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Johannes Millan 610ca64894
fix(sync): harden file-based .bak recovery, split gap detection & conflict counts (#8857)
* fix(sync): harden file-based .bak recovery and split gap detection

Post-merge review of the SPAP-8/9/10/11 series found five defects in the
file-based sync adapter; all fixed here with regression tests proven
red/green against the previous code. Design cross-checked by a 7-reviewer
multi-agent pass; its findings are folded in.

- Split gap detection suppressed a syncVersion reset when the remote
  clock was EQUAL OR GREATER_THAN the last-seen clock — the exact bug the
  SPAP-9 review follow-up removed from the single-file path. A dominating
  client's snapshot reset (which compacts ops this client never saw) was
  treated as cosmetic, skipping snapshot hydration and silently
  diverging. Now EQUAL only, matching the single-file path.

- .bak recovery staged the CORRUPT primary's rev, which setLastServerSeq
  then promoted to _lastSeenRevs: every later poll's SPAP-10 pre-check
  read "unchanged" and skipped the re-download while the upload path (no
  .bak recovery) kept failing on the corrupt primary — sync wedged until
  another client rewrote the file. A recovery download now never
  stages/promotes the rev (each poll re-recovers and re-seeds the heal
  cache), and every site that rewrites _lastSeenRevs drops any stale
  staged rev via the shared _commitLastSeenRev.

- Snapshot uploads (force-upload / "Use Local" / E2EE re-encryption) left
  the pre-snapshot .bak behind. After a password rotation the stale
  old-key .bak was silently "recovered" by a still-old-key client
  (suppressing its wrong-password prompt) and heal-uploaded back over the
  new-key primary, reverting the rotation. Snapshot uploads now write the
  same payload to .bak FIRST, then the primary (_forceUploadWithBakFirst;
  deliberately FATAL — aborting pre-primary leaves the remote consistent
  for a retry). Applies to sync-data.json.bak and sync-ops.json.bak;
  sync-state.json.bak is deliberately exempt: its adoption is
  ref-validated (EQUAL clock vs snapshotRef), so a stale copy is inert,
  and it must keep serving the compaction crash window it exists for.

- Recovery additionally refuses a PLAINTEXT .bak when encryption is
  expected: decoding trusts the file's own prefix flags, so a plaintext
  .bak decodes even under a wrong/rotated key — the same
  wrong-password-suppression class via mode (rather than key) mismatch.

- The split migration wrote the v3 tombstone BEFORE neutralizing the
  legacy .bak (best-effort): a crash between the writes left a live v2
  .bak that an OFF client's recovery would resurrect over the tombstone,
  forking the folder. Neutralize-first, fatal. Residual: a step-3 failure
  after the migration's ops-file commit leaves a live v2 file until the
  next snapshot upload (documented at the call site).

- sync-ops.json — the hot file, rewritten on every op-bearing sync — had
  no backup at all, so a torn write wedged split sync until a manual
  force-upload. It now gets the same backup-before-overwrite + recovery +
  heal treatment as the single-file format. deleteAllData deletes the
  split files BEFORE the tombstone and treats source-of-truth deletion
  failures as errors (success:false) — it previously left every split
  file behind and reported success.

The three backup/recover pairs are collapsed into shared _writeBakFile /
_readBakFile helpers (the EQUAL||GREATER_THAN divergence above is exactly
the copy-drift failure mode this prevents); .bak file names move into
FILE_BASED_SYNC_CONSTANTS as remote-format surface.

* fix(sync): show the exact pending-op count in the conflict dialog

Compaction can fold still-unsynced ops into the snapshot baseline clock,
so the dialog's vector-clock delta could report "0 changes" right next to
"N local changes pending" — and the false 0 skipped the secondary
USE_REMOTE overwrite confirmation. The dialog now prefers the EXACT
pending-op count carried on LocalDataConflictError (new optional
ConflictData.localUnsyncedOpsCount): it is precisely "what USE_REMOTE
would discard", so both the displayed count and the >= 20-difference
confirmation threshold work from a truthful figure; the clock delta
remains the fallback when no measured count is supplied.
Display/confirmation-only — no clock or op-log semantics touched. Also
asserts the explicit-null lastSyncedVectorClock contract at the
fresh-client conflict throw sites (test gap from SPAP-7).

