Declaration 8 of 12. Structural tier M (changes how the loop constrains
its own operation — a budget instrument and a gate floor); d4 = 3, no
override. Meta budget reads 0% of the trailing three, so this is in
budget without the ADR-0006 D2 repair exemption.
The SH-3 half is larger than CB-WP-0012 filed it as. "SH-3 has read
0.0% for six consecutive passes" is an artifact: --shape-budget measures
the window since the last commit, and it is read while writing the
evidence file, immediately after a commit, when that window holds one or
two responses. SH-1 and SH-2 are location statistics and survive n=2;
SH-3 is a rate, and at n=2 its only possible values are 0%, 50%, 100%.
Measured over real per-pass windows it is 1.1%-6.3%, not 0.0%. Which
exposes what the artifact hid: the pinned historical rate is 7.8%-8.6%,
so batching has got WORSE, and a metric stuck at a constant could not
have shown it.
That is the ninth recorded instance of the trusted-arithmetic class, and
the second one in this same metric — SessionShape.md §4 already records
"0 of 330 tool calls were batched" as the eighth.
Also owed: AM-4a counts proc-macro crates that never reach a binary
(89,048 lines, 36.2%). The task is explicit that the target must move
down with the instrument, or the pass must argue why 89,048 lines of
unearned headroom are legitimate.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
tegwick
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