Conciseness

Dense imperative prose that assumes Claude's competence (no explanations of what fog of war, Three.js, or shaders are); every line is actionable guidance and nothing is padded.

Actionability

Highly concrete instructions (e.g., "quantize them into a one-row red-channel texture", "Combine radial and obstacle fog with `max`, then cap final opacity", "Disable depth test, depth write, and tone mapping"); per the instruction-only scoring note, the absence of code is not penalized when guidance is this specific.

Workflow Clarity

A clearly sequenced dependency-ordered implementation flow (steps 1–5), a tuning order with "until" feedback loops, and an explicit Validate checklist with concrete checkpoints cover the full process.

Progressive Disclosure

SKILL.md is a focused overview with two well-signaled one-level-deep references (mechanics.md, validation.md) that are real bundle files, making navigation easy and keeping detail off the main page.

Specificity

Four concrete verbs ("Implement, tune, debug, or validate") plus a comprehensive enumeration of sub-capabilities (visibility masks, line of sight, vision ranges, targeting rules, shader artifacts, ray budgets, lifecycle integration, deterministic tests) give full coverage rather than minor gaps.

Completeness

It explicitly answers both "what" (implement/tune/debug/validate soft wall-aware fog of war and gameplay perception in Three.js action games) and "when" via a concrete "Use for ..." trigger clause enumerating real scenarios.

Trigger Term Quality

Natural terms a Three.js game developer would actually say are covered comprehensively, including synonyms: "fog of war", "line of sight", "vision ranges", "fog shader", "spokes or seams", and "ray budgets".

Distinctiveness Conflict Risk

A narrow niche (fog of war in Three.js action games) with highly specific triggers makes overlap with other skills minimal and accidental triggering unlikely.