dotnet-breaking-changes

dotnet-breaking-changes is a skill in dotnet/skills, last changed 3 Nov 2026. It can run shell commands.

From the author

Use before changing .NET/C# code whose callers you do not control: a NuGet library, or a repo with PublicAPI.Shipped/Unshipped.txt, ApiCompat, multiple TargetFrameworks, InternalsVisibleTo, or generated (.g.cs) partials. Green builds miss silent breaks from optional parameters, parameter names, sealing, const values, nullability, and #if. USE FOR: "without breaking existing callers"; adding a public method, overload, optional parameter, or interface member to a shipped library; renaming a public method or an internal helper a friend assembly uses; consolidating duplicated logic; changing a signature, nullability, default, or attribute; adding a target framework; RS0016/RS0017 or ApiCompat errors; "is this PR breaking?". For a rename, extract, or merge, also invoke csharp-refactoring. DO NOT USE FOR: an executable whose callers all live in one project; renaming a local variable or private member, even in a shipped library; formatting; framework/SDK/NuGet upgrades (use dotnet-upgrade).

What it can touch

Runs shell commands

How much a skill can do, not whether it is risky.

Pattern check

Nothing flagged

That isn't proof the skill is harmless.

Commit 26a0658 · 6 Nov 2026

How the check works

Pattern check: nothing flagged

That isn't proof the skill is harmless.

QAI Index

74/QI

We rate every listed skill the same way, from 0 to 100.

A guide to compare by, not a verdict on the skill.

How it's scored

Install

Each tab says whether it installs commit 26a0658, the one we checked, or the latest version.

OpenCode also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Goose also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Windsurf (Devin Desktop) also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Zed also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Roo Code also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Factory Droid also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Junie also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

Amp also looks in .agents/skills/ and ~/.agents/skills/, so use the Any agent steps.

No install command here reaches Kiro. Copy the skill's folder into .kiro/skills/ in your project, or ~/.kiro/skills/ for all your projects. dotnet/skills/plugins/dotnet/skills/dotnet-breaking-changes (opens in a new tab)

Antigravity also looks in .agents/skills/, so the Any agent steps reach it with This project. For All projects, see where Antigravity looks.

Cline also looks in .claude/skills/, so the Claude Code steps reach it with This project. For All projects, see where Cline looks.

No tab for your agent? Use Any agent for OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie and Amp. With This project, Any agent also reaches Antigravity and Claude Code reaches Cline. Kiro needs the folder copied by hand.

Pinned to commit 26a0658, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/dotnet/skills.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 26a06585630870595c4fba50e313621989f58fc7 &&git -C "$tmp" sparse-checkout set -- plugins/dotnet/skills/dotnet-breaking-changes &&git -C "$tmp" checkout -q 26a06585630870595c4fba50e313621989f58fc7 &&mkdir -p .claude/skills &&mkdir .claude/skills/dotnet-breaking-changes &&cp -R "$tmp"/plugins/dotnet/skills/dotnet-breaking-changes/. .claude/skills/dotnet-breaking-changes/ &&rm -rf "$tmp"

If Claude Code was already running and this created the skills folder, run /reload-skills.

Claude Code docs

Pinned to commit 26a0658, the one we checked.

Skills in the Claude apps belong to your account rather than to a project.

Make dotnet-breaking-changes.zip, with the skill folder at the top level:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/dotnet/skills.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 26a06585630870595c4fba50e313621989f58fc7 &&git -C "$tmp" sparse-checkout set -- plugins/dotnet/skills/dotnet-breaking-changes &&git -C "$tmp" checkout -q 26a06585630870595c4fba50e313621989f58fc7 &&out="$(mktemp -d)" &&cp -R "$tmp"/plugins/dotnet/skills/dotnet-breaking-changes "$out"/dotnet-breaking-changes &&(cd "$out" && zip -qr - dotnet-breaking-changes) > dotnet-breaking-changes.zip &&rm -rf "$tmp" "$out"

In Claude, open Customize > Skills, select +, then + Create skill > Upload a skill, and choose dotnet-breaking-changes.zip.

On Free, Pro and Max plans, turn on Code execution and file creation (Create and edit files in newer settings) under Settings > Capabilities.

Claude apps docs

Pinned to commit 26a0658, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/dotnet/skills.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 26a06585630870595c4fba50e313621989f58fc7 &&git -C "$tmp" sparse-checkout set -- plugins/dotnet/skills/dotnet-breaking-changes &&git -C "$tmp" checkout -q 26a06585630870595c4fba50e313621989f58fc7 &&mkdir -p .agents/skills &&mkdir .agents/skills/dotnet-breaking-changes &&cp -R "$tmp"/plugins/dotnet/skills/dotnet-breaking-changes/. .agents/skills/dotnet-breaking-changes/ &&rm -rf "$tmp"

Codex picks up new skills on its own; restart it if this one does not appear.

