Add pc-gaming skill for hardware specs and graphics settings advice

skills/pc-gaming/SKILL.md

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+---
+name: pc-gaming
+description: Recommend optimal graphics settings for PC games based on user's hardware specs. Use when the user asks about game settings, FPS expectations, ray tracing feasibility, resolution choices, or whether their PC can run a specific game well. Also covers driver info (Mesa/RADV) and Linux gaming specifics.
+---
+
+# PC Gaming Settings Advisor
+
+## Hardware Profile
+
+Read `references/hardware.md` for the user's current PC specs before making recommendations.
+
+## How to Recommend Settings
+
+1. Read `references/hardware.md` for specs
+2. Search web for recent benchmarks of the specific game + GPU combo
+3. Consider: resolution, RT capability, upscaling (FSR/DLSS), VRAM limits, CPU bottlenecks
+4. Give concrete settings (not vague "medium/high") when possible
+5. Note Linux-specific issues if applicable (shader compilation, Mesa version, Proton/Wine)
+
+## Key Principles
+
+- 7900 XTX = excellent rasterization, weaker RT than NVIDIA equivalents
+- FSR Quality from 1440p → 4K is the sweet spot for RT games
+- Native 4K without RT often looks better than lower res + RT (except path-traced games like Cyberpunk RT Overdrive)
+- Always check VRAM usage at 4K (24GB is generous but some games push it)
+- Mesa/RADV updates matter significantly for Linux — check version
+
+## Known Game Settings
+
+Read `references/game-settings.md` for previously researched optimal settings per game. Update this file when new games are researched.

skills/pc-gaming/references/game-settings.md

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+# Optimal Game Settings (RX 7900 XTX @ 4K)
+
+## Cyberpunk 2077
+- **Recommended:** 1440p internal + RT Overdrive + FSR Quality (output 4K)
+- **Why:** Path tracing transforms the game visually. Native 4K without RT looks flat by comparison.
+- **Expected FPS:** ~40-50 with FSR Quality
+- **Alternative:** Native 4K, RT off, Ultra preset → 60+ FPS (but less impressive lighting)
+
+## Hogwarts Legacy
+- **Recommended:** Native 4K, RT off, Ultra settings
+- **Why:** RT only adds subtle reflections/shadows — not worth the FPS cost. Native 4K clarity wins.
+- **Expected FPS:** 60+ without RT
+- **With RT:** ~35-45 FPS at 4K (not smooth enough)
+
+---
+*Add new games as they're researched. Include source/benchmark date.*
+*Last updated: 2026-02-26*

skills/pc-gaming/references/hardware.md

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+# PC Hardware Specs
+
+## GPU
+- **Model:** AMD Radeon RX 7900 XTX
+- **VRAM:** 24 GB GDDR6
+- **Architecture:** RDNA 3
+- **RT Performance:** Good for light RT, struggles with heavy RT (path tracing) at 4K
+- **Upscaling:** FSR 3.x (frame gen + spatial)
+
+## Display
+- **Resolution:** 4K (3840x2160)
+- **Refresh Rate:** TODO
+- **FreeSync:** TODO
+- **HDR:** TODO
+
+## CPU
+- **Model:** TODO
+- **Cores/Threads:** TODO
+
+## RAM
+- **Size:** TODO
+- **Speed:** TODO
+
+## Storage
+- **Type:** TODO (SSD?)
+
+## OS / Driver
+- **OS:** TODO (Linux distro?)
+- **Mesa Version:** Mesa 26.0 (as of Feb 2026)
+- **Proton:** TODO
+
+## Gaming Device
+- **Handheld:** GPD Win 4 (separate device, for portable gaming)
+- **Desktop:** Main gaming PC (specs above)
+
+---
+*Last updated: 2026-02-26*