Technical Blueprints Template

Comprehensive templates for creating detailed technical specifications that guide implementation teams from design to deployment. These blueprints serve as the definitive technical reference throughout the development lifecycle.

Blueprint Overview

Technical blueprints bridge the gap between high-level architecture and implementation details, providing:

• Complete API Specifications with request/response examples
• Database Schema Design with migrations and constraints
• Deployment Configuration for all environments
• Integration Specifications for external services
• Security Implementation details and requirements

API Blueprint Template

Complete OpenAPI Specification

# api-blueprint.yml
openapi: 3.0.3
info:
  title: {{PROJECT_NAME}} API
  description: |
    {{PROJECT_DESCRIPTION}}
    
    This API specification provides complete technical details for implementation,
    including request/response schemas, authentication, error handling, and examples.
  version: {{VERSION}}
  contact:
    name: {{TEAM_NAME}}
    email: {{CONTACT_EMAIL}}
    url: {{DOCUMENTATION_URL}}

servers:
  - url: {{PRODUCTION_URL}}
    description: Production server
  - url: {{STAGING_URL}}
    description: Staging server
  - url: {{DEVELOPMENT_URL}}
    description: Development server

paths:
  /{{RESOURCE_COLLECTION}}:
    get:
      summary: List {{RESOURCE_NAME}} items
      description: |
        Retrieve a paginated list of {{RESOURCE_NAME}} items with optional filtering.
        
        **Performance Considerations:**
        - Maximum 100 items per request
        - Response cached for 5 minutes
        - Includes ETag for conditional requests
        
        **Business Rules:**
        - {{BUSINESS_RULE_1}}
        - {{BUSINESS_RULE_2}}
      
      tags: [{{RESOURCE_TAG}}]
      parameters:
        - $ref: '#/components/parameters/PageParam'
        - $ref: '#/components/parameters/LimitParam'
        - name: filter
          in: query
          description: Filter criteria
          schema:
            type: object
            properties:
              status:
                type: string
                enum: [{{STATUS_VALUES}}]
              createdAfter:
                type: string
                format: date-time
              search:
                type: string
                maxLength: 100
      
      responses:
        '200':
          description: Successfully retrieved items
          headers:
            X-Total-Count:
              description: Total number of items
              schema:
                type: integer
            ETag:
              description: Resource version for caching
              schema:
                type: string
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/{{RESOURCE_NAME}}ListResponse'
        '400':
          $ref: '#/components/responses/ValidationError'
        '401':
          $ref: '#/components/responses/UnauthorizedError'
        '500':
          $ref: '#/components/responses/InternalServerError'

    post:
      summary: Create new {{RESOURCE_NAME}}
      description: |
        Create a new {{RESOURCE_NAME}} with validation and business rule enforcement.
        
        **Validation Rules:**
        - {{VALIDATION_RULE_1}}
        - {{VALIDATION_RULE_2}}
        
        **Side Effects:**
        - {{SIDE_EFFECT_1}}
        - {{SIDE_EFFECT_2}}
      
      tags: [{{RESOURCE_TAG}}]
      security:
        - BearerAuth: [{{REQUIRED_SCOPE}}]
      
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Create{{RESOURCE_NAME}}Request'
            examples:
              standard:
                summary: Standard creation request
                value:
                  {{EXAMPLE_CREATE_REQUEST}}
              with_options:
                summary: Creation with optional fields
                value:
                  {{EXAMPLE_WITH_OPTIONS}}
      
      responses:
        '201':
          description: {{RESOURCE_NAME}} created successfully
          headers:
            Location:
              description: URL of created resource
              schema:
                type: string
                format: uri
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/{{RESOURCE_NAME}}Response'
        '400':
          $ref: '#/components/responses/ValidationError'
        '401':
          $ref: '#/components/responses/UnauthorizedError'
        '403':
          $ref: '#/components/responses/ForbiddenError'
        '409':
          description: Conflict - resource already exists
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ConflictError'
        '500':
          $ref: '#/components/responses/InternalServerError'

components:
  schemas:
    {{RESOURCE_NAME}}:
      type: object
      description: {{RESOURCE_DESCRIPTION}}
      properties:
        id:
          type: string
          format: uuid
          description: Unique identifier
          readOnly: true
          example: "{{EXAMPLE_ID}}"
        
