Hypothesis Formulation
aiming-lab/AutoResearchClaw
Guides turning an observation into testable, falsifiable hypotheses with null and alternative statements, competing explanations and predictions tied to experimental design.
Formulate clear, testable hypotheses for product experiments.
MITAuto-check passed
Install Hypothesis Design
$ npx skills add itseffi/agentic-os --skill hypothesis-design -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install itseffi/agentic-os hypothesis-design --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/itseffi/agentic-os.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/hypothesis-design .claude/skills/hypothesis-design && 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 "hypothesis-design" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/hypothesis-design into .claude/skills/hypothesis-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hypothesis-design", 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/itseffi/agentic-os/tree/main/.agents/skills/hypothesis-designType 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 itseffi/agentic-os --skill hypothesis-design -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install itseffi/agentic-os hypothesis-design --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/itseffi/agentic-os.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/hypothesis-design .agents/skills/hypothesis-design && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "hypothesis-design" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/hypothesis-design into .agents/skills/hypothesis-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hypothesis-design", 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 itseffi/agentic-os --skill hypothesis-design -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install itseffi/agentic-os hypothesis-design --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/itseffi/agentic-os.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/hypothesis-design .cursor/skills/hypothesis-design && 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 "hypothesis-design" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/hypothesis-design into .cursor/skills/hypothesis-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hypothesis-design", 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/itseffi/agentic-os.git --path .agents/skills/hypothesis-design--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 itseffi/agentic-os --skill hypothesis-design -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install itseffi/agentic-os hypothesis-design --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/itseffi/agentic-os.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/hypothesis-design .gemini/skills/hypothesis-design && 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 "hypothesis-design" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/hypothesis-design into .gemini/skills/hypothesis-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hypothesis-design", 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 itseffi/agentic-os hypothesis-designInstalls 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 itseffi/agentic-os --skill hypothesis-design -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/itseffi/agentic-os.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/hypothesis-design .github/skills/hypothesis-design && 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 "hypothesis-design" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/hypothesis-design into .github/skills/hypothesis-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hypothesis-design", 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 itseffi/agentic-os --skill hypothesis-design -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install itseffi/agentic-os hypothesis-design --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/itseffi/agentic-os.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/hypothesis-design .opencode/skills/hypothesis-design && 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 "hypothesis-design" agent skill from https://github.com/itseffi/agentic-os/tree/main/.agents/skills/hypothesis-design into .opencode/skills/hypothesis-design/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hypothesis-design", 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
hypothesis-design- GitHub stars
- 115
- Token cost
- ~394 tokens
- SKILL.md length
- 161 words
- Files
- 2
- Skills in repo
- 29
- Repo updated
- First seen
- Licence
- MIT
At a glance
Formulate clear, testable hypotheses for product experiments.
- Works in 5 steps: Identify the Experiment Goal → Draft Hypothesis Statement → Check for Specificity → …
- Designing experiments to validate solutions
- SKILL.md covers When to Use, The Process, Quality Check and When Not to Use
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Hypothesis Design is an agent skill from itseffi/agentic-os. Formulate clear, testable hypotheses for product experiments. Use when designing experiments to validate solutions.
Its SKILL.md is about 390 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).
The repository describes itself as: Agentic personal OS to automate high-leverage workflows with Codex, Claude Code, Pi, OpenClaw and other coding agents/ runtime platforms. The licence is MIT.
When your agent uses it
- Designing experiments to validate solutions
Example prompts
- “/hypothesis-design”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit e54d0ac. 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
Hypothesis Design loads about 394 tokens when it runs. Until then it costs about 33 tokens; SKILL.md has 161 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
The full file from itseffi/agentic-os at commit e54d0ac, republished under its MIT licence (© itseffi). 161 words, ~394 tokens.
Download SKILL.mdSave it as
.claude/skills/hypothesis-design/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- hypothesis-design
- description
- Formulate clear, testable hypotheses for product experiments. Use when designing experiments to validate solutions.
Product Hypothesis Design
Formulate clear, testable hypotheses for product experiments.
When to Use
When you have a product problem and need to design an experiment to validate a solution.
The Process
1. Identify the Experiment Goal
- What user problem are you addressing?
- What change do you think will help?
2. Draft Hypothesis Statement
Use this structure:
[Action] will cause [Outcome] to [Direction] for [Users] under [Conditions]All 5 components required:
- Action: What you're doing
- Outcome: What metric changes
- Direction: Increase/decrease/improve
- Users: Who's affected
- Conditions: When/where this applies
3. Check for Specificity
- Is the action clearly defined?
- Is the outcome measurable?
- Are users and conditions specific?
4. Develop Measurement Plan
- What metrics prove success?
