build: migrate Vitest and ESLint major versions#473
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Upgrade the test and lint toolchains to their current major releases. Migrate Vitest mock constructors and pool configuration so unit, snapshot, and smoke configurations load cleanly under Vitest 4, and align TypeScript imports and lint compatibility with ESLint 10. Co-Authored-By: OpenAI Codex <noreply@openai.com>
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Carry the remaining dependency refresh from the grouped Dependabot update into the migration PR so the vulnerable wireit dependency is upgraded alongside the Vitest and ESLint changes. Co-Authored-By: OpenAI Codex <noreply@openai.com>
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Use the supported maxWorkers option in every Vitest configuration so the existing concurrency limits remain effective after the Vitest 4 migration. Co-Authored-By: OpenAI Codex <noreply@openai.com>
This was referenced Jul 12, 2026
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Vitest 4 and ESLint 10 now run cleanly with the repository's current test and lint setup. The migration updates the compatible TypeScript ESLint stack, moves all Vitest pool settings to the Vitest 4 configuration shape, and replaces non-constructible mocked classes with constructible test doubles. It also aligns the affected TypeScript imports and empty-interface syntax with the upgraded lint rules.\n\nThe branch is ready for CI review. Warden still requires the repository's WARDEN_MODEL secret to be set in provider/model format; that is an external repository configuration prerequisite, not a code change in this PR.