Development Premortem

Explicit-only skill for development and engineering premortems. Use this skill only when the user explicitly invokes "$development-premortem", "use development-premortem", "run a development premortem", "development-premortem this", "premortem this architecture", "premortem this migration", "premortem this deploy", "premortem this technical plan", "haz un development-premortem", "premortem técnico", or "premortem de desarrollo". Stress-test technical work before build, merge, rollout, migration, architecture change, integration, deployment, or infrastructure change by assuming it failed in production and working backward. Do NOT trigger on normal code review, debugging he…