claude@clouddev1
9aa7e2ede0
The QA1/QA2 design: an `explain` prefix command over `show data` / `update` / `delete` that runs EXPLAIN QUERY PLAN (without executing the statement) and renders the result as an annotated tree. Plan steps keep the engine's own wording; an annotation taxonomy marks full scans, index use, and the automatic-index "you should add an index here" case. Introduces a general styled-output-line mechanism — an OutputLine may carry per-span styling — realising the per-span theming ADR-0016 deferred; the plan renderer is its first consumer. The explained SQL is shown above the tree as standard, copy-pasteable SQL. - docs/adr/0028-query-plans.md — the ADR. - docs/adr/README.md — index entry. - docs/requirements.md — QA2 [~] -> [ ]; QA1 note reconciled (designed in ADR-0028).