        # Add resource-specific properties
        {{PROPERTY_NAME}}:
          type: {{PROPERTY_TYPE}}
          description: {{PROPERTY_DESCRIPTION}}
          {{PROPERTY_CONSTRAINTS}}
          example: {{PROPERTY_EXAMPLE}}
        
        # Audit fields
        createdAt:
          type: string
          format: date-time
          description: Creation timestamp
          readOnly: true
        updatedAt:
          type: string
          format: date-time
          description: Last update timestamp  
          readOnly: true
        version:
          type: integer
          description: Version number for optimistic locking
          readOnly: true
      
      required: [{{REQUIRED_FIELDS}}]

  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: |
        JWT token authentication. Include the token in the Authorization header:
        `Authorization: Bearer <token>`
        
        **Token Requirements:**
        - Valid signature from {{TOKEN_ISSUER}}
        - Not expired (check 'exp' claim)
        - Contains required scopes in 'scope' claim
        - User must be active (check 'active' claim)

  parameters:
    PageParam:
      name: page
      in: query
      description: Page number (1-based)
      required: false
      schema:
        type: integer
        minimum: 1
        maximum: 1000
        default: 1
    
    LimitParam:
      name: limit
      in: query
      description: Items per page
      required: false
      schema:
        type: integer
        minimum: 1
        maximum: 100
        default: 20

Database Blueprint Template

Schema Definition with Migrations

-- database-blueprint.sql
-- {{PROJECT_NAME}} Database Schema v{{VERSION}}
-- Generated: {{GENERATION_DATE}}

-- Enable extensions
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
CREATE EXTENSION IF NOT EXISTS "pgcrypto";

-- Create custom types
CREATE TYPE {{RESOURCE_NAME}}_status AS ENUM (
    {{STATUS_VALUE_1}},
    {{STATUS_VALUE_2}},
    {{STATUS_VALUE_3}}
);

-- Main resource table
CREATE TABLE {{RESOURCE_TABLE_NAME}} (
    -- Primary key
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    
    -- Core fields
    {{FIELD_NAME}} {{FIELD_TYPE}} {{FIELD_CONSTRAINTS}},
    
    -- Status and metadata
    status {{RESOURCE_NAME}}_status NOT NULL DEFAULT '{{DEFAULT_STATUS}}',
    
    -- Audit fields
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    created_by UUID NOT NULL,
    updated_by UUID NOT NULL,
    version INTEGER NOT NULL DEFAULT 1,
    
    -- Constraints
    CONSTRAINT {{RESOURCE_NAME}}_{{CONSTRAINT_NAME}} {{CONSTRAINT_DEFINITION}},
    
    -- Foreign keys
    CONSTRAINT fk_{{RESOURCE_NAME}}_{{FOREIGN_TABLE}} 
        FOREIGN KEY ({{FOREIGN_KEY}}) 
        REFERENCES {{FOREIGN_TABLE}}(id) 
        ON DELETE {{DELETE_ACTION}}
);

-- Indexes for performance
CREATE INDEX idx_{{RESOURCE_NAME}}_status ON {{RESOURCE_TABLE_NAME}}(status);
CREATE INDEX idx_{{RESOURCE_NAME}}_created_at ON {{RESOURCE_TABLE_NAME}}(created_at);
CREATE INDEX idx_{{RESOURCE_NAME}}_{{SEARCH_FIELD}} ON {{RESOURCE_TABLE_NAME}}({{SEARCH_FIELD}});

-- Composite index for common queries
CREATE INDEX idx_{{RESOURCE_NAME}}_status_created 
    ON {{RESOURCE_TABLE_NAME}}(status, created_at DESC);

-- Updated trigger for automatic timestamp updates
CREATE OR REPLACE FUNCTION update_updated_at_column()
RETURNS TRIGGER AS $$
BEGIN
    NEW.updated_at = NOW();
    NEW.version = OLD.version + 1;
    RETURN NEW;
END;
$$ language 'plpgsql';

CREATE TRIGGER update_{{RESOURCE_NAME}}_updated_at 
    BEFORE UPDATE ON {{RESOURCE_TABLE_NAME}}
    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();

-- Row Level Security (if needed)
ALTER TABLE {{RESOURCE_TABLE_NAME}} ENABLE ROW LEVEL SECURITY;

CREATE POLICY {{RESOURCE_NAME}}_isolation_policy ON {{RESOURCE_TABLE_NAME}}
    USING ({{RLS_CONDITION}});

