest ancestor first.
 *
 * Depth-capped: a cycle in the data would otherwise hang the receiver, and a
 * hung receiver is indistinguishable from a webhook that never arrived.
 */
export declare function ancestorsOf(projectId: string, tree: Map<string, ProjectNode>, maxDepth?: number): string[];
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