Summa MST Liability Aggregator

Given up to 16 (id, balance) leaf entries, deterministically builds a SHA-256 Merkle-sum-tree and emits the root commitment {hash, sum} plus every leaf's full inclusion proof. Applies Maxwell's (eprint 2022/043) mandatory range-check mitigation on the input side before building the tree. Pattern-borrowed from Summa (PSE)'s proof-of-reserves node layout, no code vendored. The generator counterpart to the MST inclusion checker (art-620) -- its proofs are consumable directly as that tool's input. Verify-only: commits to whatever balances it is given, never asserts they reflect real reserves.

Tool URL: https://ainumbers.co/chaingraph/art-621-summa-mst-liability-aggregator.html AP2/Policy Mandate export: yes