fix: run API dev stack in dev mode

docker-compose.dev.yml

@@ -25,6 +25,11 @@ services:
       - .env.dev
     environment:
       - REDIS_HOST=redis-dev
+      - REDIS_DB_DEV=0
+      - BACKEND_DEV_MODE=true
+      - APP_ENV=development
+      - ENVIRONMENT=development
+      - START_MODE=dev
       - RUN_INIT=false
       - INIT_MODE=infra
     ports:
@@ -45,6 +50,10 @@ services:
       - .env.dev
     environment:
       - REDIS_HOST=redis-dev
+      - REDIS_DB_DEV=0
+      - BACKEND_DEV_MODE=true
+      - APP_ENV=development
+      - ENVIRONMENT=development
       - API_HEALTH_URL=http://192.168.0.64:18000/health
     depends_on:
       redis-dev:

docker-entrypoint.sh

@@ -98,11 +98,13 @@ if [ "$RUN_INIT" = "true" ]; then
     fi
 fi
 
-# Start the production server (unless init-only mode)
+# Start the server (unless init-only mode). Default remains production, but
+# development Compose can set START_MODE=dev so cc-api-dev reports and uses
+# development Redis/config instead of silently booting as prod.
+START_MODE="${START_MODE:-prod}"
 if [ "$1" != "init-only" ] && [ -z "$INIT_ONLY" ]; then
-    print_status "Starting production server..."
-    exec ./start.sh prod
+    print_status "Starting ${START_MODE} server..."
+    exec ./start.sh "$START_MODE"
 else
     print_status "Init-only mode - not starting server"
 fi
-

tests/test_dev_stack.py

@@ -40,6 +40,8 @@ def test_dev_api_health_endpoint_is_healthy():
     assert payload['status'] == 'healthy'
     assert payload['services']['supabase']['status'] == 'healthy'
     assert payload['services']['redis']['status'] == 'healthy'
+    assert payload['services']['redis']['environment'] == 'dev'
+    assert payload['services']['redis']['database'] == 0
 
 
 def test_supabase_dev_seed_core_counts():