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feat(backup): backup, restore and snapshots before migrations - #287
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One-click backup of SENTIENT_HOME to a zip (SQLite online backup API for the database, config, workspace, skills, files, devices certificate; never keychain secrets). Restore is checked and staged, then applied at the next engine start with a snapshot of the current data first and a rollback on failure. Snapshots are taken before a schema update (PRAGMA user_version), before the first added column, before a Hermes import and before a restore; the last N are kept. Scheduled backups, REST routes, CLI commands and a Settings > Backups section.
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Review comments at @sentient/backup/archive.py:
- Around line 455-465: Update the rollback handling in the restore flow that
moves items between home, pending, and old: track names whose rollback _move
raises OSError, and if any rollback fails, raise BackupError while preserving
the restore-old directory so the remaining data is not discarded by a later
restore.
Review comments at @sentient/backup/service.py:
- Around line 174-179: Update _scheduled so it writes SCHEDULE_META only after
backup_now succeeds; after handling a BackupError, return before updating the
timestamp so the scheduled backup can be retried.
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CHANGELOG.mddesktop/electron/main/index.tsdesktop/electron/main/paths.tsdesktop/src/features/settings/SchemaForm.tsxdesktop/src/features/settings/SettingsPage.tsxdesktop/src/features/settings/sections.tsdesktop/src/features/settings/sections/Backups.tsxdesktop/src/hooks/backups.tsdesktop/src/hooks/queryKeys.tsdesktop/src/lib/api.tsdesktop/src/lib/events.tsdesktop/src/lib/types.tsdesktop/src/types/bridge.d.tsdocs/API.mdsentient/app.pysentient/backup/__init__.pysentient/backup/archive.pysentient/backup/service.pysentient/cli.pysentient/config/schema.pysentient/gateway/app.pysentient/gateway/routes/__init__.pysentient/gateway/routes/backups.pysentient/migrate/hermes.pysentient/store/db.pytests/test_backup.py
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Inline comments:
Review comments at @tests/test_backup.py:
- Line 315: Replace the broad monkeypatch.undo() in the scheduled-backup test
with a monkeypatch.context() scope around the backup_now override and the two
scheduled calls and assertions that depend on it. Let the scoped patch restore
automatically before the final _scheduled() call, preserving the autouse
SENTIENT_HOME override.
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docs/API.mdsentient/backup/archive.pysentient/backup/service.pytests/test_backup.py
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… folder Falls back to <home>/backups when Documents is missing or can't be written to. Tests always override the Documents folder, and a conftest guard fails any test that writes to the real user's backup folders. The Settings section says a backup holds the devices certificate, and Open shows the actual folder.
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Inline comments:
Review comments at @desktop/electron/main/index.ts:
- Around line 382-395: Restrict the showInFolder handler to backup locations
instead of accepting arbitrary renderer-supplied paths. Allow the configured
backups.folder, the default backup folder, and the home backups directory;
reject all other paths before navigating or selecting an item. Reuse the
existing backup-location configuration and path-resolution symbols rather than
introducing unrelated validation.
Review comments at @desktop/src/features/settings/sections/Backups.tsx:
- Line 185: Replace the raw prefix check in the backup-folder location logic
with a separator-aware containment check so sibling paths sharing the home
directory’s prefix are not classified as inside it; handle platform-specific
separators and case consistently with the existing path utilities.
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CHANGELOG.mddesktop/electron/main/channels.tsdesktop/electron/main/index.tsdesktop/electron/preload/index.tsdesktop/src/features/settings/SchemaForm.tsxdesktop/src/features/settings/sections/Backups.tsxdesktop/src/lib/bridge.tsdesktop/src/lib/types.tsdesktop/src/types/bridge.d.tsdocs/API.mdsentient/backup/archive.pysentient/backup/service.pysentient/cli.pysentient/config/schema.pysentient/paths.pytests/conftest.pytests/test_backup.py
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Inline comments:
Review comments at @sentient/backup/archive.py:
- Around line 534-537: Update the restore flow around create_snapshot and the
finally cleanup of pending so restore-pending is preserved only when the
pre-restore snapshot fails before staged data is modified. Continue removing
pending for other restore outcomes, including failures after replacement begins.
