langchain 0.7.8+1

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• BUILD: Update dependencies (#751). (250a3c6)

• FEAT: Implement Markdown text splitter (#635). (242e4be2)
• FEAT: Update dependencies (requires Dart 3.6.0) (#709). (9e3467f7)
• FEAT: Add to/fromMap serialization to ChatMessage, PromptValue & ChatHistory (#681). (d239c7c7)
• FIX: Correctly calculate start_index when using chunkOverlap in TextSplitter (#640). (71dd5ac3)
• FIX: Fix linter issues (#656). (88a79c65)
• FIX: Made apiKey optional for TavilyAnswerTool and TavilySearchResultsTool (#646). (5085ea4a)

• FEAT: Add support for DirectoryLoader (#620). (4730f2a3)
• REFACTOR: Add new lint rules and fix issues (#621). (60b10e00)

• FIX: UUID 'Namespace' can't be assigned to the parameter type 'String?' (#566). (1e93a595)

• REFACTOR: Update deprecated UUID constant (#558). (8d9f14b4)

• FEAT: Add retry support for Runnables (#540). (1099725d)

• FEAT: Add ToolsAgent for models with tool-calling support (#530). (f3ee5b44)
• FEAT: Deprecate OpenAIToolsAgent in favour of ToolsAgent (#532). (68d8011a)
• DOCS: Add Code Assist AI in README and documentation (#538). (e752464c)

• FEAT: Add Fallback support for Runnables (#501). (5887858d)
• FEAT: Implement additive options merging for cascade bind calls (#500). (8691eb21)
• REFACTOR: Remove default model from the language model options (#498). (44363e43)
• REFACTOR: Depend on exact versions for internal 1st party dependencies (#484). (244e5e8f)
• DOCS: Update README.md with Ollama tool call support. (e016b0bd)

Note: Anthropic integration (ChatAnthropic) is now available in the new langchain_anthropic package.

• FEAT: Add support for TavilySearchResultsTool and TavilyAnswerTool (#467). (a9f35755)
• DOCS: Document existing integrations in README.md. (cc4246c8)

Note: ObjectBox Vector DB integration (ObjectBoxVectorStore) is now available in the langchain_community package.

• FEAT: Add support for ObjectBoxVectorStore (#438). (81e167a6)
  • Check out the ObjectBoxVectorStore documentation
• REFACTOR: Migrate to langchaindart.dev domain (#434). (358f79d6)

Note: VertexAI for Firebase (ChatFirebaseVertexAI) is now available in the new langchain_firebase package.

• DOCS: Add docs for ChatFirebaseVertexAI (#422). (8d0786bc)
• DOCS: Update ChatOllama docs (#417). (9d30b1a1)

Note: This release has breaking changes.
If you are using "function calling" check how to migrate to "tool calling".

• BREAKING FEAT: Migrate from function calling to tool calling (#400). (44413b83)
• BREAKING REFACTOR: Improve Tool abstractions (#398). (2a50aec2)

• FIX: Allow async functions in Runnable.mapInput (#396). (e4c35092)

Note: This release has breaking changes.
If you are using Runnable.fromFunction check the migration guide.

• FEAT Add support for RunnableRouter (#386). (827e262)
• FEAT: Add support for Runnable.mapInputStream (#393). (a2b6bbb5)
• FEAT: Add support for JsonOutputParser (#392). (c6508f0f)
• FEAT: Reduce input stream for PromptTemplate, LLM, ChatModel, Retriever and Tool (#388). (b59bcd40)
• BREAKING FEAT: Support different logic for streaming in RunnableFunction (#394). (8bb2b8ed)
• DOCS: Update LangChain Expression Language documentation (#395). (6ce75e5f)

• DOCS: Update README.md. (8139113a)

