Content is lean and example-driven — code blocks dominate with minimal tactical prose ('By default, tweens are appended', 'Third argument ... controls placement') and no explanation of concepts Claude already knows; not 2 because nearly every token earns its place, with only slight redundancy in the Best practices/Do Not sections.

Provides fully executable, copy-paste-ready code throughout — timeline creation, position-parameter examples with inline comments, addLabel/tweenFromTo, nesting via master.add(child, 0), and concrete playback controls; matches the anchor for specific executable examples.

A well-sequenced reference catalog organized by feature (Creating, Position Parameter, Defaults, Labels, Nesting, Playback) with clear sectioning; per the simple-skills note, no destructive/batch process requires validation checkpoints here, and the organization is unambiguous.

A single self-contained file with clearly organized sections and a 'Related skills' pointer to siblings, no nested multi-level references and no misplaced inline reference content; not 2 because navigation is easy and structure is appropriate for the scope.

Lists multiple concrete capabilities — 'gsap.timeline(), position parameter, nesting, playback' and 'sequencing animations, choreographing keyframes' — matching the anchor for multiple specific concrete actions; not 2 because actions are comprehensive rather than partial.

Explicitly states what the skill does ('Official GSAP skill for timelines — ...') and when to use it via an explicit 'Use when ...' clause, satisfying the anchor for both what AND when.

Natural terms users would say are well covered — 'sequencing animations', 'animation sequencing, timelines, or animation order', 'in GSAP or when recommending a library that supports timelines'; not 2 because several common variations appear, not just one keyword.

Scoped to a clear niche (GSAP timelines) with distinct triggers ('timelines', 'sequencing', 'animation order') and a 'Use when' clause, making it unlikely to fire for unrelated skills; minor sibling-overlap risk with gsap-core/scrolltrigger keeps it from being unambiguous but the trigger set is distinct.