-- Sample data for development
INSERT INTO {{RESOURCE_TABLE_NAME}} ({{SAMPLE_FIELDS}}) VALUES
    ({{SAMPLE_VALUES_1}}),
    ({{SAMPLE_VALUES_2}}),
    ({{SAMPLE_VALUES_3}});

Migration Scripts

-- migrations/001_initial_schema.sql
-- Initial database schema creation

-- migrations/002_add_{{FEATURE}}_support.sql
-- Add support for {{FEATURE}} functionality
ALTER TABLE {{RESOURCE_TABLE_NAME}} 
    ADD COLUMN {{NEW_COLUMN}} {{COLUMN_TYPE}} {{COLUMN_CONSTRAINTS}};

-- Update existing data
UPDATE {{RESOURCE_TABLE_NAME}} 
    SET {{NEW_COLUMN}} = {{DEFAULT_VALUE}}
    WHERE {{CONDITION}};

-- migrations/003_optimize_queries.sql  
-- Add indexes for improved query performance
CREATE INDEX CONCURRENTLY idx_{{RESOURCE_NAME}}_{{OPTIMIZATION}}
    ON {{RESOURCE_TABLE_NAME}}({{INDEX_COLUMNS}});

-- migrations/rollback/003_rollback_optimize_queries.sql
-- Rollback query optimizations
DROP INDEX IF EXISTS idx_{{RESOURCE_NAME}}_{{OPTIMIZATION}};

Infrastructure Blueprint Template

Container Configuration

# docker-compose.blueprint.yml
version: '3.8'

services:
  {{SERVICE_NAME}}:
    build:
      context: .
      dockerfile: Dockerfile
      args:
        NODE_ENV: {{ENVIRONMENT}}
    
    image: {{IMAGE_NAME}}:{{IMAGE_TAG}}
    
    container_name: {{CONTAINER_NAME}}
    
    ports:
      - "{{HOST_PORT}}:{{CONTAINER_PORT}}"
    
    environment:
      # Application configuration
      NODE_ENV: {{ENVIRONMENT}}
      PORT: {{CONTAINER_PORT}}
      
      # Database configuration
      DATABASE_URL: postgresql://{{DB_USER}}:{{DB_PASSWORD}}@{{DB_HOST}}:{{DB_PORT}}/{{DB_NAME}}
      DATABASE_POOL_SIZE: {{DB_POOL_SIZE}}
      
      # Redis configuration
      REDIS_URL: redis://{{REDIS_HOST}}:{{REDIS_PORT}}
      REDIS_PASSWORD: {{REDIS_PASSWORD}}
      
      # JWT configuration
      JWT_SECRET: {{JWT_SECRET}}
      JWT_EXPIRATION: {{JWT_EXPIRATION}}
      
      # External service configuration
      {{EXTERNAL_SERVICE}}_URL: {{EXTERNAL_URL}}
      {{EXTERNAL_SERVICE}}_API_KEY: {{EXTERNAL_API_KEY}}
      
      # Monitoring configuration
      LOG_LEVEL: {{LOG_LEVEL}}
      METRICS_ENABLED: {{METRICS_ENABLED}}
    
    volumes:
      - {{HOST_VOLUME}}:{{CONTAINER_VOLUME}}
      - logs:/app/logs
    
    networks:
      - {{NETWORK_NAME}}
    
    depends_on:
      - database
      - redis
    
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:{{CONTAINER_PORT}}/health"]
      interval: 30s
      timeout: 10s
      retries: 3
      start_period: 40s
    
    restart: unless-stopped
    
    deploy:
      resources:
        limits:
          cpus: '{{CPU_LIMIT}}'
          memory: {{MEMORY_LIMIT}}
        reservations:
          cpus: '{{CPU_RESERVATION}}'
          memory: {{MEMORY_RESERVATION}}

  database:
    image: postgres:{{POSTGRES_VERSION}}
    
    container_name: {{PROJECT_NAME}}_postgres
    
    environment:
      POSTGRES_DB: {{DB_NAME}}
      POSTGRES_USER: {{DB_USER}}
      POSTGRES_PASSWORD: {{DB_PASSWORD}}
    
    volumes:
      - postgres_data:/var/lib/postgresql/data
      - ./database/init:/docker-entrypoint-initdb.d
    
