#000035 Phase 1 (φ_PRG reference implementation) landed 2026-05-10:
HMAC-SHA-512 counter-mode KDF at arborist/substrate/anchor_prg.py,
20 tests, 10 KAT vectors, PHI_PRG_VERSION export.
§9.2 of the soft-hash analysis already recorded the design decision
("use HMAC-SHA-512(seed, digest ‖ counter)") but did not yet point
at the landed reference. This commit closes that gap by linking
§9.2 to the impl/tests/KAT artifacts and updating §11 status block
to reflect the new state — decision pinned + Phase 1 landed,
awaiting v7 plastic-training spec for the §9.10 amendment landing
(Phase 2, exogenous gate).
Doc-only update; no schema, no governance hash, no code change.
russell@unturf.com
0b038f1e36