Builds throwaway terminal apps or UI variants to answer one design question.
npx skills add https://github.com/sumitake/agent-collab --skill prototype-sumitake
Please help me install this Agent Skill. Skill: prototype Source: https://github.com/sumitake/agent-collab/tree/main/plugins/agent-collab/skills/prototype Command: npx skills add https://github.com/sumitake/agent-collab --skill prototype-sumitake
?variant= parameter and compiled out of production builds. - Isolation guarantees: Work happens on a throwaway branch or worktree, uses the project's existing tooling and task runner, keeps state in memory, and skips tests and polish. - Use Case: When debating how a checkout state machine should handle a failed payment retry, ask for a prototype and get a keystroke-driven terminal app that exposes the full state after every action. ## Quick Start Ask the agent to prototype the design question you are stuck on, for example: prototype this state model so I can sanity-check the edge cases.High-intent search queries and answers about installing and using this skill.
Build a small interactive terminal app around a pure logic module such as a reducer or explicit state machine. Each keystroke dispatches an action and re-renders the full state, so illegal transitions and awkward cases surface immediately.
Render 3 to 5 structurally different variants on the existing route, switched by a ?variant= URL parameter with a floating switcher bar. Variants must differ in layout and information hierarchy, not just colors, and the whole mechanism must be unreachable in production builds.
No. Prototypes keep state in memory by default because persistence is usually the thing being checked, not a dependency. If the question explicitly involves a database, use a scratch store with a clear wipe-me name.
Skip prototyping when the question can be settled by reading code or a short discussion, since a prototype that answers the wrong question is pure waste. Also avoid it when you cannot isolate the work on a throwaway branch away from the user's current work.
The validated decision or logic module is folded into the real code on the main branch. The prototype itself stays on its throwaway branch as a primary source, with a context pointer from the relevant issue or commit.
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