Upgrade Zod peer dependency to v4#327

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robgruen merged 15 commits into

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copilot/upgrade-to-zod-v4

Jun 1, 2026

Commits on Jun 1, 2026

Initial plan

Copilot
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Initial plan for Zod v4 upgrade

Copilot
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Upgrade to Zod v4: update validate.ts to use v4 API and update peer dependencies

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Fix literal type handling to support Zod v4 multi-value literals

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Add comprehensive unit tests for Zod v4 integration (48 tests covering all type code paths)

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Improve test clarity: add Zod v4 note on array literal, remove unnecessary 'as any' cast

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Define ZodTypeKind type alias for v4 discriminant strings; document discriminated union merging

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Improve validate.ts comments: note z.core is public API; add v3 context for discriminated union merge

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Potential fix for pull request finding

robgruen
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Potential fix for pull request finding

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fix: handle null in z.literal() — emit 'null' instead of 'any'

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Fix optional field description handling, add model tests to npm test, fix appendLiteral for null

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Remove dead appendLiteral helper to eliminate code duplication

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Fix multi-issue error separator in zod validate (newline) and add test
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Merge branch 'main' into copilot/upgrade-to-zod-v4
robgruen
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