Fix process entry struct, add demote logic, block protected processes, improve logging

README.md

@@ -1,9 +1,24 @@
 # autoPriority
 
-Automatically sets high CPU priority for processes exceeding a memory threshold.
+Monitors process memory usage on Windows and automatically adjusts CPU priority: promotes memory-heavy processes to HIGH and demotes everything else to NORMAL.
 
 **Windows only.**
 
+## How it works
+
+Every scan interval the program iterates over all running processes:
+
+| RSS vs threshold | Current priority | Action |
+|---|---|---|
+| ≥ threshold | anything except HIGH | → HIGH (logged as `PROMOTE`) |
+| ≥ threshold | already HIGH | skip |
+| < threshold | ABOVE_NORMAL, HIGH, or REALTIME | → NORMAL (logged as `DEMOTE`) |
+| < threshold | NORMAL, BELOW_NORMAL, or IDLE | skip |
+
+If `SetPriorityClass` fails for a process (e.g., anti-cheat protection), the process is added to an in-memory exclusion list and never touched again (logged as `BLOCK`). When the process exits, it is automatically removed from the list.
+
+On shutdown, all promoted processes are restored to NORMAL.
+
 ## Build
 
 Requires Go 1.26+.
@@ -38,7 +53,20 @@ autopriority -mem=1073741824 -interval=30s
 autopriority -dry-run
 ```
 
-Log is always written to `%TEMP%\autopriority.log`.
+## Log
+
+Log is always written to `%TEMP%\autopriority.log`. A new log file is created on each run (previous log is deleted).
+
+Log entries:
+
+| Prefix | Meaning |
+|---|---|
+| `PROMOTE` | Priority raised to HIGH |
+| `DEMOTE` | Priority lowered to NORMAL |
+| `BLOCK` | SetPriorityClass failed; process added to exclusion list |
+| `RESTORE` | Promoted process restored to NORMAL on shutdown |
+| `SKIP RESTORE` | PID reused by a different process; restore skipped |
+| `[DRY-RUN]` | Would change priority (dry-run mode) |
 
 ## Auto-start