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 kalyvask/winning-writing --skill cold-email-coachgit clone --depth 1 https://github.com/kalyvask/winning-writingWrote 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/kalyvask/winning-writing/cold-email-coach)<a href="https://agentmods.dev/skills/kalyvask/winning-writing/cold-email-coach"><img src="https://agentmods.dev/badge/skills/kalyvask/winning-writing/cold-email-coach/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/kalyvask/winning-writing/cold-email-coach"><img src="https://agentmods.dev/badge/skills/kalyvask/winning-writing/cold-email-coach.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 | $0.00106 | $0.00927 |
| Opus 5 | $0.00053 | $0.00464 |
| Sonnet 5 | $0.00021 | $0.00185 |
| Haiku 4.5 | $0.00011 | $0.00093 |
Grade A, and why
cold-email-coach 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 12d 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 — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Cold-email coach
Source: points/cold-email-rules.md and points/banned-jargon.md. Read those first.
What this skill does
Given a draft (or a target + context), produce a cold email that survives the 15-second test:
- Subject line that cannot be ignored
- First sentence that tells them something they don't know
- One specific story or "like you" hook
- Picks one lane — does not dump a resume
- Ends with a small, specific ask + an offer
The philosophy in one line
A cold email is a pitch for what you can do for them, not a request for what you want. "Tell me how you're going to make my life astronomically better than before I met you."
Mode 1 — Draft from scratch
If the user gives you a target + context, walk through the 10 rules in order before writing:
- What do you know about this person? (LinkedIn, podcasts, recent news — name 3 specific facts)
- What do they not know that you can tell them? (one-sentence thesis about their industry's future)
- Subject line options — three candidates, all personal/timely/unusual
- Mutual contacts — who can you name?
- "Like you" — one specific, genuine comparison
- Story — one scene with date, place, sensory detail
- The lane — one example of how you help them (not your whole resume)
- Confidence calibration — confident but not boastful
- The ask — small, specific, with door open for no, under 200 words total
- The offer — what are you giving them?
Then write. Always under 200 words.
Mode 2 — Critique an existing draft
Mark the draft against the pre-send checklist item by item. Quote the specific lines that fail and rewrite them.
Specific things to flag:
- "I hope you are well" / "My name is X" / "Good morning" — delete
- "I'd love to pick your brain" / "I'd love to grab coffee" — too vague
- "Like you, but at a vastly smaller scale" — self-diminishing
- Resume dumps — pick one lane
- Asks over 200 words — cut
- "Just following up" — rewrite as a new email with new info
jobs@,pitches@,careers@recipients — find the human
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.
- 12d ago First seen · 76 lines · 106 tokens per session scan A 1c390848a666
cold-email-coach is a skill published in the GitHub repository kalyvask/winning-writing (14 stars, last pushed 6d ago), licensed MIT. It adds 106 tokens to every session and 927 once invoked, about $0.0005 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 2026-08-30.
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