The gating work before G-minor can be contracted. Deliverable is one file,
spec/AUDIT_GMINOR_VOCABULARIES.md, holding a reachability matrix keyed
chunk role -> encoded payload type -> discriminant vocabulary ->
post-baseline variants -> introduction event -> derivation site.
Method is pinned to walking the encoder rather than the type, because a field
can exist and never reach the wire -- ScoreTuningContext::accidental_extensions
is the standing proof -- and the matrix's purpose is to say what is emitted.
Inclusions cover nested additive variants at any depth and, the sharpest edge,
later native additions to enums that also carry a Registered escape: the escape
is out of scope while a new native variant on the same enum is not, and
binary_format names fifteen such carriers. ChunkKind is excluded as closed.
The trap most likely to corrupt the matrix: the spec's "append at >= N"
phrasing names the next free slot, not the baseline boundary. OperationPayload
is documented as appending at >= 4 while discriminant 3 is itself an append,
and OperationKind at >= 30 while 24-29 were appends too. Post-baseline
membership must come from revision history, not from those numbers.
Epoch numbers are explicitly not ratified here; column 5 records the
introduction event. Completeness is enforced by requiring a per-role
accounting including roles that produce no rows, and negative results recorded
for every escape-carrying enum -- an unlisted role being indistinguishable
from an overlooked one.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QjsEnYhm1gPpf6ii2iFxFV
Levi Neuwirth
6145efecd9