.NET MAUI is a C# and XAML framework for building native mobile and desktop applications from one shared codebase. Developers use it to create apps for Android, iOS, iPadOS, macOS, and Windows. The catalogue entries provide skills, instructions, and agents for working with .NET MAUI.
Borrowing it
Nothing to install: this file belongs to dotnet/maui. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/dotnet/maui/main/.github/instructions/collectionview-android.instructions.mdgit clone --depth 1 https://github.com/dotnet/mauiWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/dotnet/maui/collectionview-android)<a href="https://agentmods.dev/instructions/dotnet/maui/collectionview-android"><img src="https://agentmods.dev/badge/instructions/dotnet/maui/collectionview-android/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/dotnet/maui/collectionview-android"><img src="https://agentmods.dev/badge/instructions/dotnet/maui/collectionview-android.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00428 | $0.00428 |
| Opus 5.5 | $0.00171 | $0.00171 |
| Sonnet 5.5 | $0.00086 | $0.00086 |
| Haiku 4.5 | $0.00043 | $0.00043 |
Grade A, and why
maui collectionview-android.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 1mo 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 — Android (Items/ Handler)
Items/ is the sole Android handler — see
collectionview-handler-detection.instructions.mdfor the full platform→handler mapping.
RecyclerView Adapter Patterns
- Use range-specific notifications (
NotifyItemRangeInserted,NotifyItemRangeRemoved,NotifyItemRangeChanged) when INCC semantics provide exact affected ranges — prefer these overNotifyDataSetChangedfor preserving scroll position and animations - Full refresh via
NotifyDataSetChangedis valid forResetactions, ambiguous index cases, and header/footer template changes - Handle all
ObservableCollectionchange actions: Add, Remove, Replace, Move, Reset - On
Reset, recalculate adapter state from scratch — do not assume incremental consistency
ViewHolder Recycling
BindingContextMUST be updated on every rebind — stale data from a previous holder is a common source of visual glitches- Do not store item-specific state in the ViewHolder outside of
BindViewHolder— recycled holders carry state from previous items - Dispose and recreate platform views only when the template changes, not on every rebind
Layout Manager
- Select layout manager (Linear, Grid, custom) based on
ItemsLayoutspecification — do not hardcode ItemsLayoutproperty changes require full layout manager replacement, not partial reconfiguration- Account for Android pixel rounding in item measurement — fractional dp values cause 1px gaps
Memory and Lifecycle
- Unsubscribe from
ScrollChangeand adapter observers inDisconnectHandler— do NOT call Dispose on platform objects - Scroll position restoration after adapter data changes must handle empty-collection edge case
Regression Patterns
- Test across empty collection, single item, many items, and with grouping — a fix for one layout scenario routinely breaks another
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.
- 1mo ago First seen · 33 lines · 428 tokens per session scan A 70e777d17fd8
maui collectionview-android.instructions.md is an instructions file published in the GitHub repository dotnet/maui (23,322 stars, last pushed today), licensed MIT. It adds 428 tokens to every session, about $0.0017 per session on Opus 5.5. 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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Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).