Minimax DOCX
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Professional DOCX document creation, editing, and formatting using OpenXML SDK (.NET).
Write and simplify C property-based, model-based, and executable specification tests with CsCheck.
MITAuto-check passed
Install Cscheck
$ npx skills add Aaronontheweb/dotnet-skills --skill cscheck -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Aaronontheweb/dotnet-skills cscheck --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/Aaronontheweb/dotnet-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/cscheck .claude/skills/cscheck && 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 "cscheck" agent skill from https://github.com/Aaronontheweb/dotnet-skills/tree/master/skills/cscheck into .claude/skills/cscheck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cscheck", 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/Aaronontheweb/dotnet-skills/tree/master/skills/cscheckType 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 Aaronontheweb/dotnet-skills --skill cscheck -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Aaronontheweb/dotnet-skills cscheck --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Aaronontheweb/dotnet-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/cscheck .agents/skills/cscheck && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "cscheck" agent skill from https://github.com/Aaronontheweb/dotnet-skills/tree/master/skills/cscheck into .agents/skills/cscheck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cscheck", 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 Aaronontheweb/dotnet-skills --skill cscheck -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Aaronontheweb/dotnet-skills cscheck --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Aaronontheweb/dotnet-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/cscheck .cursor/skills/cscheck && 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 "cscheck" agent skill from https://github.com/Aaronontheweb/dotnet-skills/tree/master/skills/cscheck into .cursor/skills/cscheck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cscheck", 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/Aaronontheweb/dotnet-skills.git --path skills/cscheck--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 Aaronontheweb/dotnet-skills --skill cscheck -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Aaronontheweb/dotnet-skills cscheck --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Aaronontheweb/dotnet-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/cscheck .gemini/skills/cscheck && 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 "cscheck" agent skill from https://github.com/Aaronontheweb/dotnet-skills/tree/master/skills/cscheck into .gemini/skills/cscheck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cscheck", 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 Aaronontheweb/dotnet-skills cscheckInstalls 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 Aaronontheweb/dotnet-skills --skill cscheck -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Aaronontheweb/dotnet-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/cscheck .github/skills/cscheck && 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 "cscheck" agent skill from https://github.com/Aaronontheweb/dotnet-skills/tree/master/skills/cscheck into .github/skills/cscheck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cscheck", 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 Aaronontheweb/dotnet-skills --skill cscheck -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Aaronontheweb/dotnet-skills cscheck --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Aaronontheweb/dotnet-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/cscheck .opencode/skills/cscheck && 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 "cscheck" agent skill from https://github.com/Aaronontheweb/dotnet-skills/tree/master/skills/cscheck into .opencode/skills/cscheck/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cscheck", 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
cscheck- GitHub stars
- 1.2k
- Token cost
- ~1.2k tokens
- SKILL.md length
- 549 words
- Files
- 5 (incl. references)
- Skills in repo
- 35
- Repo updated
- First seen
- Licence
- MIT
At a glance
Write and simplify C property-based, model-based, and executable specification tests with CsCheck.
- Stateful command sequences
- SKILL.md covers Choose the test shape, Establish the contract first, Keep the test machinery small and Verify the right thing, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Spec guards and rules
What it does
Cscheck is an agent skill from Aaronontheweb/dotnet-skills. Write and simplify C property-based, model-based, and executable specification tests with CsCheck. Use for generators, shrinking, stateful command sequences, Spec guards and rules, implementation conformance, or replaying generated failures.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `references/failures.md`, `references/properties.md` and `references/specifications.md`).
It works with C#. The repository describes itself as: Claude Code skills and sub-agents for .NET Developers. The licence is MIT.
When your agent uses it
- Stateful command sequences
- Spec guards and rules
- Implementation conformance
- Replaying generated failures
Example prompts
- “/cscheck”
What it can do on your machine
Read from SKILL.md and the folder at commit 46003af. 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
Links to these hosts (documentation or services it may open):
github.comnuget.org
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
Cscheck loads about 1.2k tokens when it runs, and up to ~8.3k if it reads all its reference files. Until then it costs about 63 tokens; SKILL.md has 549 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 Aaronontheweb/dotnet-skills at commit 46003af, republished under its MIT licence (© Aaronontheweb). 549 words, ~1,169 tokens.
Download SKILL.mdSave it as
.claude/skills/cscheck/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.- name
- cscheck
- description
- Write and simplify C# property-based, model-based, and executable specification tests with CsCheck. Use for generators, shrinking, stateful command sequences, Spec guards and rules, implementation conformance, or replaying generated failures.
CsCheck
Use CsCheck to explore inputs and action sequences; keep the application's contract visible in the test. Let the library generate, shrink, print, and replay counterexamples. Start with the smallest test that can falsify the claim, rather than building a testing framework around CsCheck.
Choose the test shape
| What needs checking | Start with | Read when needed |
|---|---|---|
| A function, round trip, algebraic law, or data transformation | Gen + Sample | Properties and generators |
| An implementation with a simpler reference representation | SampleModelBased / SampleModelBasedAsync | Stateful and async tests |
| A protocol or lifecycle with explicit state, guards, and requirements | Spec.From, then Exhaustive and Conform | Executable specifications |
| Async resources or expectations that must incorporate observed outcomes | Generated command arrays + SampleAsync, with cleanup inside each case | Stateful and async tests |
| A failing property, seed replay, or a before/after bug demonstration | Native sampling controls and a concrete regression | Failure discovery and replay |
Read only the references needed for the task. These examples use xUnit, but CsCheck itself is test-framework independent. Preserve the project's existing framework and package-management conventions.
