validate-interface

Validate that Controllers and DTO interfaces match the requirements specification. This skill only checks for discrepancies - it does NOT modify any files.

Purpose

Compare requirements documents with interface definitions and report:

• ✅ Matching items
• ❌ Mismatching items (needs fix)
• ⚠️ Items requiring review

Workflow

┌─────────────────────────────────────┐
│  Step 1: Read Requirements          │
│  /docs/analysis/*.md                │
└───────────────┬─────────────────────┘
                │
                ▼
┌─────────────────────────────────────┐
│  Step 2: Read Prisma Schema         │
│  /prisma/schema/*.prisma            │
└───────────────┬─────────────────────┘
                │
                ▼
┌─────────────────────────────────────┐
│  Step 3: Read Interfaces & Controllers│
│  /src/api/structures/               │
│  /src/controllers/                  │
└───────────────┬─────────────────────┘
                │
                ▼
┌─────────────────────────────────────┐
│  Step 4: Compare & Report           │
│  - Missing APIs                     │
│  - Empty interfaces                 │
│  - Type mismatches                  │
│  - Missing DTOs                     │
└─────────────────────────────────────┘

---

Step 1: Read Requirements

find docs/analysis -name "*.md" -type f

Extract required APIs:

• HTTP methods (GET, POST, PATCH, PUT, DELETE)
• URL paths
• Request/response structures
• Authentication requirements

---

Step 2: Read Prisma Schema

find prisma/schema -name "*.prisma" -type f

Understand data model for DTO validation.

---

Step 3: Read Current Implementation

# Controllers
find src/controllers -name "*Controller.ts" -type f

# Interfaces
find src/api/structures -name "I*.ts" -type f

---

Step 4: Validation Checks

4.1 API Coverage

For each required API:

• ✅ Controller method exists
• ❌ API missing

4.2 Interface Completeness

For each interface file:

• ✅ All properties defined
• ❌ Empty interface {}
• ❌ Missing ICreate/IUpdate/ISummary

4.3 Type Alignment with Prisma

For each DTO property:

• ✅ Type matches Prisma field
• ❌ Type mismatch
• ❌ Missing nullable annotation
• ⚠️ Missing typia tags

4.4 Controller Structure

• ✅ Proper decorators (@TypedRoute, @TypedBody)
• ❌ Missing authentication decorator
• ⚠️ Inconsistent naming

4.5 Path Naming

Check for redundant path segments where the same word repeats:

• ❌ /{word}/{word}s - e.g., /admin/admins, /user/users
• ❌ /{word}/{word}-* - e.g., /item/item-details
• ❌ /{prefix}/{prefix}-* - prefix repeated in resource path

Fix by removing redundant segment:

• ✅ /{word}s - e.g., /admins, /users
• ✅ /{prefix}/{resources} - no repetition

---

Output Format

# Validation Report: Interfaces

## Summary
- Required APIs: X
- Implemented APIs: Y
- Missing APIs: Z
- Empty interfaces: W

## ✅ Valid Items
- [Controller] `AdminEntitiesController` - All methods present
- [Interface] `IEntity` - Properly defined

## ❌ Issues Found
- [Missing API] `DELETE /admin/entities/:id` - Not implemented
- [Empty Interface] `IEntity.ICreate` - No properties defined
- [Type Mismatch] `IEntity.status` - Expected union type, found string

## ⚠️ Warnings
- [Missing Tag] `IEntity.id` - Should have `tags.Format<"uuid">`
- [Nullable] `IEntity.deleted_at` - Should be `(string & tags.Format<"date-time">) | null`
- [Path Naming] `/{word}/{word}s` pattern detected - Redundant path segment, remove duplication

## Recommendation
Run `/fix-interface` to fix the issues above.

---

Important

This skill is READ-ONLY.

• Does NOT modify any files
• Does NOT run any build commands
• Only reports discrepancies

To fix issues, use /fix-interface skill.