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+Historical Notes on depot
+=========================
+
+This document collects references to documentation, design documents,
+code etc. that are no longer accurate nor used, but are of interest as
+historical background for the current state of depot. A comprehensive
+overview of the history of depot remains future work.
+
+- [The TVL Monorepo](https://tvl.fyi/monorepo-doc),
+  original (?) living design document for depot.
+- [Sparse Checkouts](designs/SPARCE_CHECKOUTS.md),
+  a proposal for a tool to create sparse checkouts of depot.
+
+<!--
+TODO(sterni): include other Google Docs I have links to?
+Questionable whether it is worth it in all cases, as some of them may
+have never been shared beyond ##?tvl(-dev)?. Interested in opinions.
+-->