Falsify
sickn33/agentic-awesome-skills
The scientific thinking protocol for AI agents. An agent skill from sickn33/agentic-awesome-skills.
Test a consequential technical assumption with a small, falsifiable experiment before committing to an approach.
MITAuto-check passed
Install Assumption Test
$ npx skills add Neeeophytee/finding-unknowns-skills --skill assumption-test -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Neeeophytee/finding-unknowns-skills assumption-test --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/Neeeophytee/finding-unknowns-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/assumption-test .claude/skills/assumption-test && 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 "assumption-test" agent skill from https://github.com/Neeeophytee/finding-unknowns-skills/tree/main/skills/assumption-test into .claude/skills/assumption-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "assumption-test", 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/Neeeophytee/finding-unknowns-skills/tree/main/skills/assumption-testType 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 Neeeophytee/finding-unknowns-skills --skill assumption-test -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Neeeophytee/finding-unknowns-skills assumption-test --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Neeeophytee/finding-unknowns-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/assumption-test .agents/skills/assumption-test && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "assumption-test" agent skill from https://github.com/Neeeophytee/finding-unknowns-skills/tree/main/skills/assumption-test into .agents/skills/assumption-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "assumption-test", 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 Neeeophytee/finding-unknowns-skills --skill assumption-test -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Neeeophytee/finding-unknowns-skills assumption-test --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Neeeophytee/finding-unknowns-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/assumption-test .cursor/skills/assumption-test && 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 "assumption-test" agent skill from https://github.com/Neeeophytee/finding-unknowns-skills/tree/main/skills/assumption-test into .cursor/skills/assumption-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "assumption-test", 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/Neeeophytee/finding-unknowns-skills.git --path skills/assumption-test--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 Neeeophytee/finding-unknowns-skills --skill assumption-test -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Neeeophytee/finding-unknowns-skills assumption-test --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Neeeophytee/finding-unknowns-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/assumption-test .gemini/skills/assumption-test && 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 "assumption-test" agent skill from https://github.com/Neeeophytee/finding-unknowns-skills/tree/main/skills/assumption-test into .gemini/skills/assumption-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "assumption-test", 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 Neeeophytee/finding-unknowns-skills assumption-testInstalls 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 Neeeophytee/finding-unknowns-skills --skill assumption-test -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Neeeophytee/finding-unknowns-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/assumption-test .github/skills/assumption-test && 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 "assumption-test" agent skill from https://github.com/Neeeophytee/finding-unknowns-skills/tree/main/skills/assumption-test into .github/skills/assumption-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "assumption-test", 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 Neeeophytee/finding-unknowns-skills --skill assumption-test -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Neeeophytee/finding-unknowns-skills assumption-test --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Neeeophytee/finding-unknowns-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/assumption-test .opencode/skills/assumption-test && 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 "assumption-test" agent skill from https://github.com/Neeeophytee/finding-unknowns-skills/tree/main/skills/assumption-test into .opencode/skills/assumption-test/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "assumption-test", 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
assumption-test- GitHub stars
- 343
- Token cost
- ~631 tokens
- SKILL.md length
- 317 words
- Files
- 1
- Skills in repo
- 14
- Repo updated
- First seen
- Licence
- MIT
At a glance
Test a consequential technical assumption with a small, falsifiable experiment before committing to an approach.
- Works in 5 steps: Read the request, relevant code, and… → State the assumption as an observable… → Design the smallest discriminating… → …
- A plan depends on uncertain runtime
- SKILL.md covers Steps and Guardrails
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Assumption Test is an agent skill from Neeeophytee/finding-unknowns-skills. Test a consequential technical assumption with a small, falsifiable experiment before committing to an approach. Use when a plan depends on uncertain runtime, integration, or data behavior that inspection alone cannot establish. Not for preference interviews or routine implementation.
Its SKILL.md is about 630 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: 14 installable skills for Claude Code, OpenAI Codex, and Hermes: find unknowns, clarify requirements, manage context, test assumptions, and verify bug fixes with regression… The licence is MIT.
When your agent uses it
- A plan depends on uncertain runtime
- Data behavior that inspection alone cannot establish
Example prompts
- “/assumption-test”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Read the request, relevant code, and existing evidence. If inspection already settles the question, cite that evidence and stop; do not…
- State the assumption as an observable prediction. Define what would refute it, what would support it within the tested scope, and what…
- Design the smallest discriminating experiment. Use an isolated fixture or test environment, the real component under question where…
- Run the experiment within the user's authorized scope. Preserve the command, relevant inputs, actual output, and environment details…
- Close with the assumption, method, observation, verdict (supported within scope, refuted, or inconclusive), and the planning decision this…
What it can do on your machine
Read from SKILL.md and the folder at commit ca5696a. 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
Assumption Test loads about 631 tokens when it runs. Until then it costs about 75 tokens; SKILL.md has 317 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 Neeeophytee/finding-unknowns-skills at commit ca5696a, republished under its MIT licence (© Neeeophytee). 317 words, ~631 tokens.
Download SKILL.mdSave it as
.claude/skills/assumption-test/SKILL.md (or your agent's skills folder).- name
- assumption-test
- description
- Test a consequential technical assumption with a small, falsifiable experiment before committing to an approach. Use when a plan depends on uncertain runtime, integration, or data behavior that inspection alone cannot establish. Not for preference interviews or routine implementation.
Assumption test
A plausible assumption can survive every planning conversation and still fail on contact with the system. Turn the consequential uncertainty into a question an experiment can answer.
