Ac Criteria Validator Skill for Claude

Validate acceptance criteria and feature completion. Use when checking if features pass, validating test results, verifying acceptance criteria, or determining feature completion status.

860 tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

532

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/majiayu000/claude-skill-registry --skill ac-criteria-validator

What comes with it

804 bytes besides the instruction

metadata.json

The instruction itself

13 sections, as written by the author

AC Criteria Validator

Validate acceptance criteria and determine feature completion.

Purpose

Validates that implemented features meet their acceptance criteria, determining when passes can transition from false to true.

Quick Start

from scripts.criteria_validator import CriteriaValidator

validator = CriteriaValidator(project_dir)
result = await validator.validate_feature("auth-001")
print(result.passes)  # True/False
print(result.criteria_results)

Validation Result

{
  "feature_id": "auth-001",
  "passes": true,
  "criteria_results": [
    {
      "criterion": "Valid registration creates user",
      "passed": true,
      "evidence": "test_valid_registration passed",
      "method": "test_execution"
    },
    {
      "criterion": "Invalid email shows error",
      "passed": true,
      "evidence": "test_invalid_email passed",
      "method": "test_execution"
    }
  ],
  "test_summary": {
    "total": 5,
    "passed": 5,
    "failed": 0,
    "coverage": 87.5
  },
  "validated_at": "2024-01-15T10:30:00Z"
}

Validation Methods

Test Execution

Run associated test files
Check all tests pass
Verify coverage threshold
Capture test output

Code Analysis

Check implementation exists
Verify function signatures
Validate error handling
Check documentation

Manual Criteria

UI/UX requirements
Performance benchmarks
Security requirements
Accessibility standards

Validation Rules

validation:
  require_all_tests_pass: true
  minimum_coverage: 80
  require_no_lint_errors: true
  require_type_checks: true

  custom_rules:
    - name: "no_console_logs"
      pattern: "console\\.log"
      severity: "warning"

Workflow

Load: Get feature and criteria
Discover: Find related tests
Execute: Run test suite
Analyze: Check each criterion
Report: Return validation result

State Transition

CRITICAL: passes can ONLY transition false → true

Before validation:
  {"passes": false, "status": "in_progress"}

After successful validation:
  {"passes": true, "status": "completed"}

NEVER:
  {"passes": true} → {"passes": false}

Integration

Input: Feature from ac-state-tracker
Uses: ac-test-generator test files
Output: Validation for state update

API Reference

See scripts/criteria_validator.py for full implementation.

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How to use it

Copy the folder

Take majiayu000/ac-criteria-validator from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.