/**
 * Issues a fix surfaced somewhere else.
 *
 * A fix that clears its own defect and causes a different one is not that
 * issue regressing. It is a new defect, and lookout files new defects the way
 * it files every other one: its own number, its own folder, its own evidence.
 * What this adds is the provenance, which the merge cannot know: which fix was
 * in flight when the defect first appeared.
 *
 * Kept pure and apart from the verb so the rule can be argued with in a test.
 * The rule that matters: a finding on a screenshot whose pixels did not move
 * cannot have been caused by anything that ran. It still becomes an issue; it
 * just is not attributed to the fix, because attributing it would be a guess
 * dressed as a record.
 */
import type { Backlog } from "../backlog/lib.js";
import type { FixCluster } from "../fix/cluster.js";
export interface SpawnedIssue {
    issue: FixCluster;
    /** True when its evidence sits on a screenshot this run actually changed. */
    causedByThisFix: boolean;
}
/** Issues present after this run that were not present before it. */
export declare function spawnedIssues(before: Backlog, after: Backlog, changedShotIds: ReadonlySet<string>, excludeIssueId?: string): SpawnedIssue[];
/**
 * Record where a spawned issue came from. Only the ones on changed pixels, and
 * only once: the first fix that surfaced a defect is the one that surfaced it,
 * and a later re-check must not rewrite that.
 */
export declare function stampCausedBy(after: Backlog, spawned: SpawnedIssue[], by: {
    issue: string;
    commit: string | null;
    runId: string;
    at: string;
}): string[];