Record the V1-V3 experiments and accept the minimal semantic-preservation first stage.
semantic_synthesis_isolation
Isolation Gold set derived from the existing Topic Reconstruction V2 A-I cases. Every case supplies one manually fixed Discussion Subject and the complete original evidence bundle. The model performs Semantic Synthesis only; subject detection, subject grouping, and evidence assignment are outside the experiment.
Expected criteria evaluate semantic event distinctions, outcomes and scope, actions, unresolved issues, and supporting evidence. They do not evaluate subject discovery or exact wording.