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Malte UblandClaude Opus 5.5
dddcbed335
The declaration-typed boundary already reaches zod 4 schemas and hono's
c.req.valid(): zod 4's z.infer and hono's validator Input generics resolve
to plain object types in the declaration world. Three gaps remained:
- Boolean literal types printed as `false` (the TS7 facade leaves
intrinsicName unset), so `{ ok: true } | { ok: false }` lost its true
arm and `boolean | undefined` became `undefined | false`. The printer
reads the literal's value.
- `r.data` after `const r = S.safeParse(x); if (r.success)` never
crossed: zod 4's result union is not data (its error arm is a class),
and reads on projectable receivers were skipped on the assumption that
something else types the receiver. Such reads now cross when the
receiver is a package call whose type does not project, or a const
bound to one.
- Reads through bindings annotated with a projected type no longer get a
redundant cast, and aliases are named only for casts that survive.
New npm cases zod4-boundary and hono-zod-validator run real zod 4.6.7,
hono 4.13.13 and @hono/zod-validator 0.9.1 (vendored file closures) under
Node and natively; decl-boundary.test.ts checks that c.req.valid() is a
checked cast with a path TypeError.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>