Structure-graph round: the kill criterion fired, and it killed the retrieval arm

Both deterministic measurements ran before any model-side arm, as registered.
The resolver works (9,234 references detected, 2,428 resolved, 3.3% unresolved,
24/69 documents refused by the integrity gate) and its ceiling is provably the
skeleton's section inventory - maud docs with 97-111 sections resolve 96-97%,
docs with 13-33 resolve 24-40%.

But the edges do not point at gold. Against a contiguous same-budget control,
graph precision loses on contractnli (4.06 vs 5.06) and loses 6x on cuad (1.15
vs 6.99); maud is the only win at 1.6x, and reaches just 13.7% of its fragmented
gold. Same shape as the C1 coverage arms.

So retrieval-time edge following - argued in session as the cheapest and
strongest version of the idea - is DEAD on this bed and gets no arm. The weak
layers are retired on evidence: defined-term 0.12-1.29% and lexical 0.81-4.57%,
below the contiguous control everywhere. The surviving hypothesis is narrower:
the graph as a map a composer corrects, i.e. orientation rather than evidence,
to be registered and gated on its own terms.

Zero model calls spent reaching this.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01H9ToHYJVDxfeJcJwdzrP2H