Update vitest to v4

[Hoishin]

Type

• Refactor
• Feature
• Bug Fix
• Optimization
• Documentation Update

Description

Update and support Vitest v4

Related

• Related Issue #
• Closes #

[changeset-bot]

🦋 Changeset detected

Latest commit: 01ec940

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

This PR includes changesets to release 36 packages

Name	Type
@effect/opentelemetry	Major
effect	Minor
@effect/vitest	Major
@effect/cli	Major
@effect/cluster	Major
@effect/experimental	Major
@effect/platform-browser	Major
@effect/platform-bun	Major
@effect/platform-node-shared	Major
@effect/platform-node	Major
@effect/platform	Major
@effect/printer-ansi	Major
@effect/printer	Major
@effect/rpc	Major
@effect/sql-clickhouse	Major
@effect/sql-d1	Major
@effect/sql-drizzle	Major
@effect/sql-kysely	Major
@effect/sql-libsql	Major
@effect/sql-mssql	Major
@effect/sql-mysql2	Major
@effect/sql-pg	Major
@effect/sql-sqlite-bun	Major
@effect/sql-sqlite-do	Major
@effect/sql-sqlite-node	Major
@effect/sql-sqlite-react-native	Major
@effect/sql-sqlite-wasm	Major
@effect/sql	Major
@effect/typeclass	Major
@effect/workflow	Major
@effect/ai	Major
@effect/ai-amazon-bedrock	Major
@effect/ai-anthropic	Major
@effect/ai-google	Major
@effect/ai-openai	Major
@effect/ai-openrouter	Major

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[Hoishin]

Tests are failing even on main branch on my laptop, so I'm checking on CI if there is any failures

[Copilot]

Pull request overview

This PR updates Vitest from v3 to v4, modernizing the test infrastructure and aligning with the latest Vitest APIs and configuration patterns.

Key Changes:

• Vitest and all related packages updated from v3.2.4 to v4.0.12
• Configuration migrated from deprecated vitest.workspace.ts to projects option in vitest.config.ts
• Package @vitest/runner added as new peer dependency for type definitions
• Test utilities updated to use Vitest v4's assert API

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
vitest.workspace.ts	Removed in favor of inline projects configuration
vitest.shared.ts	Simplified by moving most config to main vitest.config.ts
vitest.config.ts	New centralized config file with projects array for workspace support
pnpm-lock.yaml	Updated all vitest-related dependencies from v3.2.4 to v4.0.12
packages/vitest/src/utils.ts	Updated to use Vitest v4's assert API, removed node:assert dependency
packages/vitest/src/index.ts	Added @vitest/runner types import, simplified TestCollectorCallable interface
packages/vitest/package.json	Updated peer dependencies to vitest ^4.0.0 and added @vitest/runner ^4.0.0
package.json	Updated root devDependencies for all @vitest/* packages to ^4.0.12
.changeset/tiny-windows-ring.md	Documents the vitest v4 support as a minor change

Files not reviewed (1)

• pnpm-lock.yaml: Language not supported

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