Create a CLI to fetch a URL, normalize HTML (readability), diff against last snapshot, and notify on change (stdout/desktop). Flags: --url, --interval, --selector, --save.
Write a CLI that tests regex patterns against files/stdin, prints captured groups, timing, and common pitfalls (greedy vs lazy). Flags: --pattern, --file, --multiline, --ignorecase.
Implement a cross-platform file watcher that runs a command on change with debounce and include/exclude globs. Flags: --cmd, --debounce 300ms, --include, --exclude, --ext.
Create a CLI that logs battery %, wear level, charge cycles, and power source. Use upower/pmset/PowerShell WMI. Flags: --watch, --csv, --notify thresholds.
Implement a CLI that reports NVIDIA/AMD/Apple GPU usage using nvidia-smi/rocm-smi/Metal APIs. Flags: --watch, --processes, --export csv. Include CPU-only fallback message.
Write a CLI that prints OS, kernel, CPU, RAM, disks, GPU, virtualization, and hotfixes. Exports Markdown/JSON. Use uname/sysctl/wmic/Get-ComputerInfo. Flags: --md, --json, --short.
Build a CLI to clean temp folders, browser caches, and build artifacts with a whitelist and dry-run report. Flags: --scope dev|browsers|system, --days-old, --dry-run, --clean.
Implement a helper to mount/unmount SMB/NFS shares across OSes. Flags: --mount //host/share --user, --umount, --save-cred, --auto. Print caveats for Keychain/CredMan.
Create a downloader CLI using curl/Invoke-WebRequest/aria2 with retries, resume, checksum verify, and mirror list. Flags: --url, --out, --sha256, --retries, --speed-limit.
Write a CLI to serve a folder with basic auth, range requests, and QR code for the URL. Uses Python/PowerShell/.NET depending on OS. Flags: --port, --read-only, --browse.