TilingNodeSchema

const TilingNodeSchema: ZodPipe<ZodNullable<ZodString>, ZodTransform<"H" | "V" | `H:${string}` | `V:${string}` | `ID:${string}` | null, string | null>>

Defined in: packages/protocol/src/lib/schemas.ts:133

A node in the tiling tree: a split token, an ID:-prefixed leaf, or null. Tokens keep the spelling they arrived with.

A malformed weight suffix still passes — "H:2,x" is a split whose weights are repaired downstream by parseTilingSplitToken, because rejecting it costs a model round trip over something the tree’s shape survives. A token belonging to no class is refused instead: it has no shape to survive, and the only alternatives are guessing which class it meant or letting it stand as empty space, which turns a mis-spelled layout into a blank Chart with nothing said about it.

The refusal is ctx.addIssue inside the transform rather than a throw. A throw raised in a Zod transform escapes safeParse instead of becoming an issue, which would turn careless model output into an uncaught error at whichever boundary parsed it.