crates/notebook/src/background.rs  |   2 +-
 crates/notebook/src/lib.rs         |  50 ++++--
 crates/notebook/src/session.rs     | 165 ++++++++++++++------
 crates/notebook/src/task.rs        |  63 +++++---
 crates/notebook/src/worker.rs      |  16 ++
 crates/notebook/src/working.rs     | 151 +++++++++++++++++--
 crates/notebook/tests/cache.rs     |  35 +++++
 crates/snowbound/src/history.rs    | 125 +++++++++------
 crates/snowbound/src/library.rs    |  48 +++++-
 crates/snowbound/src/main.rs       |  84 +++++++++--
 crates/snowbound/src/manage.rs     |   4 +-
 crates/snowbound/src/protection.rs | 259 +++++++++++++++++++++++---------
 crates/snowbound/src/recycle.rs    |  63 +++++---
 crates/snowbound/src/undo.rs       |  84 ++++++-----
 crates/snowbound/src/web.rs        |   9 +-
 crates/snowbound/web/glue.js       |   2 +-
 tools/web/test_storage_barrier.mjs |  59 ++++++++
 17 files changed, 936 insertions(+), 283 deletions(-)