Imported from Souperman9/renovk-old (src/shaders/AGENTS.md). Install upstream with npx skills add Souperman9/renovk-old --skill shaders. Copyright stays with the author.

AGENTS: shared HLSL shaders

Scope: shared HLSL files in src/shaders/.

Design rules

• Treat these files as shared shader library code used by multiple mods.
• Preserve existing function behavior and signatures unless the user explicitly asks for a migration.
• Avoid changes that increase register pressure or instruction count without a clear benefit.

HLSL readability

• Follow the root HLSL readability rules instead of restating them here.
• Shared shader helpers must preserve existing signatures and be justified by reuse, a stable shader concept, or real complexity.

Verification

• Build the smallest relevant game target that consumes the changed shader code.
• If a change affects visual output, document the expected runtime visual difference.