Drop your Managed Agents polling loop — webhooks now emit four `environment.*` and three `memory_store.*` event types
Claude Platform release notes·medium signal
The July 22 platform release extended Managed Agents webhooks to cover environment and memory-store lifecycle, with four `environment.*` and three `memory_store.*` event types, so provisioning and memory state changes no longer need a poller. The same release added `effort` inside the `model` object at agent-creation time and `event_deltas[]` on the per-thread stream endpoint (`GET /v1/sessions/{id}/threads/{thread_id}/stream`), letting you preview a single subagent's text as it generates. Together these replace the three most common polling workarounds in Managed Agents deployments.