rewrite: single file, zero deps, Windows API, logging, CLI flags

README.md

@@ -1,3 +1,38 @@
 # autoPriority
 
-A program that automatically sets a high priority for game processes
+Automatically sets high CPU priority for memory-heavy processes.
+
+## Build
+
+```
+# Standard build (with console window)
+go build -o autopriority.exe .
+
+# Background build (no console, minimal size)
+go build -ldflags="-H windowsgui -s -w" -o autopriority.exe .
+```
+
+## Usage
+
+```
+autopriority [flags]
+```
+
+| Flag        | Default       | Description                      |
+|-------------|---------------|----------------------------------|
+| `-mem`      | 536870912     | Memory threshold in bytes        |
+| `-interval` | 1m0s          | Scan interval (min 10s)          |
+| `-dry-run`  | false         | Log only, don't change priority  |
+| `-log`      | true          | Write `autopriority.log` file    |
+
+## Auto-start
+
+Place a shortcut to `autopriority.exe` in:
+
+```
+shell:startup
+```
+
+## Dependencies
+
+None. Uses only Windows API (kernel32, psapi) via raw syscall.