Cobalt

Cobalt 2.3.0 combines all development since the published v2.2.2 release. The planned 2.2.3 release was never published; its changes are included here.

Release highlights

• Write Markdown with continuous editing, Find/Replace, table tools and recoverable drafts.
• Keep saved note history and Undo/Redo; manage local storage, Trash and recovery.
• Track movies, TV, anime and manga with optional Trakt sync and configurable providers.
• Personalize local fonts, smart folders, reminders and styled sharing.
• Use one local Cobalt app without a Cobalt account or retired cloud services.
• Refresh the product website, privacy disclosures and fifteen store screenshots.

Web Companion remains experimental. Its settings and server startup are disabled in release builds; development can continue through an explicit debug feature flag.

The detailed source changes follow. Historical validation and its limits are in docs/version-comparison-v2.2.2-to-current-2026-11-09.md. Those tests used pre-release 2.2.3 builds and do not constitute validation of the final 2.3.0 APK.

Distribution and privacy

• Consolidate Foss/Play source flavors into one local Cobalt application. Remove the retired Cobalt account, Firebase/cloud deployment and upload/download services. Retain optional user-configured Gemini, media and Trakt integrations.
• Give debug builds their own package/data and label. Build one release APK and retain its R8 mapping; preserve WorkManager input-merger constructors in R8.
• Disable automatic Android backup/device transfer; restrict shared-file paths and redact application logs and throwable details.
• Store configured API/OAuth credentials with Android Keystore-backed AES-GCM. This protects credentials; it does not add biometric locking or encrypted notes.

Notes, editor and reader

• Replace inline Room note bodies with verified, recoverable storage and resumable legacy migration. Keep list/search/widget/reminder reads bounded rather than loading every complete note into a list row.
• Add immutable 64 KiB text payloads, shared persistent range trees and durable saved Undo/Redo in schema 15. Reuse unchanged text across saved generations and lazily migrate compatible file bodies after independent SHA verification.
• Commit saved content heads, metadata/search derivatives and navigation together. Reject stale metadata epochs; protect staged roots, recovery work and readers.
• Use synchronized SQLite rollback journaling for authoritative shared writes. Preserve primary write failures, recover acknowledged drafts and retain saved originals when staging/publication fails. Full-document SHA work still scales with note size; storage sharing is not an instant-save guarantee or a backup.
• Add continuous native editing with a bounded disk-backed input window, global selection, Undo/Redo, cancellable paste, source styling and recoverable journals. Preserve accepted operations under queue pressure and release editor file locks.
• Keep Edit as plain Markdown source and Preview as rendered Markdown. Continue lists/checklists on Enter; preserve escaped markers and nested fenced indentation.
• Add Markdown table creation, row/column changes, alignment and next-cell actions. Keep fenced code protected, retain table actions and serialize rapid Undo/Redo.
• Add literal Find/Replace, batched replacement and heading navigation with bounded result lists and overflow indicators. Keep search focus and highlight matched text.
• Render notes incrementally with bounded parsed-block/page caches and prefetch. Preserve long fence/table context, inline code, table alignment and typography; support ATX headings, horizontal rules and custom-tab links.
• Update checklist markers without reopening the reader or resetting scroll. Refresh detail state after explicit Save and retain/export drafts after failures.
• Keep Quick Note text/selection independent of delayed persistence echoes; fence debounced writes so newer typing is not overwritten by stale draft completion.
• Distinguish loading, loading-more and empty-note states in the reader. Expose Find in note directly from the toolbar and retain existing note actions.

Storage, Trash and recovery

• Add Storage with usage categories, history, Trash, unlinked files, recovery and cache/database maintenance pages. Distinguish saved data, protected recovery, disposable cache and database overhead with explicit accounting.
• Retain deleted items for 30 days, support reviewed restoration/permanent deletion, and keep required history/media references protected. Cancel deleted media work and retain provider identities so remote synchronization cannot reimport deletes.
• Retain/export/restore eligible saved versions and compact compatible older file versions into verified deltas. Shared history counts additional physical storage separately from the logical size of a version.
• Protect unsaved writing, current heads, active readers, Trash and unknown retained data during cleanup. Add reviewed disposable cleanup with a continuous five-second hold, cancellation and stale-review checks; keep advanced cleanup collapsed.
• Add themed skeleton loading, refreshed usage hierarchy, morphing pull-to-refresh and expressive confirmation sheets. Reuse existing recovery/settings navigation.
• Show cumulative verified/total note counts with clearer migration instructions. Label deletion as Move to Trash or Delete permanently according to the setting. Explain eligible cleanup, current-content/draft exclusions and recovery limits without absolute safety guarantees; keep the existing storage mechanics.

