notebook-snapshot-extension/CHANGELOG.md

Changelog

v0.0.1

2026-07-21 — initial development release.

Added

• Manual snapshot commit (notebook toolbar button / command palette snapshot:commit) with name + description dialog
• Left sidebar timeline (SnapshotPanel) showing all snapshots for the current notebook
• Cell-level diff (cell-id matching first, LCS fallback; jsdiff for line diff)
• One-click restore via model.fromJSON() + context.save() (no page refresh)
• Skip-on-duplicate: commits with the same content hash as the most recent version raise a warning instead of saving
• Storage adapter layer with Local (atomic tmp+rename) and S3 (boto3 via optional [s3] extra)
• S3ConnectionError with friendly diagnostic at startup (classifies endpoint unreachable / credentials missing / permission denied / create failed)
• Snapshot files embed an envelope (id, timestamp, name, description, hash, size, notebook) so the manifest is fully rebuildable
• traitlets config: storage_type, local_root, s3_* (with S3_* env-var fallbacks for the credentials)
• Manual refresh button in the sidebar (workaround for occasional S3 list lag behind the commit)
• Three REST endpoints under /snapshot/notebook-version/: commit / list / content
• DEVELOPER.md covering architecture, build, debug, and packaging

Changed

• Renamed minio storage to s3 (boto3 is the generic S3 SDK; the same config covers AWS S3 and MinIO)
• The "save snapshot" toolbar button now uses panel.toolbar.addItem (was previously routed through docRegistry.addWidgetExtension, which created a new main-area tab instead of a toolbar button)

Fixed

• Notification.warning for skipped commits now uses autoClose: false and includes a console.log diagnostic plus a fallback warning for unexpected response shapes