    ports:
      - "{{DB_HOST_PORT}}:5432"
    
    networks:
      - {{NETWORK_NAME}}

  redis:
    image: redis:{{REDIS_VERSION}}-alpine
    
    container_name: {{PROJECT_NAME}}_redis
    
    command: redis-server --requirepass {{REDIS_PASSWORD}}
    
    volumes:
      - redis_data:/data
    
    ports:
      - "{{REDIS_HOST_PORT}}:6379"
    
    networks:
      - {{NETWORK_NAME}}

volumes:
  postgres_data:
    driver: local
  redis_data:
    driver: local
  logs:
    driver: local

networks:
  {{NETWORK_NAME}}:
    driver: bridge

Kubernetes Deployment

# kubernetes/deployment.blueprint.yml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{SERVICE_NAME}}
  namespace: {{NAMESPACE}}
  labels:
    app: {{SERVICE_NAME}}
    version: {{VERSION}}
    environment: {{ENVIRONMENT}}

spec:
  replicas: {{REPLICA_COUNT}}
  
  selector:
    matchLabels:
      app: {{SERVICE_NAME}}
  
  template:
    metadata:
      labels:
        app: {{SERVICE_NAME}}
        version: {{VERSION}}
    
    spec:
      containers:
      - name: {{SERVICE_NAME}}
        image: {{IMAGE_REGISTRY}}/{{IMAGE_NAME}}:{{IMAGE_TAG}}
        
        ports:
        - containerPort: {{CONTAINER_PORT}}
          name: http
        
        env:
        - name: NODE_ENV
          value: "{{ENVIRONMENT}}"
        - name: PORT
          value: "{{CONTAINER_PORT}}"
        - name: DATABASE_URL
          valueFrom:
            secretKeyRef:
              name: {{SERVICE_NAME}}-secrets
              key: database-url
        - name: JWT_SECRET
          valueFrom:
            secretKeyRef:
              name: {{SERVICE_NAME}}-secrets
              key: jwt-secret
        
        resources:
          requests:
            memory: "{{MEMORY_REQUEST}}"
            cpu: "{{CPU_REQUEST}}"
          limits:
            memory: "{{MEMORY_LIMIT}}"
            cpu: "{{CPU_LIMIT}}"
        
        livenessProbe:
          httpGet:
            path: /health
            port: http
          initialDelaySeconds: 30
          periodSeconds: 10
        
        readinessProbe:
          httpGet:
            path: /ready
            port: http
          initialDelaySeconds: 5
          periodSeconds: 5

---
apiVersion: v1
kind: Service
metadata:
  name: {{SERVICE_NAME}}-service
  namespace: {{NAMESPACE}}
  labels:
    app: {{SERVICE_NAME}}

spec:
  selector:
    app: {{SERVICE_NAME}}
  
  ports:
  - name: http
    port: 80
    targetPort: {{CONTAINER_PORT}}
    protocol: TCP
  
  type: ClusterIP

Security Blueprint Template

Authentication & Authorization

// security-blueprint.ts

/**
 * Authentication Configuration
 */
export interface AuthConfig {
  jwtSecret: string;
  jwtExpiration: number;
  refreshTokenExpiration: number;
  passwordMinLength: number;
  passwordRequireSpecialChars: boolean;
  maxLoginAttempts: number;
  lockoutDuration: number;
}

/**
 * Authorization Roles and Permissions
 */
export enum UserRole {
  ADMIN = 'admin',
  MODERATOR = 'moderator', 
  USER = 'user',
  GUEST = 'guest'
}

export enum Permission {
  // {{RESOURCE_NAME}} permissions
  {{RESOURCE_NAME}}_READ = '{{resource_name}}:read',
  {{RESOURCE_NAME}}_WRITE = '{{resource_name}}:write',
  {{RESOURCE_NAME}}_DELETE = '{{resource_name}}:delete',
  
  // Admin permissions
  ADMIN_USERS = 'admin:users',
  ADMIN_SYSTEM = 'admin:system',
}

/**
 * Role-Permission Matrix
 */
export const ROLE_PERMISSIONS: Record<UserRole, Permission[]> = {
  [UserRole.ADMIN]: [
    // Admins have all permissions
    ...Object.values(Permission)
  ],
  
  [UserRole.MODERATOR]: [
    Permission.{{RESOURCE_NAME}}_READ,
    Permission.{{RESOURCE_NAME}}_WRITE,
    Permission.ADMIN_USERS,
  ],
  
