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Get Started Free →Design and build interactive playgrounds that let developers experience your product without commitment. This skill covers playground architecture, pre-populated examples, embedding strategies, gating decisions, and converting playground users to signups. Trigger phrases: "developer...
.claude/skills/sickn33-developer-sandbox/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-06 | ✗→✓ | ▲ Improved | 106% | 0% |
| case-10 | ✗→✓ | ▲ Improved | 156% | 0% |
| case-03 | ✓→✓ | = Same ✓ | 83% | 0% |
| case-04 | ✓→✓ | = Same ✓ | 82% | 0% |
| case-05 | ✓→✓ | = Same ✓ | 108% | 0% |
Read the detailed guide before executing this skill. It retains the complete procedure and reference material. Treat its safety, prerequisites, and validation requirements as mandatory. For focused work, load the relevant sections; for end-to-end work, read the guide completely.
Use this skill when you need design and build interactive playgrounds that let developers experience your product without commitment. This skill covers playground architecture, pre-populated examples, embedding strategies, gating decisions, and converting playground users to signups. Trigger phrases: "developer...
Let developers experience your product before they commit. A great playground removes the biggest barrier to adoption: uncertainty about whether your product solves their problem.
Choose examples that:
"Hello World" Example
javascript// Example: Text Analysis API const result = await api.analyze("Hello, world!"); // Output: { words: 2, characters: 13 }
"Aha Moment" Example
javascript// Example: Shows AI doing something impressive const result = await api.summarize(longArticle); // Output: A perfect 3-sentence summary
"Real Use Case" Examples
javascript// Example 1: E-commerce - Analyze product reviews // Example 2: Support - Classify incoming tickets // Example 3: Social - Detect spam comments
"Integration" Examples
javascript// Example: Integration with Express.js app.post('/analyze', async (req, res) => { const result = await api.analyze(req.body.text); res.json(result); });
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-01 | fail→fail | 32,863 | 24,646 | -25% | 1 | 1 | 0% | 6,211 | 7,417 | +19% | 0 | 0 | — |
case-02 | fail→fail | 30,419 | 29,447 | -3% | 1 | 1 | 0% | 5,271 | 9,082 | +72% | 0 | 0 | — |
case-03 | pass→pass | 26,756 | 28,482 | +6% | 1 | 1 | 0% | 4,565 | 8,335 | +83% | 0 | 0 | — |
case-04 | pass→pass | 17,559 | 18,729 | +7% | 1 | 1 | 0% | 4,265 | 7,760 | +82% | 0 | 0 | — |
case-05 | pass→pass | 14,127 | 12,614 | -11% | 1 | 1 | 0% | 2,820 | 5,872 | +108% | 0 | 0 | — |
case-06 | fail→pass | 15,962 | 13,465 | -16% | 1 | 1 | 0% | 2,619 | 5,394 | +106% | 0 | 0 | — |
case-07 | fail→fail | 13,639 | 15,154 | +11% | 1 | 1 | 0% | 2,159 | 5,636 | +161% | 0 | 0 | — |
case-08 | pass→pass | 12,982 | 12,979 | -0% | 1 | 1 | 0% | 2,134 | 5,302 | +148% | 0 | 0 | — |
case-09 | pass→pass | 19,102 | 14,254 | -25% | 1 | 1 | 0% | 2,770 | 5,643 | +104% | 0 | 0 | — |
case-10 | fail→pass | 15,118 | 16,804 | +11% | 1 | 1 | 0% | 2,282 | 5,853 | +156% | 0 | 0 | — |
case-11 | pass→pass | 22,329 | 18,888 | -15% | 1 | 1 | 0% | 3,214 | 6,133 | +91% | 0 | 0 | — |
case-12 | pass→pass | 17,662 | 17,654 | -0% | 1 | 1 | 0% | 2,743 | 5,285 | +93% | 0 | 0 | — |
case-13 | pass→pass | 17,109 | 18,126 | +6% | 1 | 1 | 0% | 2,560 | 5,896 | +130% | 0 | 0 | — |
case-14 | pass→pass | 15,857 | 19,383 | +22% | 1 | 1 | 0% | 2,490 | 6,102 | +145% | 0 | 0 | — |
case-15 | pass→pass | 13,562 | 12,066 | -11% | 1 | 1 | 0% | 2,032 | 5,033 | +148% | 0 | 0 | — |
case-16 | pass→pass | 15,902 | 17,990 | +13% | 1 | 1 | 0% | 2,231 | 5,904 | +165% | 0 | 0 | — |
case-17 | pass→pass | 18,586 | 21,021 | +13% | 1 | 1 | 0% | 3,025 | 6,653 | +120% | 0 | 0 | — |
case-18 | pass→pass | 15,949 | 9,113 | -43% | 1 | 1 | 0% | 2,267 | 4,613 | +103% | 0 | 0 | — |
case-19 | pass→pass | 48,049 | 16,242 | -66% | 1 | 1 | 0% | 2,589 | 5,627 | +117% | 0 | 0 | — |
case-20 | pass→pass | 16,548 | 15,655 | -5% | 1 | 1 | 0% | 2,606 | 5,467 | +110% | 0 | 0 | — |
case-21 | fail→fail | 16,397 | 18,399 | +12% | 1 | 1 | 0% | 2,839 | 6,656 | +134% | 0 | 0 | — |
case-22 | pass→pass | 15,225 | 6,917 | -55% | 1 | 1 | 0% | 2,211 | 4,248 | +92% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 22 cases were attempted. The headline lift of 0 percentage points is the difference between those two pass rates over the 22 comparable cases. 2 cases got worse with the skill loaded, and they are included in that figure.
The publisher has shipped newer versions since this run, so these numbers describe v1, not the version currently listed.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.