PrefectHQ/prefect 3.6.30.dev4

3.6.30.dev4: Nightly Development Release

on GitHub

What's Changed

Bug Fixes 🐞

• Retry record_bulk_task_run_events on IntegrityError by @devin-ai-integration[bot] in #21813
• Set custom flow run names before Running events by @devin-ai-integration[bot] in #21803
• Warn when nested ThreadPoolTaskRunner submission would deadlock by @devin-ai-integration[bot] in #21800

Development & Tidiness 🧹

• fix(ci): add apt retry config to old-sqlite.Dockerfile by @devin-ai-integration[bot] in #21814
• fix(tests): use thread-based pytest-timeout for test_timeout_stops_execution_at_next_task_for_sync_flows by @devin-ai-integration[bot] in #21819

Documentation 📓

• Add new flow.visualize output format for Mermaid by @znicholasbrown in #21786

Uncategorized

• Fix V2 concurrency lease release errors by @devin-ai-integration[bot] in #21797
• docs: document IntegrityError retry-and-raise contract for record_bulk_task_run_events by @github-actions[bot] in #21815
• docs: clarify that custom flow_run_name is set before Running state by @github-actions[bot] in #21817
• docs: document state-transition metadata ordering invariant in flow engine by @github-actions[bot] in #21818
• Add flow engine module entrypoint by @desertaxle in #21799
• Run prepared pyproject workspaces with uv by @desertaxle in #21801
• docs: document flow_engine.py subprocess module entrypoint in SDK AGENTS.md by @github-actions[bot] in #21820
• docs: document auto-uv command selection in WorkspaceResolvingEngineCommandStarter by @github-actions[bot] in #21821
• docs: document ThreadPoolTaskRunner pickling and nested-submit deadlock pitfalls by @github-actions[bot] in #21822
• docs: document ThreadPoolTaskRunner nested-submit deadlock risk and mitigations by @github-actions[bot] in #21823
• docs: update visualization.py description to include Mermaid backend by @github-actions[bot] in #21824
• Route server default result storage through runtime resolution by @zzstoatzz in #21759

Full Changelog: 3.6.30.dev3...3.6.30.dev4