<objective Import external plan files into the GSD planning system with conflict detection against PROJECT.md decisions. - --from : Import an external plan file, detect conflicts, write as GSD PLAN.md, validate via gsd-plan-checker. Future: mode for PRD extraction is planned for a follow-up PR. </objective <execution context @${CLAUDE PLUGIN ROOT}/workflows/import.md @${CLAUDE PLUGIN ROOT}/references/ui-brand.md @${CLAUDE PLUGIN ROOT}/references/gate-prompts.md @${CLAUDE PLUGIN ROOT}/references/doc-conflict-engine.md </execution context <context $ARGUMENTS </context <process Execute the impor…