- Around line 490-496: Handle `old.mkdir()` failures in the restore setup as
`BackupError`, chaining the original `OSError`, so the existing restore error
handler records the failure and starts the engine with current data.
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CHANGELOG.mddesktop/src/lib/api.tsdesktop/src/lib/events.tsdesktop/src/lib/types.tsdocs/API.mdsentient/app.pysentient/backup/archive.pysentient/config/schema.pysentient/gateway/app.pysentient/gateway/routes/__init__.pysentient/paths.pysentient/store/db.pytests/test_backup.py
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…etup errors, narrow showInFolder
… sync to the cloud Windows resolves Documents with SHGetKnownFolderPath (FOLDERID_Documents) through ctypes, so a folder redirected to OneDrive is used instead of a stale ~/Documents. The overview names the sync service (OneDrive, Dropbox, Google Drive, iCloud) the backup folder is inside, and Settings says the backups are copied to the cloud too. The test guard also covers the real known Documents folder.
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Inline comments:
Review comments at @sentient/backup/archive.py:
- Around line 280-286: Update the backup creation flow around
`manifest["skipped"]` to reject the backup when any files were skipped, raising
`BackupError` before writing the manifest or publishing the archive. Preserve
successful archive creation when no files were skipped.
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CHANGELOG.mddesktop/electron/main/index.tsdesktop/src/features/settings/sections/Backups.tsxdesktop/src/lib/types.tsdocs/API.mdsentient/backup/archive.pysentient/backup/service.pysentient/paths.pytests/conftest.pytests/test_backup.py
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Inline comments:
Review comments at @sentient/backup/archive.py:
- Line 503: In apply_pending_restore, validate the filtered contents list before
applying the staged restore; if DB_NAME is absent, refuse the restore and return
without reporting success. Ensure the invalid manifest cannot proceed through
the success path that deletes the staged data.
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CHANGELOG.mddesktop/src/lib/types.tsdocs/API.mdsentient/app.pysentient/backup/archive.pysentient/config/schema.pysentient/gateway/app.pysentient/gateway/routes/__init__.pysentient/paths.pysentient/store/db.pytests/test_backup.py
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Closes #151
What changed
Engine (
sentient/backup/)sentient.dbcopied with SQLite's online backup API while the engine runs (never a raw copy of the live WAL file),config.yaml,workspace/,skills/,files/andtls/. Never inside: keychain secrets,gateway.token, logs, the browser profile, WhatsApp's link, voice models, scratch folders, the backups folder. The manifest records counts (chats, memories, tasks, skills) and the sign-ins that live in the keychain.POST /api/backups/restorechecks the archive (manifest, every name stays inside the listed items, SQLitequick_check) and unpacks it tobackups/restore-pending; the next engine start (gateway lifespan, before config and database open) applies it. It takes a snapshot of the current data first, replaces exactly the items the manifest lists, and puts everything back if a move fails. The result (including which sign-ins need redoing, checked live) is shown until dismissed.files/, newestbackups.snapshots_keepkept, all restorable): when the database'sPRAGMA user_versiondiffers from the newSCHEMA_VERSION(an existing DB on this build gets one on first start), before the firstensure_columnthat really adds a column to an existing DB (safety net), before a Hermes import, and before a restore. A failed snapshot is logged and never blocks startup.Documents/Sentient Backupsby default, outside the data folder so a backup survives losing it (Windows: the Known Folder API's Documents viaSHGetKnownFolderPath/FOLDERID_Documentsthrough ctypes, so a folder redirected to OneDrive is used rather than a stale~/Documents, falling back to~/Documents; macOS~/Documents; LinuxXDG_DOCUMENTS_DIRor~/Documents). Falls