Lenny Skills is a collection of product-management and engineering workflows for Claude Code and other AI agents, covering areas such as strategy, research, planning, shipping, growth, and hiring. Each skill gives an agent specialized guidance, frameworks, checklists, or templates for product work, and the catalogue contains many of these skills.
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 RefoundAI/lenny-skills --skill written-communicationgit clone --depth 1 https://github.com/RefoundAI/lenny-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/refoundai/lenny-skills/written-communication)<a href="https://agentmods.dev/skills/refoundai/lenny-skills/written-communication"><img src="https://agentmods.dev/badge/skills/refoundai/lenny-skills/written-communication/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/refoundai/lenny-skills/written-communication"><img src="https://agentmods.dev/badge/skills/refoundai/lenny-skills/written-communication.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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 | $0.00032 | $0.01250 |
| Opus 5 | $0.00016 | $0.00625 |
| Sonnet 5 | $0.00006 | $0.00250 |
| Haiku 4.5 | $0.00003 | $0.00125 |
Grade A, and why
written-communication 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 7d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- stm32-code-review — 86% identical, 152 lines differ
How it starts
The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Written Communication for Leaders
Scale your influence and drive alignment through structured, clear, and persuasive writing.
Help the user with written communication for leaders using insights from 12 guests and posts across Lenny's Podcast and Newsletter.
How to Help
- Framework application - Guide the user in applying the SCR or Minto Pyramid frameworks to their current draft.
- Narrative sharpening - Help the user identify and lead with their primary conclusion to ensure executive clarity.
- Tone and conciseness - Review drafts to remove fluff, strengthen logic, and adapt the tone for the intended audience.
- Process design - Assist in establishing async communication norms or structured feedback loops for the team.
Core Principles
Write for Personal Mastery
Julian Shapiro: "They're forcing functions for me to hold myself accountable and to be thorough when learning something for my own benefit. That's all they are. Basically if I want to go learn growth or writing well or some other topic, I will go ahead and do a ton of research, read everything I can get my hands on, do a ton of experimentation to try to build a set of novel insights that you couldn't find from other people's research hopefully, and then the next stage is try to make it as concise and actionable as possible so that I can reference it for my own selfish benefit."
Use writing as a selfish tool for your own learning to ensure the resulting work is thorough and high quality.
Scale Influence via Documentation
Kevin Yien: "writing is clarity at scale, and a key component to a PM's job is creating clarity both i"
Effective writing is a primary tool for maintaining clarity and alignment across an entire organization simultaneously.
Standardize Narrative Frameworks
From "The Minto Pyramid Principle and the SCR Framework": "If you simplify this further, there are three parts to every narrative: Situation, Complication, Resolution. 1. Situation: What is the state of affairs today. Facts, data, and unambiguous background. 2. Complication: What has changed that requires action. What is the problem? 3. Resolution: What we need to do to resolve this complication."
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 7d ago First seen · 80 lines · 32 tokens per session scan A aa3e614bfc17
written-communication is a skill published in the GitHub repository RefoundAI/lenny-skills (1,318 stars, last pushed 1mo ago), licensed MIT. It adds 32 tokens to every session and 1,250 once invoked, about $0.0002 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 2026-09-03.
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Notion API for creating and managing pages, databases, and blocks via curl. Search, create, update, and query Notion workspaces directly from the terminal.
github-issues
Create, manage, triage, and close GitHub issues. Search existing issues, add labels, assign people, and link to PRs. Works with gh CLI or falls back to git + GitHub REST API via curl.
trello
Manage Trello boards, lists, and cards via the Trello REST API.
things-mac
Manage Things 3 via the things CLI on macOS (add/update projects+todos via URL scheme; read/search/list from the local Things database). Use when a user asks OpenClaw to add a task to Things, list inbox/today/upcoming, search tasks, or inspect projects/areas/tags.
wayfinder
Plan a huge chunk of work — more than one agent session can hold — as a shared map of decision tickets on your issue tracker, and resolve them one at a time until the way to the destination is clear.