Why Harrington is built the way it is.

Authorship is not negotiable

When you write a song, you are the author. Not the tool you used, not the AI that suggested a line. A song that was written for you isn't yours — and most songwriters know the difference, even if they can't always articulate it.

Harrington is built to protect that. It does not generate songs. It does not rewrite sections. It does not make creative decisions on your behalf. What it does: analyze, suggest, and offer alternatives — and then get out of the way so you can decide.

Suggest, never override

Every AI action in Harrington returns options, not answers. When you hit Refine on a line, you get three suggestions — different directions, different feels. You pick the one that's closest, then adjust it until it sounds like you. The AI helps you see what's possible. You decide what belongs.

This is a deliberate design choice, not a limitation. One "answer" would undermine your agency. Three options keeps you in the driver's seat.

Local-first is a trust statement

Your songs live on your machine. Harrington's core features work without an internet connection. The AI model runs locally, on your hardware, using Apple Silicon's GPU.

This is not just a technical decision. It's a statement about whose data your songs are. When you write in Harrington, you're not contributing to a training dataset. You're not sending your creative work to a server. You're writing in a tool that stays out of the cloud unless you choose otherwise.

External AI (via BYOK) is available for users who want deeper analysis. That's an explicit, informed choice — not a default.

Capability, not subscription

Every capability in Harrington has a substantive local implementation. Premium makes those capabilities better — it doesn't unlock them. There are no feature cliffs.

A new songwriter on the free tier gets the same core tools as an experienced songwriter on BYOK. The on-device model is genuinely useful. Premium is a quality upgrade for users who want more depth — not a gate that makes the free tier feel intentionally limited.

Real workflow handoff

A song that can't leave the tool isn't useful. Harrington is designed around the idea that the writing environment should hand off cleanly to the production environment.

ChordPro export is first-class — character-exact chord alignment, proper section directives, flow-resolved arrangement. The result imports into OnSong, Planning Center, and other tools without formatting cleanup. That handoff is part of the product, not an afterthought.

Human authorship requires a human

Harrington is designed for use by a person — one person, at a keyboard, making creative decisions. This is not incidental. It is the premise.

Using Harrington through an automated script, an AI agent, an orchestration tool, or any non-human interface — including tools like Claude Desktop or similar — is explicitly prohibited. Not because of a technical limitation, but because it is a categorical misuse of what the tool is for. If an agent is writing the song, there is no author. The authorship promise is void.

Similarly, each license is for one person. Not one team, not one organization, not one studio account shared across employees. One human being, doing their own creative work.

These aren't arbitrary rules — they're the same principle stated two different ways. Authorship is personal. So is the license.

A workbench, not a generator

The most important thing to understand about Harrington: it is a workbench. It gives you structured space to work, tools to analyze your work, and assistance when you're stuck. It does not build the thing for you.

That distinction is the foundation for trust — especially in communities where authorship matters. Worship leaders singing their congregation's songs. Songwriters whose work reflects their own experience. Mentors who want to teach craft, not shortcut it.

Harrington helps you write better songs — without writing them for you.