release: v2.3.1 "Plumb Line" — measurement apparatus, and ten measured rejections - #348

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doublegate merged 20 commits into

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feat/v2.3.1-plumb-line

Aug 6, 2026

Commits on Aug 5, 2026

perf(tooling): add a harness-free frame-cost probe (v2.3.1 "Plumb Line")

doublegate
and
claude
committed
f468e76
perf(ci): make the relative frame-time gate refuse a verdict on a contended host
doublegate
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52cedcb
perf(tooling): per-subsystem frame breakdown — the symbol profile hides the APU
doublegate
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32fc007
docs(plan): v2.3.1 "Plumb Line" plan — measurement-first release record
doublegate
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a941eef
docs(plan): re-rank the v2.3.2 "Grain" items against the measured split
doublegate
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d937c0b
perf(ppu): re-measure the idle-line fast path — REJECTED again, stays default-OFF
doublegate
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69fb651
perf(tooling): add ab_check.sh — adjudicate one optimization at the >3% bar
doublegate
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e12a431
perf(ppu): reject the field-layout item — and fix the harness bug it exposed
doublegate
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9451e68
ci(pgo): probe for llvm-bolt by locating the binary, not by trusting apt
doublegate
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f7ad5af
perf(ppu): reject the dead-per-dot-derivation sink — LLVM already does it
doublegate
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05b8732
perf(ppu): reject items 8, 6 and 2 — all three have a ceiling of zero
doublegate
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84605a6
perf: reject the final four Grain items — ten measured, ten rejected
doublegate
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7c3956c

Commits on Aug 6, 2026