diff --git a/supabase/functions/seed-test-data/index.ts b/supabase/functions/seed-test-data/index.ts
index 8c3f9acb..517f9744 100644
--- a/supabase/functions/seed-test-data/index.ts
+++ b/supabase/functions/seed-test-data/index.ts
@@ -72,6 +72,112 @@ function getPopulationLevel(fieldDensity: string, index: number): number {
   return 2;
 }
 
+function randomFloat(min: number, max: number, decimals = 2): number {
+  const value = Math.random() * (max - min) + min;
+  return parseFloat(value.toFixed(decimals));
+}
+
+function randomDatePrecision(): 'day' | 'month' | 'year' {
+  return randomItem(['day', 'month', 'year']);
+}
+
+function shouldPopulateField(
+  fieldDensity: string,
+  index: number,
+  fieldImportance: 'low' | 'medium' | 'high'
+): boolean {
+  const level = getPopulationLevel(fieldDensity, index);
+  
+  if (fieldImportance === 'high') return level >= 1;
+  if (fieldImportance === 'medium') return level >= 2;
+  if (fieldImportance === 'low') return level >= 3;
+  
+  return false;
+}
+
+// Category-specific field generators
+function generateWaterRideFields(fieldDensity: string, index: number) {
+  if (!shouldPopulateField(fieldDensity, index, 'medium')) return {};
+  
+  return {
+    water_depth_cm: randomInt(30, 300),
+    splash_height_meters: randomFloat(1, 20, 1),
+    wetness_level: randomItem(['dry', 'light', 'moderate', 'soaked']),
+    flume_type: randomItem(['log', 'tube', 'raft', 'boat']),
+    boat_capacity: randomInt(2, 20)
+  };
+}
+
+function generateDarkRideFields(fieldDensity: string, index: number) {
+  if (!shouldPopulateField(fieldDensity, index, 'medium')) return {};
+  
+  return {
+    theme_name: randomItem(['Space Adventure', 'Haunted Mansion', 'Underwater Journey', 'Fantasy Quest']),
+    story_description: 'An immersive journey through a themed environment with exciting scenes.',
+    show_duration_seconds: randomInt(180, 600),
+    animatronics_count: randomInt(5, 50),
+    projection_type: randomItem(['2d', '3d', 'holographic', 'mixed']),
+    ride_system: randomItem(['omnimover', 'tracked', 'trackless', 'boat']),
+    scenes_count: randomInt(5, 20)
+  };
+}
+
+function generateFlatRideFields(fieldDensity: string, index: number) {
+  if (!shouldPopulateField(fieldDensity, index, 'medium')) return {};
+  
+  return {
+    rotation_type: randomItem(['horizontal', 'vertical', 'both', 'none']),
+    motion_pattern: randomItem(['circular', 'pendulum', 'spinning', 'wave', 'random']),
+    platform_count: randomInt(1, 8),
+    swing_angle_degrees: randomInt(45, 180),
+    rotation_speed_rpm: randomInt(5, 30),
+    arm_length_meters: randomFloat(5, 25, 1),
+    max_height_reached_meters: randomFloat(10, 80, 1)
+  };
+}
+
+function generateKiddieRideFields(fieldDensity: string, index: number) {
+  if (!shouldPopulateField(fieldDensity, index, 'medium')) return {};
+  
+  return {
+    min_age: randomInt(2, 5),
+    max_age: randomInt(8, 12),
+    educational_theme: randomItem(['counting', 'colors', 'animals', 'shapes', 'letters']),
+    character_theme: randomItem(['dinosaurs', 'princesses', 'superheroes', 'animals', 'vehicles'])
+  };
+}
+
+function generateTransportationRideFields(fieldDensity: string, index: number) {
+  if (!shouldPopulateField(fieldDensity, index, 'medium')) return {};
+  
+  return {
+    transport_type: randomItem(['monorail', 'train', 'skyway', 'gondola', 'ferry']),
+    route_length_meters: randomInt(500, 5000),
+    stations_count: randomInt(2, 8),
+    vehicle_capacity: randomInt(20, 200),
+    vehicles_count: randomInt(2, 12),
+    round_trip_duration_seconds: randomInt(300, 1800)
+  };
+}
+
+function generateSubmissionNotes(
+  fieldDensity: string,
+  index: number,
+  entityType: string
+): string | undefined {
+  if (!shouldPopulateField(fieldDensity, index, 'low')) return undefined;
+  
+  const notes = [
+    `Updated ${entityType} information from official source`,
+    `Added comprehensive data for testing purposes`,
+    `Verified information through multiple sources`,
+    `Historical data added for completeness`,
+    `Technical specifications verified with manufacturer`
+  ];
+  
+  return randomItem(notes);
+}
+
 // Registry helper functions for cascading test data
 async function registerTestEntity(
   supabase: any,
@@ -602,11 +708,28 @@ Deno.serve(async (req) => {
             companyData.founded_year = randomInt(1950, 2020);
             const location = randomItem(CITIES);
             companyData.headquarters_location = `${location.city}, ${location.country}`;
+            
+            // Add full founded date with precision
+            companyData.founded_date = `${companyData.founded_year}-01-01`;
+            companyData.founded_date_precision = randomDatePrecision();
+            
+            // Add defunct date for some companies (10% chance at level 3+)
+            if (level >= 3 && Math.random() > 0.9) {
+              const defunctYear = randomInt(companyData.founded_year + 10, 2024);
+              companyData.defunct_date = `${defunctYear}-12-31`;
+              companyData.defunct_date_precision = randomDatePrecision();
+            }
           }
 
           if (level >= 3) {
             companyData.website_url = `https://test-${compType}-${i + 1}.example.com`;
             companyData.logo_url = `https://cdn.thrillwiki.com/images/test-${compType}-${i + 1}-logo/logo`;
+            companyData.source_url = `https://example.com/source/${compType}/${i + 1}`;
+            
+            const notes = generateSubmissionNotes(fieldDensity, i, compType);
+            if (notes) {
+              companyData.submission_notes = notes;
+            }
           }
 
           if (level >= 4) {
@@ -664,6 +787,7 @@ Deno.serve(async (req) => {
 
         if (level >= 1) {
           parkData.opening_date = randomDate(1950, 2024);
+          parkData.opening_date_precision = randomDatePrecision();
           parkData.description = `A ${parkData.park_type === 'theme_park' ? 'themed' : 'exciting'} park for all ages with various attractions.`;
         }
 
