AC resend-cli
Use this skill when the task is specifically about operating Resend from an AI agent, terminal session, or CI job via the official resend CLI: installing/authenticating the CLI, sending/listing/updating/cancelling emails, batch sends, domains and DNS, webhooks and local listeners, inbound receiving, contacts, topics, segments, broadcasts, templates, API keys, profiles, or debugging Resend CLI/API failures. Trigger on mentions of Resend CLI, `resend`, `resend doctor`, `resend emails send`, `resend domains`, `resend webhooks listen`, `resend emails receiving`, or agent-friendly terminal automation.
As a process C 58/100 · Has gaps — weak spots: inputs and preconditions, consistency, running it twice
What is at stake
Medium-severity findings: the skill is probably honest, but read what alarmed the scanner.
Below is the worst case for this category. The finding here is medium: the guard saw a sign, not a proof.
The skill contains commands that delete files, rewrite disks or execute code fetched from the network. The agent may run them without asking if it believes the instructions require it.
Replace destructive commands with safe equivalents that ask for confirmation, scope them to one folder, and stop piping curl into a shell: pin a version and a checksum.
How to improve
- A spec.yaml with trigger phrases and assertions — a behaviour contract for CI; `skilltest init` writes a template.
Guard findings · 6
✓ No critical or high findings
Medium and low: 6
-
medium Dangerous commands
cmd-pipe-to-shellassets/github-actions-resend.yml:13Downloads and executes remote code from an unrecognised host (pipe to shell) (the skill's own vendor host)run: curl -fsSL https://resend.com/install.sh | bash
vendor-host -
low Exfiltration
exfil-webhook-urlassets/scaffold-index.json:23Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)"command": "resend --json webhooks listen --url https://example.ngrok-free.app --forward-to loca…000/webhooks/resend",
placeholder -
low Exfiltration
exfil-webhook-urlassets/task-router.json:149Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)"resend --json webhooks listen --url https://example.ngrok-free.app --forward-to loca…000/webhooks/resend"
placeholder -
low Dangerous commands
cmd-pipe-to-shellreferences/install-auth-and-profiles.md:12Downloads and executes remote code from an unrecognised host (pipe to shell) (documentation table row; the skill's own vendor host)| Generic macOS/Linux shell | `curl -fsSL https://resend.com/install.sh \| bash` |
tablevendor-host -
low Exfiltration
exfil-webhook-urlreferences/webhooks-and-listeners.md:59Webhook / callback URL commonly used for exfiltration (verify the destination) (placeholder value)--url https://example.ngrok-free.app \
placeholder -
low Dangerous commands
cmd-pipe-to-shellscripts/resend_cli.py:76Downloads and executes remote code from an unrecognised host (pipe to shell) (string literal in code, not executed; the skill's own vendor host){"method": "curl", "command": "curl -fsSL https://resend.com/install.sh | bash"},code literalvendor-host
Files scanned: 29. Evidence is masked. Grey chips explain why severity was lowered.
Against the Agent Skills spec
✓ No remarks against the Agent Skills spec
Process rating: all ten parameters 58/100
- 0Inputs and preconditions. Does not say what the process needs to start
- 0Progress reporting. Says nothing while it works
- 30Running it twice. 16 mutating operations with no state check
- 40Consistency. Frontmatter name (resend-cli) differs from the folder (resending-emails)
- 50Failures and branches. 0 branches, has a failure section
- 60Tools and files. Uses tools (bash) that frontmatter does not declare
- 60Result and completion. Output format stated, no completion criterion
- 70When it triggers. States when to use, but not when not to
- 100Steps. 90 steps
- 100Execution cost. Instruction body is 1946 tokens
- medium 18 test cases, all positive: not one "should refuse" or "should ask first"
- low No test case covers injection arriving through data
Everything here is measured from the skill text rather than judged by a model, so the numbers are checkable. A parameter weighs more when it is a more common reason for the process to stall.
Quality signals
- +5Description has no quoted example phrases that should trigger the skill
- +4Description does not say when NOT to use the skill (false activations)
- +1No license
- +2Single-language instructions
- +3Description length 603: enough signal without eating the budget
- +4Structure: 13 headings
- +3Step-by-step instructions: 90 items
- +3Output format is stated explicitly
- +4Has examples (2 code blocks)
- +4Reference files are cited in the instructions (13 of 13)
- +3All 1 scripts are documented
Quality base 70; lint remarks subtract, signals add up to 100. Result: 94.