Prefect Files

New Features 🎉

• Add Submitting and InfrastructurePending states and emit from BaseWorker by @desertaxle in #20964
• Add OS-level resource metric collection to flow run subprocesses by @desertaxle in #21071

Enhancements ➕➕

• Add end_time filter support for flow and task runs by @jellyfish0316 in #21013
• Use hmac.compare_digest for auth token comparisons by @bunchesofdonald in #21072
• Use cyclopts native lazy loading for CLI commands by @zzstoatzz in #21017
• Extend flow_run_logger to accept a bare flow_run_id UUID by @devin-ai-integration[bot] in #21019
• Improve worker lifecycle logs and use exit code registry by @desertaxle in #20990
• Add deployment step lifecycle logs and error resolution hints by @devin-ai-integration[bot] in #21020
• Change heartbeat default from None to 180s by @bunchesofdonald in #21058

Bug Fixes 🐞

• Handle FlowRunCancellingObserver subscriber connection failure gracefully by @devin-ai-integration[bot] in #21039
• Fix postgres_listener ssl query param causing CantChangeRuntimeParamError by @devin-ai-integration[bot] in #21040
• Add retry logic to concurrency lease renewal loop by @chuqCTC in #21065
• Add server version check for websocket clients by @devin-ai-integration[bot] in #21053
• Preserve explicit result storage during ad-hoc submission by @zzstoatzz in #21038
• Fix CANCEL_NEW strategy not cancelling late runs when limit is full by @devin-ai-integration[bot] in #21086
• Reconcile automations when Postgres notifications are unavailable by @zzstoatzz in #21089
• Surface template rendering failures in automation action status by @devin-ai-integration[bot] in #21045
• Fix env var leakage between concurrent deployments in worker by @devin-ai-integration[bot] in #21047
• Fix auth bypass via endswith() health check path exemption by @bunchesofdonald in #21063
• Validate types in JSON object decoder by @bunchesofdonald in #21073

Integrations & Dependencies 🤝

• Bump packaging upper bound from <25.1 to <26.1 by @purificant in #21015

Development & Tidiness 🧹

• Refactor Runner internals into single-responsibility services by @desertaxle in #20931
• Replace ad-hoc exit code interpreter with centralized registry by @devin-ai-integration[bot] in #21049
• Speed up CI checkout across all workflows by @desertaxle in #21077
• Fix flaky test_two_subscriptions_get_all_events by handling None heartbeats by @devin-ai-integration[bot] in #21037
• Fix flaky test_cache_expiration_expires by using advance_time fixture by @devin-ai-integration[bot] in #21070
• Disable heartbeats in tests to fix CI timeout by @desertaxle in #21062
• Make telemetry metrics module private by @devin-ai-integration[bot] in #21095
• Fix noisy 'I/O operation on closed file' during test teardown by @zzstoatzz in #21096

Documentation 📓

• Add Unify tagging for contract-tier docs pages by @zzstoatzz in #21055

Full Changelog: https://github.com/PrefectHQ/prefect/compare/3.6.21...3.6.22