How do I install the Skill Prototype skill?

Run npx skillmds@latest add nyldn/skill-prototype in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

What does the Skill Prototype skill do?

Prototype one risky assumption within a fixed budget, then keep or discard the result It is listed under Finance & Business on SkillMD.

Is Skill Prototype safe to use?

This skill has not completed SkillMD's automated safety review yet. Capability flags: docs only. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Skill Prototype?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Skill Prototype free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Skill Prototype?

nyldn (@nyldn) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Skill Prototype by nyldn — Agent Skill

Name: Skill Prototype
Rating: 4.666666666666667 (3 reviews)
Author: nyldn

File contents

Host: Codex CLI — This skill was designed for Claude Code and adapted for Codex. Cross-reference commands use installed skill names in Codex rather than /octo:* slash commands. Use the active Codex shell and subagent tools. Do not claim a provider, model, or host subagent is available until the current session exposes it. For host tool equivalents, see skills/blocks/codex-host-adapter.md.

Bounded prototype

Use a prototype to answer one named question, not to start implementation by a different name.

Contract

Agree on the question, hypothesis, deadline, artifact path, and success signal before writing. Record the source revision. Store artifacts through scripts/plan-storage.sh, outside the installed plugin cache.

Native read-only plan mode permits a proposal only. Wait for an explicit execution handoff before creating files. Choosing prototype mode does not authorize deployment, provider calls, browser login, repository rewrites, or new permissions.

Stop at the deadline. Return observations, a keep, discard, or inconclusive verdict, and the disposition of each artifact. Automatic cleanup may remove only artifacts created by this run after ownership checks. Retain anything the user changed.

The completion record contains question, hypothesis, deadline, artifact_path, source_revision, observations, verdict, and disposition.

Adapted from prototype in mattpocock/skills at commit 3cca18b368ae95cdbdebbff572ccafa662551015 under the MIT License. See THIRD_PARTY_NOTICES.md.

Frequently asked questions

Skill Prototype