Coauthor proposal: LF x402 privacy extension draft (Bermuda + TACEO + zBase)

[goheesheng]

We are coordinating a coauthored LF x402 privacy-extension draft and want Bermuda/b402 in the author set.

Draft: https://github.com/goheesheng/zx402/blob/main/beta/docs/competitive/joint-x402-privacy-spec.md

Focus: additive extension fields + verifier API + compliance attestation hooks so private settlement implementations remain interoperable.

If aligned, we propose:

1. 30-minute technical alignment call next week,
2. shared conformance vectors,
3. coauthored v0.1 submission into the LF x402 standards track.

Concrete review asks for Bermuda:

• Confirm extension field naming compatibility with b402 integration flows.
• Confirm preferred verifier/receipt API shape for provider interoperability.
• Flag governance path for submitting via LF x402 working track.

Happy to adapt this into a PR against docs if that is easier for your process.