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 skills add managedcode/dotnet-skills --skill maui-app-lifecyclegit clone --depth 1 https://github.com/managedcode/dotnet-skillsWrote 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/skills/managedcode/dotnet-skills/maui-app-lifecycle)<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/maui-app-lifecycle"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/maui-app-lifecycle/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/skills/managedcode/dotnet-skills/maui-app-lifecycle"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/maui-app-lifecycle.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 | $0.00144 | $0.02142 |
| Opus 5.5 | $0.00058 | $0.00857 |
| Sonnet 5.5 | $0.00029 | $0.00428 |
| Haiku 4.5 | $0.00014 | $0.00214 |
Grade A, and why
maui-app-lifecycle 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 2mo 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.
This is a copy
100% identical to maui-app-lifecycle — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 225 lines — stays where its author put it; the contents beside it link to each section on GitHub.
.NET MAUI App Lifecycle
Handle application state transitions correctly in .NET MAUI. This skill covers the cross-platform Window lifecycle events, their platform-native mappings, and patterns for preserving state across backgrounding and resume cycles.
When to Use
- Saving or restoring state when the app backgrounds or resumes
- Subscribing to Window lifecycle events (Created, Activated, Deactivated, Stopped, Resumed, Destroying)
- Hooking into platform-native lifecycle callbacks via
ConfigureLifecycleEvents - Deciding where to place initialization, teardown, or refresh logic
- Understanding the difference between Deactivated and Stopped
When Not to Use
- Page-level navigation events — use Shell navigation guidance instead
- Registering services at startup — use dependency injection guidance instead
- Calling platform-specific APIs outside lifecycle context — use platform invoke guidance instead
Inputs
- The target lifecycle transition (e.g., "save draft when backgrounded", "refresh data on resume")
- Which platforms the developer targets (Android, iOS, Mac Catalyst, Windows)
- Whether the app uses multiple windows (iPad, Mac Catalyst, desktop Windows)
App States
A .NET MAUI app moves through four states:
| State | Description |
|---|---|
| Not Running | Process does not exist |
| Running | Foreground, receiving input |
| Deactivated | Visible but lost focus (dialog, split-screen, notification shade) |
| Stopped | Fully backgrounded, UI not visible |
Typical flow: Not Running → Running → Deactivated → Stopped → Running (resumed) or Not Running (terminated).
Window Lifecycle Events
Microsoft.Maui.Controls.Window exposes six cross-platform events:
| Event | Fires when |
|---|---|
Created |
Native window allocated |
Activated |
Window receives input focus |
Deactivated |
Window loses focus (may still be visible) |
Stopped |
Window is no longer visible |
Resumed |
Window returns to foreground after Stopped |
Destroying |
Native window is being torn down |
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 2mo ago First seen · 225 lines · 144 tokens per session scan A 88b2b00a9cc5
maui-app-lifecycle is a skill published in the GitHub repository managedcode/dotnet-skills (496 stars, last pushed yesterday), licensed MIT. It adds 144 tokens to every session and 2,142 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to maui-app-lifecycle, differing in 0 lines, and is treated as a copy.
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