* chore(lint): enforce tx-handle-only access in op-log transactions

The SQLite op-log adapter serializes every entry point through a
per-connection FIFO queue; awaiting an adapter method inside a
.transaction() callback enqueues behind the transaction's own slot and
silently deadlocks all op-log persistence. The port contract documents
the precondition and #8849 promised a lint rule — this adds it
(no-adapter-in-tx, scoped to src/app/op-log) with RuleTester specs.
Matching is rename-proof: it flags access on the SAME receiver the
transaction was opened on (plain identifiers and any `this.<field>`), so
it does not depend on the field being named `_adapter`; known heuristic
gaps (extracted callbacks, aliasing, method indirection) are documented.
Also corrects the port doc: IndexedDB serializes only overlapping-scope
transactions; SQLite provides the stronger whole-connection exclusion.
2026-07-08 16:45:16 +02:00
.air
.devcontainer
.github ci: gate both SuperSync and WebDAV E2E on sync PR changes 2026-07-08 13:15:18 +02:00
.husky
.signpath/policies/super-productivity
.vscode
android feat(android): add home screen widget for today's tasks (#8737) 2026-07-03 18:32:34 +02:00
build
docs fix(op-log): serialize SQLite adapter transactions on the shared connection (#8849) 2026-07-07 18:00:25 +02:00
e2e fix(e2e): accept overwrite confirmation in provider-switch conflict test 2026-07-07 18:27:49 +02:00
electron perf(planner): drop per-CD getters/allocations in planner-task and kb (#8808) 2026-07-07 11:49:46 +02:00
eslint-local-rules fix(sync): harden file-based .bak recovery, split gap detection & conflict counts (#8857) 2026-07-08 16:45:16 +02:00
fastlane
ios
nginx
packages fix(sync): harden file-based .bak recovery, split gap detection & conflict counts (#8857) 2026-07-08 16:45:16 +02:00
scripts
snap/hooks
src fix(sync): harden file-based .bak recovery, split gap detection & conflict counts (#8857) 2026-07-08 16:45:16 +02:00
tools ci(lighthouse): raise script-count budget to 220, align warn to 210 (#8740) 2026-07-03 18:13:23 +02:00
.browserslistrc
.dockerignore
.editorconfig
.env.example
.gitattributes
.gitignore
.gitmodules
.gitpod.yml
.npmrc
.nvmrc
.prettierignore
.prettierrc.json
.stylelintrc.mjs
AGENTS.md
angular.json
ARCHITECTURE-DECISIONS.md
capacitor.config.ts
CLAUDE.md
CONTRIBUTING.md
docker-compose.e2e.fast.yaml
docker-compose.e2e.yaml
docker-compose.supersync.yaml
docker-compose.yaml
docker-entrypoint.sh
Dockerfile
Dockerfile.e2e.dev
Dockerfile.e2e.dev.fast
electron-builder.yaml
eslint.config.js fix(sync): harden file-based .bak recovery, split gap detection & conflict counts (#8857) 2026-07-08 16:45:16 +02:00
funding.json
Gemfile
Gemfile.lock
LICENSE
ngsw-config.json
package-lock.json
package.json ci(android): publish per-push dev builds to the Play internal track 2026-07-03 15:45:33 +02:00
README.md
SECURITY.md
tsconfig.base.json
tsconfig.json
webdav.yaml

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An advanced todo list app with timeboxing & time tracking capabilities that supports importing tasks from your calendar, Jira, GitHub and others

🌐 Open Web App or 💻 Download


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💻 Downloads & Install

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For all current downloads, package links, and platform-specific notes: check the wiki
Get it on GitHub


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✔️ Features

  • Keep organized and focused! Plan and categorize your tasks using sub-tasks, projects and tags and color code them as needed.
  • Use timeboxing and track your time. Create time sheets and work summaries in a breeze to easily export them to your company's time tracking system.
  • Helps you to establish healthy & productive habits:
    • A break reminder reminds you when it's time to step away.
    • The anti-procrastination feature helps you gain perspective when you really need to.
    • Need some extra focus? A Pomodoro timer is also always at hand.
    • Collect personal metrics to see, which of your work routines need adjustments.
  • Integrate with Jira, Trello, GitHub, GitLab, Gitea, OpenProject, Linear, ClickUp and Azure DevOps. Auto import tasks assigned to you, plan the details locally, automatically create work logs, and get notified immediately, when something changes.
  • Basic CalDAV integration.
  • Back up and synchronize your data across multiple devices with Dropbox and WebDAV support
  • Attach context information to tasks and projects. Create notes, attach files or create project-level bookmarks for links, files, and even commands.
  • Super Productivity respects your privacy and does NOT collect any data and there are no user accounts or registration. You decide where you store your data!
  • It's free and open source and always will be.

