Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add Bluecraft-AI/machfive-skills --skill cold-emailgit clone --depth 1 https://github.com/Bluecraft-AI/machfive-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/bluecraft-ai/machfive-skills/cold-email)<a href="https://agentmods.dev/skills/bluecraft-ai/machfive-skills/cold-email"><img src="https://agentmods.dev/badge/skills/bluecraft-ai/machfive-skills/cold-email/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/bluecraft-ai/machfive-skills/cold-email"><img src="https://agentmods.dev/badge/skills/bluecraft-ai/machfive-skills/cold-email.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00024 | $0.02589 |
| Opus 5 | $0.00012 | $0.01295 |
| Sonnet 5 | $0.00005 | $0.00518 |
| Haiku 4.5 | $0.00002 | $0.00259 |
Grade A, and why
cold-email scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 220 lines — stays where its author put it; the contents beside it link to each section on GitHub.
MachFive - AI Cold Email Generator
Generate personalized cold email sequences from lead data. MachFive uses AI to research prospects and craft unique, relevant outreach - not templates.
Setup
- Get your API key at https://app.machfive.io/settings (Integrations → API Keys)
- Set
MACHFIVE_API_KEYin your environment
Campaign ID
Every generate request needs a campaign ID in the URL: /api/v1/campaigns/{campaign_id}/generate (or /generate-batch).
- If the user has not provided a campaign name or ID: Call GET /api/v1/campaigns (see below) to list campaigns in their workspace, then ask them to pick one by name or ID before running generate.
- Where to get it manually: https://app.machfive.io/campaigns → open a campaign → copy the ID from the URL or settings.
- No default: The skill does not assume a campaign. The user (or agent config) must provide one. Agents can store a default campaign ID for the workspace if the user provides it (e.g. "use campaign X for my requests").
Endpoints
List Campaigns (discover before generate)
List campaigns in the workspace so the agent can ask the user which campaign to use when they haven't provided a name or ID.
GET https://app.machfive.io/api/v1/campaigns
Authorization: Bearer {MACHFIVE_API_KEY}
Or use X-API-Key: {MACHFIVE_API_KEY} header.
Optional query: ?q=search or ?name=search to filter by campaign name.
Response (200):
{
"campaigns": [
{ "id": "cb1bbb14-e576-4d8f-a8f3-6fa929076fd8", "name": "SaaS Q1 Outreach", "created_at": "2025-01-15T12:00:00Z" },
{ "id": "a1b2c3d4-...", "name": "Enterprise Leads", "created_at": "2025-01-10T08:00:00Z" }
]
}
If no campaign name or ID was given, call this first, then ask the user: "Which campaign should I use? [list names/IDs]."
Single Lead (Sync)
Generate an email sequence for one lead (3–5 emails per lead). Waits for completion, returns the sequence directly. The request can take 3–5 minutes (AI research + generation); use a client timeout of at least 300 seconds (5 min) or 600 seconds (10 min). Do not use a 120s timeout or the response will be cut off.
POST https://app.machfive.io/api/v1/campaigns/{campaign_id}/generate
Authorization: Bearer {MACHFIVE_API_KEY}
Content-Type: application/json
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 220 lines · 24 tokens per session scan A bcd71270f5e8
cold-email is a skill published in the GitHub repository Bluecraft-AI/machfive-skills (2 stars, last pushed 6mo ago), licensed MIT. It adds 24 tokens to every session and 2,589 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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