Cold Outbound Optimizer
ericosiu/ai-marketing-skills
Design, analyze, and optimize cold outbound email campaigns for Instantly.
Write B2B cold emails and follow-up sequences that get replies.
Install Cold Email
$ npx skills add freekmurze/dotfiles --skill cold-email -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install freekmurze/dotfiles cold-email --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/freekmurze/dotfiles.git skills-src && mkdir -p .claude/skills && cp -r skills-src/config/claude/skills/marketing/skills/cold-email .claude/skills/cold-email && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "cold-email" agent skill from https://github.com/freekmurze/dotfiles/tree/main/config/claude/skills/marketing/skills/cold-email into .claude/skills/cold-email/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cold-email", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/freekmurze/dotfiles/tree/main/config/claude/skills/marketing/skills/cold-emailType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add freekmurze/dotfiles --skill cold-email -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install freekmurze/dotfiles cold-email --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/freekmurze/dotfiles.git skills-src && mkdir -p .agents/skills && cp -r skills-src/config/claude/skills/marketing/skills/cold-email .agents/skills/cold-email && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "cold-email" agent skill from https://github.com/freekmurze/dotfiles/tree/main/config/claude/skills/marketing/skills/cold-email into .agents/skills/cold-email/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cold-email", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add freekmurze/dotfiles --skill cold-email -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install freekmurze/dotfiles cold-email --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/freekmurze/dotfiles.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/config/claude/skills/marketing/skills/cold-email .cursor/skills/cold-email && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "cold-email" agent skill from https://github.com/freekmurze/dotfiles/tree/main/config/claude/skills/marketing/skills/cold-email into .cursor/skills/cold-email/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cold-email", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/freekmurze/dotfiles.git --path config/claude/skills/marketing/skills/cold-email--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add freekmurze/dotfiles --skill cold-email -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install freekmurze/dotfiles cold-email --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/freekmurze/dotfiles.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/config/claude/skills/marketing/skills/cold-email .gemini/skills/cold-email && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "cold-email" agent skill from https://github.com/freekmurze/dotfiles/tree/main/config/claude/skills/marketing/skills/cold-email into .gemini/skills/cold-email/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cold-email", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install freekmurze/dotfiles cold-emailInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add freekmurze/dotfiles --skill cold-email -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/freekmurze/dotfiles.git skills-src && mkdir -p .github/skills && cp -r skills-src/config/claude/skills/marketing/skills/cold-email .github/skills/cold-email && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "cold-email" agent skill from https://github.com/freekmurze/dotfiles/tree/main/config/claude/skills/marketing/skills/cold-email into .github/skills/cold-email/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cold-email", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add freekmurze/dotfiles --skill cold-email -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install freekmurze/dotfiles cold-email --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/freekmurze/dotfiles.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/config/claude/skills/marketing/skills/cold-email .opencode/skills/cold-email && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "cold-email" agent skill from https://github.com/freekmurze/dotfiles/tree/main/config/claude/skills/marketing/skills/cold-email into .opencode/skills/cold-email/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cold-email", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
cold-email- GitHub stars
- 1k
- Used in
- 2 other repos
- Token cost
- ~1.6k tokens
- SKILL.md length
- 861 words
- Files
- 6 (incl. references)
- Skills in repo
- 52
- Repo updated
- First seen
- Licence
- None found
At a glance
Write B2B cold emails and follow-up sequences that get replies.
- Works in 5 steps: Who are you writing to? — Role, company,… → What do you want? — The outcome… → What's the value? — The specific problem… → …
- The user wants to write cold outreach emails
- SKILL.md covers Before Writing, Writing Principles, Voice & Tone and Structure, plus 6 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Cold Email is an agent skill from freekmurze/dotfiles. Write B2B cold emails and follow-up sequences that get replies. Use when the user wants to write cold outreach emails, prospecting emails, cold email campaigns, sales development emails, or SDR emails. Covers subject lines, opening lines, body copy, CTAs, personalization, and multi-touch follow-up sequences.
Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files, including reference files (for example `references/benchmarks.md`, `references/follow-up-sequences.md` and `references/frameworks.md`).
It sits in Sales & Support, covering Cold outreach.
