Add relationship counts to list endpoint responses

internal/database/queries/queries.sql

@@ -48,6 +48,41 @@ SELECT "user_handle"
 FROM users
 ORDER BY "user_handle" ASC LIMIT $1 OFFSET $2;
 
+-- name: GetAllUsersWithCounts :many
+SELECT 
+    users."user_handle",
+    users."name",
+    COALESCE(project_counts.count, 0) AS project_count,
+    COALESCE(definition_counts.count, 0) AS definition_count,
+    COALESCE(instance_counts.count, 0) AS instance_count
+FROM users
+LEFT JOIN (
+    SELECT "owner", COUNT(DISTINCT "project_id") AS count
+    FROM projects
+    GROUP BY "owner"
+) project_counts ON users."user_handle" = project_counts."owner"
+LEFT JOIN (
+    SELECT "owner", COUNT(*) AS count
+    FROM definitions
+    GROUP BY "owner"
+) definition_counts ON users."user_handle" = definition_counts."owner"
+LEFT JOIN (
+    SELECT "owner", COUNT(*) AS count
+    FROM instances
+    GROUP BY "owner"
+) instance_counts ON users."user_handle" = instance_counts."owner"
+ORDER BY users."user_handle" ASC LIMIT $1 OFFSET $2;
+
+-- name: CountProjectsByUser :one
+SELECT COUNT(DISTINCT projects."project_id")
+FROM projects
+WHERE projects."owner" = $1;
+
+-- name: CountDefinitionsByUser :one
+SELECT COUNT(*)
+FROM definitions
+WHERE "owner" = $1;
+
 -- name: GetUsersByProject :many
 SELECT users."user_handle", users_projects."role"
 FROM users JOIN users_projects
@@ -186,6 +221,11 @@ ORDER BY "owner" ASC, "project_handle" ASC LIMIT $1 OFFSET $2;
 SELECT COUNT(*)
 FROM projects;
 
+-- name: CountProjectsUsingInstance :one
+SELECT COUNT(*)
+FROM projects
+WHERE "instance_id" = $1;
+
 -- name: LinkProjectToUser :one
 INSERT
 INTO users_projects (
@@ -305,6 +345,11 @@ WHERE definitions."owner" = $1
 ORDER BY definitions."owner" ASC, definitions."definition_handle" ASC 
 LIMIT $2 OFFSET $3;
 
+-- name: CountInstancesByDefinition :one
+SELECT COUNT(*)
+FROM instances
+WHERE "definition_id" = $1;
+
 
 -- === LLM Service Instances (user-specific instances with optional API keys) ===
 
@@ -564,6 +609,11 @@ SELECT COUNT(*)
 FROM instances
 WHERE "owner" = $1;
 
+-- name: CountSharedUsersForInstance :one
+SELECT COUNT(*)
+FROM instances_shared_with
+WHERE "instance_id" = $1;
+
 
 -- === EMBEDDINGS ===
 

internal/handlers/llm_services.go

@@ -227,11 +227,18 @@ func getUserDefinitionsFunc(ctx context.Context, input *models.GetUserDefinition
 	// Build response
 	ls := []models.DefinitionBrief{}
 	for _, d := range def {
+		// Count instances using this definition
+		instanceCount, err := queries.CountInstancesByDefinition(ctx, pgtype.Int4{Int32: d.DefinitionID, Valid: true})
+		if err != nil {
+			instanceCount = 0
+		}
+
 		ls = append(ls, models.DefinitionBrief{
-			Owner:            d.Owner,
-			DefinitionHandle: d.DefinitionHandle,
-			DefinitionID:     int(d.DefinitionID),
-			IsPublic:         d.IsPublic,
+			Owner:             d.Owner,
+			DefinitionHandle:  d.DefinitionHandle,
+			DefinitionID:      int(d.DefinitionID),
+			IsPublic:          d.IsPublic,
+			NumberOfInstances: int(instanceCount),
 		})
 	}
 	response := &models.GetUserDefinitionsResponse{}
@@ -765,10 +772,24 @@ func getUserInstancesFunc(ctx context.Context, input *models.GetUserInstancesReq
 	// Build response (hide API keys for shared instances)
 	ls := []models.InstanceBrief{}
 	for _, llm := range llms {
+		// Count projects using this instance
+		projectCount, err := queries.CountProjectsUsingInstance(ctx, pgtype.Int4{Int32: llm.InstanceID, Valid: true})
+		if err != nil {
+			projectCount = 0
+		}
+
+		// Count shared users for this instance
+		sharedUserCount, err := queries.CountSharedUsersForInstance(ctx, llm.InstanceID)
+		if err != nil {
+			sharedUserCount = 0
+		}
+
 		ls = append(ls, models.InstanceBrief{
-			Owner:          llm.Owner,
-			InstanceHandle: llm.InstanceHandle,
-			InstanceID:     int(llm.InstanceID),
+			Owner:               llm.Owner,
+			InstanceHandle:      llm.InstanceHandle,
+			InstanceID:          int(llm.InstanceID),
+			NumberOfProjects:    int(projectCount),
+			NumberOfSharedUsers: int(sharedUserCount),
 		})
 	}
 	response := &models.GetUserInstancesResponse{}

internal/handlers/llm_services_test.go

@@ -105,7 +105,7 @@ func TestInstancesFunc(t *testing.T) {
 			requestPath:  "/v1/llm-instances/alice",
 			bodyPath:     "",
 			EmbAPIKey:       options.AdminKey,
-			expectBody:   "{\n  \"$schema\": \"http://localhost:8080/schemas/GetUserInstancesResponseBody.json\",\n  \"instances\": [\n    {\n      \"owner\": \"alice\",\n      \"instance_handle\": \"embedding1\",\n      \"instance_id\": 1\n    }\n  ]\n}\n",
+			expectBody:   "{\n  \"$schema\": \"http://localhost:8080/schemas/GetUserInstancesResponseBody.json\",\n  \"instances\": [\n    {\n      \"owner\": \"alice\",\n      \"instance_handle\": \"embedding1\",\n      \"instance_id\": 1,\n      \"number_of_projects\": 0,\n      \"number_of_shared_users\": 0\n    }\n  ]\n}\n",
 			expectStatus: http.StatusOK,
 		},
 		{
@@ -114,7 +114,7 @@ func TestInstancesFunc(t *testing.T) {
 			requestPath:  "/v1/llm-instances/alice",
 			bodyPath:     "",
 			EmbAPIKey:       aliceAPIKey,
-			expectBody:   "{\n  \"$schema\": \"http://localhost:8080/schemas/GetUserInstancesResponseBody.json\",\n  \"instances\": [\n    {\n      \"owner\": \"alice\",\n      \"instance_handle\": \"embedding1\",\n      \"instance_id\": 1\n    }\n  ]\n}\n",
+			expectBody:   "{\n  \"$schema\": \"http://localhost:8080/schemas/GetUserInstancesResponseBody.json\",\n  \"instances\": [\n    {\n      \"owner\": \"alice\",\n      \"instance_handle\": \"embedding1\",\n      \"instance_id\": 1,\n      \"number_of_projects\": 0,\n      \"number_of_shared_users\": 0\n    }\n  ]\n}\n",
 			expectStatus: http.StatusOK,
 		},
 		{