dotnet-hosted-service-testing SKILL.md skillA
dotnet-hosted-service-testing from arasz/ai-badger is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add arasz/ai-badger/dotnet-hosted-service-testing@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- arasz/ai-badger
- Path
features/dotnet/skills/dotnet-workload/references/dotnet-hosted-service-testing/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Aug 24, 2026
- Size
- 8,838 bytes
- Repository stars
- 3
- License
- MIT
Use when writing or reviewing .NET BackgroundService tests with FakeTimeProvider/TimeProvider: lost-first-Advance semantics, inline-vs-threadpool timer callbacks, poll-loop test honesty (invocation counters, not side-effect counts), tick derivation from timeouts, DI registration smoke tests, vacuous-gate detection. Verified on .NET 10; includes an empirical probe script.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# dotnet-hosted-service-testing ## Trigger - Writing tests for a `BackgroundService` (ExecuteAsync loop, interval polling, periodic jobs). - Reviewing tests that use `FakeTimeProvider` / `TimeProvider` (e.g. `Microsoft.Extensions.Time.Testing`). - Judging whether hosted-service tests honestly cover the loop, interval, dedup, error-tolerance, and DI-registration paths. ## FakeTimeProvider + BackgroundService semantics (empirically verified on .NET 10) 1. **`StartAsync` does NOT run `ExecuteAsync` on the caller thread.** The loop body starts on a threadpool thread; `StartAsync` returns before the first pass runs. Consequence: `time.Advance(...)` immediately after `StartAsync` is reliably **LOST** — the `Task.Delay`/`PeriodicTimer` timer isn't registered yet. The first advance silently does nothing. 2. **Timer callbacks fire inline on the `Advance` caller thread**, but the `Task.Delay` continuation is queued to the threadpool (`RunContinuationsAsynchronously`). After each `Advance`, give the continuation real time to land (`await Task.Delay(100, TestContext.Current.CancellationToken)`), then assert. …
Read the whole file at its exact version.
How to install
mdr add arasz/ai-badger/dotnet-hosted-service-testing@sha256:5417a5ecb70ff37dThe line at the top of this page pins the label v1.0.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_wyxfvyvxuxlwnyh5)
0 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 24, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8838 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
arasz/ai-badger · 3 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wyxfvyvxuxlwnyh5 GET https://markdownregistry.com/api/v1/resolve?ref=arasz/ai-badger/dotnet-hosted-service-testing GET https://markdownregistry.com/api/v1/blob/5417a5ecb70ff37dc06068fb0b2711dec18e71bbfd284439a9f977fffb7ed8c8
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.