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testland/stryker-net-mutation

Configures Stryker.NET for mutation testing of .NET Core / .NET Framework projects - installs `dotnet-stryker` global tool, scopes mutation to specific csproj, supports xUnit / NUnit / MSTest, authors `stryker-config.json` with thresholds, runs in CI. Use when a .NET test suite needs mutation-quality verification - closes the .NET ecosystem gap left by Stryker.NET being newer than the JS variant.

80

Quality

100%

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SecuritybySnyk

Passed

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Overview
Quality
Evals
Security
Files

Quality

Content

100%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

The body is concise, highly actionable, and well-structured: executable commands and config, a sequenced multi-step workflow with a worked feedback loop, and a single clearly-signaled one-level-deep reference for the detailed mutator table.

DimensionReasoningScore

Conciseness

The body is lean and step-driven with no padding of concepts Claude already knows (e.g., it does not explain what mutation testing is); every section earns its tokens, deferring the full mutator table to the reference rather than repeating it inline.

3 / 3

Actionability

Provides fully executable, copy-paste-ready commands (`dotnet tool install -g dotnet-stryker`), a complete `stryker-config.json` block, and a concrete CI YAML workflow rather than pseudocode or abstract direction.

3 / 3

Workflow Clarity

A clear six-step sequence is augmented by a worked example with an explicit feedback loop (add a test at `qty == 0`, re-run `dotnet stryker` to kill the mutant and lift the score above the break threshold), and CI gates the build with `--break-at 50` plus `if: always()` artifact upload.

3 / 3

Progressive Disclosure

SKILL.md acts as an overview and signals a single one-level-deep reference ([references/stryker-net-mutators.md](references/stryker-net-mutators.md)) which exists as a real bundle file, with content appropriately split and easy to navigate.

3 / 3

Total

12

/

12

Passed

Description

100%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

The description is specific, complete, and distinct: it enumerates concrete capabilities, provides an explicit 'Use when' trigger, and carves out a clear .NET mutation-testing niche separate from the JS sibling.

DimensionReasoningScore

Specificity

Lists multiple concrete actions such as 'installs `dotnet-stryker` global tool, scopes mutation to specific csproj, supports xUnit / NUnit / MSTest, authors `stryker-config.json` with thresholds, runs in CI', matching the score-3 anchor for multiple specific concrete actions.

3 / 3

Completeness

Explicitly answers both 'what' (the enumerated actions) and 'when' via the explicit trigger 'Use when a .NET test suite needs mutation-quality verification', matching the score-3 anchor.

3 / 3

Trigger Term Quality

Uses natural terms a user would say ('mutation testing', '.NET test suite', 'xUnit / NUnit / MSTest', 'stryker-config.json'), giving good coverage of relevant natural phrasings rather than only technical jargon.

3 / 3

Distinctiveness Conflict Risk

Occupies a clear niche (Stryker.NET mutation testing for .NET) with distinct triggers and even notes it 'closes the .NET ecosystem gap left by Stryker.NET being newer than the JS variant', making conflict with other skills unlikely.

3 / 3

Total

12

/

12

Passed

Validation

100%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation16 / 16 Passed

Validation for skill structure

No warnings or errors.

Reviewed

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