- How will you collect data?
- What's the sample size?
5. Narrative Check
Convert to story format:
Currently, [user] is experiencing [problem].
We believe that by [change], we'll see [outcome].
We'll know we're right when [metric] changes by [amount].Quality Check
- Is the hypothesis falsifiable?
- Can you measure the outcome?
- Is the timeframe realistic?
- Are success criteria clear?
When Not to Use
Do not use this skill when the request is unrelated, low-stakes, or better handled by a simpler direct response.
© itseffi, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file in .agents/skills/hypothesis-design of itseffi/agentic-os.
- SKILL.md
- agents/openai.yaml
Open the folder on GitHubat commit e54d0ac
Compare with similar skills
Hypothesis Design 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 |
|---|---|---|---|---|---|---|
| Hypothesis Design this skillitseffi/agentic-os | 115 | — | ~394 | Automated safety check: Pass | MIT | |
| Hypothesis Formulationaiming-lab/AutoResearchClaw | 15k | — | ~628 | Automated safety check: Pass | MIT | |
| Experiment Designeralirezarezvani/claude-skills | 28k | 1 repos | ~783 | Automated safety check: Pass | MIT | |
| Designing Experimentsforyourhealth111-pixel/Vibe-Skills | 3.6k | — | ~600 | Automated safety check: Pass | Apache-2.0 | |
| Design Systemaffaan-m/ECC | 275k | — | ~698 | Automated safety check: Pass | MIT | |
| Design Guidepaperclipai/paperclip | 99k | 1 repos | ~3.1k | Automated safety check: Pass | MIT |
Similar skills
Experiment Designer
alirezarezvani/claude-skills
A skill your agent uses when planning product experiments, writing testable hypotheses, estimating sample size, prioritizing tests, or interpreting A/B outcomes with practical statistical rigor.
Designing Experiments
foryourhealth111-pixel/Vibe-Skills
Design experiments and quasi-experiments before analysis. An agent skill from foryourhealth111-pixel/Vibe-Skills.
Design System
affaan-m/ECC
Generate a design system from an existing codebase or audit one for visual consistency: extract tokens (colors, typography, spacing, shadows) into design-tokens.json and CSS custom properties with…
Design Guide
paperclipai/paperclip
Paperclip UI design system guide for building consistent, reusable frontend components.
Design Audit Against Rams' Principles
thedotmack/claude-mem
Audits a design against Dieter Rams' ten principles of good design, scores each with evidence, and hands off a make-plan prompt for a new, refined or redesigned outcome.
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Questions about Hypothesis Design
What does Hypothesis Design do?
Formulate clear, testable hypotheses for product experiments. Hypothesis Design is an agent skill from itseffi/agentic-os. Formulate clear, testable hypotheses for product experiments.
When should I use Hypothesis Design?
Hypothesis Design fits situations like: designing experiments to validate solutions.
How do I install Hypothesis Design in Claude Code?
Run `npx skills add itseffi/agentic-os --skill hypothesis-design -a claude-code`. Or copy the skill folder (.agents/skills/hypothesis-design in itseffi/agentic-os) into .claude/skills/hypothesis-design in your project. Claude Code loads it when a task matches its description.
How do I install Hypothesis Design in Codex?
Run `npx skills add itseffi/agentic-os --skill hypothesis-design -a codex`. Or copy the skill folder (.agents/skills/hypothesis-design in itseffi/agentic-os) into .agents/skills/hypothesis-design in your project. Codex loads it when a task matches its description.
Can I use Hypothesis Design 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 itseffi/agentic-os --skill hypothesis-design -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/hypothesis-design, .gemini/skills/hypothesis-design, .github/skills/hypothesis-design and .opencode/skills/hypothesis-design in your project.
What does Hypothesis Design need to run?
SKILL.md names no scripts, command-line tools or credentials: Hypothesis Design is instructions for the agent only.
Does Hypothesis Design 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 Hypothesis Design 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 Hypothesis Design use?
Hypothesis Design is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Hypothesis Design use?
About 394 tokens (SKILL.md is roughly 1.6k 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 Hypothesis Design?
Skills that share tags, products or a category with Hypothesis Design: Hypothesis Formulation (aiming-lab/AutoResearchClaw, 15k stars), Experiment Designer (alirezarezvani/claude-skills, 28k stars), Designing Experiments (foryourhealth111-pixel/Vibe-Skills, 3.6k stars) and Design System (affaan-m/ECC, 275k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Hypothesis Design?
itseffi (a GitHub user) maintains it in itseffi/agentic-os, which has 115 GitHub stars. The repository holds 29 skills in this directory. The repository was last updated on October 7, 2026.
Source: itseffi/agentic-os on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.