Prefect Files

3.8.7 - There's no place like local

Released on September 25, 2026

New Features 🎉

• Add browser-local pinned deployments to the React UI by @zzstoatzz in #23143

Enhancements ➕➕

• Format deployment Created/Updated timestamps in ui-v2 metadata by @devin-ai-integration[bot] in #23112
• Show tag names inline and make tag overflow focusable in ui-v2 by @devin-ai-integration[bot] in #23116
• Set browser tab titles on entity and index pages in ui-v2 by @devin-ai-integration[bot] in #23179
• Add container_wait_timeout to DockerWorkerJobConfiguration by @devin-ai-integration[bot] in #23151
• Add flow_run(state_type, coalesce(start_time, expected_start_time)) index by @devin-ai-integration[bot] in #23128
• Log the real size when refusing to publish an oversized event by @David-Wu1119 in #23180

Bug Fixes 🐞

• Improve dark-mode readability of flow run cards in ui-v2 by @devin-ai-integration[bot] in #23114
• Fix V2 run-list wrapping and toolbar overflow at constrained widths by @devin-ai-integration[bot] in #23115
• Restore deployment, work pool, and work queue links on V2 flow-run cards by @devin-ai-integration[bot] in #23113
• Render data:image/* URIs in ui-v2 markdown by @devin-ai-integration[bot] in #23156
• Prevent revocation of live filesystem concurrency leases by @devin-ai-integration[bot] in #22936
• Accept None values in find_placeholders by @devin-ai-integration[bot] in #23158
• Deliver include_files sidecar for direct Docker submissions by @devin-ai-integration[bot] in #22858
• Persist failed task exceptions according to persist_result in both task engines by @devin-ai-integration[bot] in #23160
• Make Azure bundle uploads idempotent for reused sidecar keys by @devin-ai-integration[bot] in #23170
• Fix retry budget for completed subflows on parent retry by @zzstoatzz in #23153
• Fix reading results persisted to an unsaved local filesystem outside the default storage path by @devin-ai-integration[bot] in #23188
• Allow clearing deployment job_variables with an empty dict by @devin-ai-integration[bot] in #23203
• Omit inferred securityGroups so ECS tasks use the VPC default security group by @devin-ai-integration[bot] in #23132
• Fix race between WatcherThreadCancelScope timeout injection and scope exit by @devin-ai-integration[bot] in #23089
• Return 0.0 from clamped_poisson_interval for non-positive intervals by @devin-ai-integration[bot] in #23208
• Fix date clearing on cancel by @uinstinct in #23148
• Fix falsy variables rendered as blank by @uinstinct in #23096
• Fix next date selection selecting previous date by @uinstinct in #23081
• Fix typo in search deployment placeholder by @uinstinct in #23176
• Fix interval form showing incorrect value and time unit by @uinstinct in #23209

Integrations & Dependencies 🤝

• Bump soupsieve from 2.8.4 to 2.9 by @dependabot[bot] in #23147

Development & Tidiness 🧹

• Omit UI source maps and nightly source distributions by @desertaxle in #23120
• Fix flaky interval schedule anchor time test when the clock reads 14:35 by @devin-ai-integration[bot] in #23178
• Fix date-dependent failure in interval schedule form test by @devin-ai-integration[bot] in #23125
• Fix flaky test_multiple_workers_receive_distinct_messages by @devin-ai-integration[bot] in #23149
• Fix two tests that do not check what their names say by @devin-ai-integration[bot] in #23142
• Make no-op comparisons in tests actually assert by @David-Wu1119 in #23141
• Run Biome from node_modules in UI v2 lint job by @devin-ai-integration[bot] in #23168

Documentation 📓

• Add Osano consent manager to Prefect docs by @desertaxle in #23133
• State when a deployment concurrency slot is acquired and released by @devin-ai-integration[bot] in #23085
• Update docs footer to use the X logo and add Bluesky by @zzstoatzz in #23210
• Remove duplicate 'the' in Modal deployment guide by @mrchatam in #23091
• Link agent setup guides from README by @zzstoatzz in #23145

Full Changelog: https://github.com/PrefectHQ/prefect/compare/3.8.6...3.8.7