Conciseness

Lean with no padding or over-explanation of what translation is; minor redundancy between 触发条件, 功能说明, and 翻译规则 sections and a duplicated example could be tightened.

Actionability

Concrete, specific routing guidance (中文→英文, 英文→中文, other→中文) with concrete I/O examples covering the common cases, but language detection is left as vague "自动识别" with no named mechanism.

Workflow Clarity

Single-purpose, non-destructive, non-batch skill where the simple-skill exception applies; steps 1–5 are a clear, unambiguous sequence with no risky operations needing validation.

Progressive Disclosure

Under 50 lines with no need for external references and well-organized sections (触发条件, 功能说明, 使用示例, 翻译规则), matching the simple-skill exception for progressive disclosure.

Specificity

Names the trigger ("fy "), concrete behavior (中英互译, other languages → 中文), and a worked example, but coverage is limited to a single translate action rather than multiple specific actions.

Completeness

Explicitly answers both 'what' (中英互译, other → 中文) and 'when' (input starting with "fy ", with a concrete example "fy test" → "测试").

Trigger Term Quality

The trigger is the custom command prefix "fy", which is a technical jargon-style token rather than natural phrases a user would say when needing translation (e.g. "translate this", "翻译").

Distinctiveness Conflict Risk

The dedicated "fy" prefix trigger carves a clear niche with minimal overlap risk; not a 5 because the underlying translation task is a common capability that could overlap with general tools.