Steps
- Read the request, relevant code, and existing evidence. If inspection already settles the question, cite that evidence and stop; do not manufacture an experiment. If several assumptions remain, select the one whose failure would most change the approach.
- State the assumption as an observable prediction. Define what would refute it, what would support it within the tested scope, and what would leave it inconclusive. Set those criteria before observing the result.
- Design the smallest discriminating experiment. Use an isolated fixture or test environment, the real component under question where available, and a bounded number of operations. Name what the setup cannot represent; a mock's behavior is not evidence about its provider.
- Run the experiment within the user's authorized scope. Preserve the command, relevant inputs, actual output, and environment details needed to reproduce it. If a tool or dependency is unavailable, report the experiment as unrun or inconclusive, with the missing prerequisite.
- Close with the assumption, method, observation, verdict (supported within scope, refuted, or inconclusive), and the planning decision this evidence changes. Recommend the next discriminating check only if it could change that decision. Keep temporary code separate from the production implementation.
Guardrails
- One successful trial does not establish a universal claim. State the tested conditions and remaining uncertainty, particularly for concurrency and performance.
- Do not use production writes, real payments, destructive operations, or newly incurred costs without authorization. An experiment does not grant additional permissions.
- Distinguish the component failing from the experiment failing to run. Never turn missing access or a broken fixture into a verdict about the system.
- Do not fix the implementation or broaden into a build unless the user requested it. The deliverable is evidence that informs a decision.
© Neeeophytee, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/assumption-test of Neeeophytee/finding-unknowns-skills.
Open the folder on GitHubat commit ca5696a
Compare with similar skills
Assumption Test 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 |
|---|---|---|---|---|---|---|
| Assumption Test this skillNeeeophytee/finding-unknowns-skills | 343 | — | ~631 | Automated safety check: Pass | MIT | |
| Falsifysickn33/agentic-awesome-skills | 47k | 1 repos | ~7.7k | Automated safety check: Pass | MIT | |
| Finding ExperimentsPostHog/posthog | 40k | — | ~783 | Automated safety check: Pass | Custom licence | |
| ExperimentsArize-ai/phoenix | 12k | — | ~1.8k | Automated safety check: Pass | Custom licence | |
| Prioritize Assumptionsphuryn/pm-skills | 27k | — | ~571 | Automated safety check: Pass | MIT | |
| Scroll Experiencesickn33/agentic-awesome-skills | 47k | 2 repos | ~534 | Automated safety check: Pass | MIT |
Similar skills
- Official
Finding Experiments
PostHog/posthog
Resolves a PostHog experiment reference from natural language to a concrete experiment ID by browsing experiment-list (not feature-flag tools), with disambiguation when multiple experiments match.
Experiments
Arize-ai/phoenix
Run, read, and compare dataset-backed experiments to find evidence that a prompt or pipeline is improving.
Prioritize Assumptions
phuryn/pm-skills
Prioritize assumptions using an Impact × Risk matrix and suggest experiments for each.
Scroll Experience
sickn33/agentic-awesome-skills
Expert in building immersive scroll-driven experiences - parallax storytelling, scroll animations, interactive narratives, and cinematic web experiences.
Webgl Experience
nexu-io/open-design
A full-screen, real-time WebGL/WebGL2 experience — animated shaders, 3D scenes, generative visuals, particle fields — rendered live on the GPU with a typographic overlay.
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Questions about Assumption Test
What does Assumption Test do?
Test a consequential technical assumption with a small, falsifiable experiment before committing to an approach. Assumption Test is an agent skill from Neeeophytee/finding-unknowns-skills. Test a consequential technical assumption with a small, falsifiable experiment before committing to an approach.
When should I use Assumption Test?
Assumption Test fits situations like: A plan depends on uncertain runtime; data behavior that inspection alone cannot establish.
How do I install Assumption Test in Claude Code?
Run `npx skills add Neeeophytee/finding-unknowns-skills --skill assumption-test -a claude-code`. Or copy the skill folder (skills/assumption-test in Neeeophytee/finding-unknowns-skills) into .claude/skills/assumption-test in your project. Claude Code loads it when a task matches its description.
How do I install Assumption Test in Codex?
Run `npx skills add Neeeophytee/finding-unknowns-skills --skill assumption-test -a codex`. Or copy the skill folder (skills/assumption-test in Neeeophytee/finding-unknowns-skills) into .agents/skills/assumption-test in your project. Codex loads it when a task matches its description.
Can I use Assumption Test 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 Neeeophytee/finding-unknowns-skills --skill assumption-test -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/assumption-test, .gemini/skills/assumption-test, .github/skills/assumption-test and .opencode/skills/assumption-test in your project.
What does Assumption Test need to run?
SKILL.md names no scripts, command-line tools or credentials: Assumption Test is instructions for the agent only.
Does Assumption Test 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 Assumption Test 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 Assumption Test use?
Assumption Test 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 Assumption Test use?
About 631 tokens (SKILL.md is roughly 2.5k 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 Assumption Test?
Skills that share tags, products or a category with Assumption Test: Falsify (sickn33/agentic-awesome-skills, 47k stars), Finding Experiments (PostHog/posthog, 40k stars), Experiments (Arize-ai/phoenix, 12k stars) and Prioritize Assumptions (phuryn/pm-skills, 27k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Assumption Test?
Neeeophytee (a GitHub user) maintains it in Neeeophytee/finding-unknowns-skills, which has 343 GitHub stars. The repository holds 14 skills in this directory. The repository was last updated on September 28, 2026.
Source: Neeeophytee/finding-unknowns-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.