Publish Chimera GFX source

docs/retroarch/phase-1.0bd-dormant-sdl-materializer-policy.md

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+# Phase 1.0BD: dormant exact SDL materializer policy
+
+Status: `REMOTE_BOUND_POLICY_COMPLETE_ADAPTER_SOURCE_ONLY`
+
+Date: 2026-07-29
+
+RetroArch commit `c003c503ff0b747bd161c75ad7329a62d3880da0` adds a pure
+policy for the missing SDL archive. It accepts only the BC-bound SDL commit,
+diagnostic patch and SDK file hashes, requires clean and absent output state,
+and returns one immutable Ninja/Release/SDL2-static plan affecting exactly the
+three reviewed PS5 SDL files.
+
+The module has no process, network, clock, filesystem adapter or CLI. It cannot
+materialize or compile anything, and its plan excludes both RetroArch building
+and device actions. Static validation, identity mutations, prerequisite
+mutations and the complete existing host matrix pass.
+
+The next phase may implement an injected host adapter and fake-adapter tests.
+It may not yet invoke CMake/Ninja, build SDL or RetroArch, or act on a PS5.