Firmament for Cursor

Make your team's Cursor multiplayer

You fix something in Cursor this morning. A retry that finally worked. A rule about how your migrations actually run. Your teammate's Cursor never finds out. Neither does the Claude Code you open after lunch. Five engineers on Cursor is five separate brains, each relearning what the others already know.

Firmament doesn't replace Cursor or its rules. You keep both. Firmament plugs in over MCP and connects what your agents learn, so one shared brain sits behind all of them.

Free for a team of three. 30-day trial of everything.

What changes

Can't I just commit my rules to git?

You can, and keep doing it. But a committed rules file is only what someone remembered to write down, and it sits frozen until someone updates it. Firmament captures what your agents actually learn while they work, keeps it current as things change, and carries it across every tool, not just the repo Cursor is looking at.

How it works in Cursor

  1. 01Add Firmament as an MCP server in Cursor. One URL, your existing login.
  2. 02Import the rules you already have.
  3. 03Cursor asks Firmament before a task, and reports back what it learned after.

Read the five-minute quickstart

Does this replace Cursor's rules or Memories?

No. Cursor's Memories stay yours and private. Firmament is the shared layer on top, for the lessons worth giving the whole team.

Do my teammates have to change how they work?

No. Everyone keeps using Cursor exactly as they do now. Firmament rides along over MCP, so the sharing happens without anyone changing their setup.

What happens when I move from Cursor to Claude Code?

The knowledge stays with you, not the tool. Connect the new agent to the same Firmament and it picks up where the last one left off.

In fairness

When Cursor on its own is enough

If you are solo, in one project, in Cursor only, Cursor's own rules and Memories are genuinely enough. Firmament starts to matter the moment a second person or a second tool shows up.

Firmament also works in

Give every agent on your team the same brain.