What's Changed fix(mcp): merge custom env with os.environ for MCPServerStdio (#1296) When users set env={"FOO": "bar"} on an MCPServerStdio, the subprocess was spawned with only those vars — missing PATH, HOME, etc., causing a TimeoutError during MCP server initialization. Now always merges user-specified env on top of os.environ.
What's New OpenAI Observability Integration (Beta) Added marvin.beta.observability.openai module that enables tracing Marvin agent calls to OpenAI's observability dashboard. When running inside Prefect flows/tasks, it automatically captures runtime context (flow_run_id, task_run_id, deployment info) and sends it as request metadata. Usage: from prefect import flow, task import marvin from marvin.b…
MCP Server Lifecycle Fix This patch release fixes a critical issue where MCP servers were being restarted for each agent.run() call instead of staying alive for the session. What was happening When using MCP servers with agents, each agent.run() call would: Start the MCP server subprocess Run the agent Stop the MCP server subprocess This caused unnecessary overhead and defeated the purpose of havi…
What's Changed Docs 📚 fix: remove stale delegates parameter from Agent documentation by @zzstoatzz in #1241 docs: replace all uv pip commands with uv add by @zzstoatzz in #1242 fix: dispose engine after import-time table creation by @zzstoatzz in #1256 Other Changes 🦾 Add AIML API provider-specific example scripts by @D1m7asis in #1243 run ruff by @zzstoatzz in #1245 feat: integrate Claude Agent S…
What's Changed Other Changes 🦾 use claude haiku 4.5 for research agent by @zzstoatzz in #1234 fix github label validation and error handling by @zzstoatzz in #1235 update atproto SDK to v0.0.63 and fix timeseries example by @zzstoatzz in #1236 delete cursor rules by @zzstoatzz in #1238 fix: handle PartEndEvent from pydantic-ai 1.9.0+ by @zzstoatzz in #1240 Full Changelog: v3.2.2...v3.2.3
What's Changed Other Changes 🦾 fix: allow None results for Optional task types by @zzstoatzz in #1232 Full Changelog: v3.2.1...v3.2.2
What's Changed fix feat: enable true concurrent execution for independent tasks by @zzstoatzz in #1229 Other Changes 🦾 Slackbot: ignore edits while initial response is in progress by @zzstoatzz in #1224 Slackbot: dedupe only the root message; process replies normally by @zzstoatzz in #1225 Slackbot: per-message dedupe; ignore only edits while in-progress by @zzstoatzz in #1226 Full Changelog: v3.2…
This release deprecates Team and all its subclasses because they don't work as well as something in the public API should What's Changed Docs 📚 Deprecate Teams feature due to fundamental issues by @zzstoatzz in #1221 Modernize codebase for Python 3.10+ by @zzstoatzz in #1223 Full Changelog: v3.1.6...v3.2.0
What's Changed New Features 🎉 fixes Fix Team.get_agentlet() signature for MCP server compatibility by @zzstoatzz in #1219 docs simplify readme by @zzstoatzz in #1215 New Contributors @bdalpe made their first contribution in #1214 Full Changelog: v3.1.5...v3.1.6
What's Changed Other Changes 🦾 Update Slackbot documentation to reflect current implementation by @zzstoatzz in #1204 Fix pydantic-ai deprecation warning: mcp_servers -> toolsets by @zzstoatzz in #1206 Fix IndexError in streaming when ToolCallPartDelta is present by @zzstoatzz in #1208 Full Changelog: v3.1.4...v3.1.5