Systems Lab

Agent skill

cold-email

Run the Markster OS cold email playbook.

slowingNeeds a keyInstructions only1,137 words

Filed under Outbound email.

From markster-public/markster-os · 29 skills · 61 · pushed 2026-05-15

What it does when it runs

Run the Markster OS cold email playbook. CHECK prerequisites, DO the sequence build, VERIFY before sending. Routes through ScaleOS G3 Book with context from F1/F2.

Read from the skill and the 0 files bundled beside it. A skill’s own description is written to be selected by an agent, so it describes the job and not the dependencies.

Keys and connectors you must supply
  • AOE_GRADER_KEY
  • LEAD_PACKS_KEY
Hosts it reaches
No third-party host appears in the skill or its bundled files.
Tool permissions it declares
No allowed-tools in the frontmatter. It only issues instructions, so there is nothing to bound.
Actions present in the files
None. Instructions only.

Ask about cold-email

Opens your assistant with this page's verified links already in the prompt.

Is this safe to install?ClaudeChatGPT
Adapt it to my stackClaudeChatGPT
What else do I need for it to workClaudeChatGPT
Rather ask a human? Talk to Cheetah

Install it

View source on GitHub ↗
git clone --depth 1 --filter=blob:none --sparse https://github.com/markster-public/markster-os.git /tmp/markster-os
git -C /tmp/markster-os sparse-checkout set "skills/cold-email"
mkdir -p ~/.claude/skills/cold-email
cp -R "/tmp/markster-os/skills/cold-email/." ~/.claude/skills/cold-email/

Picked up without a restart. A project skill of the same name is shadowed by your personal one. For one repository only, swap ~/.claude/skills for .claude/skills. Claude Code docs ↗

The folder is the same in every client that implements the format — 46 of them — so if yours is not above, only the destination changes.

Before you install: this skill will not complete its job on a bare agent. It needs AOE_GRADER_KEY, LEAD_PACKS_KEY, which you have to obtain separately.

The skill

Source on GitHub ↗

The source carries no licence at all, so no permission to redistribute it exists. Everything else on this page is our own reading of the file and is published here; the text of the skill is not, and stays where its author put it.

Other skills for the same job

Different authors, same problem. Matched on the words in the skill name, across every library in the catalogue except this one.

Need help setting it up?

This page tells you what cold-email does and what it needs. Cheetah builds the agent setup it runs inside: data, CRM, sequencing and the guardrails.

Book a call →

The directory stays free. There is nothing gated behind this.