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* feat: add script to build static component index for fast startup This script generates a prebuilt index of all built-in components in the lfx.components package, saving it as a JSON file for quick loading at runtime. It includes versioning and integrity verification through SHA256 hashing. * chore: update package dependencies and versioning - Bump revision to 3 in uv.lock. - Update dependency markers for several packages to improve compatibility with Python versions and platforms. - Increment versions for langflow (1.6.4) and langflow-base (0.6.4). - Adjust dependency markers for packages related to darwin platform to enhance specificity. * chore: update .gitignore to include component index cache - Added entry for user-specific component index cache directory to .gitignore. - Included member_servers.json in the ignore list for better file management. * feat: enhance component loading with custom index support - Introduced functions to detect development mode and read a custom component index from a specified path or URL. - Added caching mechanism for dynamically generated component indices to improve performance. - Updated `import_langflow_components` to utilize the new index reading and caching logic, allowing for faster startup in production mode. - Added `components_index_path` to settings for user-defined index configuration. * feat: add GitHub Actions workflow to automatically update component index - Introduced a new workflow that triggers on pull requests and manual dispatch to update the component index. - The workflow checks for changes in the component index and commits updates if necessary. - Added a comment feature to notify users when the component index is updated. * [autofix.ci] apply automated fixes * fix: enhance development mode detection logic - Updated the `_dev_mode` function to improve clarity and functionality in detecting development mode. - Refined environment variable checks to explicitly handle "1"/"true"/"yes" for development and "0"/"false"/"no" for production. - Maintained the editable install heuristic as a fallback for determining the mode when the environment variable is not set. * refactor: simplify development mode detection logic - Revised the `_dev_mode` function to clarify the detection of development mode. - Removed the editable install heuristic, making the environment variable `LFX_DEV` the sole determinant for development mode. - Updated documentation to reflect the new behavior and ensure accurate understanding of the mode switching. * docs: update DEVELOPMENT.md to clarify component development mode - Added tips for enabling dynamic component loading with `LFX_DEV=1` for faster development. - Emphasized the importance of using `LFX_DEV=1` for live reloading of components during development. - Included instructions for manually rebuilding the component index for testing purposes. * add component index * test: add unit tests for component index functionality - Introduced comprehensive unit tests for the component index system, covering functions such as _dev_mode, _read_component_index, _save_generated_index, and import_langflow_components. - Tests include various scenarios for development mode detection, reading and saving component indices, and handling custom paths and URLs. - Enhanced test coverage to ensure robustness and reliability of the component index features. * chore: update GitHub Actions workflow for component index updates - Modified the workflow to include separate checkout steps for pull requests and manual dispatch events. - Added an environment variable `LFX_DEV` to the build step for enhanced development mode support. - Improved clarity in the workflow structure to accommodate different triggering events. * chore: update component index with new timezones and remove deprecated entries - Added new timezone options including America/Boise, Australia/North, and Etc/GMT-2. - Removed outdated timezone entries to streamline the selection process. - Updated the component index structure to enhance clarity and maintainability. * docs: clarify output path determination in build_component_index.py - Updated comment to specify that the output path is relative to the script location and intended for development/CI use, not from the installed package. - Enhanced clarity for future developers regarding the script's execution context. * refactor: update component import logic and structure - Changed the comment to reflect the correct module path for extracting subpackage names. - Flattened the custom components dictionary if it has a "components" wrapper for consistency. - Merged built-in and custom components into a single structure, ensuring the output maintains a "components" wrapper. - Updated the component count calculation to reflect the new merged structure. * refactor: streamline component merging logic - Simplified the merging of built-in and custom components by removing the "components" wrapper at the cache level. - Updated the component count calculation to directly reflect the new structure of the merged components. - Enhanced code clarity by refining comments related to the merging process. * chore: enhance GitHub Actions workflow for component index updates - Updated the workflow to conditionally comment on pull requests from community forks, instructing users to manually update the component index. - Refined the commit and push logic to ensure it only executes for changes made within the same repository. * chore: update component index [skip ci] * chore: refine GitHub Actions workflow for component index checks - Enhanced the logic to check for changes in the component index file, ensuring it only triggers actions for changes made within the same repository. - Updated the PR comment step to clarify that it applies only to pull requests from the same repository, improving workflow accuracy. * chore: update component index [skip ci] * chore: update component index [skip ci] * refactor: rename version retrieval function for clarity - Changed the function name from _get_lfx_version to _get_langflow_version to accurately reflect the version being retrieved. - Updated