Seven-tier security audit of the main process, each finding fixed with a
regression test. Typecheck (node + web) clean; unit tests 106 -> 140.
- Tier 1 (command exec/argv): allowlist the yt-dlp --update-to channel
(blocks arbitrary-binary-install RCE); gate per-download extraArgs behind
the customCommandEnabled consent flag in main (blocks --exec RCE); resolve
taskkill/schtasks by absolute System32 path; validate per-download
outputDir; normalize the URL in assertHttpUrl and use it at every spawn.
- Tier 2 (input validation): fix isSafeFilenameTemplate drive-relative
('C:foo') and Windows dotted-'..' traversal bypasses; percent-encode the
untrusted id in entryUrl; catch reserved device names with extensions in
sanitizeDirSegment.
- Tier 3 (fs/backup): drop malformed template rows in importBackup;
normalize deep-link URLs via assertHttpUrl.
- Tier 4 (cookies): confine the sign-in window's navigations/popups to web
URLs (recursively) and deny all web permissions on its session.
- Tier 5 (deep-link/argv): bound the .url file read to 64 KB; match the
aerofetch:// scheme case-insensitively.
- Tier 6 (Electron window): deny camera/mic/geolocation/USB/HID/serial/
Bluetooth permissions on the app window.
- Tier 7 (network/persistence): restrict the watched-source RSS fetch to
youtube.com feed URLs (SSRF guard); complete isValidSource validation.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Index an entire YouTube channel or playlist once, then download it into
organized <Channel>/<Playlist>/<NNN> - <Title> folders, with incremental
re-sync. Built in six rebuild-gated phases (F-K); see ROADMAP-PINCHFLAT.md.
- F: channel-walk indexer (/playlists + /videos) -> persisted Source +
MediaItem JSON stores; pure classify/dedup logic in indexerCore.ts
- G: Windows-safe folder paths + dir sanitizer (collectionOutputTemplate)
- H: Library tab + source tree + "Download pending" into the existing queue
- I: state-preserving re-index merge + persist-downloaded-on-complete
- J: watched sources, RSS fast-check, Task Scheduler + --sync launch
(the OS-level scheduling/RSS need a real-install smoke test)
- K: .info.json / thumbnail / .description sidecars for media servers
Also gitignore .gitea-token. 106 unit tests pass; typecheck + build clean.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Security:
- S1 (backup.ts): require explicit confirmation before enabling custom-command
templates from a backup file; import templates in a disabled state if declined
- S2 (cookies.ts): deny non-http/https popups in cookie login window, matching
the main window's setWindowOpenHandler defence
- S3 (download.ts): main-process concurrency cap — startDownload now rejects
spawns when active.size >= maxConcurrent (defence-in-depth; renderer already
enforces this but should not be the only gate)
- S4 (settings.ts, validation.ts): reject filenameTemplate values containing
path traversal (.. segments or absolute paths); validate outputDir is absolute
- S5 (history.ts, errorlog.ts, templates.ts, validation.ts): per-field
validation on JSON reads — invalid entries dropped rather than blindly trusted
Performance:
- P1 (settings.ts): getSettings() now only writes to disk when sanitization
actually changed a value; removes synchronous file I/O on every hot-path read
- P2 (ipc.ts, download.ts, downloads.ts): renderer forwards its pre-probed
metadata (title/channel/duration) via StartDownloadOptions.meta; main uses
it directly instead of spawning a redundant second yt-dlp probe
Maintainability:
- M1 (log.ts, download.ts, probe.ts): extract duplicated cleanError() to
src/main/log.ts; both callers import from the shared module
- M2 (buildArgs.ts): document parseExtraArgs escape-sequence limitations
- M3 (electron-builder.yml): clarify icon TODO as a pre-release action
- P3 (downloads.ts): document that lowering maxConcurrent mid-flight does
not pause active downloads (intended behaviour, now written down)
Tests:
- Add test/validation.test.ts covering isSafeFilenameTemplate, isSafeOutputDir,
isValidHistoryEntry, isValidErrorLogEntry, isTemplateLike (76 tests pass)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Phase A of the Seal feature-parity roadmap: configurable post-processing via a
shared DownloadOptions model (src/shared/ipc.ts), editable as persisted defaults
in Settings and overridable per-download in the download bar.
- audio formats (mp3/m4a/opus/flac/wav/aac), video container (mp4/mkv/webm),
preferred-codec sort (-S vcodec)
- subtitles (download/embed/langs/auto), SponsorBlock (remove/mark + categories
+ force-keyframes-at-cuts), embed chapters/metadata/thumbnail, square-crop
audio artwork
- playlist downloads: probe via `-J --flat-playlist`, inline selection UI
(checkbox list, select-all/none, live count); each entry enqueued as its own
single-video download, reusing the existing queue/concurrency/history
- reusable DownloadOptionsForm shared by Settings and the download bar so the
defaults and per-download override never drift
- ROADMAP.md tracking full Seal parity (phases A-E)
Also includes in-tree security hardening that landed alongside: preload sandbox
(CJS preload output), http(s)-only window-open + blocked renderer navigation,
argv-injection guard for URLs (src/main/url.ts), extension-allowlisted file
open/reveal (src/main/reveal.ts), yt-dlp version-check timeout, and a minimal
window.electron presence marker.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Electron + React (Fluent UI) desktop frontend for yt-dlp:
- Download queue with live progress, concurrency cap, cancel/retry
- Format/quality picker via yt-dlp probe; audio extraction to MP3
- Settings + history persistence (electron-store / JSON)
- Clipboard link auto-detect; persisted light/dark theme
- NSIS + portable packaging (binaries bundled at build time, not in git)
UI: "Studio" sidebar layout with a toffee-brown theme (light + neutral dark).
Dropdowns use a native <select> and tooltips a CSS-only Hint, to avoid a
dev-machine GPU overlay flicker/blank issue.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
debont80