# Telemetry Rate Limiting

`@v2/telemetry-rate-limiting` applies deterministic per-session sampling and
per-session/topic token-bucket limits to telemetry batches before high-volume
events enter production analytics paths.

Critical override topics bypass sampling and rate limits. High-frequency topics
such as UI interactions receive lower sampling and tighter token buckets, while
required session/error/purchase facts stay effectively unsampled unless a
deployment overrides the policy.

Targeted verification:

```bash
pnpm --filter @v2/telemetry-rate-limiting run typecheck
pnpm --filter @v2/telemetry-rate-limiting run test
python V2/ue/Tools/check-v2-telemetry-rate-limiting.py
```