And much more!

Work View with global links

Note

The web version has some limitations: See the Web App vs Desktop comparison for more details.

📖 Documentation and Guides

Getting Started

Starting Point in Wiki:
First stepsReferenceHow-To

Productivity Tips:
Keyboard ShortcutsShort Syntax

Need Help?
Visit the discussions page

See the bottom of the README for more information on the documentation.

Advanced Topics

Here are some other topics covered in the official wiki:

Development:
Run dev serverPackage the appBuild for AndroidRun with Docker

Data Management:
User DataIssue ProvidersSync Providers

Customization:
PluginsThemes

APIs:
Sync ServerPluginsREST

Community

The development of Super Productivity is driven by a wonderful community of users and contributors. Thank you all so much for your support!

👀 Check out our awesome curated list of community-created resources about Super Productivity

♥️ Contributing

If you want to get involved, please check out the CONTRIBUTING.md

There are several ways to help.

  1. Spread the word: More users mean more people testing and contributing to the app which in turn means better stability and possibly more and better features. You can vote for Super Productivity on Slant, Product Hunt, Softpedia or on AlternativeTo, you can tweet about it, share it on LinkedIn, reddit or any of your favorite social media platforms. Every little bit helps!

  2. Provide a Pull Request: Here is a list of the most popular community requests and here some info on how to run the development build (wiki). Please make sure that you're following the commit message format and to also include the issue number in your commit message, if you're fixing a particular issue (e.g.: feat: add nice feature #31).

  3. Answer questions: You know the answer to another user's problem? Share your knowledge!

  4. Provide your opinion: Some community suggestions are controversial. Your input might be helpful and if it is just an up- or down-vote.

  5. Provide a more refined UI spec for existing feature requests

  6. Report bugs

  7. Make a feature or improvement request: Something can be done better? Something essential missing? Let us know!

  8. Translations, Icons, etc.: You don't have to be a programmer to help; learn how to contribute translations!

  1. Sponsor the project

  2. Create custom plugins or custom themes

Special Thanks to our Sponsors!!!

Recently support for Super Productivity has been growing! A big thank you to all our sponsors!

(If you are, intend to or have been a sponsor and want to be shown here, please let me know!)

Code Signing

Windows binaries are signed. Free code signing is provided by SignPath.io, certificate by SignPath Foundation.

Documentation: Manual versus Automated

There are two wikis: the official one hosted in by GitHub and the autonomously generated variant using DeepWiki.com. The manually curated version is a more stable and approachable resource designed to help you understand the app from a more human-focused perspective whereas DeepWiki is optimized for explaining the code itself with little regard for context beyond that.

Official Wiki

It is preferable to maintain local documentation rather than rely on an external service. It also preferable that the documentation is updated in tandem with the code changes as demonstrated in this commit.

Changes to files within ./docs/wiki are linted in CI before being automatically sync'd to the repository's official Wiki hosted by GitHub.

Migrating to Docusaurus is a long-term goal once the content and structure of the wiki has matured and the remaining "legacy docs" have either been reworked or removed. There are some automations in development to help reduce the difference between the published docs and the state of the code while retaining a human-in-the-loop.

DeepWiki.com

If you have very specific questions about how the code works or why a bug might be producing a particular message it might be useful to Ask DeepWiki . It can help "cite your sources" when discussing functionality and code that you don't fully understand as part of feature requests or bug reports.

This automated reference does come with some significant drawbacks:

  1. Intent: Describes what code does, not why decisions or tradeoffs were made.
  2. Staleness: Will *always* lag behind the code.
  3. Code-Focused: Does not provide guides or conceptual explanations.
  4. Cost: Potential future cost and higher resource usage than static docs.