What problem does it solve? Green unit tests and shallow build/lint/typecheck checklists often miss real behavior failures such as prompt injection, stale state, misleading success output, and hung commands. This Skill closes that gap by generating adversarial end-to-end scenarios, diagnosing root causes, and cycling test-fix-retest until the goal is verifiably met. ## Core Features & Use Cases - Adversarial Scenario Matrix: Maintains a structured matrix covering malformed input, prompt injection, cancel/resume, stale state, dirty worktrees, hung commands, flaky tests, and misleading success output. - Test-Diagnose-Fix-Retest Loop: Runs up to 5 bounded cycles with a fresh reviewer subagent for root-cause diagnosis, stopping on success, repeated failure signatures, or safety bounds. - Temporary Harness Generation: Creates throwaway test harnesses and fixtures under a dedicated directory, records every artifact, and cleans them up after verification. - Structured Reporting: Produces a report with commands run, failures found, fixes applied, cleanup status, and residual risks. - Use Case: After implementing a CLI resume feature, invoke UltraQA to verify it handles interrupted runs, stale session files, and injection attempts before shipping. ## Quick Start Ask the agent to run ultraqa against the current changes with a goal such as verifying that the build passes and the new resume behavior survives adversarial end-to-end scenarios.