Conciseness

The body is lean with no padding or explanation of concepts Claude already knows; minor redundancy between the Overview paragraph and the Steps keeps it just below fully efficient.

Actionability

Concrete, specific guidance throughout (e.g., 'Send light cavalry to intercept enemy supply routes', 'Build deep fortifications (深壁)'); instruction-only so absence of code is fine, with only minor gaps in execution detail.

Workflow Clarity

A clear six-step sequence is paired with Decision Points and an explicit Validation section including verification checkpoints ('verify before responding', 'confirm retreat not feigned'); just shy of full feedback-loop error recovery.

Progressive Disclosure

Well-organized single-file skill with clear sections (Overview, Steps, Decision Points, Expected Outcomes, Validation) and no nesting; at ~55 lines it sits just past the simple-skill 5 threshold.

Specificity

Lists multiple concrete actions — 'deep fortification (深壁)', 'supply line interdiction with light cavalry', 'patient refusal of engagement', 'decisive counterattack during retreat' — giving comprehensive coverage of the skill's capabilities.

Completeness

Explicitly answers both what (fortification, interdiction, refusal of engagement, counterattack) and when ('Use when facing a militarily superior enemy or planning attrition warfare') with concrete trigger phrasing.

Trigger Term Quality

Natural triggers like 'militarily superior enemy' and 'attrition warfare' appear in the 'Use when' clause, but coverage lacks synonyms or common variation phrasings a user might say.

Distinctiveness Conflict Risk

Occupies a clear niche (defensive attrition warfare) with distinctive triggers unlikely to overlap with other skills.