Electron App Source Extractor

What it does

When your agent uses it

• Inspecting how a desktop Electron app, like a chat client or editor, was built
• Recovering readable source from a minified or bundled Electron app
• Looking inside an installed app's bundled JavaScript for learning or debugging

Example prompts

• “Extract the source code from this Electron app's asar bundle.”
• “Restore the original TypeScript source from this app's source maps.”
• “Show me how this desktop app's main process is structured.”

Requirements

• bun, or npx as a fallback, to run the extraction script

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

1. 1Prefer built-in user-input tools exposed by the current agent runtime — e.g., AskUserQuestion, request_user_input, clarify, ask_user, or…
2. 2Fallback: if no such tool exists, emit a numbered plain-text message and ask the user to reply with the chosen number/answer for each…
3. 3Batching: if the tool supports multiple questions per call, combine all applicable questions into a single call; if only single-question…

What it can do on your machine

Read from SKILL.md and the folder at commit 1567581. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships 2 files in scripts/ (TypeScript), which the agent can run.

  Shell commands in SKILL.md call:

  • npx

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md. Its commands use npx, which can reach the network depending on how they are called.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Electron App Source Extractor loads about 2.6k tokens when it runs. Until then it costs about 119 tokens; SKILL.md has 914 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~119

When it runs · the whole SKILL.md, loaded when a task matches

~2.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from JimLiu/baoyu-skills at commit 1567581, republished under its MIT licence (© JimLiu). 914 words, ~2,552 tokens.

name

baoyu-electron-extract

description

Extracts resources and JavaScript from any installed Electron app (`.asar` bundle), restoring original sources from `.js.map` files when available or formatting minified code with Prettier otherwise. Use when user wants to "extract Electron app", "decompile Electron", "get the source code of <app>", "inspect app.asar", "看 Electron 应用源码", "提取 .asar", or asks how a desktop Electron app is built. Skips `node_modules` and supports both macOS and Windows.

version

1.119.0

${BUN_X} {baseDir}/scripts/main.ts "<app>" [--output <dir>] [--asar <path>] [--force]

# Extract by app name (default output: ~/Downloads/Codex-electron-extract/)
${BUN_X} {baseDir}/scripts/main.ts Codex

# Extract by absolute path (works for .app bundles, install dirs, or .asar files)
${BUN_X} {baseDir}/scripts/main.ts "/Applications/Visual Studio Code.app"
${BUN_X} {baseDir}/scripts/main.ts "C:\Users\you\AppData\Local\Programs\codex"
${BUN_X} {baseDir}/scripts/main.ts --asar /Applications/Codex.app/Contents/Resources/app.asar Codex

# Custom output
${BUN_X} {baseDir}/scripts/main.ts Codex --output ~/work/codex-source

# Preview discovery without writing anything
${BUN_X} {baseDir}/scripts/main.ts Codex --dry-run

# Overwrite an existing output dir
${BUN_X} {baseDir}/scripts/main.ts Codex --force

# Machine-readable result (one JSON line on stdout)
${BUN_X} {baseDir}/scripts/main.ts Codex --json

~/Downloads/<AppName>-electron-extract/
├── extract-report.json          # JSON summary: counts, warnings, resolved paths
├── extracted/                   # raw asar contents (JS/CSS Prettier-formatted when no map)
│   └── ...                      # node_modules left untouched (skipped from format)
├── extracted.unpacked/          # copied from <asar>.unpacked/ if present
│   └── ...                      # native modules (.node), large assets
└── restored/                    # only present if at least one .js.map was usable
    └── <original/source/tree>   # rebuilt from sourcesContent in each .js.map

© JimLiu, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (scripts) in skills/baoyu-electron-extract of JimLiu/baoyu-skills.

• SKILL.md
• scripts/main.test.ts
• scripts/main.ts

Open the folder on GitHubat commit 1567581

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in JimLiu/baoyu-skills, which our catalogue first saw on October 7, 2026.

• guanyang/open-agent-hubskills/baoyu-electron-extract