nx_glprobe_gate.nx

nx_glprobe_gate.nx -- THE REFEREE FOR THE GL-CONTEXT PROBE RULER (nx_glprobe_lib), 2026-09-02. IN-PROCESS over the lib, deliberately (a gate that forks a deployed .elf reports NOT-REACHED for every mutant). It proves: (1) the classifier separates its four states and is not a constant; (2) ONE TABLE, TWO SURFACES -- every native state name and remedy string is carried verbatim inside the emitted JS, so the page and the MCP caller cannot disagree; (3) the probe never claims a 2d context on the target canvas (the poisoned-canvas class); (4) the bare-refusal detector FIRES on a runtime-assembled bare refusal and stays silent on the diagnosed form (the neg-control pair); (5) every page emitter that acquires a WebGL2 context COMPOSES the probe and ships ZERO bare refusals -- emitter sources read from buildroot/runtime, an unreadable emitter degrades to a NAMED SKIP through gv_need, never a green. SCOPE: this does not run a browser; the served page's behaviour under a refusing browser is proven by the 2026-09-02 headless measurements recorded in the lib header, not by this gate. license_tier: ORIGINAL No hw writes (Rule 26). expect_exit: 0