LangChain for Java Files

Notable Changes

• Agentic: generate a HTML report of an agentic system topology and execution by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4600
• Agentic: allow to integrate an MCP tool as a non-AI agent by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4630
• Hibernate EmbeddingStore integration by @beikov in https://github.com/langchain4j/langchain4j/pull/4622
• Observability: Metrics with Micrometer by @Sus4nne in https://github.com/langchain4j/langchain4j/pull/4556
• Observability: Observation API + Micrometer module by @brunobat in https://github.com/langchain4j/langchain4j/pull/4597
• Observability: add ModerationModel listener support by @jeanbisutti in https://github.com/langchain4j/langchain4j/pull/4588
• Agent Skills support by @dliubarskyi in https://github.com/langchain4j/langchain4j/pull/4646
• Tool Search by @dliubarskyi in https://github.com/langchain4j/langchain4j/pull/4570
• Bedrock: add structured output support by @mohankumar27 in https://github.com/langchain4j/langchain4j/pull/4552
• Bedrock: support service tiers; support another strategy for caching points by @jonathannaguin in https://github.com/langchain4j/langchain4j/pull/4563

Other Changes

• docu: update versions to 1.11.0 and 1.11.0-beta19 by @dliubarskyi in https://github.com/langchain4j/langchain4j/pull/4536
• Update versions to 1.12.0-SNAPSHOT and 1.12.0-beta20-SNAPSHOT by @dliubarskyi in https://github.com/langchain4j/langchain4j/pull/4537
• Documenting the UserMessage caching feature added in PR [#4487]. by @hetvi3012 in https://github.com/langchain4j/langchain4j/pull/4533
• Clarify PGVector hybrid search configs and RRF scoring by @YongGoose in https://github.com/langchain4j/langchain4j/pull/4539
• Bugfix/toolid repeat: add docs by @chq562656437 in https://github.com/langchain4j/langchain4j/pull/4544
• Bump com.azure:azure-sdk-bom from 1.3.3 to 1.3.4 by @jdubois in https://github.com/langchain4j/langchain4j/pull/4541
• chore(deps): update dependency @mdx-js/react to v3.1.1 by @renovate[bot] in https://github.com/langchain4j/langchain4j/pull/4545
• Bump openai-java version to 4.17.0 by @jdubois in https://github.com/langchain4j/langchain4j/pull/4546
• Gemini grounding metadata not properly propagated by @glaforge in https://github.com/langchain4j/langchain4j/pull/4555
• Fix the Azurite version check by @jdubois in https://github.com/langchain4j/langchain4j/pull/4549
• Make MCP stdio transport's operations fail immediately when the subprocess exits by @jmartisk in https://github.com/langchain4j/langchain4j/pull/4550
• Simplify and generalize HumanInTheLoop agent by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4566
• Add Micronaut integration link to intro.md by @sdelamo in https://github.com/langchain4j/langchain4j/pull/4561
• Centralize MCP traffic logger configuration by @harikrishna553 in https://github.com/langchain4j/langchain4j/pull/4564
• feat: add new "customHeaders" property to MistralAiClient by @Skraye in https://github.com/langchain4j/langchain4j/pull/4569
• Fix HumanInTheLoop agent when invoked by the supervisor by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4574
• feat: Make customizable the creation of the vector extension for PGVe… by @odelpozo-denodo in https://github.com/langchain4j/langchain4j/pull/4576
• fix(PgVector): Clean-up schema name from table name before creating the indices by @maylorian in https://github.com/langchain4j/langchain4j/pull/4592
• Rework propagation of inherited listeners and bound agentic tool observability events to respective agent by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4581
• docs: add Thinking / Reasoning section to Mistral AI documentation by @dskarzh in https://github.com/langchain4j/langchain4j/pull/4586
• Allows non-AI agent to be invoked with any number and type of arguments by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4605
• Fix NPE when toolCall.index() is null in OpenAI streaming (#4573) by @mohankumar27 in https://github.com/langchain4j/langchain4j/pull/4583
• feat: parse and surface anthropic streaming error event by @Wal8800 in https://github.com/langchain4j/langchain4j/pull/4579
• Raw response documenmtation for MistralAi and Anthropic by @HostedDinner in https://github.com/langchain4j/langchain4j/pull/4610
