Chunk identity across four retrieval libraries: four different answers, and no shared contract to inherit
The four open-source retrieval libraries examined here disagree about what a chunk is called, what its name is a function of, and whether it survives a rebuild. None offers a cross-runtime identity contract — so a corpus expected to outlive its retrieval stack has to own that contract itself.
MCG-F-0003 · Published 2026-09-06 · Confidence: provisional