dotnet/skills · plugins/dotnet-upgrade/skills/migrate-nullable-references/SKILL.md

migrate-nullable-references skillA

migrate-nullable-references is agent-read markdown (skill) from dotnet/skills: Enable nullable reference types in a C# project and systematically resolve all warnings. USE FOR: adopting NRTs in existing codebases, file-by-file or project-wide migration, fixing CS8602/CS8618/CS86xx warnings, annotating APIs for nullability, cleaning up null-forgiving operators, upgrading dependencies with new nullable annotations. DO NOT USE FOR: projects already fully migrated with zero warnings (unless auditing suppressions), fixing a handful of nullable warnings in code that already has .

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/migrate-nullable-references@git:20260421.05aeb65
Exact content
mdr add dotnet/skills/migrate-nullable-references@sha256:4c229d8b7626a373

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_4bigqmpnyksdqdpr.svg)](https://markdownregistry.com/a/art_4bigqmpnyksdqdpr)

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Versions

versioncommittedcommitsizeaudit
git:20260421.05aeb65 latest2026-04-21 05aeb65 35,936 BA view · diff
git:20260307.042a9d22026-03-07 042a9d2 35,923 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 (35936 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_4bigqmpnyksdqdpr
GET https://markdownregistry.com/api/v1/resolve?ref=dotnet/skills/migrate-nullable-references
GET https://markdownregistry.com/api/v1/blob/4c229d8b7626a3737b2cf26ea89583a90fecf4f1d9136f04377688c75f22879b

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