back to<home>/backupswhen Documents is missing or can't be written to. Snapshots, a staged restore and the restore result stay in<home>/backups.SENTIENT_DOCUMENTS_DIRoverrides Documents; every test sets it, and an autouse guard intests/conftest.pyfails any test that changes the real~/.sentient/backups,~/Documents/Sentient Backupsor (on Windows) the known Documents folder'sSentient Backups.folder_cloudnames OneDrive, Dropbox, Google Drive or iCloud when the backup folder is inside one (theOneDrive,OneDriveConsumerandOneDriveCommercialenvironment variables, plus path segments), and the Backup folder row says "This folder syncs to OneDrive, so your backups (chats, memory, the device certificate) are copied to the cloud too." with Choose... as before.backups.scheduleoff/daily/weekly,backups.keep(only automatic ones are pruned).GET/POST /api/backups,POST /api/backups/inspect,POST/DELETE /api/backups/restore,DELETE /api/backups/last-restore; eventbackup.updated. CLI:sentient backup [--to],sentient restore FILE [--now]. docs/API.md section 20, CHANGELOG.Desktop
pickFilesgained typedfilters(for.zip), and a newshowInFolder(path)opens a folder or selects a Sentient backup zip in its folder (never opens or runs a file) for the Open button.Real test (engine from this worktree, port 8789, fresh Maya Rao seeded home, random token)
POST /api/backups):sentient-backup-20261011-110629.zip, 176 KB, counts{chats: 13, memories: 60, tasks: 20, skills: 11}, top-level entriesconfig.yaml, files, manifest.json, sentient.db, skills, workspace(no logs, token, WAL files).sign_inslisted Anthropic, OpenRouter, Google Calendar, GitHub, Telegram (labels only, read as present/absent).demo-completed("Make a 10-week half marathon plan"), deleted chat "Sunrise hike at Nandi Hills", renamed chatdemo-chat-mainto "CHANGED AFTER BACKUP", addedfiles/after-backup.txt. Listing showed 58 facts, 19 tasks, 12 chats.POST /api/backups/inspectthenPOST /api/backups/restore→{staged: true, restart_required: true},pending_restoreset. Engine stopped hard (like the desktop's restart, so the old-walwas still on disk) and started again. Log:sentient.backup.archive: restored a backup made 2026-10-11T05:36:29 .../restore result: {"error": null, "snapshot": "sentient-snapshot-20261011-110722.zip"}.Facts/tasks/chats listing diffed identical to the one taken before the backup (60 facts, 20 tasks, 13 chats, original title back),
after-backup.txtgone. A "before restoring a backup" snapshot (12 chats, 58 memories, 19 tasks, no files) is listed, andlast_restore.sign_insshows each sign-in withsigned_in: true(same computer).ollama/nomic-embed-text, with the Ollama lock):claude-code/sonnet: "what's my cat called, and when is my mum's birthday?" → "Biscuit, your ginger cat. And your mum's birthday is November 2nd."memory_sourcesled with facts 48 and 34 (the two that were deleted and restored). A second turn ("who is Kavya, and what's my eating-out budget?") had usagemodel: claude-code/sonnet→ "Kavya is your developer colleague who builds the components you design. Your eating-out budget is ₹3,000/month."ollama_chat/qwen3:8b(usagemodel: ollama_chat/qwen3:8b, 2650 prompt tokens): same question → "Your cat's name is Biscuit. Your mum's birthday is on 2 November." with facts 34 and 48 as its memory sources.sentient restore <that zip> --nowinto a new, emptySENTIENT_HOME→ the app opened it with 60 facts and 13 chats.PRAGMA user_version = 0, as a database from an older build): on start the log saidsnapshot sentient-snapshot-20261011-111106.zip taken before updating the database (version 0 to 1),user_versionbecame 1; its manifest hasschema_version: 0(copied before the update), contents withoutfiles. Starting again took no new snapshot.scripts/smoke.mjs settings/backups, 1440x1300 and 900x900, and the built renderer served by the engine in a browser):Note: the seed scripts point Ollama at an unreachable address and use a fake embedding model, so before switching memory search to
nomic-embed-texta first Sonnet turn found no memories. That is the screenshot seed's setup, not this change.Re-run after the default-folder change (same engine, port 8789)
