caught me repeating C1
specs/RetrospectiveAnalysis.md v1.0 plus games/ground/benches/search.rs,
which exists because ADR-0013 D7 refused to let the spec quote either
disputed figure.
THE BENCHMARK'S OWN FIRST FIXTURE WAS DEFECTIVE, and it is the same defect
class the review caught one layer up. Stopping at a fixed step 20 put 2p
and 4p in states where seat 0 had NO legal commands, so it timed an empty
Vec (~120 ns) and silently skipped validate_fold because there was nothing
to validate. It now advances until the seat has a real branch and ASSERTS
it. A clone benchmark was added too: a search must copy state per branch,
and iter_batched excludes setup from timing, so without it the budget
would again rest on an unmeasured span.
Measured at real decision points: legal_commands 4.06-4.76 us, clone
378-639 ns, validate+fold 0.5-3.8 us. Per-child cost is NOT uniform --
some commands resolve cascades -- so budgets use the upper end (~5
us/child).
That settles D3 with real numbers. Joint branching over the last two
rounds is ~5x10^2 / 1.6x10^5 / 5.7x10^5 at 2/3/4 seats, so K=2 costs
negligible / 0.8 s / 2.9 s and holds at two to four seats. It does NOT
hold at five or six, where the tool must reduce K and say that it did
rather than silently searching less.
§4.1 is a normative prohibition, not a preference: a single policy's win
rate MAY NOT be reported as a difficulty. The spec carries the measured
reason -- greedy 100% against first-legal 0% on identical deals -- because
this project already made that error and nearly exported it to a repo that
is blocked waiting on the number.
§2.3 makes the empty-result wording normative: "no winning line found in
the last K rounds", never "unwinnable". A bounded search cannot establish
unwinnability and that sentence is what a player who just lost reads.
Also corrected: the T01 completion record still asserted all three
withdrawn claims as fact. It now carries claimed / withdrawn / survives
explicitly rather than being rewritten -- a retraction that does not
propagate to every place the claim lives is how the earlier ones survived.
make all: exit 0. loop-lint clean.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
tegwick
b27aa14df0