carlos / platform Public

Test-only follow-up on signup checkpoint47d5e8c1 (review221). The one-file delta verifies that removing current step-up after sealing ON refuses account birth atomically, restored freshness permits the same birth, and later OFF survives historical replay. A direct-call AST inventory pins the two existing createAccountTx callers.

Actual bounded Opus review ACCEPT; normal1.799s/race4.091s/vet/format passed. Removing completion freshness and adding a third direct caller both fail the corresponding tests. Inventory aliases/package-level references remain a stated limitation. Exact-tip CI is pending; this branch has not had a separate full local gate. Base47d5 exactCI passed, its local full gate is still running.

No production code change, consumer wiring, billing activation, commercial approval, main merge or deployment. Review the test-only delta47d5e8c1..f71540f0; inherited implementation retains all signup/backend capability, migration rollout and provider holds.