All five findings verified against the tree; the recommended policy is
rejected and replaced with the ratified one.
Policy (b), minor = highest discriminant emitted, cannot represent an
operation block. An envelope also emits the outer OperationPayload
discriminant, and ResolveEquivocation is appended at 3 while carrying no
OperationKind at all -- so the ambiguity is inside one role and one block, not
between roles. Generalizing to "highest from any vocabulary" is worse: an old
kind 23 would numerically mask a new payload 3. binary_format itself enumerates
four independent minor-additive vocabularies. The rung's gating work is
therefore an audit of every append-only discriminant reachable from each
affected payload, which the first draft never scoped.
Ratified instead: a global additive epoch with content-minimal stamping, an
envelope's minor being the max across outer payload, primitive kind, and every
nested additive variant actually emitted. The maintenance objection is
answered by co-locating introduced_minor with each discriminant in an
exhaustive match with no wildcard, so an unassigned variant cannot compile --
the operation_kind_tag_vocabulary! reasoning. Per-major counters are rejected
too: mixed blocks do not compose after max_major.
Two of my conclusions were wrong. Op-block minors do not reach the text
projection -- block schemas are discarded there, and all seven accepted-corpus
schema forms belong to extension chunks or canonical bases -- so no companion
bump. I had also miscounted them as six by grepping lines rather than
occurrences. And the manifest-ID promise is not threatened: it is conditional
on the same manifest body, and a changed ChunkRef is a different body. Real
address churn, not a broken guarantee.
"Is the canonical base exempt" was the wrong binary question. It never emits
the op-kind discriminant, so it holds its minor until MaterializedState's own
bytes emit a later-added variant. Manifest::SCHEMA stays put; existing bundles
need no migration. Construction-site count corrected 62 -> 66.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QjsEnYhm1gPpf6ii2iFxFV
Levi Neuwirth
82ac636982