# Background workers

The entry is a tick doing expensive work it did not need to do.

## Fact enrichment is a 20-call serial waterfall [#680] {#enrichment}

Costs: each fact is resolved in turn and each ecosystem call can spend ten
seconds. A slow but reachable Nexus holds one tick for minutes, so the worker
stops observing its configured interval. V-647 covered the duplicate queue
scan, not this.
Revisit when: Nexus gets slow, or when a batch-resolution endpoint exists.
Workaround: an unreachable Nexus is fine. It is the slow-but-answering case
that hurts.

## Autonomous worker delegation is temporarily quota-gated [#714] {#agent-quota}

Costs: the completion session can still inspect, implement and verify Maven,
but cannot parallelise independent audits after the three available workers
all returned the shared Codex usage-limit error. This is an orchestration
constraint, not a Maven runtime failure, and no repository workaround can add
worker capacity.
Revisit when: the reported quota window reopens on 2026-08-20, or the account's
worker allowance changes. Until then, keep work streams serial and record the
same verification evidence a delegated review would have produced.