@@ -706,8 +830,16 @@ Deno.serve(async (req) => {
           }
           if (Math.random() > 0.9) {
             parkData.closing_date = randomDate(2000, 2024);
+            parkData.closing_date_precision = randomDatePrecision();
             parkData.status = 'closed';
           }
+          
+          parkData.source_url = `https://example.com/source/park/${i + 1}`;
+          const notes = generateSubmissionNotes(fieldDensity, i, 'park');
+          if (notes) {
+            parkData.submission_notes = notes;
+          }
+          
           parkData.banner_image_id = `test-park-banner-${i + 1}`;
           parkData.banner_image_url = `https://cdn.thrillwiki.com/images/test-park-banner-${i + 1}/banner`;
         }
@@ -767,7 +899,7 @@ Deno.serve(async (req) => {
         
         const parkItemId = createdSubmissionItems.park.length > 0 ? randomItem(createdSubmissionItems.park) : undefined;
 
-        const category = randomItem(['roller_coaster', 'flat_ride', 'water_ride', 'dark_ride']);
+        const category = randomItem(['roller_coaster', 'flat_ride', 'water_ride', 'dark_ride', 'kiddie_ride', 'transport_ride', 'family_ride']);
         const rideData: any = {
           name: shouldVersionChain ? `Test Ride ${slug} (Updated)` : `Test Ride ${i + 1}`,
           slug: slug,
@@ -778,6 +910,7 @@ Deno.serve(async (req) => {
 
         if (level >= 1) {
           rideData.opening_date = randomDate(2000, 2024);
+          rideData.opening_date_precision = randomDatePrecision();
           rideData.description = `An exciting ${category.replace('_', ' ')} attraction.`;
           rideData.height_requirement = randomInt(100, 140);
         }
@@ -803,10 +936,30 @@ Deno.serve(async (req) => {
             rideData.inversions = randomInt(0, 7);
             rideData.coaster_type = randomItem(['steel', 'wooden', 'hybrid']);
             rideData.seating_type = randomItem(['sit_down', 'inverted', 'flying', 'stand_up']);
+            
+            // Add material arrays for roller coasters
+            if (shouldPopulateField(fieldDensity, i, 'medium')) {
+              rideData.track_material = [randomItem(['steel', 'wood', 'hybrid'])];
+              rideData.support_material = [randomItem(['steel', 'wood', 'concrete'])];
+              rideData.propulsion_method = [randomItem(['chain_lift', 'cable_lift', 'launch', 'gravity', 'tire_drive'])];
+            }
           }
           rideData.card_image_id = `test-ride-card-${i + 1}`;
           rideData.card_image_url = `https://cdn.thrillwiki.com/images/test-ride-card-${i + 1}/card`;
         }
+        
+        // Add category-specific fields based on ride type
+        if (category === 'water_ride') {
+          Object.assign(rideData, generateWaterRideFields(fieldDensity, i));
+        } else if (category === 'dark_ride') {
+          Object.assign(rideData, generateDarkRideFields(fieldDensity, i));
+        } else if (category === 'flat_ride') {
+          Object.assign(rideData, generateFlatRideFields(fieldDensity, i));
+        } else if (category === 'kiddie_ride') {
+          Object.assign(rideData, generateKiddieRideFields(fieldDensity, i));
+        } else if (category === 'transport_ride') {
+          Object.assign(rideData, generateTransportationRideFields(fieldDensity, i));
+        }
 
         if (level >= 4) {
           if (createdCompanies.designer.length > 0) {
@@ -820,6 +973,20 @@ Deno.serve(async (req) => {
           rideData.length_meters = randomInt(500, 2000);
           rideData.drop_height_meters = randomInt(10, 80);
           rideData.max_g_force = (Math.random() * 4 + 2).toFixed(1);
+          
+          rideData.source_url = `https://example.com/source/ride/${i + 1}`;
+          const notes = generateSubmissionNotes(fieldDensity, i, 'ride');
+          if (notes) {
+            rideData.submission_notes = notes;
+          }
+          
+          // Add closing date for some rides
+          if (Math.random() > 0.95) {
+            rideData.closing_date = randomDate(2010, 2024);
+            rideData.closing_date_precision = randomDatePrecision();
+            rideData.status = 'closed';
+          }
+          
           rideData.banner_image_id = `test-ride-banner-${i + 1}`;
           rideData.banner_image_url = `https://cdn.thrillwiki.com/images/test-ride-banner-${i + 1}/banner`;
         }
@@ -922,6 +1089,12 @@ Deno.serve(async (req) => {
         if (level >= 2) {
           modelData.card_image_id = `test-model-card-${i + 1}`;
           modelData.card_image_url = `https://cdn.thrillwiki.com/images/test-model-card-${i + 1}/card`;
+          modelData.source_url = `https://example.com/source/ride-model/${i + 1}`;
+          
+          const notes = generateSubmissionNotes(fieldDensity, i, 'ride model');
+          if (notes) {
+            modelData.submission_notes = notes;
+          }
         }
 
         if (level >= 3) {