chimera-gfx-Public/adapters/retroarch

RetroArch adapter boundary

The compiled scaffold exposes a dependency-free query contract. It reports RGUI and SDL software fallback as the intended integration path, but reports software-frame binding not yet implemented and hardware contexts unavailable. Every hardware-context request returns SAFETY_POLICY.

The future driver lifecycle is: initialize a chimera_gfx_context, create one surface, create/reuse textures for software core frames, upload a frame, present through the selected backend, then destroy texture, surface, and context in that order. No RetroArch private type or header enters the public library API.