Codex docs

Pinned to commit 26a0658, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/dotnet/skills.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 26a06585630870595c4fba50e313621989f58fc7 &&git -C "$tmp" sparse-checkout set -- plugins/dotnet/skills/dotnet-breaking-changes &&git -C "$tmp" checkout -q 26a06585630870595c4fba50e313621989f58fc7 &&mkdir -p .cursor/skills &&mkdir .cursor/skills/dotnet-breaking-changes &&cp -R "$tmp"/plugins/dotnet/skills/dotnet-breaking-changes/. .cursor/skills/dotnet-breaking-changes/ &&rm -rf "$tmp"

Cursor docs

Pinned to commit 26a0658, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/dotnet/skills.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 26a06585630870595c4fba50e313621989f58fc7 &&git -C "$tmp" sparse-checkout set -- plugins/dotnet/skills/dotnet-breaking-changes &&git -C "$tmp" checkout -q 26a06585630870595c4fba50e313621989f58fc7 &&mkdir -p .github/skills &&mkdir .github/skills/dotnet-breaking-changes &&cp -R "$tmp"/plugins/dotnet/skills/dotnet-breaking-changes/. .github/skills/dotnet-breaking-changes/ &&rm -rf "$tmp"

In a running Copilot CLI session, run /skills reload.

Or install it with gh skill, which also installs the commit we checked. Needs GitHub CLI 2.90 or later.

gh skill install dotnet/skills plugins/dotnet/skills/dotnet-breaking-changes/SKILL.md@26a06585630870595c4fba50e313621989f58fc7 --agent github-copilot --scope project

Copilot & VS Code docs

Pinned to commit 26a0658, the one we checked.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/dotnet/skills.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 26a06585630870595c4fba50e313621989f58fc7 &&git -C "$tmp" sparse-checkout set -- plugins/dotnet/skills/dotnet-breaking-changes &&git -C "$tmp" checkout -q 26a06585630870595c4fba50e313621989f58fc7 &&mkdir -p .gemini/skills &&mkdir .gemini/skills/dotnet-breaking-changes &&cp -R "$tmp"/plugins/dotnet/skills/dotnet-breaking-changes/. .gemini/skills/dotnet-breaking-changes/ &&rm -rf "$tmp"

In a running session, run /skills reload.

Or use Gemini CLI’s own installer. Installs the latest version, not the one we checked.

gemini skills install https://github.com/dotnet/skills.git --path plugins/dotnet/skills/dotnet-breaking-changes --scope workspace

Gemini CLI docs

Pinned to commit 26a0658, the one we checked.

OpenCode, Goose, Windsurf (Devin Desktop), Zed, Roo Code, Factory Droid, Junie, Amp and Antigravity read .agents/skills in a project.

From your project's root folder:

tmp="$(mktemp -d)" &&git clone -q --depth 1 --filter=blob:none --no-checkout https://github.com/dotnet/skills.git "$tmp" &&git -C "$tmp" fetch -q --depth 1 origin 26a06585630870595c4fba50e313621989f58fc7 &&git -C "$tmp" sparse-checkout set -- plugins/dotnet/skills/dotnet-breaking-changes &&git -C "$tmp" checkout -q 26a06585630870595c4fba50e313621989f58fc7 &&mkdir -p .agents/skills &&mkdir .agents/skills/dotnet-breaking-changes &&cp -R "$tmp"/plugins/dotnet/skills/dotnet-breaking-changes/. .agents/skills/dotnet-breaking-changes/ &&rm -rf "$tmp"

Or use the skills CLI from skills.sh. Installs the latest version, not the one we checked. The skills CLI reports installs to skills.sh unless you set DISABLE_TELEMETRY=1.

npx skills@1.7.4 add dotnet/skills --skill dotnet-breaking-changes

Agent Skills docs

Read SKILL.md first

MIT

Licence

5.8k

Repo stars

Folder last changed

Publisher

Files

Checked

6 Nov 2026

What it can touch

From the files and frontmatter at commit 26a0658. This is how much a skill can do, not whether it is risky.

Runs shell commands
Its instructions or files give the agent commands to run on your computer.

Pattern check

Pattern check: nothing flagged · commit 26a0658 · 6 Nov 2026

We checked every text file in this skill, at commit 26a0658 on 6 Nov 2026, against 45 published patterns such as download-and-run commands, hidden text and credential access. We don't run the skill, we don't read the web pages it points to, and we can't judge everything its instructions might lead an agent to do. In published tests, pattern checks like this one missed most malicious skills. Read the skill before you install it — especially anything it asks you to download or run.

How the check works Report an incorrect finding

Format check

Each agent reads SKILL.md a little differently. We check the file against each one's published rules; we don't run the skill in any agent.

Agent Skills specPasses
Claude CodePasses
Claude apps & API uploadPasses
Uploading to claude.ai or the Claude API, or packaging with Anthropic's script, accepts only the six spec fields and stops on anything else.
- Note
  The description is 998 characters. The claude.ai Help Center says 200 at most, though Anthropic's API docs and validator allow 1,024. D4
  Fix: If the claude.ai upload refuses it, trim the description to 200 characters.
OpenAI (Codex & API)Passes
VS Code & CopilotPasses

SKILL.md

Read SKILL.md on GitHub

Files

5 files

Path	Size
SKILL.md (opens in a new tab)	14.7 KB
references/internals-visible-to.md (opens in a new tab)	2.3 KB
references/multi-targeting.md (opens in a new tab)	2.8 KB
references/public-api.md (opens in a new tab)	5.5 KB
references/source-generation.md (opens in a new tab)	2 KB

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At a glance

What it can touch

Pattern check

QAI Index

Install

Claude Code

Claude apps

Codex

Cursor

Copilot & VS Code

Gemini CLI

Any agent

What it can touch

Pattern check

Format check

SKILL.md

Files

More from dotnet/skills

Other Coding & code review skills