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Test Gap Finder
by heyhridyansh
Audit implementation behavior against test suites to find critical gaps in edge cases, security, and state transitions.
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See it in action
You say
Analyze the test coverage for this PR diff. I've added a new payment retry logic, but I'm worried about duplicate charges and database timeouts. Here are the implementation and test files.
Your agent does
Verdict: Material test gaps. Score: 65/100. Critical Gap: No test for idempotency when a timeout occurs after a successful charge but before the DB update. Recommendation: Add an integration test simulating a 504 Gateway Timeout post-authorization to verify the idempotency key prevents re-billing.
What you get
About this skill
The problem
High code coverage percentages often mask critical missing tests for edge cases, race conditions, and security boundaries. Developers frequently ship features that pass CI but fail in production due to untested failure paths or tenant isolation leaks.
What it does
- Analyzes code changes and PR diffs against existing test suites to find behavioral gaps.
- Maps implementation logic to a behavior-to-test matrix to identify unprotected state transitions.
- Audits coverage for high-risk areas including concurrency, retries, rollbacks, and cross-tenant permissions.
- Provides a prioritized list of specific test recommendations categorized by severity (Critical to Low).
- Calculates a 100-point test evidence score and issues a release-readiness verdict.
Frameworks & tools
Works with any testing framework including Jest, Vitest, Playwright, Pytest, and JUnit. Compatible with unit, integration, contract, and E2E test suites.
Why this beats prompting it yourself
General LLM prompts often miss subtle infrastructure risks like dead-letter routing or idempotent retries. This skill follows a 24-step audit workflow that forces inspection of boundary conditions and integration assumptions that standard coverage tools ignore.
Use cases
- Reviewing a PR to ensure a bug fix includes a valid regression test.
- Identifying missing permission checks before deploying multi-tenant API changes.
- Finding shallow assertions that provide false confidence without verifying side effects.
- Determining if a complex data migration has sufficient rollback and integrity tests.
Known limitations
Does not execute code or run tests locally. Analysis is based purely on provided implementation files, diffs, and test code.
How to install
Drop the file into your AI Agent. Works with Claude, Cursor, ChatGPT, and 20+ more.
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Creator
17 skills on Agensi
I create practical, AI-ready skills for Cursor, Claude Code, Codex CLI, Replit, and other agents that support the SKILL.md format. My skills focus on specific business and workflow problems, including ecommerce creative audits, design quality checks, prompt and skill validation, content systems, and process automation. Each skill is built with clear inputs, structured outputs, defined permissions, safeguards, and real-world usability.
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