v0.30.0 (2026-09-08)

What's Changed

• Re-export MCPToolsetClient from pydantic_ai_harness.stackone._toolset so CI lint passes again by @mpfaffenberger in #725
• Frame the media docs as Step Persistence plumbing, not a capability by @mpfaffenberger in #751
• Name the internal Agent in SummarizingCompaction, ToolOutputLimits, SystemReminders, Advisor and PydanticAIChatModel so Logfire attributes their runs by @mpfaffenberger in #774
• Shield the cancel+gather teardown in guardrails parallel mode and MontyExecutor by @mpfaffenberger in #758
• Add TrajectoryJudge: review the live run with a second model on a cadence and steer it mid-run by @mpfaffenberger in #724
• Register TrajectoryJudge in the capability combination policy by @adtyavrdhn in #817
• Deprecate on_spend, on_usage, on_fire, and PlanEventEmitter toward capability event subscriptions by @DouweM in #714
• Emit FileSystem traversal events and subscribe RepoContext with @on_event, deprecating traversal_tool_names sniffing by @DouweM in #712
• Require every capability to decide what OpenTelemetry it emits by @dsfaccini in #604
• Require youdotcom>=3.1.2 and pass attribution kwargs to You() so outbound requests carry an X-Client-Info header by @tyler5673 in #786
• Run your own Pydantic AI agent in GitHub Agentic Workflows: the pydantic-ai gh-aw engine definition is now hosted here, and PAI_AGENT points a workflow at an agent your repository defines by @dsfaccini in #708
• Count truncation markers within Truncate.max_chars by @Quiyyy in #816

New Contributors

• @tyler5673 made their first contribution in #786
• @Quiyyy made their first contribution in #816

Full Changelog: v0.29.1...v0.30.0