Initial commit: Teams keep-active tool for Linux (X11) and Windows

Cross-platform anti-idle utility that keeps Microsoft Teams showing
Available by resetting the OS idle timer with an invisible input signal.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

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+# teamsTrick
+
+Keep Microsoft Teams (and any presence system driven by OS idle time) showing
+**Available** while you're reading, watching a video, on a call, or otherwise not
+touching the keyboard. Teams flips you to *Away* after roughly 5 minutes of no
+input; these scripts reset the OS idle timer with a brief, invisible signal so
+that never happens.
+
+No third-party packages — each script uses only the standard OS APIs via Python's
+`ctypes`.
+
+## Scripts
+
+| Script | Platform | Method |
+| --- | --- | --- |
+| `stay_active.py` | Linux (X11) | 1px mouse nudge (or key tap) via the X11 XTest extension |
+| `stay_active_win.py` | Windows | Invisible F15 key tap (or mouse nudge) via the Win32 `SendInput` API |
+
+## Requirements
+
+- Python 3
+- **Linux:** an **X11** session (`echo $XDG_SESSION_TYPE` → `x11`) and the
+  `libX11` / `libXtst` system libraries (present on essentially every desktop).
+  Wayland is not supported — XTest does not reset the idle timer there.
+- **Windows:** nothing beyond Python. If `python` isn't on your PATH, use `py`.
+
+Run the script from **inside your desktop session** (not over SSH) so it can talk
+to the display / input system.
+
+## Usage
+
+### Linux
+
+```bash
+./stay_active.py                 # default: invisible 1px mouse nudge every 120s
+./stay_active.py -i 90           # nudge every 90s
+./stay_active.py -m key -k shift # tap Shift instead of moving the mouse
+./stay_active.py -q &            # quiet, run in the background
+```
+
+### Windows
+
+```
+python stay_active_win.py                 # default: invisible F15 tap every 120s
+python stay_active_win.py -i 90           # every 90s
+python stay_active_win.py -m mouse        # 1px mouse nudge instead
+python stay_active_win.py --no-sleep      # also keep the PC/display awake
+python stay_active_win.py -q              # quiet, good for background
+```
+
+Stop either script with **Ctrl+C**.
+
+## Options
+
+| Flag | Description |
+| --- | --- |
+| `-i`, `--interval` | Seconds between signals (default `120`). Keep it under Teams' ~300s Away threshold. |
+| `-m`, `--method` | `mouse` or `key`. Default is `mouse` on Linux, `key` on Windows. |
+| `-k`, `--key` | Which key to tap in key mode (Linux: `f13`–`f15`, `shift`). |
+| `--no-sleep` | *(Windows only)* Also prevent the system and display from sleeping. |
+| `-q`, `--quiet` | Suppress the heartbeat output. |
+
+## Notes & caveats
+
+- It only prevents the **idle → Away** transition. It does **not** override a
+  status you set manually (e.g. *Do Not Disturb*).
+- It won't help if the machine **sleeps** — a sleeping PC goes offline regardless.
+  On Windows use `--no-sleep`; on Linux disable screen lock / suspend if you need
+  to stay green while away for a long time.
+- The signals are designed to be invisible: the mouse nudge returns the cursor to
+  where it started, and F15 / the chosen keys aren't bound to anything on a normal
+  desktop.