Conciseness

The body is short and mostly on-task, but includes unnecessary material: the opening paragraph explains why per-element listeners are costly (basic knowledge Claude already has) and is duplicated verbatim in references/rule.md's "Why It Matters"; the "Quick Reference" bullets restate that intro; and the "Code Review" section near-verbatim repeats the frontmatter description including its garbled "related to Use event delegation for dynamic content" clause. Not a 2 since there is no heavily padded section, and not a 4 because these are clear trim candidates.

Actionability

There is concrete guidance — the detection heuristic ("attaches the same event handler to multiple elements in a loop"), the specific API ("event.target.closest()"), and the refactor target ("event delegation on the common parent container") — but the body contains no executable code; all implementation examples are deferred to references/rule.md, leaving the Fix step as a single abstract sentence. More than high-level hints (not a 2), but missing the executable detail expected of a JavaScript refactoring skill (not a 4).

Workflow Clarity

The Check → Fix → Explain → Code Review sections form a clear, coherent review sequence, and the Code Review section requires stating "how the change should be verified in the browser", giving an explicit verification checkpoint. Not a 5 because the actual verification steps are deferred to rule.md rather than stated inline and there is no error-recovery loop; not a 3 because the sequence is explicit and verification is required, not merely implicit, and no destructive/batch cap applies.

Progressive Disclosure

The body is a concise overview that appropriately splits all implementation detail (code examples, nested-element handling with closest(), when NOT to delegate, verification steps) into the single, real, one-level-deep references/rule.md file, clearly signaled with its purpose: "For full implementation details, code examples, and framework-specific guidance, see references/rule.md". No nested references, easy navigation.

Specificity

The description names the domain ("related to Use event delegation for dynamic content") and one or two concrete actions — "reviewing scripts, client components, bundles, or runtime behavior" and "Inspect both source code and the browser execution path" — but stops short of listing several specific actions (e.g., flagging per-element listeners in loops, suggesting the delegated alternative), so it is not comprehensive.

Completeness

Both elements are explicitly present: the "when" via "Use when reviewing scripts, client components, bundles, or runtime behavior related to..." and the "what" via "Inspect both source code and the browser execution path so fixes target the real bottleneck or bug". Not a 5 because the "what" describes the inspection approach rather than the skill's actual operation (flag/refactor to delegation), and the embedded capitalized rule title makes the sentence garbled rather than a clear concrete statement.

Trigger Term Quality

Good keyword coverage with natural terms a user would say: "event delegation", "dynamic content", "scripts", "bundles", "runtime behavior", "browser execution path". A few common natural terms are missing, such as "event listeners", "addEventListener", or "click handlers", which keeps it below comprehensive synonym-level coverage.

Distinctiveness Conflict Risk

The opening trigger clause ("reviewing scripts, client components, bundles, or runtime behavior") is generic template language that would fire on almost any JavaScript review request and overlaps heavily with sibling frontendchecklist rules sharing this phrasing; distinctiveness rests solely on the embedded "event delegation for dynamic content" niche. It is more specific than a broadly generic description (not a 2), but the overlap risk with similarly templated JS review skills exceeds the "minor" threshold of a 4.