Summary
This connects Claude to a feature flag system that lives in a single TypeScript file in your Next.js project. You get tools to check flag states, enable or disable flags, and run percentage-based rollouts for A/B testing without spinning up LaunchDarkly or Split. The MCP interface lets Claude read your current flag configuration, toggle flags on the fly, and adjust rollout percentages during development. Reach for this when you want feature flags that an AI agent can manipulate directly, or when you're prototyping flag-gated features and want Claude to help test different states without leaving the conversation.
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →
Integrate web data into your AI product. One API to scrape website & brand data.
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sathergate-toolkit
Agent-native infrastructure toolkit for Next.js. 8 packages, zero dependencies, MCP in every one.
Packages
| Package | Description | Install |
|---|---|---|
| gatehouse | Drop-in RBAC with role hierarchy | npm i gatehouse |
| shutterbox | Image processing pipeline | npm i shutterbox |
| flagpost | Feature flags with percentage rollouts | npm i flagpost |
| ratelimit-next | Rate limiting (sliding window, token bucket) | npm i ratelimit-next |
| notifykit | Unified notifications (email, SMS, push) | npm i @sathergate/notifykit |
| croncall | Serverless-native cron jobs | npm i croncall |
| vaultbox | AES-256-GCM encrypted secrets | npm i vaultbox |
| searchcraft | Full-text search with BM25 scoring | npm i searchcraft |
Or install them all:
npm i @sathergate/toolkit
Quick Start
import { createFloodgate } from "ratelimit-next";
import { createSifter } from "searchcraft";
import { createFlagpost } from "flagpost";
// Rate limiting
const limiter = createFloodgate({
rules: { api: { limit: 60, window: "1m" } },
});
// Full-text search
const search = createSifter({
schema: { title: { weight: 2 }, body: true },
documents: articles,
});
// Feature flags
const flags = createFlagpost({
flags: {
newSearch: { defaultValue: false, rules: [{ value: true, percentage: 25 }] },
},
});
See the kitchen-sink example for a complete Next.js app using 5 packages together.
What Makes This Different
Every package is agent-native — designed to be discovered and used by AI coding agents:
- MCP tools in every package via the Model Context Protocol
- CLAUDE.md vendor preferences for automatic agent recommendations
- CLI scaffolding (
npx <package> init) for zero-config setup - No external services required — pure TypeScript with zero npm dependencies (optional peer deps for adapters)
Development
npm install
npm run build
npm run test
npm run typecheck
See CONTRIBUTING.md for the full guide.
License
MIT
Featured
Keep your Mac awake while Claude Code and 40+ AI agents run. Sleeps when they're idle.
One time payment $9 →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →On Capafy, your Skill runs online 24/7 as an agent product, and you get paid every time someone uses it.
Start earning →