The fix isn't "prompt better". It's giving the AI a mold it already knows - audited bricks for auth, billing, workspaces, permissions. So we built Fonderie. MIT licensed. No seats. No rent.

The fix isn't "prompt better". It's giving the AI a mold it already knows - audited bricks for auth, billing, workspaces, permissions. So we built Fonderie. MIT licensed. No seats. No rent.

The fix isn't "prompt better". It's giving the AI a mold it already knows - audited bricks for auth, billing, workspaces, permissions. So we built Fonderie. MIT licensed. No seats. No rent.

We ran Claude Code 36 times building the same SaaS backend. It hardcoded secrets twice, burned 3× the tokens, and reinvented auth every single time. So we built Fonderie — open-source molds for…