Publish Chimera GFX source

docs/retroarch/phase-1.0ch-native-wsl-sdl-materializer-one-shot-gate.md

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+# Phase 1.0CH: native WSL SDL materializer one-shot gate
+
+Status: `NATIVE_WSL_REQUEST_GRAPH_BOUND_ONE_MATERIALIZATION_ALLOWED`
+
+Date: 2026-07-30
+
+The CG-authorized native request graph is committed, pushed and hash-bound.
+Host tests, validators and WSL import checks pass; the exact native root is
+absent. CH permits one offline invocation that may create only that native root,
+materialize the patched SDL worktree and build `libSDL2.a` there. Archive export,
+RetroArch target build, network and PS5 actions remain unauthorized.