golang-samber-mo
Monadic types for Golang using samber/mo — Option, Result, Either, Future, IO, Task, and State types for type-safe nullable values, error handling, and functional composition with pipeline sub-packages. Apply when using or adopting samber/mo, when the codebase imports `github.com/samber/mo`, or when considering functional programming patterns as a safety design for Golang.
92
92%
Does it follow best practices?
Impact
Pending
No eval scenarios have been run
Passed
No known issues
Quality
Discovery
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.
This is an excellent skill description that clearly identifies a specific library (samber/mo), lists concrete types and capabilities, and provides explicit trigger conditions. It uses proper third-person voice, includes natural keywords users would search for, and occupies a distinct niche that minimizes conflict with other skills.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | Lists multiple specific concrete types (Option, Result, Either, Future, IO, Task, State) and concrete use cases (type-safe nullable values, error handling, functional composition with pipeline sub-packages). Very specific about the library and its capabilities. | 3 / 3 |
Completeness | Clearly answers 'what' (monadic types for Golang using samber/mo with specific type listings and use cases) and 'when' with an explicit 'Apply when...' clause covering three distinct trigger scenarios: using/adopting samber/mo, codebase importing the package, or considering functional programming patterns for Go. | 3 / 3 |
Trigger Term Quality | Includes excellent natural trigger terms: 'samber/mo', 'Golang', 'Option', 'Result', 'Either', 'Future', the full import path 'github.com/samber/mo', 'functional programming patterns', 'monadic types', 'nullable values', 'error handling'. These cover both library-specific and conceptual terms a user would naturally use. | 3 / 3 |
Distinctiveness Conflict Risk | Highly distinctive — targets a specific Go library (samber/mo) with a clear niche in functional programming monadic types. The specific library name, import path, and type names make it very unlikely to conflict with other skills. | 3 / 3 |
Total | 12 / 12 Passed |
Implementation
85%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This is a well-crafted skill that provides actionable, executable guidance for using samber/mo in Go. It excels at progressive disclosure with clear references to detailed sub-documents, and the workflow clarity around when to use direct methods vs sub-package pipes is particularly strong. Minor conciseness improvements could be made by trimming analogies and explanatory text that Claude doesn't need.
Suggestions
Remove or minimize the 'Think of it as...' column in the Core Types table — Claude already knows Rust's Option, Java's Optional, etc.
Trim the persona section and the 'This skill is not exhaustive' disclaimer to save tokens without losing actionability.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The skill is mostly efficient with good code examples and tables, but includes some unnecessary explanations (e.g., 'Think of it as...' column with analogies Claude already knows, the persona section, and some verbose descriptions). The overview table and cross-references add value but the content could be tightened in places. | 2 / 3 |
Actionability | Provides fully executable Go code examples throughout — Option creation, Result chaining, Either pattern matching, Do notation, pipeline sub-packages, JSON structs, database scanning, and map lookups. All examples are copy-paste ready with proper imports and realistic use cases. | 3 / 3 |
Workflow Clarity | The skill clearly sequences when to use direct methods vs sub-package functions vs pipes, with explicit decision rules ('Rule of thumb'). The progression from simple Option/Result usage to Do notation to pipeline composition is well-structured. Since this is primarily a type-selection and composition skill rather than a destructive/batch operation skill, validation checkpoints are less critical. | 3 / 3 |
Progressive Disclosure | Excellent progressive disclosure with a concise overview in the main file and clear one-level-deep references to separate files: Option Reference, Result Reference, Either Reference, Pipelines Reference, Advanced Types Reference, and Monads Guide. Each reference is well-signaled with descriptive link text. | 3 / 3 |
Total | 11 / 12 Passed |
Validation
81%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 9 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
metadata_field | 'metadata' should map string keys to string values | Warning |
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 9 / 11 Passed | |
- Repository
- samber/cc-skills-golang
- Commit
b88f91d
- Reviewed
Table of Contents
Is this your skill?
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.