A retrieval index that diagnoses its own failures and rewrites its keys.

arXiv 2609.19656 targets how index keys expose each document's knowledge, and the fact that the right representation varies by retrieval environment so no fixed strategy generalizes. SELF-INDEX gives the index an Optimizer that diagnoses retrieval shortfalls, refines the optimization strategy, and reprocesses the index. arXiv It automates the loop currently running on a person's attention every time a RAG corpus degrades under query drift.