Diffusion for generating/editing ASTs? [D]

Diffusion-based AST generation is a compelling research direction gaining traction in structured code synthesis. Unlike autoregressive LLMs operating over flat token sequences, tree-structured diffusion would constrain outputs to syntactically valid programs by design, eliminating parse errors entirely. Prior work like CODEDIFFUSION and graph diffusion models on molecules offer partial precedent, but AST-native approaches remain underexplored. Compiler engineers and program synthesis researchers should watch this space closely.