This change enables the strictUnions option in zod-to-json-schema so
that any union members that cannot be resolved are excluded from the
resulting JSON Schema anyOf array.
Previously, a schema like this:
**Before**
```ts
import { zodToJsonSchema } from "zod-to-json-schema";
import { z } from "zod";
console.dir(
zodToJsonSchema(
z.union([
z
.string()
.base64()
.transform((v) => Uint8Array.from(atob(v), (v) => v.charCodeAt(0))),
z.instanceof(ReadableStream<Uint8Array>),
z.instanceof(Blob),
z.instanceof(ArrayBuffer),
z.instanceof(Uint8Array),
])
),
{ depth: null }
);
```
Prints:
```js
{
anyOf: [
{ type: "string", contentEncoding: "base64" }, {}, {}, {}, {}
],
$schema: "http://json-schema.org/draft-07/schema#",
}
```
**After**
```ts
import { zodToJsonSchema } from "zod-to-json-schema";
import { z } from "zod";
console.dir(
zodToJsonSchema(
z.union([
z
.string()
.base64()
.transform((v) => Uint8Array.from(atob(v), (v) => v.charCodeAt(0))),
z.instanceof(ReadableStream<Uint8Array>),
z.instanceof(Blob),
z.instanceof(ArrayBuffer),
z.instanceof(Uint8Array),
]),
{ strictUnions: true }, // 👈
),
{ depth: null }
);
```
Prints:
```js
{
anyOf: [
{ type: "string", contentEncoding: "base64" }
],
$schema: "http://json-schema.org/draft-07/schema#",
}
```
---
I picked this example in particular because I have modelled file uploads
using a permissive schema that accepts streams, byte arrays / blobs and
base64-encoded strings. In the context of MCP, base64 would be most
applicable so I wanted to drop the other union members that couldn't be
represented in JSON Schema.
When launching inspector and changing to use SSE, the URL is set to `http://localhost:3001/sse`. It's quite confusing to have an example use different endpoint names and port, hence the change.
