Changelog

New Features:

• Checkpointing: Added tool batch level checkpointing and unified /continue for regenerate and forking a run. Also added support for forking sessions. See cookbooks.
• Add a new toolkit StudioTool for dynamic agent, team , workflow composition.

Improvements:

• Gemini: GeminiInteractions is now lazily imported, so Gemini no longer requires google-genai 2.0.
• PII Guardrail: custom_patterns now accepts raw regex strings.
• Vector DBs: ClickHouse and Pinecone now report their supported search types via get_supported_search_types()

Bug Fixes:

• FileTools: Return forward-slash paths from FileTools and related file tools on all platforms.
• Team Cancellation: Async team delegation now uses the async cancellation check.
• AccuracyEval: Fixed empty results to return None scores.
• Gemini: Guidance retries now respect retry_with_guidance_limit after a retryable error.
• Serialization: Non-ASCII text is now preserved instead of being escaped.
• Files: Text files now reload correctly from session history.
• Teams: Nested team post-hook events no longer leak into response content.
• Run Events: Streaming content events no longer drop the image field.
• OpenAILike: Avoid Chat suffix for OpenAILike providers.
• SentenceTransformerReranker: Allow supplied cross encoder.
• HackerNews: Read user ID from the correct API field.

What's Changed

• fix(hackernews): read user id from the correct API field by @devYRPauli in #8422
• [fix] Allow supplied SentenceTransformerReranker cross encoder by @YankhangSIT in #8415
• fix: avoid Chat suffix for OpenAILike providers by @mattholy in #8428
• fix: validation by @kausmeows in #8493
• fix: support google-genai 2.9.0 in GeminiInteractions by @ysolanky in #8488
• feat: introduce StudioTool for dynamic agent, team , workflow composition by @Ayush0054 in #7575
• [chore] Fix typos: guardails → guardrails in agent and team _run.py by @yaosongding in #8504
• [fix] emit POSIX paths from FileTools search and listing methods by @Shiv1909 in #7526
• fix: await async cancellation check in async delegate paths by @kepler in #8489
• [fix] make GeminiInteractions import lazy to avoid forcing google-genai>=2.0.0 by @raywcm in #8429
• [fix] AccuracyResult stat fields default to None to prevent AttributeError by @octo-patch in #7674
• [fix] prevent unicode escaping in knowledge serialization using ensure_ascii=False by @harsh21234i in #7041
• fix: guidance-retry limit bypassed when plain retry precedes RetryableModelProviderError by @devteamaegis in #8094
• fix: auto-compile raw regex strings in PIIDetectionGuardrail.custom_patterns by @VANDRANKI in #7775
• fix: Validate base64 and preserve text file content by @VirusDumb in #8459
• fix: add PostHookStartedEvent and PostHookCompletedEvent to TeamRunOutputEvent Union (#8351) by @raywcm in #8358
• fix: report supported search types for clickhouse and pineconedb by @SalimELMARDI in #6907
• fix: serialize the singular image field in BaseRunOutputEvent.to_dict() by @ly-wang19 in #8524
• feat: run checkpointing + unified /continue by @ashpreetbedi in #8092
• chore: Release v2.6.19 by @kausmeows in #8531

New Contributors

• @devYRPauli made their first contribution in #8422
• @YankhangSIT made their first contribution in #8415
• @yaosongding made their first contribution in #8504
• @raywcm made their first contribution in #8429
• @ly-wang19 made their first contribution in #8524

Full Changelog: v2.6.18...v2.6.19