Krzysztof kuhy Rudnicki
3a9db8a3ab
Every install mints a uuid and pushes under it, and nothing ever cleans those directories up. This remote holds 25: two live devices and 23 that stopped writing. Each dead one still costs a round trip in the log pull and in each of the three bank syncs -- roughly 400ms per peer per tick -- so they dominate what is left of the background tick. Diagnosis first, since the obvious theory was wrong. These are not the residue of phone reinstalls: seventeen of them are frozen at the *same* instant (2026-08-13T16:45:04) holding near-identical ~400-record copies of one log, which is the signature of repeated fresh-install runs, not organic use. That also means `adb install -r` preserving SharedPreferences was never the issue, so no Android backup change is warranted on this evidence. Dry-run by default, and the safety rails are the point: * `plan_prune` only reads; it is what the default run prints. * A device is prunable only when every record it holds is already held by a device being kept. Against the live remote that is 20 devices and **zero** records lost -- verified before writing the command, not after. * `pc`/`phone`/`desktop` are never proposed: they carry pre-migration history and `SYNC_LEGACY_DEVICE_ID` still names one as this device's own former path. * `--apply` refuses without `--backup-dir`, and every peer's raw bytes are written to disk before a single delete. Nothing has been deleted; this commit only adds the tool. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LJ5YnA3CERitQ57HjMu2Qz |
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| .. | ||
| .agents/skills | ||
| android | ||
| assets/icon | ||
| bin | ||
| desktop | ||
| lib | ||
| test | ||
| web | ||
| .gitignore | ||
| .metadata | ||
| analysis_options.yaml | ||
| install_arch.sh | ||
| pubspec.lock | ||
| pubspec.yaml | ||
| README.md | ||
| run.sh | ||
| skills-lock.json | ||
diet_guard_app
Companion app for diet_guard: log meals on the phone, and on the Linux
desktop, sharing one food log through GitHub-backed sync.
Two targets, and only two
| Target | What it is |
|---|---|
| Android | a normal Flutter app (flutter build apk) |
| Linux desktop | the Flutter web build, served by a local wrapper and shown in a Chrome --app window |
There is no linux/ directory. Flutter's GTK embedder manages ~20fps at
3840x2160 -- measured on a stock flutter create counter app, so it is the
toolkit rather than this code -- where the same Dart rendered by Chrome
sustains ~144fps (~/todo/docs/desktop-performance-findings.md). Running
flutter create --platforms linux here would silently restore the slow path.
Commands
flutter test # the app's suite
flutter analyze
bash run.sh # build the web bundle and launch the desktop app
bash install_arch.sh # build + install the pacman package and .desktop entry
flutter build apk --release # the phone build
adb install -r build/app/outputs/flutter-apk/app-release.apk
Never adb uninstall or pm clear this package: both wipe the on-device log.
The desktop wrapper
bin/diet_guard_desktop.dart is the other half of the desktop app, because a
browser cannot touch the filesystem. It:
- serves the built web assets from
build/web(or/opt/diet-guard-app/webonce packaged); - keeps an on-disk copy of every document and photo under
~/.local/share/diet-guard-desktop/, which is what makes a wiped Chrome profile recoverable -- for photos it is the only copy, since they never sync; - holds the GitHub token (
~/.config/diet_guard_app/sync_token, falling back to the PC gate's~/.config/diet_guard/sync_token) and proxiesapi.github.complus the device flow, whose endpoints send no CORS headers and so cannot be called from a page at all.
The port (8732) and the Chrome --user-data-dir must stay fixed.
IndexedDB is keyed by origin and lives inside that profile, so changing either
looks to the app like a device with no history.
Platform seams
dart:io does not fail a web compile; it becomes a stub that throws at
runtime, so the symptom of a missed seam is a blank white window rather than a
build error. Every platform edge is a conditional export -- document_store*,
blob_store*, background_tasks*, notification_backend*, token_vault*,
github_client_factory*, attached_image*. Branch on kIsWeb before any
Platform.is…, which itself throws on web.
What the desktop genuinely loses, by design rather than omission:
- Background reminders. A browser runs nothing once its window is closed,
so the due-slot check runs in-page every 5 minutes while the window is open.
On the PC the real backstop is
diet-guard-gate.timer, which locks the screen. - Camera capture. The browser picker is a file input.
- Photo sharing between devices -- unchanged:
imagePathwas always stripped before push.
Sync identity
Three devices push under diet-guard-sync/devices/: pc (the Python gate),
phone, and desktop. Each must keep its own id -- two devices sharing one
would overwrite each other's pushed log on every tick.