lfx-bundles

The long tail of Langflow's provider components as a single manifest-less metapackage, modeled on langchain-community. This is the destination for every vendor/third-party provider that does not warrant its own standalone distribution; the curated partner providers (OpenAI, Anthropic, AWS, DataStax, Cohere) ship as separate lfx-<provider> packages instead.

How it works

lfx-bundles declares the lfx.bundles entry point:

[project.entry-points."lfx.bundles"]
lfx_bundles = "lfx_bundles"

At startup, lfx resolves this package and folder-walks its immediate subdirectories. Each subdirectory is one bundle, registered at the @official slot under its directory name — no extension.json, no per-provider manifest. Adding a provider is just adding a folder.

src/lfx_bundles/
├── __init__.py        # bare namespace marker
├── <provider>/        # one bundle, e.g. tavily/, pinecone/, ...
│   └── *.py           # Component subclasses
└── ...

A component's identity is its bundle name (ext:<provider>:<Class>@official), which is stable whether the provider ships here or graduates to a standalone lfx-<provider> package. Because a manifest-shipping package always shadows the manifest-less metapackage, a provider can graduate with no lockstep release.

Installing

pip install langflow                   # full provider set, torch-free (langflow pins lfx-bundles[all-no-torch]; use [all] for cuga/codeagents)
pip install lfx                        # engine only, no bundles
pip install "lfx[bundles]"             # engine + this metapackage (deployment footnote)
pip install "lfx-bundles[<provider>]"  # one provider's code + that provider's SDK deps

lfx-bundles itself depends only on lfx. Each provider's third-party SDKs are optional extras (PEP 685-normalized keys, e.g. lfx-bundles[google]); the generated all extra pulls every provider's deps and is what langflow depends on, so pip install langflow is unchanged.

Adding a provider

Providers are moved here by scripts/migrate/consolidate_bundles.py, which also maintains the per-provider extras and the generated all aggregate. Do not hand-edit the extras block in pyproject.toml. Provider folder names must be lowercase snake_case (a-z, 0-9, _, 2–64 chars).