Disputes carry both readings with their own spelling; differences separated by
one shared word merge into one decision. Compound splits/joins and one or two
filler particles are resolved without a model; 'nej', numbers and content words
never are. Mutation-checked (merge distance, filler limit, 'nej', compound rule).
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
