Update non-major dependencies

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
typescript-eslint (source)	8.50.1 → 8.51.0
zod (source)	4.2.1 → 4.3.4

---

Release Notes

typescript-eslint/typescript-eslint (typescript-eslint)

v8.51.0

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This was a version bump only for typescript-eslint to align it with other projects, there were no code changes.

You can read about our versioning strategy and releases on our website.

colinhacks/zod (zod)

v4.3.4

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Commits:

• 1a8bea3 Add integration tests
• e01cd02 Support patternProperties for looserecord (#​5592)
• 089e5fb Improve looseRecord docs
• decef9c Fix lint
• 9443aab Drop iso time in fromJSONSchema
• 66bda74 Remove .refine() from ZodMiniType
• b4ab94c 4.3.4

v4.3.3

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v4.3.2

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v4.3.1

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Commits:

• 0fe8840 allow non-overwriting extends with refinements. 4.3.1

v4.3.0

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This is Zod's biggest release since 4.0. It addresses several of Zod's longest-standing feature requests.

z.fromJSONSchema()

Convert JSON Schema to Zod (#​5534, #​5586)

You can now convert JSON Schema definitions directly into Zod schemas. This function supports JSON Schema "draft-2020-12", "draft-7", "draft-4", and OpenAPI 3.0.

import * as z from "zod";

const schema = z.fromJSONSchema({
  type: "object",
  properties: {
    name: { type: "string", minLength: 1 },
    age: { type: "integer", minimum: 0 },
  },
  required: ["name"],
});

schema.parse({ name: "Alice", age: 30 }); // ✅

The API should be considered experimental. There are no guarantees of 1:1 "round-trip soundness": MySchema > z.toJSONSchema() > z.fromJSONSchema(). There are several features of Zod that don't exist in JSON Schema and vice versa, which makes this virtually impossible.

Features supported:

• All primitive types (string, number, integer, boolean, null, object, array)
• String formats (email, uri, uuid, date-time, date, time, ipv4, ipv6, and more)
• Composition (anyOf, oneOf, allOf)
• Object constraints (additionalProperties, patternProperties, propertyNames)
• Array constraints (prefixItems, items, minItems, maxItems)
• $ref for local references and circular schemas
• Custom metadata is preserved

z.xor() — exclusive union (#​5534)

A new exclusive union type that requires exactly one option to match. Unlike z.union() which passes if any option matches, z.xor() fails if zero or more than one option matches.

const schema = z.xor([z.string(), z.number()]);

schema.parse("hello"); // ✅
schema.parse(42);      // ✅
schema.parse(true);    // ❌ zero matches

When converted to JSON Schema, z.xor() produces oneOf instead of anyOf.

z.looseRecord() — partial record validation (#​5534)

A new record variant that only validates keys matching the key schema, passing through non-matching keys unchanged. This is used to represent patternProperties in JSON Schema.

const schema = z.looseRecord(z.string().regex(/^S_/), z.string());

schema.parse({ S_name: "John", other: 123 });
// ✅ { S_name: "John", other: 123 }
// only S_name is validated, "other" passes through

.exactOptional() — strict optional properties (#​5589)

A new wrapper that makes a property key-optional (can be omitted) but does not accept undefined as an explicit value.

const schema = z.object({
  a: z.string().optional(),      // accepts `undefined`
  b: z.string().exactOptional(), // does not accept `undefined`
});

schema.parse({});                  // ✅
schema.parse({ a: undefined });    // ✅
schema.parse({ b: undefined });    // ❌

This makes it possible to accurately represent the full spectrum of optionality expressible using exactOptionalPropertyTypes.

.apply()

A utility method for applying arbitrary transformations to a schema, enabling cleaner schema composition. (#​5463)

const setCommonChecks = <T extends z.ZodNumber>(schema: T) => {
  return schema.min(0).max(100);
};

const schema = z.number().apply(setCommonChecks).nullable();

.brand() cardinality

The .brand() method now accepts a second argument to control whether the brand applies to input, output, or both. Closes #​4764, #​4836.

// output only (default)
z.string().brand<"UserId">();           // output is branded (default)
z.string().brand<"UserId", "out">();    // output is branded
z.string().brand<"UserId", "in">();     // input is branded
z.string().brand<"UserId", "inout">();  // both are branded

Type predicates on .refine() (#​5575)

The .refine() method now supports type predicates to narrow the output type:

const schema = z.string().refine((s): s is "a" => s === "a");

type Input = z.input<typeof schema>;   // string
type Output = z.output<typeof schema>; // "a"

ZodMap methods: min, max, nonempty, size (#​5316)

ZodMap now has parity with ZodSet and ZodArray:

const schema = z.map(z.string(), z.number())
  .min(1)
  .max(10)
  .nonempty();

schema.size; // access the size constraint

.with() alias for .check() (359c0db)

A new .with() method has been added as a more readable alias for .check(). Over time, more APIs have been added that don't qualify as "checks". The new method provides a readable alternative that doesn't muddy semantics.

z.string().with(
  z.minLength(5),
  z.toLowerCase()
);

