3.8

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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

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