chore: remove maincloud configuration

.codex/skills/spacetimedb-cli/SKILL.md

@@ -44,8 +44,8 @@ spacetime generate --lang typescript|csharp|rust|unrealcpp --out-dir ./bindings
 ### Publishing & Deployment
 
 ```bash
-# Publish to Maincloud (default)
-spacetime publish my-database --yes
+# Publish to an explicit server
+spacetime publish my-database --server http://127.0.0.1:3101 --yes
 
 # Publish to local server
 spacetime publish my-database --server local --yes
@@ -133,8 +133,8 @@ spacetime logout
 
 | Name | URL | Description |
 |------|-----|-------------|
-| `maincloud` | `https://maincloud.spacetimedb.com` | Production cloud (default) |
 | `local` | `http://127.0.0.1:3000` | Local development server |
+| `dev` | `http://127.0.0.1:3101` | Genarrative local development server |
 
 ## Common Workflows
 
@@ -224,6 +224,6 @@ rustup target add wasm32-unknown-unknown
 ## Notes
 
 - Many commands are marked UNSTABLE and may change
-- Default server is `maincloud` unless configured otherwise
+- Genarrative scripts should pass `--server` or `--server-url` explicitly instead of relying on the CLI default
 - Use `--yes` flag in scripts to avoid interactive prompts
 - Dev mode watches files and auto-rebuilds on changes