The ~250-line body restates the feature-list-dump / hidden-recommendation / honest-comparison-with-guidance framing in the intro, its own section, and the closing, and includes rhetorical restatement ('The discipline is in the design choices...'); mostly efficient domain guidance but could be tightened. Not level-3 because the repetition and conceptual setup pad tokens that don't all earn their place; not level-1 because the bulk is specific domain guidance rather than concepts Claude already knows.

Gives concrete, specific directives: the 8-12 axis rule, literal recommendation phrasings ('For [audience], choose [option] because [reasons]'), named failure patterns with diagnoses, and a 12-consideration checklist — actionable instructional guidance per the code-vs-instruction note. Not level-2 because key details (axis counts, phrasing templates, decision criteria) are present rather than missing.

Provides a clearly sequenced 12-consideration checklist with an explicit up-front gating decision (when comparison tools earn investment vs. when they do not), the analog of validation checkpoints for a design/audit skill. Not level-2 because the sequence and gating checkpoint are explicit, not implicit; the destructive/batch validation cap does not apply to this design playbook.

Each major section ends with a clearly signaled one-level-deep 'Detail in references/...' link, and a Reference files section lists all 9 files with one-line descriptions; all referenced files exist on disk. Not level-2 because references are well-signaled and content is appropriately split between inline overview and reference files.

Lists multiple concrete capabilities (axis selection, default-comparison logic, recommendation discipline) plus three named patterns, matching the 'lists multiple specific concrete actions' anchor; not a level-2 'some actions' case because the actions are specific and enumerated.

Clearly answers both what ('Designing side-by-side comparison tools...') and when (explicit 'Triggers on...' and 'Also triggers when...' clauses), matching the both-what-and-when anchor; not level-2 because the when is explicit, not implied.

'Triggers on comparison tool, plan compare, product compare, alternative compare, vs page, decision support tool' gives good coverage of natural terms a user would say, plus behavioral triggers; not a level-2 because common variations are present rather than missing.

A clear niche (comparison tools) with distinct triggers unlikely to fire for sibling growth-tooling skills; not level-2 because the triggers are specific to comparison work rather than broadly overlapping.