Bun-native test runner support

[truthixify]

Continues work from a Wave 6 issue that was closed at wave wrap-up. Fresh assignments welcome.

Extra labels: test, compat
Tier: M (2-4 days) | Type: test + compat

Context. Wave 6 attempt didn't land. Bun's runner is measurably faster and gives us a second interpreter to catch env-specific bugs.

Scope.

• Audit for Vitest-only APIs.
• Add compat shims where possible; skip with a documented reason where not.
• New bun-test job in .github/workflows/ci.yml matrix.
• test/README.md explains the vitest-vs-bun scope.

Acceptance.

• bun test completes locally + in CI
• Vitest still green (unchanged)
• Both runners run in parallel matrix

Files. vitest.config.ts, package.json scripts, .github/workflows/ci.yml, test/README.md.

[Hollujay]

I would like to work on this issue because I will get it done

[heymariam]

@heymariam has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello Maintainer,

I’d like to work on this issue. I’ll add Bun test runner support by auditing Vitest-specific usage, introducing compatibility shims where possible, updating CI to run both Bun and Vitest in parallel, and documenting the supported scope and differences between the two runners.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @heymariam to this issue.

[drips-wave]

Congratulations, @heymariam! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @heymariam: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

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🌊 Happy Wave 🌊