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…d fallback Expander now self-sustains instead of permanently stalling when all nodes exceed degree threshold. Three-tier frontier selection: base threshold (3), widened thresholds (6, 12), then least-connected node fallback. New nodes inherit parent_layer + 1 instead of hardcoded layer=1.
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Summary
parent_layer + 1instead of hardcodedlayer=1, enabling proper layer trackingChanges
app/core/graph.py: Addedget_least_connected_nodes()queryapp/workers/expander.py: Adaptive frontier selection in_expand_cycle(), layer-aware node creationTest plan