Note: This release has breaking changes.
Migration guide

• BREAKING REFACTOR: Introduce langchain_core and langchain_community packages (#328). (5fa520e6)
• BREAKING REFACTOR: Simplify LLMResult and ChatResult classes (#363). (ffe539c1)
• BREAKING REFACTOR: Simplify Output Parsers (#367). (f24b7058)
• BREAKING REFACTOR: Remove deprecated generate and predict APIs (#335). (c55fe50f)
• REFACTOR: Simplify internal .stream implementation (#364). (c83fed22)
• FEAT: Implement .batch support (#370). (d254f929)
• FEAT: Add reduceOutputStream option to StringOutputParser (#368). (7f9a9fae)
• DOCS: Update LCEL docs. (ab3ab573)
• DOCS: Add RAG example using OllamaEmbeddings and ChatOllama (#337). (8bddc6c0)

• FEAT: Update meta and test dependencies (#331). (912370ee)

• DOCS: Update Supabase docs. (4a2a5329)
• DOCS: Update CHANGELOG.md. (d0d46534)

• DOCS: Update embeddings documentation (#313). (43463481)

• DOCS: Add Anyscale and Together AI documentation (#305). (7daa3eb0)

• REFACTOR: Make all LLM options fields nullable and add copyWith (#284). (57eceb9b)
• FIX: Export ConversationSummaryMemory (#283). (76b01d23)
• FEAT: Update internal dependencies (#291). (69621cc6)

• FIX: Export token_buffer.dart (ConversationTokenBufferMemory) (#280). (265fcb4b)

• FEAT: Make ChatPromptTemplates more convenient to use (#275). (9f8e6f75)

Note: This release has breaking changes.
Migration guide

• BREAKING REFACTOR: Make MIME Type mandatory for base64 images in prompt (#269). (2fe076bb)
• FEAT: Allow to pass options to countTokens method (#268). (4ecb123b)
• DOCS: Update README.md and docs (#272). (306a1fdd)

• FEAT: Support customizing Tool input description (#258). (a9a1b2a0)
• DOCS: Update Mistral AI documentation (#265). (59b4127e)

Note: This release has breaking changes.

Migration guides:

• Retriever
• Tools

• BREAKING FEAT: Move all retriever config options to RetrieverOptions (#248). (f5785b77)
• BREAKING FEAT: Allow to pass call options to tools (#243). (4a01adb9)
• FEAT: Allow to mutate default options (#256). (cb5e4058)
• REFACTOR: Use JsonPath.readValues in JsonLoader (#245). (3e159254)
• FIX: Out of rage error in ConversationBufferWindowMemory (#249). (1b38bff7)
• FIX: PromptTemplate stream should only emit if it has all inputs (#247). (a56a2ec5)

• FIX: Conditionally import dart:io in LocalFileStore (#237). (71d337e6)

• FEAT: Add support for OpenAIDallETool (#231). (541e8d77)
• FEAT: Support implementing custom agents using LCEL (#230). (625eeeb4)
• FEAT: Add support for Runnable.mapInput() (#229). (7cc832ca)
• REFACTOR: Rename RunnableMapFromItem to RunnableMapFromInput (#228). (7330cfcd)
• REFACTOR: Improve handling of input and output keys in chains (#227). (acf76b24)

• DOCS: Update README.md (#225). (afff8567)

• DOCS: Add public_member_api_docs lint rule and document missing APIs (#223). (52380433)

Note: This release has breaking changes.
Migration guide

• BREAKING FEAT: Add multi-modal messages support with OpenAI Vision (#220). (6da2e069)

• FEAT: Add streaming support in LangChain Expression Language (#192). (2e4bcf91)
• DOCS: Add streaming to docs. (bb87c190)
• FEAT: Add streaming support to OutputFunctionsParsers (#194). (8b4e6a13)
• FIX: Remove unused generic param in StringOutputParser (#193). (decd3176)

Note: This release has breaking changes.

