chore: add environment-safety cursor rule

Never again touch production without explicit confirmation. This rule
codifies the hard-won lesson from 2026-04-19: ssh odoo-westin goes to
PRODUCTION (192.168.1.40, erp.westinhealthcare.ca), not dev, despite
the container being named odoo-dev-app.

alwaysApply: true.
Made-with: Cursor

.cursor/rules/environment-safety.mdc

@@ -0,0 +1,44 @@
+---
+description: Identify and verify target environment (production vs local dev) before ANY state-changing operation. Never assume; always verify.
+alwaysApply: true
+---
+
+# Environment Safety — Production vs Local Dev
+
+**The ssh alias `odoo-westin` (192.168.1.40, erp.westinhealthcare.ca) is PRODUCTION.** Do NOT test against it. `docker exec odoo-dev-app ...` via this ssh alias touches PRODUCTION despite the "-dev" in the container name.
+
+**Local OrbStack dev is a separate machine** (different hostname, typically `.orb.local` domain, accessed via a different connection path). Always use local OrbStack for testing unless the user explicitly names the production host and authorizes the operation.
+
+## Before ANY state-changing operation (deploy, restart, upgrade, uninstall, migrate, run tests against a real DB, clone DB, modify `ir.config_parameter`), you MUST:
+
+1. **Read the `odoo.conf` header.** If it contains `PRODUCTION`, stop and confirm with user.
+2. **Check the SSH target.** If the host/alias resolves to a public-facing domain (`erp.*`, customer-facing URL) or a LAN IP outside `127.0.0.0/8` and the user hasn't authorized production, stop.
+3. **Check the DB name + data scale.** Databases with tens of thousands of `account.move` rows or real client names in `res.company` are production regardless of what the container is called.
+4. **Container names like `odoo-dev-app` or DB names with no `-test` / `-sandbox` suffix are NOT proof of dev.** Ignore naming hints.
+
+## Ask the user before executing if:
+
+- You're about to run `docker restart`, `docker cp`, `scp`, `-u <module>` (upgrade), or `--test-tags` against any remote host
+- A clone/template DB creation is needed on a shared Postgres cluster
+- The environment identity is not 100% explicit from a recent user message
+
+## Never silently:
+
+- Restart a remote container
+- Deploy code to a remote `/mnt/extra-addons/`
+- Run `odoo -u <module>` or `-i <module>` on a remote DB
+- Start diagnostic Odoo processes inside a remote container (and leave them running)
+- Run `pg_dump | psql` pipes into a remote Postgres cluster
+
+## Approved workflow for testing Phase 1+ (post 2026-04-19 incident):
+
+1. ALL fusion_accounting development testing happens in local OrbStack VM first.
+2. Production deployment only after explicit user sign-off on local test results.
+3. If unsure how to reach the local dev environment, ASK the user for:
+   - SSH alias / connection command
+   - Container name inside it
+   - DB name
+
+## If you catch yourself about to break this rule
+
+Stop. Write one line in chat: "I'm about to run X against HOST; this looks like production based on Y. Proceed?" Wait for explicit confirmation.