Sec S1 Analysis
OctagonAI/skills
Analyze S-1 registration statements for IPOs using Octagon MCP.
Answers product strategy, growth, pricing, hiring, and leadership questions using Lenny Rachitsky's archive.
Install What Would Lenny Do
$ npx skills add amplitude/builder-skills --skill what-would-lenny-do -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install amplitude/builder-skills what-would-lenny-do --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/amplitude/builder-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/product-skills/skills/what-would-lenny-do .claude/skills/what-would-lenny-do && 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 "what-would-lenny-do" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/what-would-lenny-do into .claude/skills/what-would-lenny-do/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "what-would-lenny-do", 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/amplitude/builder-skills/tree/main/product-skills/skills/what-would-lenny-doType 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 amplitude/builder-skills --skill what-would-lenny-do -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install amplitude/builder-skills what-would-lenny-do --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/product-skills/skills/what-would-lenny-do .agents/skills/what-would-lenny-do && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "what-would-lenny-do" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/what-would-lenny-do into .agents/skills/what-would-lenny-do/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "what-would-lenny-do", 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 amplitude/builder-skills --skill what-would-lenny-do -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install amplitude/builder-skills what-would-lenny-do --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/product-skills/skills/what-would-lenny-do .cursor/skills/what-would-lenny-do && 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 "what-would-lenny-do" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/what-would-lenny-do into .cursor/skills/what-would-lenny-do/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "what-would-lenny-do", 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/amplitude/builder-skills.git --path product-skills/skills/what-would-lenny-do--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 amplitude/builder-skills --skill what-would-lenny-do -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install amplitude/builder-skills what-would-lenny-do --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/product-skills/skills/what-would-lenny-do .gemini/skills/what-would-lenny-do && 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 "what-would-lenny-do" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/what-would-lenny-do into .gemini/skills/what-would-lenny-do/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "what-would-lenny-do", 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 amplitude/builder-skills what-would-lenny-doInstalls 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 amplitude/builder-skills --skill what-would-lenny-do -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/product-skills/skills/what-would-lenny-do .github/skills/what-would-lenny-do && 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 "what-would-lenny-do" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/what-would-lenny-do into .github/skills/what-would-lenny-do/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "what-would-lenny-do", 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 amplitude/builder-skills --skill what-would-lenny-do -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install amplitude/builder-skills what-would-lenny-do --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/product-skills/skills/what-would-lenny-do .opencode/skills/what-would-lenny-do && 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 "what-would-lenny-do" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/what-would-lenny-do into .opencode/skills/what-would-lenny-do/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "what-would-lenny-do", 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
what-would-lenny-do- GitHub stars
- 159
- Token cost
- ~2.6k tokens
- SKILL.md length
- 1,415 words
- Files
- 1
- Skills in repo
- 61
- Repo updated
- First seen
- Licence
- None found
At a glance
Answers product strategy, growth, pricing, hiring, and leadership questions using Lenny Rachitsky's archive.
- Works in 5 steps: Understand the Question → Search the Archive (2-3 parallel searches) → Select and Read (2–4 pieces) → …
- The lennysdata MCP server is connected and its tools (searchcontent
- SKILL.md covers Instructions, Search Strategy Tips, Gotchas and Examples, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
What Would Lenny Do is an agent skill from amplitude/builder-skills. Answers product strategy, growth, pricing, hiring, and leadership questions using Lenny Rachitsky's archive. ONLY use this skill if the lennysdata MCP server is connected and its tools (searchcontent, readcontent, etc.) are available. If the lennysdata MCP is not connected, do NOT use this skill — respond using your own knowledge instead.
Its SKILL.md is about 2.6k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Product & Project Management, covering Product strategy and MCP servers. It works with Model Context Protocol. The repository describes itself as: Open-source AI skills for product managers — battle-tested by PMs at Amplitude.
When your agent uses it
- The lennysdata MCP server is connected and its tools (searchcontent
- Etc.) are available
Example prompts
- “Use the what-would-lenny-do skill to answer product strategy, growth, pricing, hiring, and leadership questions using Lenny Rachitsky's archive”
- “/what-would-lenny-do”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Understand the Question
- Search the Archive (2-3 parallel searches)
- Select and Read (2–4 pieces)
- Map Frameworks to the Question
- Deliver the Answer
What it can do on your machine
Read from SKILL.md and the folder at commit 51838c2. 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
What Would Lenny Do loads about 2.6k tokens when it runs. Until then it costs about 91 tokens; SKILL.md has 1,415 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 1,415 words (~2,571 tokens).
