.NET API Compatibility Design
Aaronontheweb/dotnet-skills
Applies extend-only design rules to NuGet packages and distributed systems, covering source, binary and wire compatibility and how to deprecate members safely.
Place validation in the correct one of our three scopes in the .NET API — API contract (no DB), Application business via Kommand IValidator, or Domain invariants that throw.
Install Validation Scopes
$ npx skills add atherio-danp/cde-dotnetcc --skill validation-scopes -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install atherio-danp/cde-dotnetcc validation-scopes --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/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/validation-scopes .claude/skills/validation-scopes && 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 "validation-scopes" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/validation-scopes into .claude/skills/validation-scopes/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validation-scopes", 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/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/validation-scopesType 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 atherio-danp/cde-dotnetcc --skill validation-scopes -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install atherio-danp/cde-dotnetcc validation-scopes --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/validation-scopes .agents/skills/validation-scopes && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "validation-scopes" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/validation-scopes into .agents/skills/validation-scopes/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validation-scopes", 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 atherio-danp/cde-dotnetcc --skill validation-scopes -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install atherio-danp/cde-dotnetcc validation-scopes --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/validation-scopes .cursor/skills/validation-scopes && 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 "validation-scopes" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/validation-scopes into .cursor/skills/validation-scopes/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validation-scopes", 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/atherio-danp/cde-dotnetcc.git --path .claude/skills/validation-scopes--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 atherio-danp/cde-dotnetcc --skill validation-scopes -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install atherio-danp/cde-dotnetcc validation-scopes --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/validation-scopes .gemini/skills/validation-scopes && 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 "validation-scopes" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/validation-scopes into .gemini/skills/validation-scopes/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validation-scopes", 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 atherio-danp/cde-dotnetcc validation-scopesInstalls 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 atherio-danp/cde-dotnetcc --skill validation-scopes -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/validation-scopes .github/skills/validation-scopes && 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 "validation-scopes" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/validation-scopes into .github/skills/validation-scopes/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validation-scopes", 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 atherio-danp/cde-dotnetcc --skill validation-scopes -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install atherio-danp/cde-dotnetcc validation-scopes --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/atherio-danp/cde-dotnetcc.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/validation-scopes .opencode/skills/validation-scopes && 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 "validation-scopes" agent skill from https://github.com/atherio-danp/cde-dotnetcc/tree/main/.claude/skills/validation-scopes into .opencode/skills/validation-scopes/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "validation-scopes", 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
validation-scopes- GitHub stars
- 109
- Token cost
- ~927 tokens
- SKILL.md length
- 346 words
- Files
- 1
- Skills in repo
- 13
- Repo updated
- First seen
- Licence
- None found
At a glance
Place validation in the correct one of our three scopes in the .NET API — API contract (no DB), Application business via Kommand IValidator, or Domain invariants that throw.
- Works in 3 steps: Is it pure shape / required-field /… → Does it need data or business… → Is it an invariant that must hold for…
- Adding any validation/guard
- SKILL.md covers Procedure — placing a check and Don'ts
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Validation Scopes is an agent skill from atherio-danp/cde-dotnetcc. Place validation in the correct one of our three scopes in the .NET API — API contract (no DB), Application business via Kommand IValidator, or Domain invariants that throw. Use when adding any validation/guard, or deciding where a check belongs.
Its SKILL.md is about 930 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Backend & APIs, covering API design. It works with .NET. The repository describes itself as: Claude Code harness for .NET developers.
When your agent uses it
- Adding any validation/guard
- Deciding where a check belongs
Example prompts
- “/validation-scopes”
Requirements
- Pre-approved tools (allowed-tools): Read, Glob, Grep, Edit, Write, Bash, Skill, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__serena__find_symbol, mcp__serena__find_referencing_symbols, mcp__serena__find_declaration, mcp__serena__find_implementations, mcp__serena__search_for_pattern, mcp__serena__get_diagnostics_for_file, mcp__serena__list_dir, mcp__serena__find_file, mcp__serena__create_text_file, mcp__serena__replace_symbol_body, mcp__serena__insert_after_symbol, mcp__serena__insert_before_symbol, mcp__serena__replace_content, mcp__serena__rename_symbol, mcp__serena__safe_delete_symbol
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- Is it pure shape / required-field / JWT-derivable authz, with no DB? → Contract (API). Hand-roll the
- Does it need data or business understanding? → Business. Add a IValidator beside the
- Is it an invariant that must hold for the object to exist or change? → Invariant. Enforce it inside
What it can do on your machine
Read from SKILL.md and the folder at commit c72a3f9. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
ReadGlobGrepEditWriteBashSkillmcp__serena__initial_instructionsmcp__serena__get_symbols_overviewmcp__serena__find_symbol
…and 14 more on the same allowed-tools line.
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
Validation Scopes loads about 927 tokens when it runs. Until then it costs about 66 tokens; SKILL.md has 346 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: notes
The automated check noted patterns worth knowing about, such as sudo or a known installer.
- NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
allowed-tools: Read, Glob, Grep, Edit, Write, Bash, Skill, mcp__serena__initial_instructions, mcp__serena__get_symb
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
Without a licence we can't republish the file, so here is its outline and opening line. It has 346 words (~927 tokens).
