Seiji Nakaya

Honestly, we didn't design that part. The two agents ended up in different environments because of what we were building, not because I had a review method in mind: for a while I treated the gaps as something to fix. You've put it better than I did in the post: if agreement is going to mean anything, the asymmetry has to be deliberate. I'll take that as the rule now. The round that ended with less code was the uncomfortable one. Neither agent had anything invested in the four earlier fixes. I did.

Fixed is a claim about a system you have not re-broken yet", I wish I'd written that line. I didn't adopt the reproduce-first gate as a principle either. I added it after getting burned, because I needed something I couldn't argue our way past. The model being wrong three times was normal. Me accepting it three times is what needed the gate.

Spot on, and that identity layer is exactly the bet behind Vibsync, the MCP coordination layer this post is describing. Every data-plane call carries an Ed25519-signed token, and attribution is read from its claims rather than the client's word, so an agent can't spoof who it is. OAuth grants (Claude Code) are attributable to a specific person and device and revocable per device; machine tokens (CI) carry the account only and are recorded as a weaker signal instead of being silently treated as equal. Each credential is scoped to exactly one team, so a decommissioned agent is killed by revoking its credential and can't reach another team's store at all and every mutation lands in a per-team, hash-chained audit log keyed to that attested actor. One honest note since you care about the semantics: the file claims are advisory coordination locks, not a distributed mutex, a cooperative signal that stops two agents unknowingly stomping the same file, not a hard lock. Appreciate you drawing out the identity angle; it's the part most MCP-memory writeups skip.