Produces a structured architecture-decision analysis — ≥3 genuinely distinct options scored against weighted quality attributes, with mermaid visuals, a reversibility-calibrated recommendation, and an ADR in the project's own format. Use when asked to compare architectural options, choose between data models / deploy strategies / frameworks, weigh a build-vs-buy or rewrite-vs-refactor call, or make any non-trivial design decision where structured alternatives beat a single opinion. Do not trigger for: implementing an already-decided design, code review of a diff, debugging, writing feature code, or general Q&A with one obvious answer.
