# Manifestack

> A free, read-only agent skill for Claude Code, Cursor and Codex that audits your SaaS stack for plan limits, bills, overlaps and data-rule gaps.

Manifestack is an open-source skill for coding agents such as Claude Code, Cursor and Codex. Ask it a question like "what breaks first at 50k users?" and it reports the bills, outages and compliance gaps ahead of you, each finding with a fix. Prices and limits are read from vendors' own public pages.

## What It Is

Manifestack is an agent skill that helps pick, audit and guard the third-party services in a software stack. It reads your repo (JavaScript, Python and Go dependencies, config files and env var names) and checks each service against requirements such as budget, user growth and data residency. It is read-only: it writes only inside `.manifestack/`, and needs no API keys or account.

## How the workflow runs

- **New project:** it asks about users, budget, data rules and team, then proposes and prices a stack from launch to 100k users.
- **Existing project:** it scans the product and reports what breaks or costs too much, ranked by severity, with timing, cost and a fix per finding.
- **Vendor comparison:** `/manifestack compare neon supabase` weighs two or three vendors on your workload, including what a switch would take.
- **Every change:** in Claude Code and Cursor, a hook flags each newly added vendor SDK and checks it against your requirements.

## Memory in STACK.md

Requirements, plans and the reasons behind decisions are stored in `.manifestack/STACK.md` in your repo. Entries can carry a revisit trigger, for example a database size threshold, so later audits know when to recommend a change. Decisions are written only after you confirm, and secrets are never stored.

## Setup path

It requires Node.js 22 or newer. Run `npx manifestack` to detect installed agents, or pass `--agent claude-code`, `cursor` or `codex`. It also detects Copilot, Windsurf, OpenCode, Cline and Gemini CLI, and can be installed as a Claude Code plugin or via the skills CLI. The project is MIT licensed.

## Features
- Stack audit with severity-ranked findings and fixes
- New-project stack proposal priced from launch to 100k users
- Side-by-side vendor comparison on your workload
- Live pricing and limits read from vendor pages
- STACK.md persistent requirements and decisions with revisit triggers
- New-service hook in Claude Code and Cursor
- Read-only operation with no API keys or account
- Scans JavaScript, Python and Go dependencies and config files

## Integrations
Claude Code, Cursor, Codex, GitHub Copilot, Windsurf, OpenCode, Cline, Gemini CLI, Vercel, Supabase, Stripe, Cloudflare, Firebase, Neon, Clerk, Resend, Sentry, PostHog, OpenAI, Anthropic, Google Gemini, Netlify, Railway, MongoDB Atlas

## Platforms
ANDROID, IOS, WEB, API, CLI

## Pricing
Open Source

## Version
v0.4.0

## Links
- Website: https://manifestack.com
- Documentation: https://github.com/manifestack/manifestack#readme
- Repository: https://github.com/manifestack/manifestack
- EveryDev.ai: https://www.everydev.ai/tools/manifestack