PolySAT

polynomial sat solver — 10 techniques + uniform walk — zero dependencies

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The P / NP / P Sandwich

P-Left
NP Strip
P-Right
P-Left — low clause/variable ratio — under-constrained, BCP + pure literals solve it
NP Strip — phase transition (~4.267 for 3-SAT) — isomorphism + rephrase + uniform walk
P-Right — high ratio — over-constrained, probe + eliminate prove UNSAT fast

11 polynomial techniques chain until fixpoint. The isomorphic transform learns implied clauses.
Rephrase substitutes complex clauses with shorter equivalents, then uniformizes to k-SAT for the walk.