The moment your project matters, the chat should stop being the only copy of it. Step 4 is the one I nearly skipped: without the schema in migrations you cannot rebuild the database anywhere else.
Workflow
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1. In Lovable, connect GitHub and push. The repo is now the source of truth, not the chat history.
2. Clone it, run `npm install`, and copy the environment variables into `.env.local`.
3. Start it locally once before changing anything. If it does not start, fix that first.
4. Put the schema in version control: `supabase link`, then `supabase db pull`, and commit the migration it writes.
5. Make sure `.env*` is in `.gitignore`, and rotate every key that was ever pasted into the chat.
6. From here edit locally. Two-way editing without a habit of pulling first loses work.
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