Vowline and Cursor
Use Cursor to write.
Use Vowline to prove.
Cursor is an AI code editor. Vowline is not an editor: it runs coding agents, Cursor among them, keeps a map of what your product promises, and checks every change on the exact commit.
| Cursor | Vowline | |
|---|---|---|
| What it is | An AI code editor: you write and change code together with an agent. | A control plane above coding agents: it plans, runs them and proves the result. |
| Where code is written | In the editor, in your working copy. | By the agent of your choice, in a separate git worktree per task. |
| Which models | Its built-in agent, with the models Cursor offers. | Claude Code, Codex or Cursor, per task or per teammate. |
| What the product promises | Not its job: the code is the focus. | A map of roles, flows and steps, built from the code, with checkable criteria. |
| Proof | Tests run when you or the agent run them. | Approved checks on the exact commit of every change; a promise drops back when its code changes. |
| Team | The agents you start yourself. | A lead and specialists with areas of the code, chats and a backlog. |
| Deciding | You review in the editor. | You confirm criteria and accept changes; production deploys need your click. |
They work together
Keep writing in Cursor. Add Cursor as an executor in Vowline, and a teammate on Cursor takes tasks from the backlog, works in its own worktree, and Vowline checks the result before anything reaches your branch.
If you also use Claude Code or Codex, each teammate can run on a different one: when one subscription runs low, Vowline says so in the chat and offers to switch.
When you need Vowline
When several agents change the same product and you can no longer tell what still works. Vowline answers that question with checks, not with an agent saying “done”.
Also: Vowline and Claude Code · Vowline and Codex
Cursor is a product of Cursor. Vowline is not affiliated with Cursor and runs Cursor with your own login.