3.4.24.dev2: Nightly Development Release

What's Changed

Development & Tidiness 🧹

• chore(deps): bump ruff from 0.13.3 to 0.14.0 by @dependabot[bot] in #19137

Uncategorized

• Auto-update documentation by @github-actions[bot] in #19154

Full Changelog: 3.4.24.dev1...3.4.24.dev2

3.4.24.dev1: Nightly Development Release

What's Changed

Bug Fixes 🐞

• Mitigate memory leak in in-memory messaging system by @desertaxle in #19136

Documentation 📓

• Improve Prefect MCP server documentation by @zzstoatzz in #19142

Uncategorized

• chore: update downstream repo reference for image automation by @jamiezieziula in #19139
• Auto-update documentation by @github-actions[bot] in #19140

Full Changelog: 3.4.23...3.4.24.dev1

3.4.23 - Would you like some API in your CLI?

Released on October 09, 2025

Enhancements ➕➕

• feat(client): allow using custom SSL contexts by @fatih-acar in #19106
• Add prefect api command for direct API access by @chrisguidry in #19131

Bug Fixes 🐞

• Add support for day_or parameter in cron schedule configurations by @zzstoatzz in #19121
• Fix interference in async cancellation handling from timeout_async context manager by @desertaxle in #19101
• Fix recursive local module discovery in bundle serialization by @desertaxle in #19124

Development & Tidiness 🧹

• Fix test_flow_run_lateness flake with dynamic tolerance by @chrisguidry in #19132

Documentation 📓

• docs: link to available integrations release notes by @rcash in #19108
• Add ATProto social analytics dashboard example using Prefect Assets by @zzstoatzz in #18984
• Add documentation for Prefect MCP server by @desertaxle in #19115

Full Changelog: 3.4.22...3.4.23

3.4.23.dev3: Nightly Development Release

What's Changed

Development & Tidiness 🧹

• chore(deps): bump github/codeql-action from 3 to 4 by @dependabot[bot] in #19126
• chore(deps): bump astral-sh/setup-uv from 6 to 7 by @dependabot[bot] in #19125
• chore(deps): update whenever requirement from <0.9.0,>=0.7.3 to >=0.7.3,<0.10.0 by @dependabot[bot] in #19034

Uncategorized

• Fix recursive local module discovery in bundle serialization by @desertaxle in #19124

Full Changelog: 3.4.23.dev2...3.4.23.dev3

3.4.23.dev2: Nightly Development Release

What's Changed

Bug Fixes 🐞

• Add support for day_or parameter in cron schedule configurations by @zzstoatzz in #19121

Documentation 📓

• Add documentation for Prefect MCP server by @desertaxle in #19115
• Auto-update documentation by @github-actions[bot] in #19109
• Auto-update documentation by @github-actions[bot] in #19123

Full Changelog: 3.4.23.dev1...3.4.23.dev2

3.4.23.dev1: Nightly Development Release

What's Changed

Documentation 📓

• docs: link to available integrations release notes by @rcash in #19108
• Add ATProto social analytics dashboard example using Prefect Assets by @zzstoatzz in #18984

Uncategorized

• Fix interference in async cancellation handling from timeout_async context manager by @desertaxle in #19101

Full Changelog: 3.4.22...3.4.23.dev1

3.4.22 - If Only Our Releases Had Transaction Rollbacks

What Changed?

Bug Fixes 🐞

• Fix startup errors when installed with pydantic 2.10 and Python 3.9 and 3.10 by @desertaxle in #19095
• Fix async task transaction rollback from sync task by @zzstoatzz in #19097

Documentation 📓

• document serving instance methods by @zzstoatzz in #19075

Full Changelog: 3.4.21...3.4.22

3.4.21 - Memory Lane Has a TTL

Released on October 02, 2025

Enhancements ➕➕

• Add automatic local dependency discovery for flow bundles by @desertaxle in #19043
• Allow serving instance methods by @desertaxle in #19070
• Add task run tags as related resources on task run events by @chrisguidry in #19059
• Enable configurable lease timeout durations by @solms in #19058
• Improve CLI import performance by @zzstoatzz in #19078

Bug Fixes 🐞

• Improve deployment validation error messages by @desertaxle in #19038
• Fix KeyError when running deployment without parameter schema by @zzstoatzz in #19055
• Fix PREFECT_CLIENT_CUSTOM_HEADERS JSON string parsing by @zzstoatzz in #19052
• Use TTLCache for memory-based CausalOrdering to prevent memory leaks by @desertaxle in #19061
• Fix block type dispatch breaking validation of Block Unions by @GalLadislav in #18995
• Update Postgres listener to respect application_name setting by @zzstoatzz in #19081

Development & Tidiness 🧹

• Clean up lineage experiment by @zzstoatzz in #19041
• Remove duplicate graphviz, bump typer, update lockfile by @zzstoatzz in #19051
• Remove flaky serve interrupt integration test by @zzstoatzz in #19053
• Rename server.concurrency.initial_lease_timeout to server.concurrency.initial_deployment_lease_duration by @desertaxle in #19085
• Normalize empty parameter_openapi_schema to valid OpenAPI format by @zzstoatzz in #19072
• Keep DeploymentCreate.parameter_openapi_schema field Optional by @zzstoatzz in #19089

Documentation 📓

• Improve automation actions documentation with type identifiers by @zzstoatzz in #19071

Full Changelog: 3.4.20...3.4.21

3.4.21.dev5: Nightly Development Release

What's Changed

Enhancements ➕➕

• Allow serving instance methods by @desertaxle in #19070

Bug Fixes 🐞

• Fix block type dispatch breaking validation of Block Unions by @GalLadislav in #18995

Documentation 📓

• improve automation actions documentation with type identifiers by @zzstoatzz in #19071

Uncategorized

• Auto-update documentation by @github-actions[bot] in #19073
• Auto-update documentation by @github-actions[bot] in #19074
• improve CLI import performance (part 1) by @zzstoatzz in #19078
• Auto-update documentation by @github-actions[bot] in #19079

Full Changelog: 3.4.21.dev4...3.4.21.dev5

3.4.21.dev4: Nightly Development Release

What's Changed

Enhancements ➕➕

• Add automatic local dependency discovery for flow bundles by @desertaxle in #19043

Bug Fixes 🐞

• fix keyerror when running deployment without parameter schema by @zzstoatzz in #19055
• Fix PREFECT_CLIENT_CUSTOM_HEADERS JSON string parsing by @zzstoatzz in #19052
• Use TTLCache for memory-based CausalOrdering to prevent memory leaks by @desertaxle in #19061

Integrations & Dependencies 🤝

• remove log level set in kubernetes observer by @zzstoatzz in #19060

Uncategorized

• Auto-update documentation by @github-actions[bot] in #19062
• Add task run tags as related resources on task run events by @chrisguidry in #19059
• Auto-update documentation by @github-actions[bot] in #19063
• Auto-update documentation by @github-actions[bot] in #19066
• Enable configurable lease timeout durations by @solms in #19058
• Auto-update documentation by @github-actions[bot] in #19067

Full Changelog: 3.4.21.dev3...3.4.21.dev4