3.8 - Prefect — ContextQMD

3.8.1 - To relinquish, perchance to retry

Released on July 30, 2026

Enhancements ➕➕

Show tooltips for flow run state tabs in the V2 UI by @uinstinct in #22617

Bug Fixes 🐞

Make ConcurrencyContext exit cleanup best-effort by @devin-ai-integration[bot] in #22619
Keep worker startup alive when the Prefect API is unreachable by @devin-ai-integration[bot] in #22640
Make PrefectFutureList.result timeout message reachable by @devin-ai-integration[bot] in #22634
Render ANSI color escape codes in flow run logs in the V2 UI by @devin-ai-integration[bot] in #22653
Confirm the exact suspension transition reported by a suspension event by @devin-ai-integration[bot] in #22649
Allow any float precision on schema number inputs in the V2 UI by @AJ-ing in #22643
Reject unknown fields for FlowRunFilter and its nested criteria by @devin-ai-integration[bot] in #22659
Relinquish evicted flow runs to infrastructure retry by @chuqCTC in #22622
Fix saved block parameters in deployments by @desertaxle in #22568
Preserve subprocesses after output stream errors by @desertaxle in #22573
Clear stale expiration entries when a repossessed lease is missing by @devin-ai-integration[bot] in #22657

Development & Tidiness 🧹

Fix codespell error on unit test TEST_BLOCK_CODE_BAD_SYNTAX on Windows by @g-ringeisen in #22642
Drop unused global mintlify-scrape install from static analysis by @devin-ai-integration[bot] in #22677

Documentation 📓

Add missing line break after imports in documentation examples by @uinstinct in #22627
Document Submitting and InfrastructurePending states by @devin-ai-integration[bot] in #22660
Fix flows documentation link to the getting started page by @uinstinct in #22648

Full Changelog: https://github.com/PrefectHQ/prefect/compare/3.8.0...3.8.1

3.8.0 - You had me at first paint

Released on July 23, 2026

Enhancements ➕➕

Add deployment filters to flow run triggers by @samiat4911 in #22319
Make the V2 UI the default for self-hosted servers by @devin-ai-integration[bot] in #22519
Copy additional options when using "Copy to new run" in the V2 UI by @devin-ai-integration[bot] in #22567
Add "Copy to new run" to the flow run menu in the V2 UI by @devin-ai-integration[bot] in #22565
Make URLs in run logs clickable in the V2 UI by @devin-ai-integration[bot] in #22496
Allow year/month selection and manual typing in date inputs in the V2 UI by @devin-ai-integration[bot] in #22495
Add composable worker initializer to ProcessPoolTaskRunner by @devin-ai-integration[bot] in #22591
Canonicalize legacy setting names across settings handling and documentation generators by @devin-ai-integration[bot] in #22503

Bug Fixes 🐞

Harden RemoteFileSystem path resolution containment and rebuild absolute URLs by @devin-ai-integration[bot] in #22476
Handle module-path entrypoints when generating default pull step by @devin-ai-integration[bot] in #22493
Preserve empty pull: [] in prefect deploy instead of forcing set_working_directory by @devin-ai-integration[bot] in #22490
Prevent duplicate server-minted flow-run state timestamps by @devin-ai-integration[bot] in #22512
Keep flow run watch alive across stream disconnects by @devin-ai-integration[bot] in #22550
Fix db_vacuum retention-override full scan of event_resources by @devin-ai-integration[bot] in #22536
Record lease at acquisition so a cancelled acquire can't leak a slot by @devin-ai-integration[bot] in #22542
Fix deployment search empty state blocking typing in the V2 UI by @devin-ai-integration[bot] in #22497
Guard deployment Parameters tab against missing schema properties by @devin-ai-integration[bot] in #22604
Give TaskRunFilterState.type and TaskRunFilterState.name a default of None by @chuenchen309 in #22526
Preserve stdlib precedence in flow runs by @AkhilTrivediX in #22529
Make zero-limit behavior consistent for core pagination endpoints by @devin-ai-integration[bot] in #22566
Redact API key from lazy logging args in ObfuscateApiKeyFilter by @devin-ai-integration[bot] in #22552
Guard non-thread-safe TTLCache in _read_toml_file with a lock by @devin-ai-integration[bot] in #22571
Fix as_completed timeout enforcement in worker threads and on Windows by @devin-ai-integration[bot] in #22607
Enforce READ COMMITTED isolation for PostgreSQL server transactions by @devin-ai-integration[bot] in #22531

Integrations & Dependencies 🤝

Add IfPossible Docker image pull policy option by @MrJack91 in #22154

Development & Tidiness 🧹

Quote argument-hint YAML values so Copilot CLI ≥1.0.65 loads all skills by @thejesh23 in #22484
Prevent recurring UI dependency PR failures by @devin-ai-integration[bot] in #22541
Cover truncated_to in utilities.text by @eeshsaxena in #22532
Stabilize flaky cleanup renewal and flow-discovery log tests by @devin-ai-integration[bot] in #22572

Documentation 📓

Clarify /api/health vs /api/ready for Kubernetes probes by @br413 in #22500
Document PrivateLink tenant authentication (vpce-id binding) by @jimid27 in #22498
Update variables concept docs to reflect JSON values and dash support by @devin-ai-integration[bot] in #22501
Fix title in run background tasks documentation by @uinstinct in #22561
Make minor fixes in Docker workflow documentation by @uinstinct in #22585
Update migration timeout guidance to reference PREFECT_SERVER_DATABASE_MIGRATION_TIMEOUT by @github-actions[bot] in #22610
Document initializer/initargs support in ProcessPoolTaskRunner by @github-actions[bot] in #22595
Document new IfPossible Docker image pull policy option by @github-actions[bot] in #22515

Full Changelog: https://github.com/PrefectHQ/prefect/compare/3.7.8...3.8.0