What's Changed

✨ New Features

• feat: update Anthropic Tool calling model list and filters by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7630
• feat: Adds MCP_SSE to be filled from frontend by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7594
• feat: add EmbeddingModelComponent for generating embeddings by @rodrigosnader in https://github.com/langflow-ai/langflow/pull/7204
• feat: add deprecation warning for AUTO_LOGIN by @ogabrielluiz in https://github.com/langflow-ai/langflow/pull/7691
• feat: add component utils functions for dynamic input actions by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7748
• feat: add observable UX for community interaction tracking by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7512
• feat: Allow dropdown to add new values when they don't exist in options list by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7641
• feat: deprecate combine text and update templates by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7690
• feat: add Composio Slack component by @abhishekpatil4 in https://github.com/langflow-ai/langflow/pull/7751
• feat: new tool mode dialog and UI by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7647
• feat: Add Composio Google Calendar component by @abhishekpatil4 in https://github.com/langflow-ai/langflow/pull/7662
• feat: NV-ingest image extraction and authentication support by @jeffreyscarpenter in https://github.com/langflow-ai/langflow/pull/7795
• feat: ability to run flow without langflow server by @barnuri in https://github.com/langflow-ai/langflow/pull/7507
• feat: add new models to OLLAMA_EMBEDDING_MODELS and OLLAMA_TOOL_MODELS_BASE by @vitaliimos in https://github.com/langflow-ai/langflow/pull/7586
• feat: Add MCP Server Settings to projects, rename Folder to Project by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7741
• feat: deprecate Gmail Loader Component by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7844
• feat: Change default event delivery method to streaming by @ogabrielluiz in https://github.com/langflow-ai/langflow/pull/7851
• feat: Enhance main interface by ensuring persistent navbar visibility by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7889
• feat: event polling can process more than one event at a time by @ogabrielluiz in https://github.com/langflow-ai/langflow/pull/7858

🐛 Bug Fixes

• fix: improve composio gmail component stability by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7673
• fix: Embedding model component format issues by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7733
• fix: make pydantic-settings less strict to avoid deps conflicts by @barnuri in https://github.com/langflow-ai/langflow/pull/7726
• fix: Adding Node to Dockerfile by @Yukiyukiyeah in https://github.com/langflow-ai/langflow/pull/7735
• fix: make composio icon color black in white mode by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7698
• fix: Enhance error handling with new constants in flow management components (devx) by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7562
• fix: Enhance Growth UI Layout and Consistency by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7768
• fix: support mcp env vars and nested inputs by @phact in https://github.com/langflow-ai/langflow/pull/7772
• fix: make dropdown not repeat values on update, update mcp component by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7779
• fix: Standardize font sizes using Tailwind classes across frontend components by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7770
• fix: Reduce spacing in EmptyPageCommunity component from gap-12 to gap-7 by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7783
• fix: remove incorrect use of logging that caused log spam by @ogabrielluiz in https://github.com/langflow-ai/langflow/pull/7763
• fix: display errors when webhook background tasks fail by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7572
• fix: Traces Export & Logs Type Casting For Arize & Phoenix Integration by @ialisaleh in https://github.com/langflow-ai/langflow/pull/7693
• fix: Improve spacing, alignment and consistency across components with icon enhancement by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7792
• fix: text access in file component by @jordanrfrazier in https://github.com/langflow-ai/langflow/pull/7798
• fix: cleanup worker test stability by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7826
• fix: streaming now works on Agent and ChatOutput by @ogabrielluiz in https://github.com/langflow-ai/langflow/pull/7833
• fix: Dict Input Validation issue in Dynamic Components by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7754
• fix: remove quick flash with already rendered icons by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7828
• fix: Enhance Folder Sidebar Readability - increase Font Sizes and Adjust Layout Dimensions by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7832
• fix: change note toolbar wrong import that causes wrong padding by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7847
• fix: make icons display correctly in composio dialog by @deon-sanchez in https://github.com/langflow-ai/langflow/pull/7708
• fix: update NestedDictInput value type to remove unnecessary Data option by @deon-sanchez in https://github.com/langflow-ai/langflow/pull/7437
• fix: make code button flash, fix mcp icon color by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7848
• fix: update texts on mcp component and tab, fix icons not updating by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7850
• fix: Update EmptyPageCommunity button dimensions and simplify icon positioning by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7854
• fix: Enhance Gmail API Component with Field Extraction, Add Flow Locking, and Improve Test Stability (nightly fix) by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7864
• fix: make component test pass if component tab is not present by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7865
• fix: transaction logging of pandas dataframes by @jordanrfrazier in https://github.com/langflow-ai/langflow/pull/7716
• fix: voice mode progress reliability by @nv-nfreybler in https://github.com/langflow-ai/langflow/pull/7830
• fix: Icons on dropdown are inconsistent when search/selecting by @deon-sanchez in https://github.com/langflow-ai/langflow/pull/7875
• fix: Streaming for anthropic models in Agents by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7871
• fix: update templates containing Agent and Tool components by @ogabrielluiz in https://github.com/langflow-ai/langflow/pull/7860
• fix: run flow multiple execution in tool mode by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7873
• fix: Agent execution time duration display in streaming mode by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7852
• fix: playground page allowing image upload even if feature flag is disabled by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7877
• fix: Update folder progress component sizing and correct analytics event name by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7879
• fix: get backend url dynamically for mcp by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7878
• fix: disable images on playground by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7881
• fix: correct typo in pretty-logs property by @r-sniper in https://github.com/langflow-ai/langflow/pull/7886
• fix: Deprecate Google Components by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7880
• fix: anthropic Model component base url empty issue by @edwinjosechittilappilly in https://github.com/langflow-ai/langflow/pull/7872
• fix: flow_runner better run_id and support stream by @barnuri in https://github.com/langflow-ai/langflow/pull/7892
• fix: re-add name and description editing on tool mode except for Composio, fix MCP server code by @lucaseduoli in https://github.com/langflow-ai/langflow/pull/7901
• fix: truncate transaction and vertex messages by @jordanrfrazier in https://github.com/langflow-ai/langflow/pull/7893
• fix: wait on loguru to flush async logs from services by @jordanrfrazier in https://github.com/langflow-ai/langflow/pull/7908

