Open Source Newsletter App Template
Publish issues, collect subscribers, and manage archives.
A newsletter foundation for creators and teams that want owned publishing, subscriber lists, and clean issue archives.
This is the real app, not a mockup. Whatever you enter in the demo stays in your browser and belongs to nobody.
What you get
One zip. Everything to own it.
Newsletter Platform is a personal and business publishing foundation with subscriber capture, issue archives, email provider boundaries, unsubscribe logic, and content workflows. It is intentionally small enough to understand quickly and structured enough for an agent to extend safely.
- Issue editor
- Subscriber forms
- Archive pages
- Email sending boundary
- Unsubscribe flow
newsletter-platform/├── app/the running Next.js app├── agent/START_HERE, PROJECT_MAP, RULES, RECIPES, TESTS, DEPLOY├── CLAUDE.mdread automatically by Claude Code├── AGENTS.mdread automatically by Codex├── .cursor/rules/loaded automatically by Cursor└── README.mdrun it, then make it yours
Inside the app
Customize with AI
Your agent already knows this codebase.
Agent docs cover issue content, provider boundaries, subscriber fields, and email copy.
Prompts written against this app
Run it
5 min to your own copy.
- 01Create your editable app copy and unzip it.
- 02Run npm install.
- 03Run npm run dev and open http://localhost:3000.
- 04Read /agent/START_HERE.md before customizing.
- 05Swap the local-first storage boundary for your own backend when ready.
Newsletter Platform data stays in this browser by default.
No account, backend, or cloud sync is included in the current package.
An agent can add optional sync later while preserving the local-first default.
This package is standard-ready for Create My App and AI customization.
A full app-only PWA install route is not enabled yet for this app.
If this isn’t quite right
Take Newsletter Platform and make it yours.
Free, MIT, 5 min to running. The demo above is exactly what lands in your folder.