Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add rules/baijum/ukulele-companion/android-viewmodelgit clone --depth 1 https://github.com/baijum/ukulele-companionWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00000 | $0.00283 |
| Opus 5 | $0.00000 | $0.00142 |
| Sonnet 5 | $0.00000 | $0.00057 |
| Haiku 4.5 | $0.00000 | $0.00028 |
Grade A, and why
android-viewmodel scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Android ViewModel Rules
StateFlow only
ViewModels expose state via StateFlow — do not use LiveData. Use MutableStateFlow internally and expose as StateFlow.
private val _uiState = MutableStateFlow(MyUiState())
val uiState: StateFlow<MyUiState> = _uiState.asStateFlow()
Repository abstraction
ViewModels must not access SharedPreferences directly. All persistence goes through repository classes in the data/ package.
Coroutines only
All async work uses Kotlin coroutines. No RxJava, no callback-based APIs. Use viewModelScope for ViewModel-scoped coroutine launches.
Existing ViewModels
FretboardViewModel, TunerViewModel, PitchMonitorViewModel, ChordLibraryViewModel, FavoritesViewModel, SongbookViewModel, SettingsViewModel, ScalePracticeViewModel, MetronomeViewModel, MelodyViewModel, BackupRestoreViewModel, CustomProgressionViewModel, LearningProgressViewModel, SetlistViewModel, TtsAnnouncementThrottler
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 29 lines · 0 tokens per session scan A c3be850a26a4
android-viewmodel is a cursor rule published in the GitHub repository baijum/ukulele-companion (13 stars, last pushed 5d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 283 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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