• REFACTOR: Don't require implement getFormatInstructions. (d8b1286d)
• DOCS: Update docs. (af7ee827)
• BREAKING FIX: Change loaders lastModified metadata field to integer (#172). (72c724f8)
• BREAKING FEAT: Update uuid internal dependency to 4.x.x (#173). (b01f4afe)

Check out the LangChain Expression Language documentation for more details

• FEAT: Add support for JsonOutputFunctionsParser (#165). (66c8e644)
• FEAT: Add support for StringOutputParser (#164). (ee29e99a)
• FEAT: Implement LangChain Expression Language (LCEL) (#163). (85ea41af)
• FEAT: Support custom doc prompt in StuffDocumentsQAChain (#157). (faa9d2d7)

Note: This release has breaking changes.

• DOCS: Acknowledge sponsors in readme. (092d94c8)
• DOCS: Add topics to pubspecs. (8c1d6297)
• BREAKING REFACTOR: Change embedDocuments input to List<Document> (#153). (1b5d6fbf)

Note: This release has breaking changes.

• DOCS: Update readme. (e1b5b295)
• BREAKING REFACTOR: Remove addDocuments from VectorStoreRetriever (#146). (d32a5fd9)
• BREAKING REFACTOR: Rename VectorStoreRetrieverMemory and require vector store (#145). (67af3195)

• FEAT: Add support for Chroma VectorStore (#139). (098783b4)
• DOCS: Update readme. (b61eda5b)

• FEAT: Support filtering in MemoryVectorStore (#137). (84da480f)
• FEAT: Support filtering in VertexAI Matching Engine (#136). (768c6987)
• FEAT: Allow to pass vector search config (#135). (5b8fa5a3)
• DOCS: Fix API documentation errors (#138). (1aa38fce)

• REFACTOR: Rename store folder to chat_message_history (#126). (fa54c7e2)
• REFACTOR: Fix Dart 3.1.0 linter issues (#125). (cc32f3f1)
• FEAT: Add support for LocalFileStore (#132). (2c508dce)
• FEAT: Add support for CacheBackedEmbeddings (#131). (27d8b777)
• FEAT: Add FakeEmbeddings testing model (#130). (f06920d7)
• FEAT: Add support for EncoderBackedStore (#129). (85bb3191)
• FEAT: Add support for InMemoryStore (#128). (699c0904)
• FEAT: Add support for InMemoryDocStore (#127). (d9d7268d)
• FEAT: Initial vectors, ids, and delete in MemoryVectorStore (#123). (f87a738d)

• FIX: Text splitters were not preserving docs IDs (#122). (a9d7f098)

• FEAT: Integrate Vertex AI Matching Engine vector store (#103). (289c3eef)
• DOCS: Update readme. (a64860ce)
• DOCS: Update readme. (8a58f4a1)

• REFACTOR: Move Vertex AI client to its own package (#111). (d8aea156)
• REFACTOR: Always await or explicitly discard Futures (#106). (989e93db)
• FIX: Fix OpenAIQAWithSourcesChain returning empty strings (#113). (6181ff8d)
• FIX: VectorStore k variable was ignored (#110). (80e61eb7)
• FEAT: Integrate Google Vertex AI PaLM Chat Model (#99). (3897595d)
• FEAT: Integrate Google Vertex AI PaLM Text model (#98). (b2746c23)

• FIX: OpenAIOptions class not exported (#104). (e50efc3d)
• DOCS: Improve RetrievalQAChain API documentation (#95). (e6d0a9d3)

• FIX: Suff and MapReduce docs chains don't handle chat messages (#92). (19182ca1)
• FEAT: Update AgentExecutor constructor to use agent's tools (#89). (3af56a45)
• FEAT: Add MessagePlaceholder (#87). (23ee95b6)
• DOCS: Update CONTRIBUTING.md. (5f2b9264)
• DOCS: Fix typo in MessagePlaceholder API docs (#90). (f53e1a2b)

