Design vs Testing · both proven

slides vs systematic-debugging

Both skills were run through Claude twice: once on a fixed brief without the skill, once with it. The briefs differ because each is written for the job the skill claims to do, so compare each skill against its own baseline, then decide which difference matters for your work. They are in different categories, so this is a choice of job, not a head-to-head on the same job.

slides

Create strategic HTML presentations with Chart.js, design tokens, responsive layouts, copywriting formulas, and contextual slide strategies.

Category: Design
Source: nextlevelbuilder/ui-ux-pro-max-skill
License: MIT
Proof model: claude-opus-5-5
Brief: “Make an 8-slide HTML presentation for a seed pitch: Tallyroom, software that lets independent gyms take class bookings and payments in one place. Revenue $18,000 a month, growing 14% month over month, 140 gyms, raising $1.5M. Include the problem, product, traction with a chart, business model, market, team of three, and the ask.”
Skill commit: bf41cbc

Without the skillWith slides

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Without, runWith slides, run3 independent runs per side, none selected by hand.

Download the with-skill page

systematic-debugging

Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes

Category: Testing
Source: obra/superpowers
License: MIT
Proof model: claude-opus-5-5
Brief: “A Node.js API returns 500 for about 1 in 200 requests to POST /orders. Logs show 'TypeError: Cannot read properties of undefined (reading "id")' at orders.js:48, which reads req.user.id. The route is behind an auth middleware. The failures started after a deploy that added a 30-second cache on the session lookup. Present your diagnosis and fix as a single HTML page: what you checked, in order, the root cause, the code change, and how you would confirm it is fixed.”
Skill commit: bb92a77

Without the skillWith systematic-debugging

⇆

Without, runWith systematic-debugging, run3 independent runs per side, none selected by hand.

Download the with-skill page

We don’t pick a winner for you: the pages are the evidence. Both proofs can be repeated with the brief, model and commit shown above. See alternatives to slides or alternatives to systematic-debugging.