[bluayer]

What and why

Members reported every 30 seconds, and two things followed from that:

• Late shortages. A shortage seen only in signals (latency, saturation) reached the hub up to 30 seconds late. A Deployment change, such as KEDA scaling up, already triggered a report immediately.
• Slow traffic steps. The hub moves traffic a step only after both members have reported since the last step. This guard keeps traffic from bouncing on stale readings. Since Prometheus signals refresh only on the interval, traffic moved about one step every 30 seconds, whatever cooldown said.

In the AWS comparison, a queue-based controller with a 10-second loop recovered sooner where a ready replica was waiting in the other cluster.

Change

• The default --interval (Helm agent.interval) goes from 30s to 10s, the same as the hub's.
• The wait for fresh reports stays. Members just report more often.
• Cost: each report runs the policy's Prometheus queries and writes its status once. That is one status patch per policy per member every 10 seconds.
• Docs: docs/configuration.md (chart value and flag rows; the value row now explains that it paces traffic steps) and the comment in values.yaml.

Not a duplicate

This came from comparing reaction times with the experiment's queue-based controller. No issue or PR covers it.

How it was tested

• go test ./cmd/... ./internal/controller/ passes, make lint reports 0 issues, and make chart passes.
• No planning code changes. The e2e suite already runs members at a 1-second interval.

Checklist

• make test lint verify-generate verify-mod passes
• Every commit is signed off (git commit -s, DCO)
• AI assistance, if any, is stated here and in commit trailers, and I reviewed every changed line. Written with Claude Code; the commit carries a Co-authored-by: Claude trailer.
• New behavior works in shadow mode first, and hub decisions are recorded in the decision log (default change only)
• Strings from other projects (Karpenter, KEDA, Gateway API, model hosts, …) are copied from source with a comment naming it (n/a)
• Docs updated (docs/, chart values, CRD field comments)

🤖 Generated with Claude Code