What is fireact-builder?

A customization assistant for Fireact SaaS applications, which are subscription-based web apps built with the Fireact framework.

Use it to add pages and components, change navigation and branding, configure permissions and translations, and extend cloud functions or Firestore data collections.

It first checks whether the current project is actually a Fireact app, reducing the risk of applying project-specific changes in the wrong codebase. It reads the app's configuration and existing components before changes are made.

fireact-builder — Skill for Claude Code by fireact-dev/main

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add fireact-dev/main --skill fireact-builder

Clone the repo

git clone --depth 1 https://github.com/fireact-dev/main

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/fireact-dev/main/fireact-builder/github.svg)](https://agentmods.dev/skills/fireact-dev/main/fireact-builder)

Your own site

<a href="https://agentmods.dev/skills/fireact-dev/main/fireact-builder"><img src="https://agentmods.dev/badge/skills/fireact-dev/main/fireact-builder/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/fireact-dev/main/fireact-builder"><img src="https://agentmods.dev/badge/skills/fireact-dev/main/fireact-builder.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,416 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium MCP Rug Pull · line 21
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00062	$0.02416
Opus 5.5	$0.00025	$0.00966
Sonnet 5.5	$0.00012	$0.00483
Haiku 4.5	$0.00006	$0.00242

Measured 1mo ago against content hash 4c546d8bff2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fireact-builder scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

create-fireact-app/templates/.claude/skills/fireact-builder/SKILL.md · 275 lines

How it starts

The opening of the file, as written. The whole thing — 275 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fireact Builder — Post-Installation Customization Skill

You help developers customize and extend their Fireact SaaS apps via natural language. This skill covers adding pages, replacing components, customizing navigation, branding, Cloud Functions, Firestore collections, and i18n.

1. Project Detection

Before doing anything, confirm this is a Fireact project:

Check package.json for @fireact.dev/app in dependencies
Check src/config/app.config.json exists
Check src/App.tsx imports from @fireact.dev/app

If any check fails, tell the user this doesn't appear to be a Fireact project and suggest running npx create-fireact-app first.

2. State Reading Protocol

MUST read these files before making any changes to understand the current project state:

File	What to learn
`src/App.tsx`	Current routing, imports, which components are local vs from `@fireact.dev/app`
`src/config/app.config.json`	Route paths, permissions, settings
`src/config/stripe.config.json`	Subscription plans
`src/i18n/en.ts`	Existing translation keys
`src/components/` (list files)	Existing custom components
`functions/src/index.ts`	Existing Cloud Functions
`firestore.rules`	Existing security rules

3. Customization Playbooks

A. Add New Subscription Page

Use when the user wants a page scoped to a subscription (e.g., "add a reports page", "add an analytics page").

Steps:

Create component at src/components/<PageName>.tsx:
- Import useSubscription, useConfig, useTranslation from @fireact.dev/app
- Handle loading state (spinner) and error state (redirect to home)
- Use TailwindCSS for styling — no inline styles
- See references/component-patterns.md for template
Add route key to src/config/app.config.json under pages:
```
"<pageName>": "/subscription/:id/<slug>"
```

Add route in src/App.tsx inside the SubscriptionProvider > SubscriptionLayout route block:

<Route path={appConfig.pages.<pageName>} element={
  <ProtectedSubscriptionRoute requiredPermissions={['access']}>
    <PageName />
  </ProtectedSubscriptionRoute>
} />

Read the full file on GitHub · 275 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 275 lines · 62 tokens per session scan A 4c546d8bff2f

Subscribe to this mod's changes

fireact-builder is a skill published in the GitHub repository fireact-dev/main (559 stars, last pushed 1mo ago), licensed MIT. It adds 62 tokens to every session and 2,416 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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