Meeting Summary – AI Agent Protocol CG (2025-12-17)

Dear all,

Apologies for the slight delay in sharing the meeting summary.
The minutes from the *AI Agent Protocol CG meeting held on December 17,
2025* have now been compiled. Please review them at the link below and feel
free to provide any feedback:

Meeting minutes:
https://github.com/w3c-cg/ai-agent-protocol/blob/main/meetings/2025-12-17.md

This meeting was the final meeting of the year and focused primarily on *agent
authentication and cross-platform identity mechanisms*. Sean presented a
requirements-driven framework for agent identity, emphasizing the
separation of authentication from authorization, the use of cryptographic
identities, support for both automated and human-authenticated signatures,
and enabling cross-platform interoperability while preserving user and
agent privacy.

George expressed appreciation for the requirements-based approach, while
suggesting that implementation options should not be limited to Web DIDs
alone. He encouraged the group to also consider alternatives such as client
attestation and client ID metadata, and highlighted the tension between
ephemeral identifiers and compliance requirements, particularly in
regulated domains like financial services.

The discussion further explored *agent trust dynamics*, including the
distinction between instance identifiers and class identifiers. The group
discussed scenarios such as repeat transactions, where agents or users may
prefer more stable identifiers, while still retaining privacy controls. On
security topics, Roy raised questions about public-private key
cryptographic standards and mutual authentication. Sean confirmed that
mutual authentication is essential to prevent man-in-the-middle attacks and
to ensure secure agent-to-agent transactions.

Regarding the GitHub pull request, the group agreed to keep it open through
early January to allow for further review. Sean will add additional
diagrams, flow charts, and tables to improve clarity, readability, and
consistency with other sections of the specification.

For reference, the previous meeting minutes (November 5, 2025) are
available here:
https://github.com/w3c-cg/ai-agent-protocol/blob/main/meetings/2025-11-05.md

The next meeting is planned for *January 14, 2026*. Further details and the
agenda will be shared closer to the date.

Thank you all for your continued contributions throughout the year, and
best wishes for the holiday season.

Best regards,
Song and Gaowei