DagShell is a virtual filesystem that organizes data by content instead of location. Identical files automatically share storage through SHA256 hashing. The structure is a directed acyclic graph rather than a tree, so the same content block can be referenced from multiple paths without duplication.
I built it because sometimes you need filesystem semantics without touching actual disk. Testing, sandboxing, versioning, portability. The implementation has 583 tests with 77% coverage.
The DAG structure
Traditional filesystems are trees: each file has exactly one parent. DagShell uses a DAG where content is stored once and referenced by hash:
/project/