• Add docs for browser use engines by @vesense in https://github.com/langchain4j/langchain4j/pull/4618
• Add security warning for code execution risks by @vesense in https://github.com/langchain4j/langchain4j/pull/4619
• fix(mcp): allow setting HTTP/1.1 in StreamableHttpMcpTransport by @OiPunk in https://github.com/langchain4j/langchain4j/pull/4584
• Subsidiary SSE channel for Streamable HTTP by @jmartisk in https://github.com/langchain4j/langchain4j/pull/4624
• Initial implementation for parallel multi instance by @salaboy in https://github.com/langchain4j/langchain4j/pull/4616
• Tools: Support Optional parameter as alternative to @P(required) by @linnaung in https://github.com/langchain4j/langchain4j/pull/4508
• Implement embedding removal methods for Weaviate embedding store by @mohit-200 in https://github.com/langchain4j/langchain4j/pull/4578
• Add strict option for JSON schema response format to Mistral AI by @xhaggi in https://github.com/langchain4j/langchain4j/pull/4603
• fix(vertexai-gemini): support anyOf and null schema elements in tool mapping by @OiPunk in https://github.com/langchain4j/langchain4j/pull/4625
• Add example for Browser use tool by @vesense in https://github.com/langchain4j/langchain4j/pull/4626
• Complete implementation of the parallel mapper agent by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4628
• Update embedding stores table with new integrations by @vesense in https://github.com/langchain4j/langchain4j/pull/4629
• Make sure the HibernateEmbeddingStore also works with Hibernate ORM 7.1 by @beikov in https://github.com/langchain4j/langchain4j/pull/4631
• Mention the MCP client key when logging health check failure by @jmartisk in https://github.com/langchain4j/langchain4j/pull/4634
• Close subprocess stdin before its stdout by @jmartisk in https://github.com/langchain4j/langchain4j/pull/4635
• Documentation for langchain4j-community-model-router by @hkuhn42 in https://github.com/langchain4j/langchain4j/pull/4639
• Make agents implementing MonitoredAgent to be automatically monitored by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4640
• Allows to mix programmatic and declarative API defining agentic patterns by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4647
• Jackson: updated to 2.21.1 by @dliubarskyi in https://github.com/langchain4j/langchain4j/pull/4654
• Add systemMessageTransformer and toolProviders to agent builder by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4657
• Add multimodality support for untyped agents by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4656
• Add Skills section to introduction documentation by @vesense in https://github.com/langchain4j/langchain4j/pull/4659
• Prevent duplicated tool providers by @mariofusco in https://github.com/langchain4j/langchain4j/pull/4660
• Update GPULlama3.java version to 0.4.0 for jdk25 by @mikepapadim in https://github.com/langchain4j/langchain4j/pull/4213

New Contributors

• @sdelamo made their first contribution in https://github.com/langchain4j/langchain4j/pull/4561
• @Skraye made their first contribution in https://github.com/langchain4j/langchain4j/pull/4569
• @maylorian made their first contribution in https://github.com/langchain4j/langchain4j/pull/4592
• @Wal8800 made their first contribution in https://github.com/langchain4j/langchain4j/pull/4579
• @Sus4nne made their first contribution in https://github.com/langchain4j/langchain4j/pull/4556
• @OiPunk made their first contribution in https://github.com/langchain4j/langchain4j/pull/4584
• @salaboy made their first contribution in https://github.com/langchain4j/langchain4j/pull/4616
• @mohit-200 made their first contribution in https://github.com/langchain4j/langchain4j/pull/4578
• @xhaggi made their first contribution in https://github.com/langchain4j/langchain4j/pull/4603
• @beikov made their first contribution in https://github.com/langchain4j/langchain4j/pull/4622
• @brunobat made their first contribution in https://github.com/langchain4j/langchain4j/pull/4597
• @hkuhn42 made their first contribution in https://github.com/langchain4j/langchain4j/pull/4639

Full Changelog: https://github.com/langchain4j/langchain4j/compare/1.11.0...1.12.1