dotnet/skills · plugins/dotnet-test/skills/testability-obstacle/SKILL.md

testability-obstacle skillA

testability-obstacle is agent-read markdown (skill) from dotnet/skills: MUST USE for C#/.NET deterministic tests that require the smallest production seam for DateTime/Task.Delay/File/Environment/Guid/Random, static API preservation, nested/parallel overrides, or no real I/O. USE ONLY when the target workspace contains C# source plus a .csproj or .sln. DO NOT USE for audits, bulk migration, code that already has an injectable seam, or an explicit migration to a user-named existing abstraction (migrate-static-to-wrapper). Use instead of general test generation when t.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add dotnet/skills/testability-obstacle@git:20260908.0afcd3e
Exact content
mdr add dotnet/skills/testability-obstacle@sha256:9049628d3391b9f8

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_7nhtsxqhxngtyanw.svg)](https://markdownregistry.com/a/art_7nhtsxqhxngtyanw)

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Versions

versioncommittedcommitsizeaudit
git:20260908.0afcd3e latest2026-09-08 0afcd3e 15,414 BA view · diff
git:20260903.30b30ef2026-09-03 30b30ef 14,873 BA view · diff
git:20260902.00b3bac2026-09-02 00b3bac 14,217 BA view · diff
git:20260828.2b9056b2026-08-28 2b9056b 13,604 BA view · diff
git:20260827.0be2ef92026-08-27 0be2ef9 12,984 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (15414 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

GitHub

dotnet/skills · 5,437 stars · license MIT · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_7nhtsxqhxngtyanw
GET https://markdownregistry.com/api/v1/resolve?ref=dotnet/skills/testability-obstacle
GET https://markdownregistry.com/api/v1/blob/9049628d3391b9f83b7aed31a9848a11bae7167b5486aad998bb8d1ac53c91d6

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.