// equivalent to:
z.string().check(
  z.minLength(5),
  z.trim(),
  z.toLowerCase()
);

z.slugify() transform

Transform strings into URL-friendly slugs. Works great with .with():

// Zod
z.string().slugify().parse("Hello World");           // "hello-world"

// Zod Mini
// using .with() for explicit check composition
z.string().with(z.slugify()).parse("Hello World");   // "hello-world"

z.meta() and z.describe() in Zod Mini (947b4eb)

Zod Mini now exports z.meta() and z.describe() as top-level functions for adding metadata to schemas:

import * as z from "zod/mini";

// add description
const schema = z.string().with(
  z.describe("A user's name"),
);

// add arbitrary metadata
const schema2 = z.number().with(
  z.meta({ deprecated: true })
);

New locales

• Armenian (am) (#​5531)
• Uzbek (uz) (#​5519)

import * as z from "zod";
import { uz } from "zod/locales";

z.config(uz());

---

Bug fixes

All of these changes fix soundness issues in Zod. As with any bug fix there's some chance of breakage if you were intentionally or unintentionally relying on this unsound behavior.

⚠️ .pick() and .omit() disallowed on object schemas containing refinements (#​5317)

Using .pick() or .omit() on object schemas with refinements now throws an error. Previously, this would silently drop the refinements, leading to unexpected behavior.

const schema = z.object({
  password: z.string(),
  confirmPassword: z.string(),
}).refine(data => data.password === data.confirmPassword);

schema.pick({ password: true });
// 4.2: refinement silently dropped ⚠️
// 4.3: throws error ❌

Migration: The easiest way to migrate is to create a new schema using the shape of the old one.

const newSchema = z.object(schema.shape).pick({ ... })

⚠️ .extend() disallowed on refined schemas (#​5317)

Similarly, .extend() now throws on schemas with refinements. Use .safeExtend() if you need to extend refined schemas.

const schema = z.object({ a: z.string() }).refine(/* ... */);

// 4.2: refinement silently dropped ⚠️
// 4.3: throws error ✅
schema.extend({ b: z.number() });
// error: object schemas containing refinements cannot be extended. use `.safeExtend()` instead.

⚠️ Stricter object masking methods (#​5581)

Object masking methods (.pick(), .omit()) now validate that the keys provided actually exist in the schema:

const schema = z.object({ a: z.string() });

// 4.3: throws error for unrecognized keys
schema.pick({ nonexistent: true });
// error: unrecognized key: "nonexistent"

Additional changes

• Fixed JSON Schema generation for z.iso.time with minute precision (#​5557)
• Fixed error details for tuples with extraneous elements (#​5555)
• Fixed includes method params typing to accept string | $ZodCheckIncludesParams (#​5556)
• Fixed numeric formats error messages to be inclusive (#​5485)
• Fixed implementAsync inferred type to always be a promise (#​5476)
• Tightened E.164 regex to require a non-zero leading digit and 7–15 digits total (#​5524)
• Fixed Dutch (nl) error strings (#​5529)
• Convert Date instances to numbers in minimum/maximum checks (#​5351)
• Improved numeric keys handling in z.record() (#​5585)
• Lazy initialization of ~standard schema property (#​5363)
• Functions marked as @__NO_SIDE_EFFECTS__ for better tree-shaking (#​5475)
• Improved metadata tracking across child-parent relationships (#​5578)
• Improved locale translation approach (#​5584)
• Dropped id uniqueness enforcement at registry level (#​5574)

---

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---

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---

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[github-actions]

Updated both pr-review and pr-summary packages to use Zod v4.3.4 and TypeScript-ESLint v8.51.0, bringing in the latest type validation improvements and linting enhancements without affecting end-user functionality.

Walkthrough

• Chore: Bumped Zod from 4.2.1 to 4.3.4 to leverage updated parsing and validation fixes
• Chore: Upgraded TypeScript-ESLint from 8.50.1 to 8.51.0 for improved linting rules and bug resolutions

_{Model: o4-mini-2025-04-16 | Prompt Tokens: 540 | Completion Tokens: 589}

[github-actions]

Here is a supportive code review powered by AI. Insights are based on predictions, not guaranteed truths, so apply what best suits your project. You guide the journey; AI is here to help you refine your work.
_{Model: o4-mini-2025-04-16 | Prompt Tokens: 1056 | Completion Tokens: 2268}

[github-actions]

Consider using a semver range operator such as ^ for the zod dependency to automatically receive patch updates while keeping the current major version. This can reduce the need for manual updates when only patch releases are published.

Suggested snippet:

"zod": "^4.3.4"

[github-actions]

Similarly, use a semver range operator for typescript-eslint to capture patch and minor releases automatically. For example:

"typescript-eslint": "^8.51.0"

[github-actions]

Consider adopting the caret semver range for zod to allow patch updates by default:

"zod": "^4.3.4"

[github-actions]

Use a semver range operator for typescript-eslint to automatically include future patch and minor updates without manual bumps:

"typescript-eslint": "^8.51.0"