/**
 * Post-parse integrity checks:
 *   - Connector from/to references known node ids
 *   - Note targets reference known node or connector ids
 *   - Region spans fit within cols×rows
 *   - Region spans form a single 4-connected shape (no diagonal-only joins)
 *   - Cell occupancy: at most one node-or-note per cell after auto-layout
 *
 * At this point the DiagramDef carries the raw user-input coordinates
 * (1-based / A1 forms). We normalize a temporary copy here so the
 * checks can reason in canonical 0-based space without mutating the
 * def that render-time foldLayers will later re-normalize.
 *
 * Duplicate-node-id detection happens in parser.ts because it needs to
 * see source attribution (DSL vs JSON) at parse time.
 */
import type { DiagramDef } from '../types.js';
import type { GgError } from './errors.js';
/**
 * Run the integrity checks against a diagram. When `frame` is given,
 * checks that specific frame only. When omitted, checks every frame
 * number explicitly referenced by the declarations (at least frame 1)
 * so errors that only manifest at frame N — e.g. two icons at the
 * same cell at frame 3 — are caught at parse time rather than
 * silently accepted until someone renders `--frame 3`.
 *
 * Duplicate messages across frames are deduplicated; frame-specific
 * errors are annotated with `(frame N)` so the reader can tell which
 * frame to look at.
 */
export declare function checkIntegrity(rawDef: DiagramDef, frame?: number): GgError[];
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