BM25 and optional dense retrieval over the symbol vocabulary, index-tree descent and the hybrids of those, query planning, token budgets, and citation verification for answers.

Grounded question format, scoring for recall, precision, ranking quality, evidence and groundedness, plus a text-search baseline and an oracle chooser that measures the ceiling a tree descent could reach.

Holds a graph and everything derived from it across many questions, and knows when the source has moved on.

Command-line interface for inspecting, querying, visualizing, enriching, and evaluating a repository graph.