One bit per log frame in .zit-cache/dispositions: crosslink-relevant or not. A full derive consults it and never reconstructs the file blobs and SUBMANIFEST tree nodes that were most of a wide store's walk; the walk distills a fresh map either way. Same trust tier as the log-scan index: self-checksummed, keyed to a validated log prefix, stamped with the shun fingerprint, absent on any doubt. pkgsrc submanifest cold derive 302 s to 22 s; a consuming derive's body is byte-identical, pinned by test. check-in: a18d2edd67 user: dmestas tags: trunk

repocache.store and checkpoint.store concatenated header + body + image into a full resident copy before writing; both now stream the pieces to the file with the checksum folded incrementally, byte-identical output. The clone path frees its view before the reopen builds a second derived state. ZIT_DERIVE_FOOTPRINT reports the derive body's composition. pkgsrc cold open: peak RSS 2.32 GB to 2.07 GB. check-in: 3107e23e24 user: dmestas tags: trunk

A dense clone no longer holds the repository in memory until the exchange ends: each round's artifacts land in the log and their resident bytes are released, the shape of git's index-pack. A delta whose basis has not arrived defers on its hash; a basis first seen as a phantom is revisited when its content lands. Cone-scoped clones keep the batched pass, whose keep set needs the converged store. Streamed and batched logs are byte-identical, pinned by test. ZIT_PERSIST_WAITING reports the drain's peak deferred set. check-in: 533b0a6490 user: dmestas tags: trunk