/** The `agents` service surface the `subagent/start` root walk reads. */
interface AgentsView {
    get(id: string): unknown;
}
/**
 * Root-agent discriminator (the root filter the planMode bridge decides on):
 * `header.parentSession === undefined` ⇒ root-like. Conversation forks also
 * carry `parentSession` (seed lineage) → conservatively excluded (accepted
 * boundary).
 */
export declare function isRootLikeAgent(agent: unknown): boolean;
/**
 * Resolve the ROOT agent of a published child via the `parentSession` walk
 * (upstream `subagent/src/continuation.ts:819-831` precedent): in-process
 * subagent children stamp `header.parentSession` = the parent SESSION id,
 * which IS the parent agent id (a session per agent); the walk stops at the
 * first root-like ancestor. `undefined` when unresolvable (fork lineage,
 * non-in-process provider, registry gap, or a cycle) — the decision point
 * then silently skips. Cycle guard: a `seen` set over visited session ids
 * (the upstream `liveLineage` guard) breaks on ANY revisited id — a 1-hop self-loop, a 2+ hop cycle
 * (A→B→A), or a longer malformed lineage — instead of spinning forever on
 * the synchronous `subagent/start` decision-point listeners (reachable via
 * HMR remounts, resumed/forked sessions with stale headers, or a future
 * host change). The same `subagent/start` decision-point root walk the
 * planMode bridge consumes.
 */
export declare function rootAgentOf(agent: unknown, agents: AgentsView): unknown | undefined;
/**
 * Locate the steering iteration compass (mirror of the engine's
 * `resolveCompassEnforcement` scan + the catalog's `steeringCompassPath`):
 * the FIRST `{ITERATION_DIR}/<id>/delivery-compass.md` whose frontmatter
 * `status` is `active` or `locked` — the directory name IS the iteration id
 * (plan-conventions `{ITERATION_DIR}/<id>/`). Completed/status-less/archived
 * compasses do not steer. Silent on any read failure (advisory degrade).
 * The same "is an active iteration steering" read the planMode bridge consumes.
 * @param harnessDir - the resolved `{HARNESS_DIR}`.
 */
export declare function steeringCompass(harnessDir: string): {
    iterationId: string;
} | undefined;
export {};