When your agent uses it
- The user wants to write cold outreach emails
- Prospecting emails
- Cold email campaigns
- Sales development emails
Example prompts
- “/cold-email”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Who are you writing to? — Role, company, why them specifically
- What do you want? — The outcome (meeting, reply, intro, demo)
- What's the value? — The specific problem you solve for people like them
- What's your proof? — A result, case study, or credibility signal
- Any research signals? — Funding, hiring, LinkedIn posts, company news, tech stack changes
What it can do on your machine
Read from SKILL.md and the folder at commit 8874280. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Cold Email loads about 1.6k tokens when it runs, and up to ~7.3k if it reads all its reference files. Until then it costs about 80 tokens; SKILL.md has 861 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 861 words (~1,646 tokens).
“You are an expert cold email writer. Your goal is to write emails that sound like they came from a sharp, thoughtful human — not a sales machine following a template.”
- name
- cold-email
Files
SKILL.md and 5 other files (references) in config/claude/skills/marketing/skills/cold-email of freekmurze/dotfiles.
- SKILL.md
- references/benchmarks.md
- references/follow-up-sequences.md
- references/frameworks.md
- references/personalization.md
- references/subject-lines.md
Open the folder on GitHubat commit 8874280
Used in 2 other repositories
We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in freekmurze/dotfiles, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Cold Email next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Cold Email this skillfreekmurze/dotfiles | 1k | 2 repos | ~1.6k | Automated safety check: Pass | None | |
| Cold Outbound Optimizerericosiu/ai-marketing-skills | 3.6k | 1 repos | ~1.7k | Automated safety check: Pass | MIT | |
| Prospectingcoreyhaines31/marketingskills | 54k | — | ~5k | Automated safety check: Pass | MIT | |
| Sales OsromangojiberryAI/gojiberryai-sales-os | 139 | — | ~2k | Automated safety check: Pass | MIT | |
| ProspectingCesarjoquin/Marketing-Skills | 201 | 1 repos | ~3.8k | Automated safety check: Pass | MIT | |
| Cold Outreach Personalizeraiskilloftheweek/claude-ai-skill-of-the-week | 148 | — | ~2.6k | Automated safety check: Pass | None |
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Related
Categories
Questions about Cold Email
What does Cold Email do?
Write B2B cold emails and follow-up sequences that get replies. Cold Email is an agent skill from freekmurze/dotfiles. Write B2B cold emails and follow-up sequences that get replies.
When should I use Cold Email?
Cold Email fits situations like: the user wants to write cold outreach emails; prospecting emails; cold email campaigns; sales development emails.
How do I install Cold Email in Claude Code?
Run `npx skills add freekmurze/dotfiles --skill cold-email -a claude-code`. Or copy the skill folder (config/claude/skills/marketing/skills/cold-email in freekmurze/dotfiles) into .claude/skills/cold-email in your project. Claude Code loads it when a task matches its description.
How do I install Cold Email in Codex?
Run `npx skills add freekmurze/dotfiles --skill cold-email -a codex`. Or copy the skill folder (config/claude/skills/marketing/skills/cold-email in freekmurze/dotfiles) into .agents/skills/cold-email in your project. Codex loads it when a task matches its description.
Can I use Cold Email in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add freekmurze/dotfiles --skill cold-email -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cold-email, .gemini/skills/cold-email, .github/skills/cold-email and .opencode/skills/cold-email in your project.
What does Cold Email need to run?
SKILL.md names no scripts, command-line tools or credentials: Cold Email is instructions for the agent only.
Does Cold Email access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Cold Email safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Cold Email use?
No licence was found for Cold Email or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Cold Email use?
About 1.6k tokens (SKILL.md is roughly 6.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 5.6k tokens, read only when the agent opens those files.
What are the alternatives to Cold Email?
Skills that share tags, products or a category with Cold Email: Cold Outbound Optimizer (ericosiu/ai-marketing-skills, 3.6k stars), Prospecting (coreyhaines31/marketingskills, 54k stars), Sales Os (romangojiberryAI/gojiberryai-sales-os, 139 stars) and Prospecting (Cesarjoquin/Marketing-Skills, 201 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Cold Email?
freekmurze (a GitHub user) maintains it in freekmurze/dotfiles, which has 1,013 GitHub stars. The repository holds 52 skills in this directory. The repository was last updated on October 8, 2026.
Source: freekmurze/dotfiles on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.