• REFACTOR: Extract default memory key and prefixes to constants. (750fd01a)
• FIX: systemChatMessage was ignored in OpenAIFunctionsAgent (#86). (cfe1e009)
• FIX: Allow to add memory to an agent executor (#80). (8110464c)
• FEAT: Add ConversationSummaryMemory (#27). (f631d9e5)
• FEAT: Support LLMChain in OpenAIFunctionsAgent and memory. (bd4a1cb9)
• FEAT: Return ChatMessage when LLMChain used with ChatModel. (bb5f4d23)
• FEAT: Add FakeChatModel for testing purposes. (659783a6)
• FEAT: Add support for ConversationTokenBufferMemory (#26). (8113d1c0)
• FEAT: Improve SummarizeChain.mapReduce summaryMaxTokens name and docs. (0be06e02)
• FEAT: Add support for CsvLoader (#77). (41d24e76)
• FEAT: Add ConversationBufferWindowMemory (#25). (9c271f7e)

• FIX: Loaders tests. (f0498300)
• FEAT: Update internal dependencies (including http to 1.1.0). (8f3e8bc8)
• FEAT: Add support for VectorStoreRetrieverMemory (#54). (72cd1b10)

• FIX: OpenAIQAWithSourcesChain throws exception. (45c6cb9d)
• FEAT: Add support for SummarizeChain (#58). (9499fc04)
• FEAT: Add support for SequentialChain class (#30). (381a6768)
• FEAT: Add support for WebBaseLoader (#74). (0b5bf4b0)
• FEAT: Add Support for JsonLoader (#72). (2457a973)
• FEAT: Add support for MapReduceDocumentsChain (#59). (9f2190c4)
• FEAT: Add support for ReduceDocumentsChain (#70). (34cf10bd)
• FEAT: Support estimating the number of tokens for a given prompt (#3). (e22f22c8)
• FEAT: Add support for CodeTextSplitter (#63). (92a8c7da)
• FEAT: Add support for RecursiveCharacterTextSplitter (#61). (697cdcbf)
• DOCS: Document sequential chain. (b9693a4e)
• DOCS: Document text, json and web loaders. (a95b3e9f)
• DOCS: Update API docs. (7bfa6d17)
• DOCS: Update readme. (dd394715)

• Initial public release.

Check out the announcement post for all the details: https://blog.langchaindart.dev/introducing-langchain-dart-6b1d34fc41ef

• Add support for Agent class (#33).
• Add support for AgentExecutor class (#56).
• Update hello_world_flutter example with local models.

• Add support for PipelinePromptTemplate class (#18).
• LLMChain improvements (#43).

• Add support for TextLoader (#47).
• Add support for BaseLoader (#46).
• Add support for RetrievalQAChain class (#42).
• Add support for StuffDocumentsQAChain (#50).
• Add support for StuffDocumentsChain (#49).
• Add support for BaseCombineDocumentsChain class (#41).
• Add support for ConditionalPromptSelector (#48).
• Add support for VectorStoreRetriever class (#45).
• Add support for MemoryVectorStore class (#44).
• Add support for VectorStore class (#36).
• Add support for OpenAIEmbeddings (#38).
• Add support for CharacterTextSplitter class (#39).
• Add support for OpenAI functions (#35).
• Add support for Calculator tool (#32).
• Add support for Tool class (#31).

• Add support for LLMChain class (#20).
• Add support for ChatMessageHistory class (#29).
• Add support for ConversationBufferMemory class (#24).
• Add support for ConversationChain (#21).
• Add support for SimpleMemory class (#23).

• Add support for ChatPromptTemplate class (#8).

• Add support for LLMs - BaseLLM class (#14).
• Add support for Chat models - BaseChatModel class (#10).
• Add support for prompt templates - PromptTemplate class (#7).
• Publish LangChain.dart documentation on http://langchaindart.dev.

• Bootstrap project.