smart-mutation-operator-generator
Generates domain-specific mutation operators beyond the standard arithmetic/relational set — mutations tailored to your codebase's idioms, APIs, and bug history that standard tools don't try. Use when generic mutation testing plateaus, when your domain has specific failure modes, or when mining bug history reveals patterns standard operators miss.
Install with Tessl CLI
npx tessl i github:santosomar/general-secure-coding-agent-skills --skill smart-mutation-operator-generator90
Quality
88%
Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Discovery
85%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This is a strong skill description that clearly articulates a specialized capability with explicit trigger conditions. It effectively communicates both the unique value proposition (domain-specific mutations vs standard operators) and when to apply it. The main weakness is slightly technical language that may not match how all users naturally phrase requests.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists specific concrete actions: 'generates domain-specific mutation operators', 'mutations tailored to your codebase's idioms, APIs, and bug history'. Clearly describes what the skill produces and how it differs from standard tools. | 3 / 3 |
Completeness | Clearly answers both what ('generates domain-specific mutation operators beyond standard set') and when ('Use when generic mutation testing plateaus, when your domain has specific failure modes, or when mining bug history reveals patterns'). Explicit 'Use when...' clause with multiple trigger scenarios. | 3 / 3 |
Trigger Term Quality | Includes relevant terms like 'mutation testing', 'mutation operators', 'bug history', but uses somewhat technical jargon. Missing more natural variations users might say like 'custom mutations', 'test mutations', or 'mutant generation'. | 2 / 3 |
Distinctiveness Conflict Risk | Highly specific niche: domain-specific mutation operators for mutation testing. Clear differentiation from generic testing skills or standard mutation testing tools. Unlikely to conflict with other skills due to specialized focus. | 3 / 3 |
Total | 11 / 12 Passed |
Implementation
92%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a high-quality skill that provides concrete, actionable guidance for generating custom mutation operators. It excels at actionability with real code examples and workflow clarity with explicit validation criteria. The content is appropriately dense without unnecessary explanation, though the length suggests some content could be split into reference files.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is dense with actionable information and avoids explaining concepts Claude already knows. Tables are used efficiently to convey comparisons, and every section adds unique value without padding. | 3 / 3 |
Actionability | Provides fully executable code examples (mutmut_config.py with real Python), specific bash commands for mining bug history, and concrete operator patterns. The implementation section is copy-paste ready. | 3 / 3 |
Workflow Clarity | Clear multi-step process: mine bugs → identify inverse patterns → implement operators → validate with 4 explicit criteria → dry run → adopt. The validation section provides explicit checkpoints before adding operators permanently. | 3 / 3 |
Progressive Disclosure | Content is well-organized with clear sections and tables, but it's a substantial monolithic document (~150 lines). The domain-specific operator catalog and implementation details could potentially be split into separate reference files for better navigation. | 2 / 3 |
Total | 11 / 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.
Validation — 11 / 11 Passed
Validation for skill structure
No warnings or errors.
- Reviewed
Table of Contents
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