/proc, pkexec, and 678 commits

Short summary

The author dissects Stacer, an abandoned Linux system optimizer, to learn real Qt application architecture—beyond toy calculator tutorials. The codebase cleanly separates OS-interfacing logic (stacer-core, a static lib with no GUI) from the presentation layer, organized by verb: Info, Tools, Utils. A key insight is that Linux system monitoring is essentially regex over /proc text files, and CPU usage isn't a readable value but a computed delta between two samples of cumulative tick counters.

• •Stacer's architecture cleanly separates OS logic from GUI via a static core library with no widget dependencies
• •Linux system monitoring is fundamentally parsing /proc text files with regex
• •CPU usage is derived from deltas of cumulative tick counters in /proc/stat, not a directly readable value

Generated with AI, which can make mistakes.