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Implementation details for the EF Core dotnet-ef CLI and tooling.
OfficialMITAuto-check passed
Install Tooling
$ npx skills add dotnet/efcore --skill tooling -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dotnet/efcore tooling --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/dotnet/efcore.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/tooling .claude/skills/tooling && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "tooling" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/tooling into .claude/skills/tooling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tooling", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/dotnet/efcore/tree/main/.agents/skills/toolingType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add dotnet/efcore --skill tooling -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dotnet/efcore tooling --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dotnet/efcore.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/tooling .agents/skills/tooling && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "tooling" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/tooling into .agents/skills/tooling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tooling", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add dotnet/efcore --skill tooling -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dotnet/efcore tooling --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dotnet/efcore.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/tooling .cursor/skills/tooling && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "tooling" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/tooling into .cursor/skills/tooling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tooling", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/dotnet/efcore.git --path .agents/skills/tooling--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add dotnet/efcore --skill tooling -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dotnet/efcore tooling --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dotnet/efcore.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/tooling .gemini/skills/tooling && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "tooling" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/tooling into .gemini/skills/tooling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tooling", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install dotnet/efcore toolingInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add dotnet/efcore --skill tooling -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/dotnet/efcore.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/tooling .github/skills/tooling && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "tooling" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/tooling into .github/skills/tooling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tooling", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add dotnet/efcore --skill tooling -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install dotnet/efcore tooling --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/dotnet/efcore.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/tooling .opencode/skills/tooling && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "tooling" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/tooling into .opencode/skills/tooling/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "tooling", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
tooling- GitHub stars
- 15k
- Token cost
- ~351 tokens
- SKILL.md length
- 123 words
- Files
- 1
- Skills in repo
- 17
- Repo updated
- First seen
- Licence
- MIT
At a glance
Implementation details for the EF Core dotnet-ef CLI and tooling.
- Changing dotnet-ef commands
- SKILL.md covers dotnet-ef CLI (src/dotnet-ef/), PMC (src/EFCore.Tools/), MSBuild Tasks… and Testing, plus 1 more section
- Calls dotnet
- EFCore.Tools (PMC)
What it does
Tooling is an agent skill from dotnet/efcore, published by the product's own GitHub organization. Implementation details for the EF Core dotnet-ef CLI and tooling. Use when changing dotnet-ef commands, the ef wrapper, EFCore.Tools (PMC), or EFCore.Tasks MSBuild integration.
Its SKILL.md is about 350 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It works with .NET. The repository describes itself as: EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations. The licence is MIT.
When your agent uses it
- Changing dotnet-ef commands
- EFCore.Tools (PMC)
- EFCore.Tasks MSBuild integration
Example prompts
- “/tooling”
What it can do on your machine
Read from SKILL.md and the folder at commit 7adff35. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
dotnet
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Tooling loads about 351 tokens when it runs. Until then it costs about 46 tokens; SKILL.md has 123 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from dotnet/efcore at commit 7adff35, republished under its MIT licence (© dotnet). 123 words, ~351 tokens.
Download SKILL.mdSave it as
.claude/skills/tooling/SKILL.md (or your agent's skills folder).- name
- tooling
- description
- Implementation details for the EF Core dotnet-ef CLI and tooling. Use when changing dotnet-ef commands, the ef wrapper, EFCore.Tools (PMC), or EFCore.Tasks MSBuild integration.
- user-invocable
- false
Tooling
The dotnet ef CLI and Visual Studio Package Manager Console commands for migrations, scaffolding, and compiled models.
dotnet-ef CLI (src/dotnet-ef/)
RootCommand parses global options. Subcommands implemented in src/ef/Commands/. Each invokes MSBuild to build, then shells out via dotnet exec ef.dll, which hosts OperationExecutor.
PMC (src/EFCore.Tools/)
PowerShell module: Add-Migration, Update-Database, Scaffold-DbContext, Optimize-DbContext, etc.
MSBuild Tasks (src/EFCore.Tasks/)
NuGet package Microsoft.EntityFrameworkCore.Tasks provides build/publish-time compiled model and precompiled query generation. Targets in buildTransitive/Microsoft.EntityFrameworkCore.Tasks.targets.