  [UserRole.USER]: [
    Permission.{{RESOURCE_NAME}}_READ,
    Permission.{{RESOURCE_NAME}}_WRITE, // Only own resources
  ],
  
  [UserRole.GUEST]: [
    Permission.{{RESOURCE_NAME}}_READ, // Public resources only
  ]
};

/**
 * Security Middleware Configuration
 */
export interface SecurityMiddlewareConfig {
  cors: {
    origin: string[];
    credentials: boolean;
    maxAge: number;
  };
  
  rateLimit: {
    windowMs: number;
    max: number;
    skipSuccessfulRequests: boolean;
  };
  
  helmet: {
    contentSecurityPolicy: boolean;
    hsts: boolean;
    noSniff: boolean;
    frameguard: boolean;
  };
  
  validation: {
    abortEarly: boolean;
    stripUnknown: boolean;
    forbidUnknownValues: boolean;
  };
}

/**
 * Data Encryption Configuration
 */
export interface EncryptionConfig {
  algorithm: string;
  keyLength: number;
  ivLength: number;
  saltLength: number;
  iterations: number;
  
  // Field-level encryption for sensitive data
  encryptedFields: {
    [tableName: string]: string[];
  };
}

Integration Blueprint Template

External Service Integration

// integration-blueprint.ts

/**
 * External Service Configuration
 */
export interface {{SERVICE_NAME}}Config {
  baseUrl: string;
  apiKey: string;
  timeout: number;
  retryAttempts: number;
  retryDelay: number;
  
  // Circuit breaker configuration
  circuitBreaker: {
    failureThreshold: number;
    resetTimeout: number;
    monitoringPeriod: number;
  };
}

/**
 * {{SERVICE_NAME}} Integration Client
 */
export class {{SERVICE_NAME}}Client {
  private config: {{SERVICE_NAME}}Config;
  private httpClient: HttpClient;
  private circuitBreaker: CircuitBreaker;
  
  constructor(config: {{SERVICE_NAME}}Config) {
    this.config = config;
    this.httpClient = new HttpClient({
      baseURL: config.baseUrl,
      timeout: config.timeout,
      headers: {
        'Authorization': `Bearer ${config.apiKey}`,
        'Content-Type': 'application/json',
        'User-Agent': '{{PROJECT_NAME}}/{{VERSION}}'
      }
    });
    
    this.circuitBreaker = new CircuitBreaker(
      this.makeRequest.bind(this),
      config.circuitBreaker
    );
  }
  
  /**
   * {{OPERATION_NAME}}
   */
  async {{operationName}}(
    request: {{OPERATION_REQUEST_TYPE}}
  ): Promise<{{OPERATION_RESPONSE_TYPE}}> {
    try {
      const response = await this.circuitBreaker.execute(async () => {
        return await this.httpClient.post('/{{ENDPOINT}}', request);
      });
      
      return this.transformResponse(response.data);
    } catch (error) {
      throw new {{SERVICE_NAME}}Error(
        `{{OPERATION_NAME}} failed: ${error.message}`,
        error
      );
    }
  }
  
  private async makeRequest(url: string, options: RequestOptions) {
    // Implementation with retry logic
    let lastError: Error;
    
    for (let attempt = 1; attempt <= this.config.retryAttempts; attempt++) {
      try {
        return await this.httpClient.request(url, options);
      } catch (error) {
        lastError = error;
        
        if (attempt < this.config.retryAttempts && this.isRetryableError(error)) {
          await this.delay(this.config.retryDelay * attempt);
          continue;
        }
        
        throw error;
      }
    }
    
    throw lastError;
  }
  
  private isRetryableError(error: Error): boolean {
    // Define which errors should trigger retries
    return error.name === 'TimeoutError' || 
           error.name === 'NetworkError' ||
           (error as any).status >= 500;
  }
  
  private async delay(ms: number): Promise<void> {
    return new Promise(resolve => setTimeout(resolve, ms));
  }
}

/**
 * Integration Event Handlers
 */
export interface IntegrationEventHandlers {
  on{{EVENT_NAME}}(data: {{EVENT_DATA_TYPE}}): Promise<void>;
  on{{SERVICE_NAME}}Failure(error: Error): Promise<void>;
  on{{SERVICE_NAME}}Recovery(): Promise<void>;
}

