# OmniHarness: Harnessing Generalizable Visual Generation via Symbolic Policy Learning > Source: > Published: 2026-09-16 16:30:10+00:00 Unified multimodal large language models (MLLMs) and multi-agent systems have advanced visual generation. However, three limitations remain. (1) Existing methods often distill task-specific experience with limited generalizability. (2) Reflection is often deferred until task completion. (3) Knowledg