223cfb97c3
README: purpose-first (possibility not boolean, caller owns evidence/time), install, verified quick start, concepts (result shape, overlays, temporal context), API table, development commands, design notes. benchmark: scripts/benchmark.js on @tenere/benchmark-lib — eight contours (direct/union/denied/meta/overlay/binary checks, snapshot build/restore), committed .rigor-baseline.json, exit 1 on high-severity regressions. CI: benchmark job compares on push (continue-on-error), re-saves baseline and uploads it as an artifact on tags; publish now depends on benchmark passing as well as test.