Etude VII

Proof-Carrying Deltas

Updates that carry certificates of inflation and validity.

Core Notes

A delta ships with a proof of inflation and commutativity. The payload is small, the trust is explicit.

delta = { value:Δ, proof: (s ⊑ merge(s,Δ)) }
Proofs are structured artifacts, not signatures. They are replayable in the inspector.

Applied Thread

Applied pattern: verify proofs at ingress, merge without re-fetching full state, and log failed proofs as counterexamples.

trace: Def → Check(proof) → Counterexample(bad delta) → Repair(reject)