Prefect Files

🎵 And stops my mind from wandering 🎵

Enhancements ➕➕

• Refactor whenever API compat helpers and fix in_local_tz for naive datetimes by @vyagubov in #21640
• Handle unknown serializers during dispatch by @harsh21234i in #21644

Bug Fixes 🐞

• Skip uv pip freeze in bundle creation when a non-uv launcher is set by @devin-ai-integration[bot] in #21607
• Fix DNS rebinding TOCTOU bypass in validate_restricted_url by @devin-ai-integration[bot] in #21591
• Don't overwrite custom_headers Authorization with PREFECT_API_KEY in check_server_version by @vyagubov in #21621
• Fix pydantic-settings source kwargs passing by name by @devin-ai-integration[bot] in #21665
• Fix PrefectConcurrentFuture completion tracking when done callbacks raise by @desertaxle in #21686
• Stop leaking sys.modules entries in load_script_as_module by @zzstoatzz in #21692
• Fix _UnpicklingFuture.add_done_callback swallowing deserialization errors by @saschwartz in #21612
• Fix bundle execute path duplicate pending proposal by @desertaxle in #21646
• Pin current Prefect version in bundle-step uv run commands by @devin-ai-integration[bot] in #21651

Development & Tidiness 🧹

• Prevent aiosqlite teardown race in legacy events/out test by @devin-ai-integration[bot] in #21619
• Remove cancellation race in watch_flow_run timeout test by @devin-ai-integration[bot] in #21648
• Wait for on_cancellation hook markers in nested cancellation tests by @devin-ai-integration[bot] in #21660
• Await asyncio.sleep in test_delete_flow_run_deletes_logs by @devin-ai-integration[bot] in #21657
• Raise asyncpg connection_timeout in unit test mode by @devin-ai-integration[bot] in #21614
• Document SIGTERM bridge and sanitize_subprocess_env in utilities AGENTS.md by @github-actions[bot] in #21604
• Document JSDOM CSS custom property and matchMedia mocking patterns by @github-actions[bot] in #21605
• Clarify that uv pip freeze is skipped only for execution launcher overrides by @github-actions[bot] in #21613
• Document uv run --project for local integrations by @zzstoatzz in #21625
• Document useQuery exception for silently-hiding components in ui-v2 AGENTS.md by @github-actions[bot] in #21642
• Document loaderDeps pattern for UI-only search params in routes AGENTS.md by @github-actions[bot] in #21645
• Document bundle execute path as second propose_submitting=False caller by @github-actions[bot] in #21647
• Document UnknownSerializer tolerance contract in SDK AGENTS.md by @github-actions[bot] in #21649
• Document whenever compat helpers invariant in core SDK AGENTS.md by @github-actions[bot] in #21655
• Add AGENTS.md for integration-tests with polling and setup patterns by @github-actions[bot] in #21662
• Document breadcrumb-scoping pattern for strict mode on detail pages by @github-actions[bot] in #21694

Documentation 📓

• Document running multiple background services for HA by @devin-ai-integration[bot] in #21669
• Fix broken internal links by @mgalore in #21688

Full Changelog: https://github.com/PrefectHQ/prefect/compare/3.6.27...3.6.28