Conciseness

The body is lean and efficient with zero padding: no concept explanations, every line is a rule, a compact Good/Bad example, or a checkpoint ('以文言答。技術之實皆存，唯贅言去之。'; 'One 文言 line in, one out.'). It assumes Claude's competence throughout, matching anchor 5 exactly.

Actionability

Fully concrete guidance: Good/Bad example pairs for register, particles, and payload ('每繪新生對象參照，故重繪；以 `useMemo` 包之則免。'), enumerated particles (之, 乃, 為, 其, 則, 故, 以), an explicit verbatim-preservation floor list, enumerated break conditions, and a pre-send checklist. For an instruction-only skill this is specific, executable guidance covering the common cases — anchor 5.

Workflow Clarity

A simple single-task skill whose process is unambiguous and includes an explicit validation checkpoint with a feedback path ('Pre-send check: Identifiers verbatim, original script? Negations present? Two readings? 白話.') plus confirm-first handling for irreversible actions. Under the simple-skill exception this warrants 5; the destructive/batch cap does not apply since no batch or destructive operations are involved.

Progressive Disclosure

The skill is self-contained and well-organized into clear sections (Persistence, Floor, Rules 1–6, When to break, Pre-send check) with no external references needed and no dangling file paths — the body mentions only slash commands, not bundle files. Per the under-50-lines/no-external-references exception, well-organized sections alone earn 5.

Specificity

The description lists several concrete behavior traits ('文言文 register, far fewer characters, technical terms verbatim') plus invocation and lifecycle details ('Invoke only with /megacave or /caveman wenyan. Stays on until "stop caveman" or "normal mode"'), matching anchor 4 — several specific actions with minor gaps in coverage (e.g., break rules and fallback behavior are not mentioned). It exceeds anchor 3 (which requires only 1–2 concrete actions) but is not comprehensive enough for anchor 5.

Completeness

It clearly answers both: what it does ('Caveman in Classical Chinese: 文言文 register, far fewer characters, technical terms verbatim') and when to use it, with an explicit trigger clause ('Invoke only with /megacave or /caveman wenyan'). This matches anchor 5 — both what and when are explicit with concrete trigger phrases.

Trigger Term Quality

Good keyword coverage with natural terms a user would say: 'caveman', 'Classical Chinese', '文言文', and the explicit commands '/megacave' and '/caveman wenyan'. A few natural synonyms are missing (e.g., '文言' standalone, 'literary Chinese', 'wenyan mode'), so it fits anchor 4 rather than the comprehensive coverage of anchor 5.

Distinctiveness Conflict Risk

A clear niche (Classical Chinese register mode) with a unique name and restrictive 'Invoke only with' phrasing that prevents accidental triggering, matching anchor 5 — distinct triggers with minimal conflict risk with any other skill.