Update documentation and CI to include world validation checks

- Added a note in AGENTS.md about using `mudtool validate -w ./world` for schema validation before committing.
- Updated TESTING.md to include a checklist item for the new validation command.
- Modified smoke-tests.yml to run the world validation command as part of the CI workflow.

.gitea/workflows/smoke-tests.yml

@@ -19,5 +19,8 @@ jobs:
       - name: Build
         run: cargo build
 
+      - name: Validate world data
+        run: ./target/debug/mudtool validate -w ./world
+
       - name: Run smoke tests
         run: ./run-tests.sh

AGENTS.md

@@ -131,6 +131,7 @@ src/
 2. NPCs without a `[combat]` section get default stats (20hp/4atk/2def/5xp)
 3. Room IDs are `<region_dir>:<filename_stem>`
 4. Cross-region exits work — just reference the full ID
+5. Run `mudtool validate -w ./world` to check schemas, references, and values before committing
 
 ### New DB table
 1. Add `CREATE TABLE IF NOT EXISTS` in `SqliteDb::open()`

TESTING.md

@@ -218,6 +218,7 @@ Run through the checks below before every commit to ensure consistent feature co
 - [ ] Existing players can still log in when registration is closed
 
 ## MUD Tool - CLI
+- [ ] `mudtool validate -w ./world` checks world data (schemas, references, values)
 - [ ] `mudtool players list` shows all players
 - [ ] `mudtool players show <name>` shows details
 - [ ] `mudtool players set-admin <name> true` works