Establish the contract first
Identify an observable requirement and a plausible wrong result it would reject. Separate generated inputs, expected behavior, and actual observations. A model may consume observations, but must validate them against prior expectations before accepting them as new state. Do not use the implementation's answer to manufacture its expected answer.
Generate individual operations and their arguments, allowing CsCheck to compose arbitrary sequences. Finite domains, weighted boundary values, and preconditions are legitimate modeling choices. Handwritten whole scenarios are useful regressions, but are not a substitute for exploring action orderings.
Keep rejected requests testable when rejection is part of the contract. A guard saying “only withdraw when funds exist” cannot test insufficient-funds rejection. Preconditions describe what can be attempted; postconditions describe the response, including allowed failures.
Show full SKILL.md (253 more words)Show less
Keep the test machinery small
- Prefer composed
Genvalues toRandom, hand-chosen seed lists, custom shrinkers, or retries-until-green. - Construct a fresh mutable implementation and model for each generated case, including shrinking.
- Use ordinary records, direct calls, and meaningful comparisons.
equal:must compare behavior or state; cleanup belongs infinally/using, not an equality predicate that always returns true. - Keep seeds out of ordinary discovery runs. Replay a seed emitted by a failure, then pin concrete inputs when the regression must survive generator changes.
- Preserve domain coverage and historical counterexamples when simplifying. Fewer lines alone do not establish that the replacement checks the same behavior.
Verify the right thing
Spec.Exhaustive checks the model. Spec.Conform checks the real implementation through the adapter
and only for sampled traces and compared observations. Keep both claims explicit. Inspect unreachable
requirements, deadlocks, and search cutoffs; a green run can be vacuous.
When practical, show that the test rejects a known broken implementation or a small deliberate defect in an isolated copy. Compile and execute examples rather than assuming similarly named FsCheck APIs exist in CsCheck. Reuse native model-based APIs when their independent transitions and comparison fit; a custom async loop is a useful alternative, not a universal replacement.
API baseline
The linked examples were compiled and run with CsCheck 4.9.1 on .NET 8. Its package identifies
source revision 5050355.
Check the installed package before adapting signatures. For upgrades, verify the
NuGet package and upstream source; do not infer a major version
or native async Spec.Conform support from another library's API.
© Aaronontheweb, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 4 other files (references) in skills/cscheck of Aaronontheweb/dotnet-skills.
- SKILL.md
- references/failures.md
- references/properties.md
- references/specifications.md
- references/stateful-and-async.md
Open the folder on GitHubat commit 46003af
Compare with similar skills
Cscheck 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 |
|---|---|---|---|---|---|---|
| Cscheck this skillAaronontheweb/dotnet-skills | 1.2k | — | ~1.2k | Automated safety check: Pass | MIT | |
| Minimax DOCXpoco-ai/poco-claw | 1.4k | 7 repos | ~3.9k | Automated safety check: Pass | MIT | |
| Speckit ConstitutionWeihanLi/WeihanLi.Common | 242 | 11 repos | ~2.1k | Automated safety check: Pass | Apache-2.0 | |
| Code Audit3stoneBrother/code-audit | 892 | 1 repos | ~2.7k | Automated safety check: Pass | None | |
| Analyzing .NET Performancedotnet/skills | 5.6k | 3 repos | ~3.1k | Automated safety check: Pass | MIT | |
| Build Teaql Appteaql/teaql-agent-kit | 2.8k | — | ~4.6k | Automated safety check: Pass | MIT |
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Works with
Questions about Cscheck
What does Cscheck do?
Write and simplify C property-based, model-based, and executable specification tests with CsCheck. Cscheck is an agent skill from Aaronontheweb/dotnet-skills. Write and simplify C property-based, model-based, and executable specification tests with CsCheck.
When should I use Cscheck?
Cscheck fits situations like: stateful command sequences; spec guards and rules; implementation conformance; replaying generated failures.
How do I install Cscheck in Claude Code?
Run `npx skills add Aaronontheweb/dotnet-skills --skill cscheck -a claude-code`. Or copy the skill folder (skills/cscheck in Aaronontheweb/dotnet-skills) into .claude/skills/cscheck in your project. Claude Code loads it when a task matches its description.
How do I install Cscheck in Codex?
Run `npx skills add Aaronontheweb/dotnet-skills --skill cscheck -a codex`. Or copy the skill folder (skills/cscheck in Aaronontheweb/dotnet-skills) into .agents/skills/cscheck in your project. Codex loads it when a task matches its description.
Can I use Cscheck 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 Aaronontheweb/dotnet-skills --skill cscheck -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cscheck, .gemini/skills/cscheck, .github/skills/cscheck and .opencode/skills/cscheck in your project.
What does Cscheck need to run?
SKILL.md names no scripts, command-line tools or credentials: Cscheck is instructions for the agent only.
Does Cscheck access the network?
SKILL.md names 2 domains. As links in the text: github.com and nuget.org. This is read from the text; nothing was executed.
Is Cscheck 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 Cscheck use?
Cscheck 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 Cscheck use?
About 1.2k tokens (SKILL.md is roughly 4.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 7.1k tokens, read only when the agent opens those files.
What are the alternatives to Cscheck?
Skills that share tags, products or a category with Cscheck: Minimax DOCX (poco-ai/poco-claw, 1.4k stars), Speckit Constitution (WeihanLi/WeihanLi.Common, 242 stars), Code Audit (3stoneBrother/code-audit, 892 stars) and Analyzing .NET Performance (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 Cscheck?
Aaronontheweb (a GitHub user) maintains it in Aaronontheweb/dotnet-skills, which has 1,206 GitHub stars. The repository holds 35 skills in this directory. The repository was last updated on October 10, 2026.
Source: Aaronontheweb/dotnet-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.