Capture, links, folders and Home

• Add six radial capture shortcuts and camera/gallery source sheets. Review incoming Android shares before saving; keep document import results/errors visible until dismissed. Receive supported text documents with strict decoding and size policy.
• Persist link-preview jobs beyond Capture/Dock lifetimes. Keep manual descriptions on automatic retries; explicit Refresh can replace them with race protection. Fill missing social metadata without manufacturing unavailable facts.
• Prevent internal cache paths, generated names and content/file URIs from becoming user-facing titles. Resolve original file names, sanitize at save/display boundaries and repair eligible legacy path titles (issue #21).
• Detect duplicate folders, URLs and movie identities; show inline notices and offer applicable Trash recovery rather than silently adding another item.
• Add local smart folder ranking, fuzzy search, organization settings and a 52-week capture heatmap. Persist Home filters and refine empty-state guidance.
• Reduce Home card invalidation and scrollbar drag work; skip haze capture when blur is disabled. Calculate actual media sizes for size sorting/filtering.
• Keep inline folder controls available above the keyboard (issue #24). Dismiss deletion Undo on navigation and show its remaining time with a border.
• Align Saved notes, Draft recovery, Saved history and TV shows navigation labels.

Media and providers

• Add optional Trakt OAuth PKCE/App Links, account-bound two-way synchronization, persistent outbox retries, pending-change review and safe token revocation. Guard disconnect/login races and retain unmatched IDs for later retry. Silence synchronization notifications and suppress them while Cobalt is active; remove its progress banner from the Media Hub.
• Share one movie/TV save path across Capture/Dock; reconcile TMDB/Trakt identities, preserve local choices/deletions and import remote progress without replacing notes.
• Consolidate Trakt, TMDB and Jikan into Media & Providers with source enablement and priority. Add custom Jikan v4 endpoints, cached anime/manga facts and reading labels for manga. Jikan items stay out of Trakt writes (local Jikan request #26).
• Add half-star local ratings, watch/read status, bookmarks, cached season/episode paging, progress and next-up details. Present provider/source ratings with supplied badges and playback/streaming-provider information when available.
• Add inline YouTube trailer playback, pause on background/offscreen, and retry. A missing or blocked trailer is not represented as successful playback.

Sharing, appearance and help

• Add styled Link, Image, Movie and Note share sheets with floating hero previews, connected controls, themes and image/file export. Keep sheet swipes independent of vertical drag handling; randomize attribution on sheet launch.
• Provide Document, Minimal and Compact note cards, Markdown file export and bounded clipboard copy. Restore horizontally scrolling Markdown tables with edge fades; redesign A4 document, memo and quote layouts with typography scaled to the template while retaining chosen font families. Downsample oversized image sources and bound export dimensions.
• Reduce share-card text sizes and show longer excerpts. Preserve partial Markdown fences/table headers and complete rows, mark continuation, and keep Compact prose distinct from quotations and code without splitting Unicode characters.
• Add local FOSS fonts and licenses, live text/font previews and per-role typography preferences applied to reader, editor, code and Markdown layouts.
• Add adaptive local review reminders, custom delivery time, Gemini usage/daily token history and interactive activity charts; show configured model names.
• Add public product/legal/callback pages for Trakt App Links. These pages are a website and OAuth callback, not a note-editing web companion.
• Keep the installed version's complete changelog bundled with the app. Load published history from GitHub Releases with timestamped offline caching, conditional refresh and clear retry errors; preserve opt-in update checks.
• Verify the exact uploaded APK for the selected release before opening a download. Show explicit FOSS/Play choices for older releases and label missing APKs clearly. Publish releases only after checking the signed APK and uploaded bytes; generate website download links from confirmed release assets.
• Expand the open-source library directory.
• Allow consecutive bug reports through Report Another/input reset (issue #23). Refresh reporter/version headers and share icons across feedback and survey.
• Redesign the experience survey as two short steps using existing icons and theme colors. Leave every answer optional and unselected; use 1–10 reaction and recommendation sliders with Clear actions. Open the existing feedback email directly with plain-text answers, without requiring local saving or marking an email-app launch as successful delivery. Include preview/copy fallback.
• Fix missing storage experimental-API opt-in and replace deprecated bottom-sheet and Locale construction APIs.

Verification and remaining scope

• Add host/device regression coverage for note migration, recovery, publication, shared storage, metadata, selection, media identity/sync, sharing and typography. Test additions and historical report commits are indexed in the full commit ledger.
• Published v2.2.2 emulator testing reproduced stale reader state after Save, exercised exact 100k-character note recovery and saved/opened a 400k-character fixture. Performance readings are emulator snapshots, not hardware guarantees.
• Verify a real signed v2.2.2 → current in-place upgrade with 500 mixed legacy records. Startup migration and interruption/resume retained all records, 320 exact note bodies, 70 exact local media files, folders, archived items and the configured TMDB key. Detailed evidence and limits are linked in the comparison.
• Verify the subsequent survey/polish revision with 77 targeted tests, including slider interaction and light/dark renders. Device checks and email-delivery limits are recorded in docs/app-polish-verification-2026-11-10.md.
• Complete app backup/restore, encrypted notes, biometric app lock and per-note image galleries are outside this release. The experimental Web Companion is disabled in release builds and is not a published user feature. Media/account/network features, large-file budgets and every supported Android version require their own verified results; untested work is not marked passed.