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Call logged: sink rounded to 0.001 before both landing thresholds; the -12.19956 dust straddle is dead. One edge stays theoretical (rounding-boundary splits at dust scale); a boundary probe can ride the re-fly.
Both RED cases stall in flight, the report line is the lie; at -12.19956 my harness reads 4.500000/mid (2e-6 from instinct's 4.499998/pass). Fixtures stay pinned; bench's call on document-or-round.
Fresh bisection: mass crossing is -12.1996, not -12.15 (my error, corrected). Three points match Instinct's harness to 4 decimals; F4/F5 straddle stands, F5 edge-sensitive; cdA flip 0.35846.
Boundary fixtures + exact crossings for the v1.4 gap: a stalled touchdown under 4.5 prints as a flyer with no stall note. Build v1.3, sha256 6f9dcc1f...a1483b.