This release adds 2 notable features for engineering teams evaluating rollout.
✓ No known CVEs patched in this version
Topics
Summary
AI summaryUpdates 🐛 Bug Fixes, fix, and 🚀 Features across a mixed release.
Changes in this release
| Type | Severity | Summary | CVE |
|---|---|---|---|
| Feature | Medium |
Allow `to_cli()` to pass `model` for unset-model agents. Allow `to_cli()` to pass `model` for unset-model agents. Source: llm_adapter@2026-07-16 Confidence: high |
— |
| Feature | Medium |
Bump bundled chat UI to `2.0.0` and target `sdk_version=7` in `Agent.to_web()`. Bump bundled chat UI to `2.0.0` and target `sdk_version=7` in `Agent.to_web()`. Source: llm_adapter@2026-07-16 Confidence: high |
— |
| Bugfix | Medium |
Validate Tool `max_retries` and `timeout` parameters. Validate Tool `max_retries` and `timeout` parameters. Source: llm_adapter@2026-07-16 Confidence: high |
— |
| Bugfix | Medium |
Validate ToolOutput `max_retries`. Validate ToolOutput `max_retries`. Source: llm_adapter@2026-07-16 Confidence: high |
— |
| Bugfix | Medium |
Validate Agent `tool_timeout`. Validate Agent `tool_timeout`. Source: llm_adapter@2026-07-16 Confidence: high |
— |
| Bugfix | Medium |
Validate `max_queued` in ConcurrencyLimit and ConcurrencyLimiter. Validate `max_queued` in ConcurrencyLimit and ConcurrencyLimiter. Source: llm_adapter@2026-07-16 Confidence: high |
— |
| Bugfix | Medium |
Fix `JsonSchemaTransformer` to recurse into `allOf` composition. Fix `JsonSchemaTransformer` to recurse into `allOf` composition. Source: llm_adapter@2026-07-16 Confidence: high |
— |
| Bugfix | Medium |
Fix empty and thinking-only responses reusing earlier text as the run output. Fix empty and thinking-only responses reusing earlier text as the run output. Source: llm_adapter@2026-07-16 Confidence: high |
— |
Full changelog
What's Changed
🚀 Features
- Allow
to_cli()to passmodelfor unset-model agents by @hramezani in https://github.com/pydantic/pydantic-ai/pull/6384 - Bump bundled chat UI to
2.0.0and targetsdk_version=7inAgent.to_web()by @dsfaccini in https://github.com/pydantic/pydantic-ai/pull/6296
🐛 Bug Fixes
- fix: validate Tool max_retries and timeout parameters by @isheng-eqi in https://github.com/pydantic/pydantic-ai/pull/6375
- fix: validate ToolOutput max_retries by @isheng-eqi in https://github.com/pydantic/pydantic-ai/pull/6377
- fix: validate Agent tool_timeout by @isheng-eqi in https://github.com/pydantic/pydantic-ai/pull/6383
- fix: validate max_queued in ConcurrencyLimit and ConcurrencyLimiter by @isheng-eqi in https://github.com/pydantic/pydantic-ai/pull/6373
- Fix
JsonSchemaTransformerto recurse intoallOfcomposition by @pydanty[bot] in https://github.com/pydantic/pydantic-ai/pull/6394 - Fix empty and thinking-only responses reusing earlier text as the run output by @DouweM in https://github.com/pydantic/pydantic-ai/pull/6403
New Contributors
- @isheng-eqi made their first contribution in https://github.com/pydantic/pydantic-ai/pull/6375
Full Changelog: https://github.com/pydantic/pydantic-ai/compare/v2.7.0...v2.8.0
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Earlier breaking changes
- v1.95.0 rename ‘built-in tools’ to ‘native tools’, deprecate old fields, register via capabilities=[NativeTool(...)]
Beta — feedback welcome: [email protected]