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 instructions/dotnet/maui/collectionview-windowsgit clone --depth 1 https://github.com/dotnet/mauiWhat 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 | $0.00333 | $0.00333 |
| Opus 5 | $0.00167 | $0.00167 |
| Sonnet 5 | $0.00067 | $0.00067 |
| Haiku 4.5 | $0.00033 | $0.00033 |
Grade A, and why
maui collectionview-windows.instructions.md 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 2d ago.
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
CollectionView — Windows (Items/ Handler)
Items/ is the ONLY Windows CollectionView implementation. Items2/ has NO Windows code.
WinUI ListView/ItemsRepeater Patterns
- Preserve WinUI XAML styles applied via native theming — clearing a MAUI property must restore the style-applied value, not a hardcoded default
double.NaNis the WinUI convention for unconstrained dimensions — do not confuse with MAUI'sdouble.PositiveInfinity- Use
DispatcherQueue.TryEnqueuefor deferred UI thread work — do not useDispatcher.BeginInvoke
Data Source and Change Notifications
- Handle all
ObservableCollectionchange actions (Add, Remove, Replace, Move, Reset) with range-scoped updates - Avoid full source refresh (
NotifyDataSetChangedequivalent) — it kills selection state and scroll position - Selection mode changes must propagate correctly to the native
SelectionModeproperty
Layout Configuration
ItemsLayoutchanges require reconfiguration of the underlying panel (e.g.,ItemsWrapGrid,ItemsStackPanel)- Verify that
ItemsLayout.Spanfor grid layouts maps correctly to WinUI'sMaximumRowsOrColumns
Cross-Platform Consistency
- Default values for control properties must produce the same visual result as Android and iOS
- Event firing order (selection changed, scrolled) should match other platforms for the same user interaction
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.
- 2d ago First seen · 27 lines · 333 tokens per session scan A 098a6dc123bd
maui collectionview-windows.instructions.md is an instructions file published in the GitHub repository dotnet/maui (23,317 stars, last pushed 2d ago), licensed MIT. It adds 333 tokens to every session, about $0.0017 per session on Opus 5. 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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