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The sandbox is a workbench, not the installed app. Eve and other sandbox agents must return a validated exported artifact; the live sandbox itself is not installed. Treat the live sandbox as not installed in BudsCollab. 
blueprint -> sandbox preview -> exported artifact -> validation -> registry review
Generated projects should never receive BudsCollab secrets or private runtime imports. Static games and custom renderers should export to a sandboxed iframe artifact with a typed host bridge. Sandbox-ready projects should expose the same artifact scripts that Eve uses: 
pnpm run build:budscollab-artifact
pnpm run validate:budscollab-artifact
Those scripts must emit budscollab.blueprint.json, budscollab.package.json, budscollab-app-review.json, budscollab-showcase.json, and SHOWCASE.md. Eve sandbox agents also carry sandbox-sdk-handoff.json. That envelope names the artifacts Eve may return to review, including budscollab-registry-acceptance-request.json, budscollab-registry-publisher-verification.json, budscollab-registry-review-evidence.json, and budscollab-registry-signing-request.json, and budscollab-registry-install-policy.json, and keeps marketplaceInstallAllowed false until a production artifact store, artifact hash, review storage, artifact signing, and host install policy exist. The artifact hash must be stored before any install path opens. They also carry sandbox-artifact-receipt.json. That receipt is local evidence that the sandbox returned validated SDK artifacts, requires a SHA-256 digest policy, and keeps liveSandboxInstallAllowed, marketplaceInstallAllowed, and installableUntilSigned false. It does not claim production artifact storage is implemented. Use pnpm verify:eve:local to check the public Eve sandbox contract and the checked-in Research Bud handoff files when they are present. Use pnpm verify:eve:artifacts ./sandbox-output after a sandbox run to verify that the returned artifact directory contains the handoff, receipt, review, showcase, registry preflight, and signing artifacts before review.