📝 Documentation Updates

• docs: watsonx embeddings component by @mendonk in https://github.com/langflow-ai/langflow/pull/7621
• docs: v2 files api examples by @mendonk in https://github.com/langflow-ai/langflow/pull/7369
• docs: modify the langflow docker image by @mendonk in https://github.com/langflow-ai/langflow/pull/7730
• docs: OpenAPI spec version upgraded from 1.3.2 to 1.3.4 by @github-actions in https://github.com/langflow-ai/langflow/pull/7736
• docs: message history and message store example by @mendonk in https://github.com/langflow-ai/langflow/pull/7697
• docs: add chat io component examples by @mendonk in https://github.com/langflow-ai/langflow/pull/7734
• docs: second loop component example by @mendonk in https://github.com/langflow-ai/langflow/pull/7738
• docs: dataframe operations example by @mendonk in https://github.com/langflow-ai/langflow/pull/7654
• docs: if-else component example by @mendonk in https://github.com/langflow-ai/langflow/pull/7599
• Docs: api url and regex component examples by @mendonk in https://github.com/langflow-ai/langflow/pull/7680
• docs: ollama model and embeddings examples by @mendonk in https://github.com/langflow-ai/langflow/pull/7672
• docs: combine and split text component examples by @mendonk in https://github.com/langflow-ai/langflow/pull/7626
• docs: chroma and local db example by @mendonk in https://github.com/langflow-ai/langflow/pull/7695
• docs: make zep memory component legacy by @mendonk in https://github.com/langflow-ai/langflow/pull/7744
• docs: astra json tool example by @mendonk in https://github.com/langflow-ai/langflow/pull/7764
• docs: adds Discord server reference in README by @crtr0 in https://github.com/langflow-ai/langflow/pull/7902
• docs: fix Hugging Face embeddings inference inputs by @gs-costa in https://github.com/langflow-ai/langflow/pull/7843
• docs: Adding Best practices for Deploying and Running Langflow in production by @nidhimishra-datastax in https://github.com/langflow-ai/langflow/pull/7311

✅ Tests

• test: Enhance MCP server test reliability with retry logic and improved interactions (nightly fix) by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7807

Others

• chore: update test durations by @github-actions in https://github.com/langflow-ai/langflow/pull/7722
• chore: Increase timeout for codspeed workflow and fix typo in configuration by @ogabrielluiz in https://github.com/langflow-ai/langflow/pull/7598
• revert: Traces Export Headers For Arize & Phoenix Integration by @ialisaleh in https://github.com/langflow-ai/langflow/pull/7825
• ffix: Update Gmail test to assert direct result_field return instead of full data dictionary (nightly fix) by @Cristhianzl in https://github.com/langflow-ai/langflow/pull/7866
• chore: loosen langsmith version constraint by @barnuri in https://github.com/langflow-ai/langflow/pull/7869
• chore: Bump version numbers for langflow and langflow-base to 1.4.0 and 0.4.0 respectively by @ogabrielluiz in https://github.com/langflow-ai/langflow/pull/7867
• build(deps-dev): bump vite from 5.4.18 to 5.4.19 in /src/frontend by @dependabot in https://github.com/langflow-ai/langflow/pull/7870
• chore: update test durations by @github-actions in https://github.com/langflow-ai/langflow/pull/7896
• chore: Update codspeed workflow with timeout parameter by @ogabrielluiz in https://github.com/langflow-ai/langflow/pull/7903
• chore: Update CI workflow to conditionally run tests based on the presence of a label by @ogabrielluiz in https://github.com/langflow-ai/langflow/pull/7905
• chore: Upgrade codeflash to v0.12.0 by @misrasaurabh1 in https://github.com/langflow-ai/langflow/pull/7752

New Contributors

• @barnuri made their first contribution in https://github.com/langflow-ai/langflow/pull/7726
• @vitaliimos made their first contribution in https://github.com/langflow-ai/langflow/pull/7586
• @nv-nfreybler made their first contribution in https://github.com/langflow-ai/langflow/pull/7830
• @r-sniper made their first contribution in https://github.com/langflow-ai/langflow/pull/7886
• @nidhimishra-datastax made their first contribution in https://github.com/langflow-ai/langflow/pull/7311

Full Changelog: https://github.com/langflow-ai/langflow/compare/1.3.4...1.4.0