Added:
- New release **langchain-model-profiles==0.0.6** — includes many dependency bumps, new features such as content-block-centric streaming (v2), a new `langchain-openrouter` provider package, additional model profile fields, and various fixes and CI improvements.
- New release **langchain-core==1.4.6** — adds package version tracking to tracing metadata, normalizes v1 streamed tool calls, and unifies mypy config across the monorepo.
- New release **langchain-core==1.4.5** — adds validation of tool call chunks during streaming, fixes async tracer fallback in sync contexts, and tightens structured output model fallbacks.

Changed:
- The Pull requests count on the repository changed from 127 to 110.
- The “Latest” label moved from `langchain-core==1.4.4` to `langchain-core==1.4.6`.

Removed:
- Release **langchain==1.3.5** — its changelog included AND-capable trigger conditions, support for `apply_patch` built-in tool, and dependency bumps.
- Release **langchain-perplexity==1.4.0** — its changelog included `bind_tools` and Responses-API tool round‑trip improvements.
- Release **langchain-openai==1.3.0** — its changelog included support for `apply_patch` built-in tool and model profile data refreshes.