Microsoft Skill Creator
MicrosoftDocs/mcp
Create agent skills for Microsoft technologies using official documentation.
Implementation details for the EF Core Azure Cosmos DB provider.
OfficialMITAuto-check passed
Install Cosmos Provider
$ npx skills add dotnet/efcore --skill cosmos-provider -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install dotnet/efcore cosmos-provider --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/cosmos-provider .claude/skills/cosmos-provider && 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 "cosmos-provider" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/cosmos-provider into .claude/skills/cosmos-provider/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cosmos-provider", 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/cosmos-providerType 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 cosmos-provider -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install dotnet/efcore cosmos-provider --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/cosmos-provider .agents/skills/cosmos-provider && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "cosmos-provider" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/cosmos-provider into .agents/skills/cosmos-provider/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cosmos-provider", 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 cosmos-provider -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install dotnet/efcore cosmos-provider --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/cosmos-provider .cursor/skills/cosmos-provider && 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 "cosmos-provider" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/cosmos-provider into .cursor/skills/cosmos-provider/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cosmos-provider", 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/cosmos-provider--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 cosmos-provider -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install dotnet/efcore cosmos-provider --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/cosmos-provider .gemini/skills/cosmos-provider && 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 "cosmos-provider" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/cosmos-provider into .gemini/skills/cosmos-provider/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cosmos-provider", 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 cosmos-providerInstalls 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 cosmos-provider -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/cosmos-provider .github/skills/cosmos-provider && 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 "cosmos-provider" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/cosmos-provider into .github/skills/cosmos-provider/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cosmos-provider", 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 cosmos-provider -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 cosmos-provider --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/cosmos-provider .opencode/skills/cosmos-provider && 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 "cosmos-provider" agent skill from https://github.com/dotnet/efcore/tree/main/.agents/skills/cosmos-provider into .opencode/skills/cosmos-provider/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cosmos-provider", 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
cosmos-provider- GitHub stars
- 15k
- Token cost
- ~242 tokens
- SKILL.md length
- 85 words
- Files
- 1
- Skills in repo
- 17
- Repo updated
- First seen
- Licence
- MIT
At a glance
Implementation details for the EF Core Azure Cosmos DB provider.
- Changing Cosmos-specific code
- SKILL.md covers Key Differences from Relational and Azure Cosmos DB Emulator for…
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Cosmos Provider is an agent skill from dotnet/efcore, published by the product's own GitHub organization. Implementation details for the EF Core Azure Cosmos DB provider. Use when changing Cosmos-specific code.
Its SKILL.md is about 240 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 Azure Cosmos DB. 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 Cosmos-specific code
Example prompts
- “/cosmos-provider”
What it can do on your machine
Read from SKILL.md and the folder at commit d2f4410. 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
No scripts in the folder and no shell commands in SKILL.md.
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
Cosmos Provider loads about 242 tokens when it runs. Until then it costs about 30 tokens; SKILL.md has 85 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 d2f4410, republished under its MIT licence (© dotnet). 85 words, ~242 tokens.
Download SKILL.mdSave it as
.claude/skills/cosmos-provider/SKILL.md (or your agent's skills folder).- name
- cosmos-provider
- description
- Implementation details for the EF Core Azure Cosmos DB provider. Use when changing Cosmos-specific code.
- user-invocable
- false
Cosmos DB Provider
Non-relational provider with its own parallel query pipeline. Uses JSON for document materialization.
Key Differences from Relational
- No migrations — use
EnsureCreated() - Documents as JSON — owned and complex types become embedded objects
- Partition key configuration required for performance
ETagfor optimistic concurrency- No cross-container joins
Azure Cosmos DB Emulator for Tests
TestEnvironment.InitializeAsync()auto-starts aTestcontainers.CosmosDbcontainer whenTest__Cosmos__DefaultConnectionis not set. Set the env var to use an existing emulator instead.- Skip tests requiring unsupported features on the Linux emulator with
[ConditionalFact(typeof(CosmosTestEnvironment), nameof(CosmosTestEnvironment.IsNotLinuxEmulator))].
© 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/cosmos-provider of dotnet/efcore.
Open the folder on GitHubat commit d2f4410
Compare with similar skills
Cosmos Provider 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 |
|---|---|---|---|---|---|---|
| Cosmos Provider this skilldotnet/efcore | 15k | — | ~242 | Automated safety check: Pass | MIT | |
| Microsoft Skill CreatorMicrosoftDocs/mcp | 1.9k | 3 repos | ~2.1k | Automated safety check: Pass | CC-BY-4.0 | |
| Open Pull RequestGremlinq/ExRam.Gremlinq | 187 | — | ~1.5k | Automated safety check: Pass | MIT | |
| Migrate Dotnet8 To Dotnet9dotnet/skills | 5.6k | 2 repos | ~3.9k | Automated safety check: Pass | MIT | |
| Prepare ReleaseGremlinq/ExRam.Gremlinq | 187 | — | ~1.1k | Automated safety check: Pass | MIT | |
| Azure Cosmosdbalinaqi/maggy | 707 | 1 repos | ~4.5k | Automated safety check: Pass | MIT |
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Related
Works with
Questions about Cosmos Provider
What does Cosmos Provider do?
Implementation details for the EF Core Azure Cosmos DB provider. Cosmos Provider is an agent skill from dotnet/efcore, published by the product's own GitHub organization. Implementation details for the EF Core Azure Cosmos DB provider.
When should I use Cosmos Provider?
Cosmos Provider fits situations like: changing Cosmos-specific code.
How do I install Cosmos Provider in Claude Code?
Run `npx skills add dotnet/efcore --skill cosmos-provider -a claude-code`. Or copy the skill folder (.agents/skills/cosmos-provider in dotnet/efcore) into .claude/skills/cosmos-provider in your project. Claude Code loads it when a task matches its description.
How do I install Cosmos Provider in Codex?
Run `npx skills add dotnet/efcore --skill cosmos-provider -a codex`. Or copy the skill folder (.agents/skills/cosmos-provider in dotnet/efcore) into .agents/skills/cosmos-provider in your project. Codex loads it when a task matches its description.
Can I use Cosmos Provider 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 cosmos-provider -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cosmos-provider, .gemini/skills/cosmos-provider, .github/skills/cosmos-provider and .opencode/skills/cosmos-provider in your project.
What does Cosmos Provider need to run?
SKILL.md names no scripts, command-line tools or credentials: Cosmos Provider is instructions for the agent only.
Does Cosmos Provider 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 Cosmos Provider 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 Cosmos Provider use?
Cosmos Provider 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 Cosmos Provider use?
About 242 tokens (SKILL.md is roughly 968 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 Cosmos Provider?
Skills that share tags, products or a category with Cosmos Provider: Microsoft Skill Creator (MicrosoftDocs/mcp, 1.9k stars), Open Pull Request (Gremlinq/ExRam.Gremlinq, 187 stars), Migrate Dotnet8 To Dotnet9 (dotnet/skills, 5.6k stars) and Prepare Release (Gremlinq/ExRam.Gremlinq, 187 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Cosmos Provider?
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 8, 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.