Conciseness

The body restates textbook knowledge Claude already knows ("Each function should do one thing well", "Measure first: Profile before optimizing", DRY, fail fast, high cohesion/low coupling) and contains several near-duplicate bullets ("Use meaningful, descriptive names" vs "Use descriptive names; single-letter names..."; "Use early returns to reduce nesting" vs the following bullet; "Optimize only after measurable bottlenecks are identified" restating the two bullets above it). This matches anchor 2 ("noticeably verbose; several unnecessary explanations or padded sections") rather than anchor 3, where redundancy would be occasional rather than systematic.

Actionability

Some bullets give concrete, executable guidance ("Use parameterized queries (prepared statements) for all database access", "Mask or exclude passwords, tokens, PII from logs", "Inject external dependencies as parameters"), but many others are abstract directives with no specifics or examples ("Keep the codebase lean and focused", "High cohesion within modules, low coupling between"). This fits anchor 3 ("some concrete guidance but incomplete") for an instruction-only skill; it is not anchor 4 because much of the guidance lacks operational detail or good/bad examples.

Workflow Clarity

This is a principles reference, not a process skill, and the quasi-workflows present are partially validated: Safe Refactoring sequences small steps with "Run tests after each change", and Reference Representativeness gives a procedure with an explicit stop condition. However there is no coherent overall workflow and checkpoints elsewhere (e.g. refactoring triggers, comment test) are implicit, matching anchor 3 ("steps listed but validation gaps") rather than anchor 4.

Progressive Disclosure

The body is organized into clear sections with two real, one-level-deep references that are signaled with read conditions ("read when implementing, reviewing, or fixing React/TypeScript code"; "For concrete detection patterns used by security review, see references/security-checks.md"), and specialized content is appropriately split out. It falls short of anchor 5 because the security-checks link is buried mid-body while the References section lists only frontend.md, and frontend.md itself points to another skill's file, creating minor navigation inconsistency.

Specificity

"Language-agnostic coding principles for maintainability, readability, and quality" names the domain and three quality attributes but offers no concrete actions or deliverables. It sits above anchor 2 ("actions minimal or generic") because the scope attributes add specificity, but below anchor 4, which requires several specific listed actions.

Completeness

Both what ("coding principles for maintainability, readability, and quality") and when (explicit "Use when..." with three trigger phrases) are present, satisfying anchor 4. It falls short of anchor 5 because the 'what' remains abstract — no concrete capabilities or principle areas are enumerated to pair with the concrete triggers.

Trigger Term Quality

"Use when implementing features, refactoring code, or reviewing code quality" provides natural phrases users would say, matching anchor 4's "good keyword coverage; a few natural terms missing". It is not anchor 5 because common variations like "writing code", "clean code", "code style", or "code review" are absent.

Distinctiveness Conflict Risk

Triggers on "implementing features" and "refactoring code" cover nearly all coding work, creating high overlap with any code-style, review, or refactoring skill, which matches anchor 2 ("very broad; high overlap risk"). It does not reach anchor 3 because the scoped "language-agnostic coding principles" framing still does not carve a genuinely distinct niche from general coding-assistant skills.