course-to-appimage

49 / 100 · High risk

Only if you trust the author. Some of what it can do is expected: a coding skill usually runs build and test commands.

By sebastianhaba/book-to-course-skill (GitHub) · coding · 77 stars · scanned at commit f8a6946

Package an existing interactive course generated by the book-to-course skill (a folder with index.html, assets/ and course/data.js, or its .zip) into a self-contained Linux AppImage — one file that carries its own WebView engine (Electron), so it runs on any desktop distro without installing anything, keeps progress in a file and can run code exercises' tests. Checks the build tools on the machine (appimagetool, Electron, AppImage runtime), tells the user exactly what is missing and where to ge…

Works with any agent that supports SKILL.md skills.

What this skill can do

Runs commands on your computer

This is disclosed by the author in the skill's SKILL.md or README. Expected for a coding skill.

Found in 11 places.

course-to-appimage/SKILL.md, line 43python3 scripts/toolchain.py
course-to-appimage/SKILL.md, line 72python3 scripts/build_appimage.py "<COURSE_DIR>"
course-to-appimage/assets/app/main.js, line 16const { spawn } = require('child_process');

Show 8 more

course-to-appimage/scripts/build_appimage.py, line 182subprocess.run(["update-desktop-database", "-q", os.path.join(DATA_HOME, "applications")], capture_output=True)
course-to-appimage/scripts/build_appimage.py, line 316r = subprocess.run(cmd, env=env, capture_output=True, text=True)
course-to-appimage/scripts/build_appimage.py, line 328s = subprocess.run([appimage, "--paths"], capture_output=True, text=True, timeout=90, env=env)
course-to-appimage/scripts/build_appimage.py, line 331except (OSError, subprocess.SubprocessError) as e:
course-to-appimage/scripts/toolchain.py, line 58out = subprocess.run(["xdg-user-dir", "DOWNLOAD"], capture_output=True, text=True, timeout=5).stdout.strip()
course-to-appimage/scripts/toolchain.py, line 61except (OSError, subprocess.SubprocessError):
course-to-appimage/scripts/toolchain.py, line 84r = subprocess.run([path, "--version"], capture_output=True, text=True, timeout=60, env=tool_env())
course-to-appimage/scripts/toolchain.py, line 85except (OSError, subprocess.SubprocessError) as e:

Connects to the internet

This is disclosed by the author in the skill's SKILL.md or README.

Found in 4 places.

course-to-appimage/assets/app/main.js, line 150b.onclick = () => fetch('api/open-exercise', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ dir: m[1] }) });
course-to-appimage/scripts/setup_toolchain.py, line 25import urllib.request
course-to-appimage/scripts/setup_toolchain.py, line 37with urllib.request.urlopen(urllib.request.Request(url, headers=UA), timeout=60) as r:

Show 1 more

course-to-appimage/scripts/setup_toolchain.py, line 79with urllib.request.urlopen(urllib.request.Request(item["url"], headers={"User-Agent": UA["User-Agent"]}),

Downloads and installs other software

The author does not mention this.

Found in 3 places.

course-to-appimage/references/troubleshooting.md, line 40desktop. Install the desktop basics, e.g. Debian/Ubuntu `sudo apt install libgtk-3-0 libnss3 libasound2 libgbm1`.
course-to-appimage/scripts/toolchain.py, line 272lines.append(" package: Arch/CachyOS `sudo pacman -S noto-fonts-emoji` · Debian/Ubuntu `sudo apt install fonts-noto-color-emoji`"
course-to-appimage/scripts/toolchain.py, line 273" · Fedora `sudo dnf install google-noto-color-emoji-fonts`")

Changes files outside its own folder

The author does not mention this.

Found in 1 place.

course-to-appimage/scripts/build_appimage.py, line 12--install also copy the AppImage to ~/Applications and add it to the application menu (no sudo)

Reads your saved credentials, such as SSH keys or .env files

The author does not mention this.

Found in 2 places.

course-to-appimage/scripts/build_appimage.py, line 324env = dict(os.environ)
course-to-appimage/scripts/toolchain.py, line 72env = dict(os.environ)

Safer alternatives

Low-risk skills in the same category (coding) that look related. Check that one does what you need.

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'course-to-appimage' ] || [ -L ~/.agents/skills/'course-to-appimage' ]; then echo 'A skill folder named course-to-appimage already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/sebastianhaba/book-to-course-skill' "$d" && git -C "$d" checkout --quiet 'f8a6946335aaca44ae55052ee04bacfad2442940' -- 'course-to-appimage' && mkdir -p ~/.agents/skills && cp -R "$d"/'course-to-appimage' ~/.agents/skills/'course-to-appimage' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'course-to-appimage' ~/.claude/skills/'course-to-appimage' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-07	`f8a6946`	49