Configuration Blueprint Template

Environment-Specific Configuration

// config/blueprint.ts

interface AppConfig {
  server: {
    port: number;
    host: string;
    cors: {
      origin: string[];
      credentials: boolean;
    };
  };
  
  database: {
    url: string;
    pool: {
      min: number;
      max: number;
      idleTimeoutMillis: number;
    };
    migrations: {
      directory: string;
      tableName: string;
    };
  };
  
  redis: {
    url: string;
    keyPrefix: string;
    ttl: number;
  };
  
  auth: {
    jwtSecret: string;
    jwtExpiration: string;
    refreshTokenExpiration: string;
    bcryptRounds: number;
  };
  
  logging: {
    level: string;
    format: string;
    transports: string[];
  };
  
  monitoring: {
    metricsEnabled: boolean;
    healthCheckInterval: number;
    alerting: {
      enabled: boolean;
      webhookUrl?: string;
    };
  };
  
  externalServices: {
    {{SERVICE_NAME}}: {{SERVICE_NAME}}Config;
  };
}

// Environment-specific configurations
export const configs: Record<string, AppConfig> = {
  development: {
    server: {
      port: Number(process.env.PORT) || 3000,
      host: process.env.HOST || 'localhost',
      cors: {
        origin: ['http://localhost:3001'],
        credentials: true
      }
    },
    // ... other development config
  },
  
  staging: {
    server: {
      port: Number(process.env.PORT) || 8080,
      host: process.env.HOST || '0.0.0.0',
      cors: {
        origin: process.env.CORS_ORIGINS?.split(',') || [],
        credentials: true
      }
    },
    // ... other staging config  
  },
  
  production: {
    server: {
      port: Number(process.env.PORT) || 8080,
      host: process.env.HOST || '0.0.0.0',
      cors: {
        origin: process.env.CORS_ORIGINS?.split(',') || [],
        credentials: true
      }
    },
    // ... other production config
  }
};

Testing Blueprint Template

Test Suite Structure

// tests/blueprint.test.ts

describe('{{RESOURCE_NAME}} API', () => {
  let app: Application;
  let database: Database;
  let testData: TestDataBuilder;
  
  beforeAll(async () => {
    // Setup test environment
    app = await createTestApp();
    database = await createTestDatabase();
    testData = new TestDataBuilder(database);
  });
  
  afterAll(async () => {
    // Cleanup
    await database.close();
  });
  
  beforeEach(async () => {
    // Reset database state
    await database.clearAll();
    await testData.seedBasicData();
  });
  
  describe('{{OPERATION_NAME}}', () => {
    it('should {{SUCCESS_SCENARIO}}', async () => {
      // Arrange
      const {{ENTITY}} = await testData.create{{ENTITY}}({{TEST_DATA}});
      const authToken = await testData.generateAuthToken({{ENTITY}}.userId);
      
      // Act
      const response = await request(app)
        .{{HTTP_METHOD}}('{{ENDPOINT}}')
        .set('Authorization', `Bearer ${authToken}`)
        .send({{REQUEST_BODY}})
        .expect({{SUCCESS_STATUS}});
      
      // Assert
      expect(response.body).toMatchObject({
        {{EXPECTED_RESPONSE_FIELDS}}
      });
      
      // Verify side effects
      const {{VERIFICATION_ENTITY}} = await database.findById({{ID}});
      expect({{VERIFICATION_ENTITY}}).toBeDefined();
      expect({{VERIFICATION_ENTITY}}.{{FIELD}}).toBe({{EXPECTED_VALUE}});
    });
    
    it('should {{ERROR_SCENARIO}}', async () => {
      // Arrange
      const {{INVALID_DATA}} = {{INVALID_TEST_DATA}};
      
      // Act & Assert
      const response = await request(app)
        .{{HTTP_METHOD}}('{{ENDPOINT}}')
        .send({{INVALID_DATA}})
        .expect({{ERROR_STATUS}});
      
      expect(response.body.error).toMatchObject({
        code: '{{ERROR_CODE}}',
        message: expect.stringContaining('{{ERROR_MESSAGE}}')
      });
    });
  });
});

---

These technical blueprints provide comprehensive templates for creating detailed technical specifications that guide development teams from initial design through production deployment. Each template includes placeholders for project-specific customization while maintaining consistency and completeness across all technical domains.