“Validation is three distinct concerns; put each check in the right one. Source of truth (the facts — read them): .claude/rules/backend/api-design.md (§4.1), cqrs-kommand.md, domain-model.md, and docs/projectStandards/backend-architecture.md §4.1. We do NOT use FluentValidation or any validation library. C# (.cs) edits via…”
- name
- validation-scopes
- allowed-tools
- Read, Glob, Grep, Edit, Write, Bash, Skill, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__serena__find_symbol, mcp__serena__find_referencing_symbols, mcp__serena__find_declaration, mcp__serena__find_implementations, mcp__serena__search_for_pattern, mcp__serena__get_diagnostics_for_file, mcp__serena__list_dir, mcp__serena__find_file, mcp__serena__create_text_file, mcp__serena__replace_symbol_body, mcp__serena__insert_after_symbol, mcp__serena__insert_before_symbol, mcp__serena__replace_content, mcp__serena__rename_symbol, mcp__serena__safe_delete_symbol
Files
Just SKILL.md in .claude/skills/validation-scopes of atherio-danp/cde-dotnetcc.
Open the folder on GitHubat commit c72a3f9
Compare with similar skills
Validation Scopes 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 |
|---|---|---|---|---|---|---|
| Validation Scopes this skillatherio-danp/cde-dotnetcc | 109 | — | ~927 | Automated safety check: Notes | None | |
| .NET API Compatibility DesignAaronontheweb/dotnet-skills | 1.2k | 2 repos | ~2.7k | Automated safety check: Pass | MIT | |
| .NET Aspire Explicit ConfigurationAaronontheweb/dotnet-skills | 1.2k | 1 repos | ~1.3k | Automated safety check: Pass | MIT | |
| Csharp Nullable Reference TypesAaronontheweb/dotnet-skills | 1.2k | 1 repos | ~2.9k | Automated safety check: Pass | MIT | |
| Generate Testability Wrappersdotnet/skills | 5.6k | 1 repos | ~3.9k | Automated safety check: Pass | MIT | |
| SDK Conventionsaws/aws-sdk-net | 145 | — | ~6.3k | Automated safety check: Pass | Apache-2.0 |
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Related
Works with
Categories
Questions about Validation Scopes
What does Validation Scopes do?
Place validation in the correct one of our three scopes in the .NET API — API contract (no DB), Application business via Kommand IValidator, or Domain invariants that throw. Validation Scopes is an agent skill from atherio-danp/cde-dotnetcc.NET API — API contract (no DB), Application business via Kommand IValidator, or Domain invariants that throw.
When should I use Validation Scopes?
Validation Scopes fits situations like: adding any validation/guard; deciding where a check belongs.
How do I install Validation Scopes in Claude Code?
Run `npx skills add atherio-danp/cde-dotnetcc --skill validation-scopes -a claude-code`. Or copy the skill folder (.claude/skills/validation-scopes in atherio-danp/cde-dotnetcc) into .claude/skills/validation-scopes in your project. Claude Code loads it when a task matches its description.
How do I install Validation Scopes in Codex?
Run `npx skills add atherio-danp/cde-dotnetcc --skill validation-scopes -a codex`. Or copy the skill folder (.claude/skills/validation-scopes in atherio-danp/cde-dotnetcc) into .agents/skills/validation-scopes in your project. Codex loads it when a task matches its description.
Can I use Validation Scopes 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 atherio-danp/cde-dotnetcc --skill validation-scopes -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/validation-scopes, .gemini/skills/validation-scopes, .github/skills/validation-scopes and .opencode/skills/validation-scopes in your project.
What does Validation Scopes need to run?
SKILL.md names no scripts, command-line tools or credentials: Validation Scopes is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Glob, Grep, Edit, Write, Bash, Skill, mcp__serena__initial_instructions, mcp__serena__get_symbols_overview, mcp__serena__find_symbol, mcp__serena__find_referencing_symbols, mcp__serena__find_declaration, mcp__serena__find_implementations, mcp__serena__search_for_pattern, mcp__serena__get_diagnostics_for_file, mcp__serena__list_dir, mcp__serena__find_file, mcp__serena__create_text_file, mcp__serena__replace_symbol_body, mcp__serena__insert_after_symbol, mcp__serena__insert_before_symbol, mcp__serena__replace_content, mcp__serena__rename_symbol, mcp__serena__safe_delete_symbol.
Does Validation Scopes 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 Validation Scopes safe to install?
Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.
What licence does Validation Scopes use?
No licence was found for Validation Scopes or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Validation Scopes use?
About 927 tokens (SKILL.md is roughly 3.7k 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 Validation Scopes?
Skills that share tags, products or a category with Validation Scopes: .NET API Compatibility Design (Aaronontheweb/dotnet-skills, 1.2k stars), .NET Aspire Explicit Configuration (Aaronontheweb/dotnet-skills, 1.2k stars), Csharp Nullable Reference Types (Aaronontheweb/dotnet-skills, 1.2k stars) and Generate Testability Wrappers (dotnet/skills, 5.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Validation Scopes?
atherio-danp (a GitHub user) maintains it in atherio-danp/cde-dotnetcc, which has 109 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on July 26, 2026.
Source: atherio-danp/cde-dotnetcc on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.