Data and AI releases

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prefect 3.6.15 - Simply Authful

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Bug Fixes 🐞 Fix PrefectCloudEventsClient auth handshake breaking Cloud connections Cap concurrency limit retry-after to prevent excessive delays from burst traffic

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Also shipped Jan 30, 2026Prefect in January 2026 β†’

What's new in Sigma

AI Documentation MCP server available (Beta) If you use AI tools to work with Sigma and want to enrich agent behavior or questions with context about officially supported Sigma functionality, the Sigma documentation can now be accessed using the model context protocol (MCP) server at https://help.sigmacomputing.com/mcp .

API Key Management GA Release

API Key Management is now GA to all customers, regardless of plan. As before, only users with Manager or Admin roles will have access to these pages. A newly added Rotate function allows customers to self-serve legacy API key rotation. Secret Key support remains in closed beta, and its GA release will be announced at a future date.

Modal 1.3.2

- Modal objects now have a .get_dashboard_url() method. This method will return a URL for viewing that object on the Modal dashboard: python fc = f.spawn() print(fc.get_dashboard_url()) # Easy access to logs, etc.

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3.6.14 - A Prefect Server for Every ::1

Enhancements βž•βž• - Support parsing TOML 1.0 on Python 3.11+ - Make runner cancellation observing critical to runner health - Reload root settings after running plugins to enable environment variable updates to take effect - Support IPv6 addresses in prefect server start - Add authentication to /api/events/in WebSocket endpoint Bug Fixes 🐞 - Add polling...

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Prefect 3.6.16 - It's Bulking Season

New Features πŸŽ‰ Add prefect cloud asset list and delete commands Add bulk operation endpoints for flow runs, deployments, and flows Add SDK instrumentation module Enhancements βž•βž• Allow infra name templating with flow and flow_run Add max_scheduled_runs, parameters, and slug fields to deployment schedule methods Bug Fixes 🐞 Fix visit_collection to handle...

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Prefect 3.6.13 - The heartbeat is coming from *inside* the engine

Enhancements βž•βž• - Add FlowRunFilterCreatedBy - Add retry logic for PrefectEventsClient.__aenter__() initial connection Bug Fixes 🐞 - Move flow run heartbeat event emission to flow run engine - Fix websocket cleanup AttributeError in event clients - Add warning when sync task with timeout runs in worker thread - Prevent GitHub token leakage in git error...

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Prefect 3.6.12 - It's not a feature, it's a bug!

What's Included Enhancements βž•βž• Add httpx.ConnectError to client retry exceptions Bug Fixes 🐞 Add build=False documentation to flow.deploy guide fix: display error details nicely in work-pool create command fix: remove CANCELLED from EnforceCancellingToCancelledTransition to allow retrying cancelled flows Add retry logic to...

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Prefect 3.6.17 - Goodbye, Ghost in the WebSocket

New Features πŸŽ‰ Add prefect server status command Enhancements βž•βž• Make PrefectFutureList.result() fail-fast using as_completed Improve CLI connection message for self-hosted server Add replaces field for renaming schedule slugs Add attribution headers to SDK API requests Bug Fixes 🐞 Fix flow timeout not retrying when retries are enabled Fix the flow run...

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Prefect 3.6.11 - It's my generation, baby

Released on January 15, 2026 This release introduces prefect sdk generate a new CLI command that generates fully-typed, custom Python SDKs from the deployments in your workspace or self-hosted server, making it easy to trigger your deployments from other workflows with confidence. To see how it works, check out the Prefect docs.

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Prefect 3.6.18 - The annotation that minds its own business

Enhancements βž•βž• Add opaque annotation to prevent recursive traversal of resolved task inputs Add PREFECT_WORKER_DEBUG_MODE for worker-only debug logging Support DateTimeDelta as interval option in IntervalSchedule Bug Fixes 🐞 Include duration fields in TaskRunResponse Skip lease renewal and release when no concurrency limits exist Fix order-dependent slug...

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Prefect 3.6.10 - Five Bugs Walked Into A Bar And None Of Them Left

3.6.10 - Five Bugs Walked Into A Bar And None Of Them Left Released on January 08, 2026 Enhancements βž•βž• Add prefect automation update CLI command Add upserting global concurrency limit decay Bug Fixes 🐞 Fix AttributeError in Consumer.cleanup() for non-memory brokers Fix exception_to_crashed_state_sync failing without async backend Fix MockValSer...

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