apps/ios/Snowbound/Notebooks.swift    |   3 +
 crates/mobile/src/library.rs          |   3 +-
 crates/mobile/src/tests.rs            | 153 +++---------
 crates/notebook/README.md             |   7 +-
 crates/notebook/src/lib.rs            |  20 +-
 crates/notebook/src/session.rs        |  11 +-
 crates/notebook/src/session/tests.rs  | 183 ++++++++++++++
 crates/notebook/src/working.rs        | 417 ++++++++++++++++++--------------
 crates/notebook/tests/commit_fault.rs | 177 ++++++++++++++
 crates/notebook/tests/support/vfs.rs  | 147 +++++++++++
 crates/snowbound/src/main.rs          |   2 +-
 11 files changed, 817 insertions(+), 306 deletions(-)