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 tunitgit 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/tunit)<a href="https://agentmods.dev/skills/managedcode/dotnet-skills/tunit"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/tunit/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/tunit"><img src="https://agentmods.dev/badge/skills/managedcode/dotnet-skills/tunit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00089 | $0.01907 |
| Opus 5.5 | $0.00036 | $0.00763 |
| Sonnet 5.5 | $0.00018 | $0.00381 |
| Haiku 4.5 | $0.00009 | $0.00191 |
Grade A, and why
tunit 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.
How it starts
The opening of the file, as written. The whole thing — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.
TUnit
Trigger On
- the repo uses TUnit
- you need to add, run, debug, or repair TUnit tests
- the repo uses Microsoft.Testing.Platform-based test execution
- the repo uses
ClassDataSource<...>(Shared = SharedType.PerTestSession),TUnit.Playwright, or--treenode-filter
Do Not Use For
- xUnit projects
- MSTest projects
- generic test strategy with no TUnit-specific mechanics
Inputs
- the nearest
AGENTS.md - the test project file and package references
- the repo's current TUnit execution command
Workflow
- Confirm the project really uses TUnit and not a different MTP-based framework.
- Read the repo's real
testcommand fromAGENTS.md. If the repo has no explicit command yet, start withdotnet test PROJECT_OR_SOLUTION. - Keep the TUnit execution model intact:
- tests are source-generated at build time
- tests run in parallel by default
- on .NET 10, test modules also run in parallel by default up to
Environment.ProcessorCount - built-in analyzers should remain enabled
- Choose the fixture level deliberately:
- plain TUnit tests for isolated logic
- shared AppHost/Aspire fixtures for HTTP, SignalR, SSE, or UI flows
WebApplicationFactorylayered over shared Aspire infra when tests need Host DI services,IGrainFactory, or other runtime internals
- Reuse expensive fixtures with
ClassDataSource<Fixture>(Shared = SharedType.PerTestSession)instead of booting distributed infrastructure per test. Fixture reuse does not serialize consumers: keep the fixture concurrency-safe and give each test unique mutable state. - Keep tests and test modules parallel. Do not add
--max-parallel-test-modules 1,TUNIT_MAX_PARALLEL_TESTS=1,[assembly: NotInParallel], a class-wide[NotInParallel], or an equivalent global restriction. - Use keyed
[NotInParallel("collision-domain")]only on the smallest tests that perform destructive changes to the same shared state and can corrupt one another. A shared read-only fixture, expensive startup, module boundary, or vague CI-stability concern is not a reason to limit parallelism. - Run the narrowest useful scope first with
dotnet test ... --treenode-filter "..."on .NET 10. Use the older--separator only when the repository is pinned to an SDK that requires it. - Follow
Test Output Budget: show bounded root-error evidence and link coverage, Playwright screenshots, and HTML artifacts; never dump host logs. - Use
[Test],[Arguments], hooks, and dependencies only when they make the scenario clearer, not because the framework allows it.
What ships with it
5 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.
- 1mo ago Changed · +7 lines 7d438dd6f6bf
- 1mo ago First seen · 134 lines · 89 tokens per session scan A fe9f41853587
tunit is a skill published in the GitHub repository managedcode/dotnet-skills (492 stars, last pushed yesterday), licensed MIT. It adds 89 tokens to every session and 1,907 once invoked, about $0.0004 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 2026-09-03.
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