validation-gap-filling

Generate missing unit, integration, and end-to-end tests from code and UAT criteria.

9|1|Updated Feb 1, 2026
One-click install
npx skills add https://github.com/calcosmic/Aether --skill validation-gap-filling
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: validation-gap-filling
Source: https://github.com/calcosmic/Aether/tree/main/.aether/skills-codex/colony/validation-gap-filling
Command: npx skills add https://github.com/calcosmic/Aether --skill validation-gap-filling

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill helps teams identify where tests are missing after implementation and automatically generates targeted unit, integration, and E2E tests to close those gaps, improving reliability without slowing delivery.

Core Features & Use Cases

  • Gap analysis between implemented code and existing tests to reveal coverage holes.
  • Automated generation of unit tests for functions, modules, and interfaces.
  • Automated generation of integration and end-to-end tests aligned with UAT criteria across phases.
  • Fits into existing repos by mirroring project patterns and test conventions to ensure seamless adoption.
  • Use case: after a new feature, run the gap filler to produce a comprehensive test suite that validates behavior and guardrails.

Quick Start

Run the Gap Filler to inspect phase plans, identify untested areas, and auto-generate a suite of unit, integration, and E2E tests.

Frequently Asked Questions about validation-gap-filling

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I automatically generate missing tests for untested code?

You can fill validation gaps by running this skill to inspect phase plans and identify untested areas. It auto-generates a comprehensive test suite of unit, integration, and end-to-end tests that validates behavior and guardrails without slowing delivery.

What's the best way to analyze test coverage gaps and create E2E tests?

Analyzing test coverage gaps is best handled by comparing implemented code against existing tests to reveal coverage holes. This approach automatically generates integration and end-to-end tests aligned with UAT criteria across your project's development phases.

Can I generate unit tests that match my existing repository test conventions?

Yes, you can generate unit tests that match your repository conventions. The skill mirrors existing project patterns and test framework conventions to ensure seamless adoption, applying consistent naming and deterministic test requirements.

Does automated test generation work across multiple languages and test frameworks?

Automated test generation operates across multiple languages and test frameworks by mirroring your repository's existing patterns. It ensures compatibility with your current setup while satisfying requirements for deterministic tests and proper isolation.

When do I need to run automated gap filling for software test coverage?

You need to run automated gap filling when your software project phases have implementation but insufficient tests. It is particularly useful after completing a new feature to produce a comprehensive test suite that validates behavior and guardrails.