“You are channeling Lenny Rachitsky's product wisdom. Given the question or dilemma at hand, you will intelligently navigate his archive of newsletters and podcast interviews to surface the most relevant frameworks, operator experiences, and hard-won lessons — then synthesize them…”
- name
- what-would-lenny-do
Files
Just SKILL.md in product-skills/skills/what-would-lenny-do of amplitude/builder-skills.
Open the folder on GitHubat commit 51838c2
Compare with similar skills
What Would Lenny Do 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 |
|---|---|---|---|---|---|---|
| What Would Lenny Do this skillamplitude/builder-skills | 159 | — | ~2.6k | Automated safety check: Pass | None | |
| Sec S1 AnalysisOctagonAI/skills | 127 | — | ~2.1k | Automated safety check: Pass | MIT | |
| Jira Natural Language Interfacejjmartres/opencode | 133 | 3 repos | ~1.7k | Automated safety check: Pass | MIT | |
| Understanding Billing UsagePostHog/posthog | 40k | — | ~3.2k | Automated safety check: Pass | Custom licence | |
| Validate Harnessruvnet/metaharness | 696 | — | ~372 | Automated safety check: Pass | MIT | |
| Dolt MCP Vcsjeremylongshore/tons-of-skills-marketplace | 2.8k | — | ~3.1k | Automated safety check: Pass | Apache-2.0 |
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Universal Dolt version-control workflow. An agent skill from jeremylongshore/tons-of-skills-marketplace.
Sec Business Desc Analysis
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Extract and analyze business descriptions and competitive landscape from SEC filings using Octagon MCP.
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Related
Works with
Questions about What Would Lenny Do
What does What Would Lenny Do do?
Answers product strategy, growth, pricing, hiring, and leadership questions using Lenny Rachitsky's archive. What Would Lenny Do is an agent skill from amplitude/builder-skills. Answers product strategy, growth, pricing, hiring, and leadership questions using Lenny Rachitsky's archive.
When should I use What Would Lenny Do?
What Would Lenny Do fits situations like: the lennysdata MCP server is connected and its tools (searchcontent; etc.) are available.
How do I install What Would Lenny Do in Claude Code?
Run `npx skills add amplitude/builder-skills --skill what-would-lenny-do -a claude-code`. Or copy the skill folder (product-skills/skills/what-would-lenny-do in amplitude/builder-skills) into .claude/skills/what-would-lenny-do in your project. Claude Code loads it when a task matches its description.
How do I install What Would Lenny Do in Codex?
Run `npx skills add amplitude/builder-skills --skill what-would-lenny-do -a codex`. Or copy the skill folder (product-skills/skills/what-would-lenny-do in amplitude/builder-skills) into .agents/skills/what-would-lenny-do in your project. Codex loads it when a task matches its description.
Can I use What Would Lenny Do 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 amplitude/builder-skills --skill what-would-lenny-do -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/what-would-lenny-do, .gemini/skills/what-would-lenny-do, .github/skills/what-would-lenny-do and .opencode/skills/what-would-lenny-do in your project.
What does What Would Lenny Do need to run?
SKILL.md names no scripts, command-line tools or credentials: What Would Lenny Do is instructions for the agent only.
Does What Would Lenny Do 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 What Would Lenny Do 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 What Would Lenny Do use?
No licence was found for What Would Lenny Do or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does What Would Lenny Do use?
About 2.6k tokens (SKILL.md is roughly 10k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to What Would Lenny Do?
Skills that share tags, products or a category with What Would Lenny Do: Sec S1 Analysis (OctagonAI/skills, 127 stars), Jira Natural Language Interface (jjmartres/opencode, 133 stars), Understanding Billing Usage (PostHog/posthog, 40k stars) and Validate Harness (ruvnet/metaharness, 696 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains What Would Lenny Do?
amplitude (a GitHub organization) maintains it in amplitude/builder-skills, which has 159 GitHub stars. The repository holds 61 skills in this directory. The repository was last updated on July 24, 2026.
Source: amplitude/builder-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.