the version retrieval logic in the build_component_index function to use the new function name. * fix: update version check to reflect langflow instead of lfx - Changed the version check logic in the _read_component_index and _save_generated_index functions to use "langflow" instead of "lfx". - Ensured that the component index version matches the installed langflow version for better accuracy. * fix: sort timezone options in CurrentDateComponent - Updated the timezone options in the CurrentDateComponent to be sorted for better user experience. - Ensured that the dropdown displays timezones in a consistent and organized manner. * chore: update component index with new timezone options and MistralAI model configurations - Replaced outdated timezone options with a more relevant and diverse set for improved user experience. - Added new configurations for the MistralAI model component, including input fields for API key, model selection, and request parameters. - Updated version number to reflect recent changes. * chore: update component index [skip ci] * chore: update component index [skip ci] * chore: update component index [skip ci] * chore: update component index [skip ci] * chore: minify component index output to reduce file size * test: Add unit tests for build_component_index script functionality * chore: enhance push logic in update-component-index workflow to handle concurrent updates with retries * chore: update component index [skip ci] * fix: standardize logging messages for MCP server initialization * chore: update component index [skip ci] * test: Add unit tests for build_component_index script functionality * chore: update component index [skip ci] * fix: improve error handling for missing LangChain dependencies in run.py * feat: add deterministic normalization for component index serialization * chore: update component index [skip ci] * chore: update component index * chore: update component index * chore: update component index * chore: enhance component index update workflow with detailed diff statistics and SHA256 comparison * chore: update component index * chore: update component loading message to reflect total components discovered * chore: sort model options for improved readability in NVIDIA component * chore: filter out 'localtime' from timezone options for improved user experience * chore: update component index with sorted lists * chore: update component index with mistral * chore: update component index * fix: improve error message for langflow tests to include detailed instructions for environment setup * refactor: rename and enhance _dev_mode function to _parse_dev_mode for improved clarity and functionality; support boolean and list modes for module loading * docs: enhance DEVELOPMENT.md with updated instructions for Component Development Mode, including dynamic loading options for specific components * fix: enhance error handling in _read_component_index to log specific issues with fetching and parsing component indices, including corrupted JSON and missing SHA256 hash * chore: update component index * feat: add metadata to component index including number of modules and components for improved indexing information * feat: integrate telemetry for component index loading, capturing metrics on modules and components, and enhancing performance tracking * feat: add build command for dynamic component index generation * fix: add missing import for json in CustomComponent definition in LoopTest.json * fix: improve handling of dotted imports in prepare_global_scope function * chore: update component index * fix: refine import handling in prepare_global_scope to correctly manage aliased and dotted imports * chore: update component index * feat: enhance component index update workflow with detailed change analysis and summary --------- Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com> Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Caution
- Langflow versions 1.6.0 through 1.6.3 have a critical bug where
.envfiles are not read, potentially causing security vulnerabilities. DO NOT upgrade to these versions if you use.envfiles for configuration. Instead, upgrade to 1.6.4, which includes a fix for this bug.- Windows users of Langflow Desktop should not use the in-app update feature to upgrade to Langflow version 1.6.0. For upgrade instructions, see Windows Desktop update issue.
- Users must update to Langflow >= 1.3 to protect against CVE-2025-3248
- Users must update to Langflow >= 1.5.1 to protect against CVE-2025-57760
For security information, see our Security Policy and Security Advisories.
Langflow is a powerful tool for building and deploying AI-powered agents and workflows. It provides developers with both a visual authoring experience and built-in API and MCP servers that turn every workflow into a tool that can be integrated into applications built on any framework or stack. Langflow comes with batteries included and supports all major LLMs, vector databases and a growing library of AI tools.
✨ Highlight features
- Visual builder interface to quickly get started and iterate .
- Source code access lets you customize any component using Python.
- Interactive playground to immediately test and refine your flows with step-by-step control.
- Multi-agent orchestration with conversation management and retrieval.
- Deploy as an API or export as JSON for Python apps.
- Deploy as an MCP server and turn your flows into tools for MCP clients.
- Observability with LangSmith, LangFuse and other integrations.
- Enterprise-ready security and scalability.
⚡️ Quickstart
Langflow requires Python 3.10 to 3.13 and uv.
- To install Langflow, run:
uv pip install langflow -U
- To run Langflow, run:
uv run langflow run
- Go to the default Langflow URL at
http://127.0.0.1:7860.
For more information about installing Langflow, including Docker and Desktop options, see Install Langflow.
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Langflow is completely open source and you can deploy it to all major deployment clouds. To learn how to use Docker to deploy Langflow, see the Docker deployment guide.
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