What problem does it solve? Green unit tests routinely miss shipped-but-broken features — a RAG feature that works in the backend but is blocked in the UI, or a release-note claim contradicted by the source. This Skill closes that gap by testing GAIA changes across unit, integration, and real-world tiers, driving the actual Agent UI, CLI, MCP, and API surfaces on real AMD Ryzen AI hardware and returning verifiable evidence instead of prose claims. ## Core Features & Use Cases - Multi-tier regression harness: Runs unit tests with pre-existing-failure isolation, integration tests through the real CLI, and a real-world tier that drives the live Agent UI via Playwright or the Agent UI MCP (gaia mcp serve). - Evidence-first verification: Captures screenshots, logs, traces, planted-fact retrieval proof, and per-operation timing, then embeds sanitized screenshots directly in PR descriptions via raw.githubusercontent.com evidence branches. - LLM-behaviour evals: Runs gaia eval agent against a live backend and diffs scorecards against committed baselines to catch regressions from prompt, tool, or model changes. - Use Case: Before merging a PR that changes the Chat agent's UI, the Skill plans the tiers, gets one approval, drives the Agent UI in a real browser on a Ryzen AI machine, injects an unguessable planted fact, and delivers captioned before/after screenshots plus a verdict table on the PR. ## Quick Start Ask the agent to test and validate a GAIA feature or release end-to-end on real hardware with screenshots as proof.