fox 2026-05-21: characterize substrate-ON under BOTH answer shapes, so
answer_mode is a swept axis, not a single pinned value.
stock_v1.py now exposes STOCK_V1_POLICIES{quote,claim_lattice} +
STOCK_V1_GOVERNANCE_HASHES (quote 5b6ca4c5..., claim_lattice 036a4c79...),
policy_for(mode), and assert_not_drifted(mode). Shared pins (crosslang
OFF, repair OFF, quantifier dry-run, metacognition label-only,
soft-preflight OFF, claim cap 12, v2-acronym-aware) are frozen
identically across modes.
Wire the treatment arms to the pin (the consumer-side step that makes
the freeze real):
* control_ab --answer-mode {quote,claim_lattice}
* control_sweep --arborist-answer-mode {quote,claim_lattice}
Both default claim_lattice (prior behavior), call assert_not_drifted on
non-reasoning runs (halts the sweep if DEFAULT_QUERY_POLICY drifts), and
load the frozen policy_for(mode) instead of an inline
dict(DEFAULT_QUERY_POLICY, ...). Reasoning refs (phase 3) keep their
documented JSON overrides and skip the assert by design (different hash).
jaggedness is left standalone — it is a mode-agnostic retrieval
instrument, coupling it to the answer-policy freeze adds friction with no
correctness gain. Full suite 2528 passed.
russell@unturf.com
1a7f8eb4ea