Definition. Retained-context policy [ftip-00DC]
Definition. Retained-context policy [ftip-00DC]
Fix a token history \(h_t=(x_0,\ldots ,x_{t-1})\). A retained-context policy is a deterministic map \(\kappa _t(h_t)\) that selects an ordered subsequence of the history, together with a decoder that conditions its next token on that subsequence. The policy, rather than the model weights, names which prior tokens remain available at step \(t\).
A comparison of two policies is conditional on the same model, prompt law, decoding law, stopping rule, and budget unless the comparison includes a second declared intervention coordinate.