requirements.txt

--extra-index-url https://download.pytorch.org/whl/cpu

# CPU-only torch; 2.5.0 is the earliest with Python 3.13 wheels
torch>=2.5.0,<2.13

# Core retrieval stack
sentence-transformers>=3.0.0,<6.0
transformers>=4.40.0,<5.0
faiss-cpu>=1.8.0
bm25s>=0.2.0

# Data
pandas>=2.0.0,<3.0
pyarrow>=15.0.0
numpy>=1.24.0,<2.0

# UI — pinned to match the sdk_version in README YAML frontmatter
gradio==4.44.0

# Starlette 1.0 changed TemplateResponse signature; Gradio 4.44 still uses the old API.
starlette<1.0

# Pydantic 2.11+ emits boolean values for some JSON schema fields, which crashes
# gradio_client 1.3's schema parser. Pin to 2.10.x until we bump Gradio.
pydantic>=2.10.0,<2.11

# Python 3.13 removed the stdlib audioop module which pydub (Gradio dep) needs.
audioop-lts<1.0; python_version >= "3.13"