Design a dynamic stochastic general equilibrium (DSGE) model with heterogeneous agents and climate-transition risk to assess welfare and distributional impacts of carbon pricing and carbon border adjustment policies. Specify agent types (e.g., households by income/asset holdings, firms by sector and trade exposure), production sectors, stochastic processes (transition shocks, productivity and climate damage processes), market structures and frictions; derive equilibrium conditions and welfare metrics (consumption-equivalent, distributional incidence, inequality measures); outline calibration and solution methods (heterogeneous-agent algorithms, numerical approximation, perturbation or global solution methods) and required data; propose and interpret policy experiments comparing carbon tax vs. carbon border adjustment mechanisms under transition uncertainty, with sensitivity analyses and robustness checks.