https://pypi.org/project/langchain-proofslip/ Recent updates to the Python Package Index for langchain-proofslip en https://pypi.org/project/langchain-proofslip/0.1.0/ LangChain tools for ProofSlip — ephemeral receipt-based verification for AI agent workflows johnny@z13labs.com Sun, 05 Apr 2026 08:33:40 GMT