course-to-apk

59 / 100 · Review before installing

Check before installing. 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 signed Android APK — a light offline WebView app to install on a phone or tablet. Checks the build tools on the machine (JDK, Android SDK build-tools and platform), tells the user exactly what is missing and where to get it, and can download it for them. Use this whenever the user wants a course "na telefon/tablet", "na Androida", "jako aplikacj…

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 6 places.

course-to-apk/SKILL.md, line 35python3 scripts/toolchain.py
course-to-apk/SKILL.md, line 60python3 scripts/build_apk.py "<COURSE_DIR>"
course-to-apk/scripts/build_apk.py, line 53r = subprocess.run(cmd, env=env, capture_output=True, text=True)

Show 3 more

course-to-apk/scripts/build_apk.py, line 137r = subprocess.run([adb, "-s", devs[0], "install", "-r", apk], env=env, capture_output=True, text=True)
course-to-apk/scripts/toolchain.py, line 57out = subprocess.run([os.path.join(java_home, "bin", exe("javac")), "-version"],
course-to-apk/scripts/toolchain.py, line 62except (OSError, subprocess.SubprocessError):

Connects to the internet

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

Found in 8 places.

course-to-apk/scripts/setup_toolchain.py, line 30import urllib.request
course-to-apk/scripts/setup_toolchain.py, line 43def fetch(url):
course-to-apk/scripts/setup_toolchain.py, line 44with urllib.request.urlopen(urllib.request.Request(url, headers=UA), timeout=60) as r:

Show 5 more

course-to-apk/scripts/setup_toolchain.py, line 62data = json.loads(fetch(url))
course-to-apk/scripts/setup_toolchain.py, line 75root = ET.fromstring(fetch(REPO_XML))
course-to-apk/scripts/setup_toolchain.py, line 127req = urllib.request.Request(item["url"], headers=UA)
course-to-apk/scripts/setup_toolchain.py, line 129with urllib.request.urlopen(req, timeout=120) as r, open(dest, "wb") as f:
course-to-apk/scripts/setup_toolchain.py, line 229root = ET.fromstring(fetch(REPO_XML))

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

The author does not mention this.

Found in 1 place.

course-to-apk/scripts/toolchain.py, line 217env = dict(os.environ)

Downloads and installs other software

The author does not mention this.

Found in 3 places.

course-to-apk/scripts/toolchain.py, line 236lines.append(" or package manager: Arch/CachyOS `sudo pacman -S jdk21-openjdk` · Debian/Ubuntu `sudo apt install openjdk-21-jdk-headless`"
course-to-apk/scripts/toolchain.py, line 237" · Fedora `sudo dnf install java-21-openjdk-devel`")
course-to-apk/scripts/toolchain.py, line 239lines.append(" or Homebrew: `brew install --cask temurin@21`")

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-apk' ] || [ -L ~/.agents/skills/'course-to-apk' ]; then echo 'A skill folder named course-to-apk 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 "$d" checkout --quiet 'f8a6946335aaca44ae55052ee04bacfad2442940' -- 'course-to-apk' && mkdir -p ~/.agents/skills && cp -R "$d"/'course-to-apk' ~/.agents/skills/'course-to-apk' && 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-apk' ~/.claude/skills/'course-to-apk' (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`	59