Function observeShape

packages/core/sdk/src/shape-inference.ts:200–219

(
  previous: ObservedShape | null,
  value: unknown,
  now: number,
)

/** Fold a new observation into an existing record, keeping the result bounded. */
export const observeShape = (
  previous: ObservedShape | null,
  value: unknown,
  now: number,
): ObservedShape => {
  const observed = inferShape(value);
  let schema = previous === null ? observed : mergeShapes(previous.schema, observed);
  for (
    let depth = MAX_DEPTH;
    depth > 0 && JSON.stringify(schema).length > MAX_SHAPE_JSON_CHARS;
    depth--
  ) {
    schema = shrink(schema, depth);
  }
  return {
    schema,
    observations: (previous?.observations ?? 0) + 1,
    updatedAt: now,
  };
};