chore: Update examples to use zod/v4 imports

[yokotaso]

Summary

This PR updates all example code to use zod/v4 imports instead of the default zod import, preparing for Zod v4 compatibility.

Changes

• Updated all import z from "zod" to import z from "zod/v4" in example files
• Changed .openapi() to .meta() method for OpenAPI metadata (aligning with Zod v4 API changes)
• Updated examples in:
  • examples/misc/express/zod/openapi/
  • examples/misc/fastify/zod/
  • examples/misc/simple/
  • examples/misc/spec/
  • examples/vite/src/github/

Context

Zod v4 introduces a new import path (zod/v4) that allows gradual migration. This PR updates the examples to demonstrate best practices for using typed-api-spec with Zod v4, while maintaining backward compatibility through peer dependencies.

Breaking Changes

None - this only affects example code and does not change the library's API.

Related

• Builds on feat: upgrade typed-api-spec to support express@5 and @types/express@5 #166 (Express 5 support)
• Package peer dependencies already support zod ^3.25.74 which includes the v4 import path

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This PR updates all example and test code to use the zod/v4 import path instead of the default zod import, and updates package dependencies to support Zod v4. The changes also include updating test assertions to match Zod v4's new error message formats and changing .openapi() method calls to .meta() to align with Zod v4 API changes.

• Updated all import z from "zod" to import z from "zod/v4" across examples and tests
• Changed .openapi() method to .meta() for OpenAPI metadata
• Updated error message assertions in tests to match Zod v4's error format
• Upgraded dependencies including zod, fastify-type-provider-zod, and zod-openapi

Reviewed changes

Copilot reviewed 17 out of 18 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
pkgs/typed-api-spec/src/msw/http.test.ts	Updated zod import path in MSW test file
pkgs/typed-api-spec/src/fetch/validation.no-test.ts	Updated commented-out zod import in validation test
pkgs/typed-api-spec/src/fetch/index.t-test.ts	Updated zod import path in fetch type test
pkgs/typed-api-spec/src/express/zod.test.ts	Updated zod import and error message assertions for v4 compatibility
pkgs/typed-api-spec/src/core/schema.t-test.ts	Updated zod import path in core schema type test
pkgs/typed-api-spec/src/core/openapi/openapi-zod.test.ts	Updated zod import, removed zod-openapi extend, added additionalProperties flags
pkgs/typed-api-spec/package.json	Upgraded zod, fastify-type-provider-zod, and zod-openapi dependencies
pkgs/docs/docs/06_validation/zod.md	Updated zod import in documentation examples
pkgs/docs/docs/06_validation/concept.md	Updated zod import in validation concept documentation
pkgs/docs/docs/05_server/msw.md	Updated zod import in MSW server documentation
pkgs/docs/docs/05_server/express.md	Updated zod import in Express server documentation
pkgs/docs/docs/03_api-specification.md	Updated zod import in API specification documentation
examples/vite/src/github/spec.ts	Updated zod import in Vite example
examples/misc/spec/zod.ts	Updated zod import in spec example
examples/misc/simple/withValidation.ts	Updated zod import in validation example
examples/misc/fastify/zod/fastify.ts	Updated ZodError import in Fastify example
examples/misc/express/zod/openapi/index.ts	Updated zod import and changed .openapi() to .meta()

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[Copilot]

The removal of import \"zod-openapi/extend\" may break OpenAPI metadata generation functionality. If zod-openapi v5 still requires this import for extending zod with OpenAPI capabilities, it should be retained.

Suggested change

	import z from "zod/v4";
	import z from "zod/v4";
	import "zod-openapi/extend";

[shinagawa-web]

@yokotaso
LGTMです！