Function test_skill 

pub fn test_skill(dir: &Path, query: &str) -> Result<TestResult>

Test a skill against a sample user query.

Simulates skill discovery by checking:

1. Whether the description is relevant to the query (word overlap)
2. Whether the skill passes validation (metadata + structure)
3. The estimated token cost

Arguments

• dir - Path to the skill directory
• query - A sample user query to test activation against

Errors

Returns an error if the SKILL.md cannot be read or parsed.