Document w4096s256context_system eval (every-save context_system example)

Add concatted AIME rerun for SUMM context / context_maybe

Add concatted AIME utils.py rerun for SUMM/LASTK (budget-clipped avg)

tokfixed: prefer extra-window encodings over generated_tokens when larger

Add tokfixed SUMM/LASTK results (full-trace generated_tokens)

Add dataset card YAML metadata

Add README describing vLLM-tool SUMM/LASTK swaps