U-Define: Designing User Workflows for Hard and Soft Constraints in LLM-Based Planning

ArXi:2605.02765v1 Announce Type: cross LLMs are increasingly used for end-user task planning, yet their black-box nature limits users' ability to ensure reliability and control. While recent systems incorporate verification techniques, it remains unclear how users can effectively apply such rigid constraints to represent intent or adapt to real-world variability. For example, prior work finds that hard-only constraints are too rigid, and numeric flexibility weights confuse users.