Upgrade to Zod 4 #14956

matthewp · 2025-12-03T21:56:00Z

Changes

A lot of use of .prefault() and changing z.object(z.number()) to z.object(z.string(), z.number())

Testing

Existing tests pass
Most significant changes here are because error messages are a little different in Zod 4.

Docs

Upgrade guide: Add section on Zod 4 to v6 migration guide docs#12848

Consolidate Zod v3 to v4 upgrade with comprehensive changes: - Remove dual Zod version support, standardize on v4 - Simplify type systems and remove experimental.zod4 flag - Update dependencies: js-yaml, magic-string, magicast to latest versions - Replace kleur with piccolore for CLI colors - Refactor content layer, actions, and config to use unified Zod handling - Simplify JSON schema generation and type generation - Remove z3/z4 branching logic throughout codebase - Update error handling to work with unified Zod implementation BREAKING CHANGE: Zod v3 support removed, project now requires Zod v4+

- Remove all z3 imports and replace with z4/zod - Remove z3-specific functions (formDataToZ3Object, handleZ3FormDataGetAll/Get, unwrapBaseZ3ObjectSchema, createZ3Image) - Remove dual-version type unions, simplify to z4-only types - Remove z3ErrorMap function, keep only z4ErrorMap - Remove checkZodSchemaCompatibility calls (no longer needed) - Simplify vite-plugin-experimental-zod4/utils.ts to no-op - Update package.json to require zod ^4.0.0 - Update test files and exports to reference z4 versions

changeset-bot · 2025-12-03T21:56:05Z

🦋 Changeset detected

Latest commit: d10cb61

The changes in this PR will be included in the next version bump.

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Click here if you're a maintainer who wants to add another changeset to this PR

examples/blog/astro.config.mjs

Co-authored-by: Florian Lefebvre <[email protected]>

github-actions · 2025-12-08T17:24:18Z

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ematipico · 2025-12-08T22:56:27Z

Is the bot incorrect? #14956 (comment)

florian-lefebvre

Only some small things. Some of my older reviews need to be addressed still

packages/astro/src/content/config.ts

packages/astro/src/content/utils.ts

packages/astro/src/core/config/schemas/base.ts

packages/astro/src/core/errors/errors-data.ts

packages/astro/src/core/base-pipeline.ts

packages/astro/src/env/schema.ts

florian-lefebvre · 2025-12-09T15:10:39Z

So the missing things to address are:

Upgrade to Zod 4 #14956 (comment)
Upgrade to Zod 4 #14956 (comment)
Upgrade to Zod 4 #14956 (comment)
Upgrade to Zod 4 #14956 (comment)
Upgrade to Zod 4 #14956 (comment)
Make sure there's no zod import (last time I checked locally, some were still there)
Make sure we have changesets for all affected packages

delucis · 2025-12-09T17:27:49Z

Is the bot incorrect? #14956 (comment)

I think it’s not working correctly currently: we need e18e/action-dependency-diff#95 which isn’t released yet. I’ve asked if they can release that. If not, I’ll send a PR pinning to that commit hash directly.

matthewp added 3 commits December 2, 2025 14:45

Finish upgrade

0bb5419

github-actions bot added pkg: example Related to an example package (scope) pkg: astro Related to the core `astro` package (scope) docs pr labels Dec 3, 2025

matthewp added 11 commits December 3, 2025 16:59

Merge branch 'next' into zod4-m

c78a21e

skip these tests for now

9fdfe72

skip this one too

be4e226

correct mark the received item

11766e1

fix config-validate tests

beb8c67

Merge branch 'next' into zod4-m

45b6c46

merge: resolve conflicts between zod4-m and next

085e663

fix remaining build error

19a3c1b

remove references to zod4 thing

94f42c1

fixes

86b54be

prevent the crash

59e5cdf

github-actions bot added pkg: svelte Related to Svelte (scope) pkg: integration Related to any renderer integration (scope) labels Dec 4, 2025

matthewp added 7 commits December 4, 2025 15:17

switch to the native zod to json schema

bb8f885

oops

1ae84f2

fix content layer tests

8084da5

fix error map tests

62edc31

fix actions test

ef994e5

fix intellisense tsts

4f005eb

fix schema test

2ddd549

florian-lefebvre added this to the v6.0.0 milestone Dec 5, 2025

fix: types

215afa0

matthewp commented Dec 5, 2025

View reviewed changes

examples/blog/astro.config.mjs Outdated Show resolved Hide resolved

matthewp and others added 17 commits December 8, 2025 11:24

Update packages/astro-rss/src/schema.ts

dd9eadb

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro-rss/src/util.ts

8c18e1e

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/src/assets/fonts/config.ts

12485ed

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/src/assets/fonts/types.ts

1e084d2

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/src/content/loaders/types.ts

bd8aecf

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/src/content/config.ts

fc02d97

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/src/core/config/schemas/relative.ts

2d8ea90

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/test/units/config/config-validate.test.js

16843f6

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/test/units/actions/form-data-to-object.test.js

c618507

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/src/core/config/schemas/refined.ts

0422b86

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/src/content/content-layer.ts

d8ede75

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/src/content/types-generator.ts

e34b316

Co-authored-by: Florian Lefebvre <[email protected]>

Update packages/astro/src/content/utils.ts

a70b1fc

Co-authored-by: Florian Lefebvre <[email protected]>

Use $ZodError

7edf39c

Update packages/astro/src/core/csp/config.ts

df3795b

Co-authored-by: Florian Lefebvre <[email protected]>

fix the build

89692d3

Merge branch 'zod4-m' of github.com:withastro/astro into zod4-m

219d2cb

matthewp added 3 commits December 8, 2025 13:03

fix e2e test

1f422e3

replace z4 with z

c64836d

increase vercel test timeout

be58ac5

florian-lefebvre reviewed Dec 9, 2025

View reviewed changes

matthewp added 2 commits December 9, 2025 08:50

pr comments

3570d2a

export ImageFunction

c346cb4

matthewp added 3 commits December 9, 2025 12:35

use prefault

11b3dc1

Validate experimental features special

f6bfd6c

bring back old locales

d10cb61

Provide feedback

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