Two documents, both prerequisites rather than implementations.
CONTRACT_EDITOR_T4PRE_IR.md charters the layout-IR readiness tranche Ruling A
names as its prerequisite: per-system primitive ownership (W1), the shared
typed glyph-asset seam (W2, contracted but not dispatched), and the text-run
primitive decision (W3, an analysis packet). Its central finding reframes the
work — casting-off already computes the ownership partition and the fold into
ResolvedLayoutIR drops it on the floor, so W1 is "stop discarding it", exact
rather than heuristic. Eight design pins, six named mutations, and a
byte-neutrality gate that keeps the tranche compatible with the Push-4b
freeze.
The contract survived a source-level review that found one real defect: the
blast radius audited ResolvedLayoutIR literals but not ResolvedSystem's, and
pin 1 adds a field to both — editor-core's two-system hit-test fixture is a
full literal with no spread, so the packet could not compile the workspace
without it. Amended, along with the SystemId claim (no *production*
constructor; testkit's random cache generator has one), the stub solver's
total provenance aliasing, and the stroke-continuation citation.
ANALYSIS_GENESIS_PERSISTENCE.md is the field-by-field Score table Ruling B
blocker (i) requires before it can be resolved. It decides nothing; it
establishes what is true. Eight of Score's twenty fields have no operation
that can produce them — canvas.layout_defaults (the printed page geometry),
instruments, staff_groups, parts, tuning_context, spelling_precedence,
analysis_layers, views, plus identity — and decomposition_attachments can be
pruned but never authored. Each is reachable only through a base the reducer
is handed, and pruning is licensed to replace that base with a
MaterializedState carrying none of them.
Three findings follow: the genesis root is unreachable from an empty base
(CreateStaff preconditions a live instrument; nothing creates an instrument),
the canonical base cannot carry what the base-only fields hold, and there is
no canonical wire path from bundle bytes to a Score at all. They are one
problem from three sides — the format has no representation for graph state
that no operation authors.
Four dispositions are laid out with costs: a canonical genesis block, closing
the op-coverage gap, promoting the canonical base to carry graph values, or
scope-limiting T1b. The recommendation is the last now and the third as the
destination, because only that one makes pruning safe for every field rather
than for an enumerated list, and T4b needs the same checkpoint mechanism
regardless.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Levi Neuwirth
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