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Changelog

All notable changes to Pipecat Subagents will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

[0.4.0] - 2026-04-20

Changed

⚠️ Removed the parallel parameter from the @task decorator. All task handlers now always run in their own asyncio task so the bus message loop is never blocked. Remove parallel=True or parallel=False from existing @task decorators. (PR #16)

[0.3.0] - 2026-04-16

Added

Added a ready property to BaseAgent that indicates whether the agent's pipeline has started and is ready to operate. (PR #13)

Changed

⚠️ BusSubscriber now requires a name: str attribute. All built-in subscribers already inherit this from BaseObject; custom implementations that extend BusSubscriber directly must provide one. (PR #12)

Fixed

Fixed an IndexError: pop index out of range in AgentBus.unsubscribe caused by concurrent unsubscriptions. Subscriptions are now stored in a dict keyed by subscriber name instead of a list. (PR #12)

Other

Modernized type annotations across all source files for Python 3.11+: Optional[X] replaced with X | None, Callable/Coroutine imported from collections.abc, and isinstance checks use tuple form instead of union operator. (PR #14)

[0.2.1] - 2026-04-15

Changed

⚠️ The flows extra now requires pipecat-ai-flows>=1.0.0 (previously >=0.0.22). (PR #8)

Fixed

Fixed an IndexError: pop index out of range raised from AgentBus.unsubscribe when subscribers unsubscribed concurrently. Subscription mutations are now serialized with an internal lock. (PR #9)

[0.2.0] - 2026-04-15

Added

Added a public activation_args property to BaseAgent for inspecting the arguments from the most recent activation. The value is cleared when the agent is deactivated. (PR #6)

[0.1.0] - 2026-04-14

Initial public release.