Frappe Ops Frontend Build

What it does

When your agent uses it

• Configuring frontend asset bundling
• Migrating from build.json (v1
• Troubleshooting SCSS/CSS compilation

Example prompts

• “/frappe-ops-frontend-build”

Requirements

• Python 3
• Compatibility (from SKILL.md): Claude Code, Claude.ai Projects, Claude API. Frappe v14-v16.

Workflow steps

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

1. 1bench build scans each app's public/ directory recursively
2. 2Files matching *.bundle.* are treated as entry points
3. 3esbuild compiles, bundles, and optionally minifies each entry point
4. 4Output goes to assets/dist/[app]/js/ or assets/dist/[app]/css/
5. 5Filenames include content hashes for cache-busting: main.bundle.HASH.js

What it can do on your machine

Read from SKILL.md and the folder at commit 36cfa80. 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

  Shell commands in SKILL.md call:

  • yarn

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

• Network

  No URLs in SKILL.md. Its commands use yarn, 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.

• Compatibility

  Claude Code, Claude.ai Projects, Claude API. Frappe v14-v16.

  From compatibility in the SKILL.md frontmatter.

Context cost

Frappe Ops Frontend Build loads about 2.7k tokens when it runs, and up to ~5k if it reads all its reference files. Until then it costs about 145 tokens; SKILL.md has 654 words of instructions outside code blocks.

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

~145

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

~2.7k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~5k

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); files beside SKILL.md are not scanned.

SKILL.md

The full file from Impertio-Studio/Frappe_Claude_Skill_Package at commit 36cfa80, republished under its MIT licence (© Impertio-Studio). 654 words, ~2,671 tokens.

name

frappe-ops-frontend-build

description

Use when configuring frontend asset bundling, migrating from build.json (v14) to esbuild (v15+), or troubleshooting SCSS/CSS compilation. Prevents build failures from mixing v14 and v15 build systems and misconfigured asset pipelines. Covers esbuild configuration (v15+), build.json (v14), asset bundling, SCSS compilation, bundle.js setup, bench build flags. Keywords: esbuild, build.json, frontend build, SCSS, CSS, asset bundling, bench build, bundle.js, webpack, build error, assets not loading, CSS not updating, JS not compiling, bench build fails..

compatibility

Claude Code, Claude.ai Projects, Claude API. Frappe v14-v16.

license

MIT

metadata.author

OpenAEC-Foundation

metadata.version

2.0

Which build system?
├── Frappe v14?
│   └── build.json — Concatenation-based bundling
├── Frappe v15+?
│   └── esbuild — ES module bundling with *.bundle.* convention
└── Migrating v14 → v15?
    └── Replace build.json with *.bundle.* files in public/

{
  "js/myapp.min.js": [
    "public/js/file1.js",
    "public/js/file2.js"
  ],
  "css/myapp.min.css": [
    "public/css/style1.css",
    "public/css/style2.css"
  ]
}

myapp/
└── public/
    ├── js/
    │   └── myapp.bundle.js       # → dist/myapp/js/myapp.bundle.HASH.js
    ├── css/
    │   └── myapp.bundle.scss     # → dist/myapp/css/myapp.bundle.HASH.css
    └── components/
        └── widget.bundle.js      # → dist/myapp/js/widget.bundle.HASH.js

// myapp/public/js/myapp.bundle.js
import { createApp } from "vue";
import MyComponent from "./components/MyComponent.vue";

// ES6 imports are resolved by esbuild
import "../css/myapp.bundle.scss";

// npm packages (installed via yarn) can be imported directly
import dayjs from "dayjs";

createApp(MyComponent).mount("#myapp-root");

# hooks.py — loads in /app (Desk)
app_include_js = "myapp.bundle.js"
app_include_css = "myapp.bundle.css"

# Multiple files
app_include_js = ["myapp.bundle.js", "extra.bundle.js"]
app_include_css = ["myapp.bundle.css", "extra.bundle.css"]

# hooks.py — loads on web pages (portal)
web_include_js = "myapp-web.bundle.js"
web_include_css = "myapp-web.bundle.css"

# hooks.py — loads on specific Desk pages
page_js = {"page_name": "public/js/custom_page.js"}

# hooks.py — loads on specific Web Forms
webform_include_js = {"ToDo": "public/js/custom_todo.js"}
webform_include_css = {"ToDo": "public/css/custom_todo.css"}

<!-- Include script with correct hash -->
{{ include_script("myapp.bundle.js") }}

<!-- Include stylesheet with correct hash -->
{{ include_style("myapp.bundle.css") }}

<!-- Get path string only (no HTML tag) -->
<script src="{{ bundled_asset('myapp.bundle.js') }}"></script>

// Load asset on demand (returns Promise)
frappe.require("myapp.bundle.js", () => {
    // Asset loaded, initialize component
    myapp.init();
});

// Multiple assets
frappe.require(["widget.bundle.js", "widget.bundle.css"], () => {
    // Both loaded
});

// myapp/public/css/myapp.bundle.scss

// Import Frappe variables (available in all apps)
@import "frappe/public/scss/variables";

// Import partials (NOT bundles — no .bundle. in name)
@import "./components/header";
@import "./components/sidebar";

.myapp-container {
  padding: var(--padding-lg);
  background: var(--bg-color);
}

public/css/
├── myapp.bundle.scss        # Entry point — compiled
├── _variables.scss          # Partial — imported only
└── components/
    ├── _header.scss         # Partial — imported only
    └── _sidebar.scss        # Partial — imported only

# Auto-rebuild on file changes
bench watch

# Via config
bench set-config -g live_reload true

# Via environment variable
export LIVE_RELOAD=1

// myapp/public/js/mypage.bundle.js
import { createApp } from "vue";
import { FrappeUI } from "frappe-ui";
import App from "./App.vue";

const app = createApp(App);
app.use(FrappeUI);
app.mount("#myapp-page");

# Create a Page DocType or use www/ for web pages
# The bundle loads via hooks.py or include_script()

# Install from app directory
cd apps/myapp
yarn add vue frappe-ui dayjs

ERROR: Could not resolve "some-package"

cd apps/myapp && yarn add some-package

bench build --force
bench clear-cache

bench build --app myapp --force

public/
├── js/
│   ├── myapp.bundle.js          # Core — loaded on every page via hooks
│   ├── report-widget.bundle.js  # Lazy — loaded only on report pages
│   └── chart-tools.bundle.js    # Lazy — loaded only when charts needed
└── css/
    ├── myapp.bundle.scss        # Core — loaded on every page via hooks
    └── print.bundle.scss        # Lazy — loaded only for print views

© Impertio-Studio, 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 3 other files (references) in skills/source/ops/frappe-ops-frontend-build of Impertio-Studio/Frappe_Claude_Skill_Package.

• SKILL.md
• references/.gitkeep
• references/anti-patterns.md
• references/examples.md

Open the folder on GitHubat commit 36cfa80