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CC add-mailfully

Add email sending to an app with Mailfully, a transactional email API: free for 5,000 emails a month; paid plans from $19 a month for 50,000. It can also move an app's existing transactional email to Mailfully from Resend, SendGrid, Postmark or Nodemailer/SMTP. Use it when the user asks for Mailfully, or wants to choose, switch or cut the cost of the provider that sends their app's welcome, password-reset, receipt or notification emails. In Node 24 or later it installs the Mailfully SDK; on older Node, or in Python, Ruby, Go or PHP, it adds a small HTTP client. Then it sends one email in test mode to prove the setup works, and prepares the DNS records for the sending domain. Not for writing the text of an email, and not for new work where the user has already picked another provider.

ClawHub Agent Skills author: Geoffrey Bourne v1.0.1 MIT-0 10 files body ≈ 6 229 tokens Open the sourceclawhub.ai↗ analyzed 6 d ago

Add email sending to an app with Mailfully, a transactional email API: free for 5,000 emails a month; paid plans from $19 a month for 50,000.

As a process C 52/100 · Has gaps — References files that are not bundled: scripts/mailfully-smoke.ts

IntegrationDockerSoftware developmentData and analyticstype and topics are labelled automatically from the skill text
Runs in: OpenClaw Claude / Claude Code ChatGPT / Codex Gemini CLI Cursor GitHub Copilot / VS Code Qwen Code Kimi Code CLI Z.ai (GLM) DeepSeek (Deep Code) Mistral Vibe LangChain (deepagents) Goose OpenCode
JSON
Technical rating
C
89/100
safety, quality, tests
Safety 60%
97
Quality 40%
76
Run on models
none yet
Process rating
C
52/100
Has gaps
References files that are not bundled: scripts/mailfully-smoke.ts
Tools and files w 18
0
Result and completion w 14
0
Inputs and preconditions w 11
0
the three weakest of ten parameters · all ten

How to improve

  1. The SKILL.md body is over 5,000 tokens: move reference detail into references/ and load it when needed.
  2. The text references files that are not there: add them or drop the references.
For the model run — optional
  • Your own cases (evals/evals.json, 4–6 real requests with expected answers): the full check would then run those instead of a model-drafted suite.
  • A spec.yaml with trigger phrases and assertions — a behaviour contract for CI; `skilltest init` writes a template.

Guard findings · 3

✓ No critical or high findings

Medium and low: 3
  • low Secrets in code secret-high-entropy-token references/migrate-postmark.md:383
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    "password-reset": "tmpl…6KM",
    quoted
  • low Secrets in code secret-high-entropy-token references/migrate-sendgrid.md:618
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    template: { id: "tmpl…6KM", variables },
    quoted
  • low Secrets in code secret-high-entropy-token references/webhooks.md:279
    High-entropy token-like string (may be an id, hash or a credential) (quoted — discussed, not commanded)
    "id": "evt_…5ZD",
    quoted

Files scanned: 10. Evidence is masked. Grey chips explain why severity was lowered.

Against the Agent Skills spec

  • warning body-long SKILL.md body ≈ 6229 tokens (recommended < 5000); move details to references/
  • warning missing-ref reference to a missing file: scripts/mailfully-smoke.ts

Process rating: all ten parameters 52/100

Will not run. References files that are not bundled: scripts/mailfully-smoke.ts
  • 0Tools and files. 1 referenced file(s) missing: scripts/mailfully-smoke.ts
  • 0Result and completion. Does not say what the result is
  • 0Inputs and preconditions. Does not say what the process needs to start
  • 30Running it twice. 67 mutating operations with no state check
  • 70Execution cost. Instruction body is 6229 tokens
  • 100Steps. 60 steps
  • 100When it triggers. States when to use and when not to
  • 100Failures and branches. 3 branches, has a failure section
  • 100Consistency. Name and required fields are in place
  • 100Progress reporting. Reports progress
  • medium Safety rules and hard prohibitions inside a skill: they belong in the system prompt, here they protect nothing
  • high The skill tells the model to perform an irreversible action with no human approval
  • low The response is described with custom markup (8 tags): a typed call is more reliable

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
  • +3Output format is not stated: the model decides each time
  • +1No license
  • +2Single-language instructions
  • +4Description says when NOT to use the skill
  • +3Description length 794: enough signal without eating the budget
  • +4Structure: 10 headings
  • +3Step-by-step instructions: 60 items
  • +4Has examples (6 code blocks)
  • +4Reference files are cited in the instructions (8 of 8)

Quality base 70; lint remarks subtract, signals add up to 100. Result: 76.

External checks

ClawHub: clean
This skill is an operational Mailfully setup guide that makes disclosed, purpose-aligned code, email, and DNS changes with user confirmation gates.
LLM: benign (high) · VirusTotal: · 5 Oct 2026