docs: README as the product page; AGENTS.md for AI coding agents

The README now introduces the finished app: hero screenshot, download
first, requirements, profiles, how the search works (with a diagram),
the command line as a table and an FAQ. Developer material moved to
docs/development.md. The agent instructions moved from CLAUDE.md to
AGENTS.md, which most coding agents read; CLAUDE.md imports it.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Author: Rovey

AGENTS.md

@@ -0,0 +1,42 @@
+# GPU Auto Optimizer
+
+Instructions for AI coding agents working in this repository. A native C++20 Windows tool that tunes
+NVIDIA GPUs (power limit, core and memory offsets) through NVML and NVAPI, with a DX11 stress test.
+User-facing overview: `README.md`. Code layout, profiles and release process: `docs/development.md`.
+
+## Hard requirement: English only
+
+Everything in this repository is in English, without exception: code, identifiers, comments,
+CLI output and log lines, commit messages, branch names, PR titles and descriptions, specs,
+plans, README, `docs/`, test names and file names. This holds even when the conversation with
+the user is in another language — translate, never paste non-English text into the project.
+
+## Build and test
+
+`cmake` is not on `PATH`; use the one bundled with Visual Studio:
+
+```powershell
+$bin = "C:\Program Files\Microsoft Visual Studio\18\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin"
+& "$bin\cmake.exe" --workflow --preset ci          # configure, build Release, test
+& "$bin\cmake.exe" --build --preset debug; & "$bin\ctest.exe" --preset debug
+```
+
+Everything we compile is `/W4 /WX`; fix warnings, do not suppress them.
+
+## Layout
+
+Two executables on one engine: `gao.exe` (CLI, `src/app/main.cpp`) and
+`GpuAutoOptimizer.exe` (window + tray + watchdog, `src/app/gui/`). Logic both
+need lives in `src/app/common.*`, never in either entry point.
+
+## Rules the design depends on
+
+- `src/core/` is pure logic: no `windows.h`, NVML, NVAPI or D3D headers. It reaches hardware
+  only through `GpuControl` and callbacks, so CI tests it without a GPU.
+- Every hardware write is verified by reading it back; a mismatch is a failure. Any failed
+  apply ends at stock.
+- The crash journal's `begin` line is flushed to disk before a clock candidate touches the
+  hardware.
+- `src/hw/` is verified by hand on the reference RTX 4070 via `docs/hardware-checks.md`; record
+  the results there.
+- Commands that write to the GPU need an elevated shell.

CLAUDE.md

@@ -1,38 +1 @@
-# GPU Auto Optimizer
-
-## Hard requirement: English only
-
-Everything in this repository is in English, without exception: code, identifiers, comments,
-CLI output and log lines, commit messages, branch names, PR titles and descriptions, specs,
-plans, README, `docs/`, test names and file names. This holds even when the conversation with
-the user is in another language — translate, never paste non-English text into the project.
-
-## Build and test
-
-`cmake` is not on `PATH`; use the one bundled with Visual Studio:
-
-```powershell
-$bin = "C:\Program Files\Microsoft Visual Studio\18\Community\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin"
-& "$bin\cmake.exe" --workflow --preset ci          # configure, build Release, test
-& "$bin\cmake.exe" --build --preset debug; & "$bin\ctest.exe" --preset debug
-```
-
-Everything we compile is `/W4 /WX`; fix warnings, do not suppress them.
-
-## Layout
-
-Two executables on one engine: `gao.exe` (CLI, `src/app/main.cpp`) and
-`GpuAutoOptimizer.exe` (window + tray + watchdog, `src/app/gui/`). Logic both
-need lives in `src/app/common.*`, never in either entry point.
-
-## Rules the design depends on
-
-- `src/core/` is pure logic: no `windows.h`, NVML, NVAPI or D3D headers. It reaches hardware
-  only through `GpuControl` and callbacks, so CI tests it without a GPU.
-- Every hardware write is verified by reading it back; a mismatch is a failure. Any failed
-  apply ends at stock.
-- The crash journal's `begin` line is flushed to disk before a clock candidate touches the
-  hardware.
-- `src/hw/` is verified by hand on the reference RTX 4070 via `docs/hardware-checks.md`; record
-  the results there.
-- Commands that write to the GPU need an elevated shell.
+@AGENTS.md