Seal vs. a custom database-backed approval queue
A homegrown approval queue is a table, a worker, and a UI — until you need it to be correct under load. The failure modes are the invariants: races between the state change and the audit write, a log that can be edited, and evaluation that fails open on bad input. Seal makes those states unrepresentable and hands you the queue, console, and Slack routing for free.
| Dimension | Seal | A custom approval queue |
|---|---|---|
| Atomic state + audit | One transaction, enforced | Race-prone |
| Append-only log | DB-guarded, hash-chained | Editable table |
| Fail-closed evaluation | Total, never throws | Easy to miss |
| Concurrency control | Row/advisory locks | You design it |
| Reviewer console + Slack | Included | Build both |
A custom queue is fine for a prototype. For anything that has to be provable and correct under concurrency, Seal ships the guarantees you'd otherwise spend months hardening.
Frequently asked questions
What's hard about building an approval queue yourself?+
Not the table — the invariants. The state change and its audit event must commit atomically, the log must be append-only and tamper-evident, and evaluation must fail closed on malformed input under concurrency. Getting all three right and keeping them right is the real cost.
How does Seal prevent race conditions in approvals?+
Seal serializes contended decisions with row and advisory locks and co-commits the status change with its audit event in one transaction, so you never get a status without its audit record or a double-resolve.