TRD (Technical Requirements Document)¶
The TRD specifies how to build the product defined in the PRD.
Purpose¶
A TRD answers:
- What is the system architecture?
- How will components communicate?
- What are the API specifications?
- How will security be implemented?
- What infrastructure is required?
Structure¶
graph TD
TRD[TRD Document]
TRD --> M[Metadata]
TRD --> A[Architecture]
TRD --> API[API Specs]
TRD --> S[Security]
TRD --> I[Infrastructure]
TRD --> INT[Integrations]
A --> O[Overview]
A --> C[Components]
A --> D[Data Flow]
S --> AU[Authentication]
S --> AZ[Authorization]
S --> E[Encryption]Core Sections¶
Architecture Overview¶
type Architecture struct {
Overview string `json:"overview"`
Diagram string `json:"diagram,omitempty"` // URL or base64
Components []Component `json:"components"`
DataFlow []DataFlow `json:"data_flow,omitempty"`
Patterns []string `json:"patterns,omitempty"` // e.g., "microservices", "event-driven"
Constraints []string `json:"constraints,omitempty"`
}
type Component struct {
ID string `json:"id"`
Name string `json:"name"`
Type string `json:"type"` // Service, Database, Queue, etc.
Description string `json:"description"`
Technology string `json:"technology"`
Dependencies []string `json:"dependencies,omitempty"`
Owner string `json:"owner,omitempty"`
}
API Specifications¶
type APISpec struct {
ID string `json:"id"`
Name string `json:"name"`
Version string `json:"version"`
Type string `json:"type"` // REST, GraphQL, gRPC
BaseURL string `json:"base_url,omitempty"`
Endpoints []Endpoint `json:"endpoints"`
Auth string `json:"auth"` // OAuth2, API Key, JWT
RateLimit string `json:"rate_limit,omitempty"`
}
type Endpoint struct {
Method string `json:"method"`
Path string `json:"path"`
Description string `json:"description"`
Request *RequestSpec `json:"request,omitempty"`
Response *ResponseSpec `json:"response,omitempty"`
Errors []ErrorSpec `json:"errors,omitempty"`
}
Security Requirements¶
type Security struct {
Authentication AuthConfig `json:"authentication"`
Authorization AuthzConfig `json:"authorization"`
Encryption EncryptionSpec `json:"encryption"`
Compliance []string `json:"compliance,omitempty"` // GDPR, SOC2, HIPAA
Vulnerabilities []string `json:"vulnerabilities,omitempty"`
Audit *AuditSpec `json:"audit,omitempty"`
}
type AuthConfig struct {
Method string `json:"method"` // OAuth2, SAML, OIDC
Providers []string `json:"providers"`
MFA bool `json:"mfa"`
SessionTTL string `json:"session_ttl"`
}
type EncryptionSpec struct {
AtRest string `json:"at_rest"` // AES-256
InTransit string `json:"in_transit"` // TLS 1.3
KeyManagement string `json:"key_management,omitempty"`
}
Infrastructure¶
type Infrastructure struct {
Cloud string `json:"cloud"` // AWS, GCP, Azure
Regions []string `json:"regions"`
Compute []ComputeSpec `json:"compute"`
Storage []StorageSpec `json:"storage"`
Networking NetworkSpec `json:"networking"`
Scaling ScalingSpec `json:"scaling"`
Monitoring MonitoringSpec `json:"monitoring"`
}
type ScalingSpec struct {
Type string `json:"type"` // Horizontal, Vertical
MinInstances int `json:"min_instances"`
MaxInstances int `json:"max_instances"`
Triggers []string `json:"triggers"`
}
Integrations¶
type Integration struct {
ID string `json:"id"`
Name string `json:"name"`
Type string `json:"type"` // API, Webhook, Queue, File
Direction string `json:"direction"` // Inbound, Outbound, Bidirectional
Protocol string `json:"protocol"`
DataFormat string `json:"data_format"` // JSON, XML, Protobuf
Frequency string `json:"frequency,omitempty"`
SLA string `json:"sla,omitempty"`
}
Creating a TRD¶
import "github.com/grokify/structured-plan/trd"
doc := &trd.Document{
Metadata: trd.Metadata{
ID: "TRD-2025-001",
Title: "Customer Portal Technical Design",
Version: "1.0.0",
Status: trd.StatusDraft,
PRDRef: "PRD-2025-001", // Link to parent PRD
},
Architecture: trd.Architecture{
Overview: "Microservices architecture with React frontend",
Patterns: []string{"microservices", "event-driven", "CQRS"},
Components: []trd.Component{
{
ID: "api-gateway",
Name: "API Gateway",
Type: "Service",
Technology: "Kong",
},
{
ID: "user-service",
Name: "User Service",
Type: "Service",
Technology: "Go",
},
},
},
APISpecs: []trd.APISpec{
{
ID: "user-api",
Name: "User API",
Version: "v1",
Type: "REST",
Auth: "OAuth2",
Endpoints: []trd.Endpoint{
{
Method: "GET",
Path: "/users/{id}",
Description: "Get user by ID",
},
},
},
},
Security: trd.Security{
Authentication: trd.AuthConfig{
Method: "OAuth2",
Providers: []string{"Google", "Microsoft"},
MFA: true,
},
Encryption: trd.EncryptionSpec{
AtRest: "AES-256",
InTransit: "TLS 1.3",
},
Compliance: []string{"SOC2", "GDPR"},
},
}
trd.Save(doc, "portal-trd.trd.json")
Validation¶
result := trd.Validate(doc)
if !result.Valid {
for _, err := range result.Errors {
fmt.Printf("Error: %s\n", err.Message)
}
}
JSON Example¶
{
"metadata": {
"id": "TRD-2025-001",
"title": "Customer Portal Technical Design",
"version": "1.0.0",
"prd_ref": "PRD-2025-001"
},
"architecture": {
"overview": "Microservices architecture with React frontend",
"patterns": ["microservices", "event-driven"],
"components": [
{
"id": "api-gateway",
"name": "API Gateway",
"type": "Service",
"technology": "Kong"
}
]
},
"api_specs": [
{
"id": "user-api",
"name": "User API",
"type": "REST",
"auth": "OAuth2",
"endpoints": [
{"method": "GET", "path": "/users/{id}"}
]
}
],
"security": {
"authentication": {
"method": "OAuth2",
"mfa": true
},
"encryption": {
"at_rest": "AES-256",
"in_transit": "TLS 1.3"
},
"compliance": ["SOC2", "GDPR"]
},
"infrastructure": {
"cloud": "AWS",
"regions": ["us-east-1", "eu-west-1"]
}
}
PRD to TRD Flow¶
| PRD Section | TRD Section |
|---|---|
| Functional Requirements | API Endpoints |
| Non-Functional (Performance) | Scaling, Infrastructure |
| Non-Functional (Security) | Security Config |
| Non-Functional (Compliance) | Compliance Requirements |
| Technical Architecture | Architecture Components |