quicksheet-sysmon

QuickSheet extension — Live system monitoring on your desktop wallpaper.

See CPU usage, RAM, disk space, network I/O, load average, and top processes at a glance — always visible, zero distraction.

Installation

git clone https://github.com/cemheren/quicksheet-sysmon.git
cd quicksheet-sysmon
dotnet build

Register in your QuickSheet CSV by adding cells with the sys: prefix.

Cell Prefixes

Cell Value	Description
sys:	Summary — CPU%, RAM%, uptime, load
sys: cpu	Per-core CPU usage with visual bars
sys: ram	RAM breakdown (used, free, buffers, cached, swap)
sys: disk	Disk usage for all mounted filesystems
sys: net	Network interface stats (bytes RX/TX)
sys: load	Load average (1, 5, 15 min)
sys: uptime	System uptime and boot time
sys: procs	Top 10 processes by memory usage

Example CSV Layout

sys:,sys: cpu,sys: ram
sys: disk,sys: net,sys: load
sys: procs,,

Example Output

── System Monitor ──
CPU: 23.4%  RAM: 6842/16384 MB (41.8%)
Load: 1.23  0.98  0.76  Up: 14d 7h 32m

── CPU Usage ──
Total  [████████░░░░░░░░░░░░] 23.4%
CPU0   [██████░░░░░░░░░░░░░░] 18.2%
CPU1   [██████████░░░░░░░░░░] 31.7%
CPU2   [████░░░░░░░░░░░░░░░░] 12.1%
CPU3   [██████████████░░░░░░] 45.3%

Platform Support

Feature	Linux	Windows
CPU usage	✅ /proc/stat	⚠️ Basic (core count)
RAM	✅ /proc/meminfo	⚠️ Total only
Disk	✅ DriveInfo	✅ DriveInfo
Network	✅ /proc/net/dev	❌
Load average	✅ /proc/loadavg	❌
Uptime	✅ /proc/uptime	⚠️ TickCount64
Top processes	✅ Process API	✅ Process API

Full Linux support via /proc. Windows provides basic info via .NET APIs.

Requirements

• .NET 9 SDK
• QuickSheet (desktop mode)

How It Works

Uses the QuickSheet JSON-lines extension protocol:

1. QuickSheet spawns this process
2. Sends {"id": "...", "value": "cpu"} on stdin
3. Extension replies {"id": "...", "result": "..."} on stdout

Zero external dependencies — reads directly from /proc on Linux. No NuGet packages.

License

MIT