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Get Started Free →Send emails, manage domains, API keys, contacts, and broadcasts. Use when an agent needs to send transactional or marketing emails, manage email contacts, or configure email domains.
.claude/skills/composio-community-resend-cli/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-01 | ✗→✓ | ▲ Improved | -34% | 0% |
| case-03 | ✗→✓ | ▲ Improved | -62% | 0% |
| case-04 | ✗→✓ | ▲ Improved | -64% | 0% |
| case-05 | ✗→✓ | ▲ Improved | -66% | 0% |
| case-06 | ✗→✓ | ▲ Improved | -70% | 0% |
Send emails, manage domains, API keys, contacts, and broadcasts. 53 commands across 13 resources.
bashnpm i -g resend resend login
bashresend emails send --from "you@example.com" --to "them@example.com" --subject "Hello" --text "Hi there" resend domains list resend contacts list --audience-id <id> resend api-keys list resend broadcasts list
resend doctor for agent environment detection| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-01 | fail→pass | 4,632 | 2,899 | -37% | 1 | 1 | 0% | 756 | 501 | -34% | 0 | 0 | — |
case-02 | pass→pass | 7,762 | 1,985 | -74% | 1 | 1 | 0% | 967 | 514 | -47% | 0 | 0 | — |
case-03 | fail→pass | 8,704 | 2,012 | -77% | 1 | 1 | 0% | 1,628 | 613 | -62% | 0 | 0 | — |
case-04 | fail→pass | 11,316 | 2,652 | -77% | 1 | 1 | 0% | 1,563 | 564 | -64% | 0 | 0 | — |
case-05 | fail→pass | 9,958 | 2,608 | -74% | 1 | 1 | 0% | 1,468 | 497 | -66% | 0 | 0 | — |
case-06 | fail→pass | 12,046 | 1,995 | -83% | 1 | 1 | 0% | 1,624 | 485 | -70% | 0 | 0 | — |
case-07 | pass→pass | 5,434 | 1,843 | -66% | 1 | 1 | 0% | 840 | 375 | -55% | 0 | 0 | — |
case-08 | pass→pass | 3,332 | 1,692 | -49% | 1 | 1 | 0% | 438 | 389 | -11% | 0 | 0 | — |
case-09 | fail→pass | 12,170 | 4,209 | -65% | 1 | 1 | 0% | 1,885 | 846 | -55% | 0 | 0 | — |
case-10 | pass→pass | 6,151 | 3,124 | -49% | 1 | 1 | 0% | 944 | 548 | -42% | 0 | 0 | — |
case-11 | pass→pass | 10,018 | 5,212 | -48% | 1 | 1 | 0% | 1,617 | 834 | -48% | 0 | 0 | — |
case-12 | fail→pass | 12,730 | 1,813 | -86% | 1 | 1 | 0% | 1,928 | 448 | -77% | 0 | 0 | — |
case-13 | pass→pass | 11,751 | 6,063 | -48% | 1 | 1 | 0% | 2,101 | 1,068 | -49% | 0 | 0 | — |
case-14 | pass→pass | 4,758 | 2,347 | -51% | 1 | 1 | 0% | 890 | 470 | -47% | 0 | 0 | — |
case-15 | pass→pass | 7,130 | 3,487 | -51% | 1 | 1 | 0% | 651 | 555 | -15% | 0 | 0 | — |
case-16 | fail→fail | 15,768 | 1,444 | -91% | 1 | 1 | 0% | 2,045 | 388 | -81% | 0 | 0 | — |
case-17 | pass→pass | 3,261 | 2,225 | -32% | 1 | 1 | 0% | 461 | 519 | +13% | 0 | 0 | — |
case-18 | fail→pass | 6,721 | 1,778 | -74% | 1 | 1 | 0% | 1,211 | 460 | -62% | 0 | 0 | — |
case-19 | pass→pass | 103,571 | 7,540 | -93% | 1 | 1 | 0% | 2,166 | 394 | -82% | 0 | 0 | — |
case-20 | pass→pass | 22,504 | 9,478 | -58% | 1 | 1 | 0% | 2,270 | 1,956 | -14% | 0 | 0 | — |
case-21 | pass→pass | 11,714 | 9,038 | -23% | 1 | 1 | 0% | 1,886 | 1,661 | -12% | 0 | 0 | — |
case-22 | pass→pass | 11,432 | 14,701 | +29% | 1 | 1 | 0% | 1,129 | 1,114 | -1% | 0 | 0 | — |
case-23 | pass→pass | 10,218 | 8,234 | -19% | 1 | 1 | 0% | 1,725 | 1,697 | -2% | 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. 23 cases were attempted. The headline lift of +35 percentage points is the difference between those two pass rates over the 23 comparable cases.
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.