plan-tests

Use to turn a feature's acceptance criteria into a test plan before any test is written — a table that maps every spec.md §5 acceptance criterion to at least one test, names the test levels (unit / integration / e2e / contract / load) without binding to a language or framework, and fixes the integration and data strategy. Triggers on "plan tests for {slug}", "test plan for {slug}", "how do we test {slug}", "test strategy for {slug}", "/sdd:plan-tests {slug}", "план тестів для {slug}", "як тестувати {slug}", "тест-план". Output: docs/features/{slug}/test-plan.md (separate file for M+), or inline in spec.md for XS/S per the size matrix. Hard-refuse if spec.md is missing → run specify {slug} first.