Migration Validator Skill

SkillDev tools

Validate functional equivalence after migration with side-by-side comparison and behavioral verification

Use Migration Validator Skill in Claude, ChatGPT or Ahel Desktop

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Details

Instructions available. Your AI can read the instructions. Execution depends on the setup they require.

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Add Ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.

Migration Validator SkillStart free

What this skill tells your AI

The instructions your AI receives, as published by a5c-ai/babysitter in library/specializations/code-migration-modernization/skills/migration-validator/SKILL.md and read by Ahel’s review.

Validates functional equivalence between source and target systems after migration through comprehensive comparison and behavioral verification.

Purpose

Enable migration validation for:

Side-by-side comparison
Output diffing
Behavioral verification
Data consistency checking
Acceptance criteria verification

Capabilities

1. Side-by-Side Comparison

Run parallel requests
Compare responses
Track differences
Document discrepancies

2. Output Diffing

Compare API responses
Diff file outputs
Check data formats
Validate transformations

3. Behavioral Verification

Test user flows
Verify business logic
Check edge cases
Validate error handling

4. Data Consistency Checking

Compare data states
Verify calculations
Check relationships
Validate constraints

5. Integration Validation

Test external integrations
Verify API contracts
Check message flows
Validate events

6. Acceptance Criteria Verification

Check feature completeness
Verify requirements
Validate user stories
Document coverage

Tool Integrations

Tool	Purpose	Integration Method
Diffy	Response comparison	API
Contract testing	API verification	CLI
Cypress	E2E validation	CLI
Playwright	Browser testing	CLI
Custom validators	Business rules	CLI

Output Schema

{
  "validationId": "string",
  "timestamp": "ISO8601",
  "source": {
    "environment": "string",
    "version": "string"
  },
  "target": {
    "environment": "string",
    "version": "string"
  },
  "results": {
    "total": "number",
    "passed": "number",
    "failed": "number",
    "skipped": "number"
  },
  "comparisons": [
    {
      "test": "string",
      "status": "passed|failed",
      "source": {},
      "target": {},
      "differences": []
    }
  ],
  "acceptance": {
    "criteria": [],
    "met": "boolean"
  }
}

Integration with Migration Processes

migration-testing-strategy: Validation execution
parallel-run-validation: Parallel comparison

Related Skills

performance-baseline-capturer: Performance comparison
data-migration-validator: Data validation

Related Agents

parallel-run-validator: Parallel validation
regression-detector: Regression detection

Signals

GitHub stars: 2k
Forks: 113
Last commit: Sep 2026

Advanced

Item type: skill
Key: migration-validator
Source: github.com/a5c-ai/babysitter

github.com/a5c-ai/babysitter