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Get Started Free →Read this when you need to use Chrome extension APIs: managing bookmarks, tabs, windows, tab groups, history, downloads, or top sites.
.claude/skills/kunanonj-chrome/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-01 | ✗→✓ | ▲ Improved | -47% | 0% |
| case-06 | ✗→✓ | ▲ Improved | -41% | 0% |
| case-14 | ✗→✓ | ▲ Improved | -69% | 0% |
| case-22 | ✗→✓ | ▲ Improved | -70% | 0% |
| case-23 | ✗→✓ | ▲ Improved | -22% | 0% |
Use the chrome global in the REPL. It exposes whitelisted Chrome MV3 methods with the same method names and positional arguments as extension code.
jsconst tabs = await chrome.tabs.query({}); const bookmark = await chrome.bookmarks.create({ title: 'Aside', url: 'https://aside.com' });
Only methods listed in this skill are callable. Use Asidewright (page, locator, snapshot, openTab) for page interaction; use chrome.* for browser-profile state such as bookmarks, tabs, windows, history, downloads, and top sites.
./bookmarks.md./tabs.md./windows.md./tab-groups.md./history.md./downloads.md./top-sites.md| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-09 | pass→fail | 7,125 | 3,104 | -56% | 1 | 1 | 0% | 1,447 | 351 | -76% | 0 | 0 | — |
case-01 | fail→pass | 9,535 | 3,537 | -63% | 1 | 1 | 0% | 1,839 | 977 | -47% | 0 | 0 | — |
case-02 | pass→pass | 6,800 | 1,348 | -80% | 1 | 1 | 0% | 1,476 | 475 | -68% | 0 | 0 | — |
case-03 | pass→fail | 8,584 | 4,840 | -44% | 1 | 1 | 0% | 1,771 | 421 | -76% | 0 | 0 | — |
case-04 | fail→fail | 7,653 | 3,974 | -48% | 1 | 1 | 0% | 1,620 | 391 | -76% | 0 | 0 | — |
case-05 | pass→fail | 5,087 | 3,466 | -32% | 1 | 1 | 0% | 1,127 | 374 | -67% | 0 | 0 | — |
case-06 | fail→pass | 5,814 | 4,283 | -26% | 1 | 1 | 0% | 1,145 | 674 | -41% | 0 | 0 | — |
case-07 | pass→pass | 8,049 | 4,548 | -43% | 1 | 1 | 0% | 1,748 | 613 | -65% | 0 | 0 | — |
case-08 | pass→pass | 6,246 | 5,863 | -6% | 1 | 1 | 0% | 1,178 | 1,017 | -14% | 0 | 0 | — |
case-10 | pass→pass | 10,319 | 5,490 | -47% | 1 | 1 | 0% | 2,250 | 638 | -72% | 0 | 0 | — |
case-11 | fail→fail | 11,118 | 2,506 | -77% | 1 | 1 | 0% | 2,202 | 717 | -67% | 0 | 0 | — |
case-12 | fail→fail | 9,201 | 5,304 | -42% | 1 | 1 | 0% | 2,064 | 462 | -78% | 0 | 0 | — |
case-13 | pass→fail | 10,167 | 3,667 | -64% | 1 | 1 | 0% | 2,017 | 365 | -82% | 0 | 0 | — |
case-14 | fail→pass | 7,513 | 2,057 | -73% | 1 | 1 | 0% | 1,620 | 507 | -69% | 0 | 0 | — |
case-15 | pass→fail | 11,988 | 3,228 | -73% | 1 | 1 | 0% | 2,608 | 349 | -87% | 0 | 0 | — |
case-16 | fail→fail | 14,423 | 3,501 | -76% | 1 | 1 | 0% | 3,330 | 313 | -91% | 0 | 0 | — |
case-17 | fail→fail | 10,252 | 3,072 | -70% | 1 | 1 | 0% | 2,518 | 330 | -87% | 0 | 0 | — |
case-18 | pass→pass | 5,442 | 5,554 | +2% | 1 | 1 | 0% | 1,241 | 1,455 | +17% | 0 | 0 | — |
case-19 | pass→fail | 11,845 | 2,368 | -80% | 1 | 1 | 0% | 2,577 | 431 | -83% | 0 | 0 | — |
case-20 | pass→fail | 9,460 | 3,134 | -67% | 1 | 1 | 0% | 2,119 | 318 | -85% | 0 | 0 | — |
case-21 | fail→fail | 6,288 | 2,361 | -62% | 1 | 1 | 0% | 1,274 | 691 | -46% | 0 | 0 | — |
case-22 | fail→pass | 11,594 | 2,417 | -79% | 1 | 1 | 0% | 1,979 | 601 | -70% | 0 | 0 | — |
case-23 | fail→pass | 6,207 | 3,491 | -44% | 1 | 1 | 0% | 1,263 | 988 | -22% | 0 | 0 | — |
case-24 | fail→pass | 2,561 | 3,185 | +24% | 1 | 1 | 0% | 508 | 826 | +63% | 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. 24 cases were attempted, and 13 counted toward the lift figure. The other 11 produced results that are not comparable between the two arms, so they are excluded from the headline rather than averaged into it. The headline lift of -4 percentage points is the difference between those two pass rates over the 13 comparable cases. 7 cases got worse with the skill loaded, and they are included in that figure.
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.