The test engine's Documents was a scratch folder (
SENTIENT_DOCUMENTS_DIR) so nothing touched the real Documents.GET /api/backups→folder=default_folder=<scratch>/documents/Sentient Backups,homeseparate.POST /api/backupswrotesentient-backup-20261011-123418.zipthere (17 chats, 60 memories, 20 tasks).demo-weekly, chat "Budget and Japan trip savings", renamed "Morning check-in", added a file. Staged the restore, hard-stopped and started the engine: restore applied with snapshotsentient-snapshot-20261011-123445.zip; the listing diffed identical to before the backup and the extra file was gone.claude-code/sonnet(usagemodel: claude-code/sonnet): "Your cat is Biscuit (a ginger cat). Mum's birthday is November 2." with restored facts 48 and 34 first inmemory_sources.ollama_chat/qwen3:8b: "Your cat's name is Biscuit. Your mum's birthday is on 2 November." from facts 34 and 48.<home>/backupsand "Inside Sentient's data folder, because your Documents folder can't be used. Pick a folder elsewhere so a backup survives losing it."~/Documents/Sentient Backupsand~/.sentient/backupsdo not exist after all runs.After merging main (incognito chats, #154)
sessions.incognito, soSCHEMA_VERSIONis now 2. Starting the merged engine on the test home (version 1, no column) loggedsnapshot sentient-snapshot-20261011-130203.zip taken before updating the database (version 1 to 2), then the column was added (60 facts, 20 tasks intact). That is a real schema update, not a simulated one.secure_deleteon, so a backup never keeps one (test checks the raw database bytes).Re-run with Windows' real Documents in OneDrive (fake Known Folder result)
C:\Users\<user>\OneDrive\Documents, the same as[Environment]::GetFolderPath('MyDocuments')(read only, nothing written there).sentient.paths._windows_documentswith a scratchfake-profile/OneDrive/Documents(a stalefake-profile/Documentsalso existed).GET /api/backupsgavefolder=.../fake-profile/OneDrive/Documents/Sentient Backups,folder_cloud: "OneDrive",folder_in_home: false.POST /api/backupswrotesentient-backup-20261011-135007.zipthere (19 chats, 60 memories, 20 tasks); the stale Documents stayed empty.demo-dailyand chat "Weekly review, week 40", renamed a chat; restored from the OneDrive copy, hard-stopped and restarted:error: null, snapshotsentient-snapshot-20261011-135034.zip, listing diffed identical.claude-code/sonnet: "Your cat is Biscuit, and your mum's birthday is November 2."qwen3:8b: "My cat's name is Biscuit. Your mum's birthday is on 2 November." (a small-model phrasing slip, right facts). Both had restored facts 48 and 34 as memory sources.OneDrivefolder): the Backup folder row shows the amber line "This folder syncs to OneDrive, so your backups (chats, memory, the device certificate) are copied to the cloud too." above "In your Documents folder, apart from your data...", with Open and Choose....~/Documents/Sentient Backups,~/OneDrive/Documents/Sentient Backupsand~/.sentient/backupsdo not exist after all runs.Checks
pytest -q: 1418 passed, 2 skipped (after merging main again) (feat(chat): show sources under answers #290 added messages.sources, and feat(tasks): recurring tasks remember their last runs #292 added tasks.notepad, soSCHEMA_VERSIONis 4) (full suite, with the real-folder guard on every test);tests/test_backup.pyhas 23 tests (a damaged staged restore changes nothing, a file that can't be read means no backup, Known Folder lookup and fallback, cloud-sync detection, a restore whose snapshot fails stays waiting, incognito chats left out, identical-state round trip incl. files and sign-ins, schema-bump snapshot and pruning, ensure_column safety net, Hermes snapshot, snapshot restore keeps files, hostile/damaged archives refused, scheduled backups, routes, lifespan applies a staged restore, rollback on a failed move, a rollback that fails keeps the data aside, a failed scheduled backup is retried and told once)ruff check sentient tests packaging: cleannpm run typecheck && npm run build: cleanFor the owner
Documents/Sentient Backupswith the data-folder fallback, andtls/stays in backups with a privacy line in Settings.