Testing
- CLI tests:
test/dotnet-ef.Tests/,test/ef.Tests/ - EFCore.Tasks has no dedicated test project — for task/target changes, create a test project and manually run
dotnet build/dotnet publishwithEFOptimizeContext=trueto verify
Validation
- For tool changes, create a test project and manually run affected commands to verify behavior
dotnet ef migrations scriptoutput matches expected DDL
© dotnet, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .agents/skills/tooling of dotnet/efcore.
Open the folder on GitHubat commit 7adff35
Compare with similar skills
Tooling next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Tooling this skilldotnet/efcore | 15k | — | ~351 | Automated safety check: Pass | MIT | |
| Minimax DOCXpoco-ai/poco-claw | 1.4k | 7 repos | ~3.9k | Automated safety check: Pass | MIT | |
| Microsoft Skill CreatorMicrosoftDocs/mcp | 1.9k | 3 repos | ~2.1k | Automated safety check: Pass | CC-BY-4.0 | |
| Speckit ConstitutionWeihanLi/WeihanLi.Common | 242 | 11 repos | ~2.1k | Automated safety check: Pass | Apache-2.0 | |
| Copilot Session Failure Analysisdotnet/maui | 23k | — | ~3.4k | Automated safety check: Pass | MIT | |
| Microsoft Code ReferenceMicrosoftDocs/mcp | 1.9k | 4 repos | ~1.1k | Automated safety check: Pass | CC-BY-4.0 |
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- Official
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Speckit Constitution
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Create or update the project constitution from interactive or provided principle inputs, ensuring all dependent templates stay in sync.
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Copilot Session Failure Analysis
dotnet/maui
Mines local Copilot CLI session logs for dotnet/maui to rank costly or failing runs, tag recurring failure modes, propose repo edits and emit guard evals.
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Microsoft Code Reference
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Find working code samples, verify API signatures, and fix Microsoft SDK errors using official docs.
- Official
Update .NET OS Packages
dotnet/core
Audits and updates os-packages.json files listing the Linux packages each .NET release needs per distro, then regenerates the Markdown from the JSON.
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All 17 skills in this repo- Official
Make Skill
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Create and evaluate new Agent Skills for GitHub Copilot. An agent skill from dotnet/efcore.
- Official
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Create custom GitHub Copilot agents. An agent skill from dotnet/efcore.
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Create GitHub Actions workflows for CI, automation, or PR management.
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Create and evaluate VS Code file-based instructions (.instructions.md files).
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Run ApiChief in the EF Core repo to emit baselines, summaries, deltas, review files, or breaking-change checks.
Related
Works with
Questions about Tooling
What does Tooling do?
Implementation details for the EF Core dotnet-ef CLI and tooling. Tooling is an agent skill from dotnet/efcore, published by the product's own GitHub organization. Implementation details for the EF Core dotnet-ef CLI and tooling.
When should I use Tooling?
Tooling fits situations like: changing dotnet-ef commands; EFCore.Tools (PMC); EFCore.Tasks MSBuild integration.
How do I install Tooling in Claude Code?
Run `npx skills add dotnet/efcore --skill tooling -a claude-code`. Or copy the skill folder (.agents/skills/tooling in dotnet/efcore) into .claude/skills/tooling in your project. Claude Code loads it when a task matches its description.
How do I install Tooling in Codex?
Run `npx skills add dotnet/efcore --skill tooling -a codex`. Or copy the skill folder (.agents/skills/tooling in dotnet/efcore) into .agents/skills/tooling in your project. Codex loads it when a task matches its description.
Can I use Tooling in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add dotnet/efcore --skill tooling -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/tooling, .gemini/skills/tooling, .github/skills/tooling and .opencode/skills/tooling in your project.
What does Tooling need to run?
Going by SKILL.md and its folder, Tooling needs the command-line tools its instructions call (dotnet).
Does Tooling access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Tooling safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Tooling use?
Tooling is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Tooling use?
About 351 tokens (SKILL.md is roughly 1.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Tooling?
Skills that share tags, products or a category with Tooling: Minimax DOCX (poco-ai/poco-claw, 1.4k stars), Microsoft Skill Creator (MicrosoftDocs/mcp, 1.9k stars), Speckit Constitution (WeihanLi/WeihanLi.Common, 242 stars) and Copilot Session Failure Analysis (dotnet/maui, 23k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Tooling?
dotnet (a GitHub organization, an official publisher) maintains it in dotnet/efcore, which has 14,800 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 7, 2026.
Source: dotnet/efcore on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.