Lightweight discovery: use for informal exploration, question-only requests, or cases where writing a file would be overhead. Ask the 1-3 most important questions, or summarize what is already known. End with a concise chat summary and any open questions.
Full discovery: use when the topic is complex, the answers will feed future planning or implementation, or the user asks for a design artifact. Ask a focused batch of 3-7 questions, iterate as needed, and write a standalone design artifact at the end.

Ask questions only when the answers change the design understanding. Keep each batch answerable, never more than 7 questions at once. Prioritize by importance. Start high-level, then go deeper when needed.

Possible themes:

Goal/outcome (what success looks like)
Audience/user and context
Constraints (time, budget, tech, tone, scope)
Current state (what exists today, what to avoid)
Known pain points and failure modes
Key assumptions and unknowns

Call out edge cases, abuse cases, and unclear scenarios. Name underspecified requirements plainly.

At the end of discovery, decide whether to save a design artifact:

Write a standalone design artifact when the user asks for one, the discovery found decisions or constraints that should not be lost, or future planning/implementation is likely to depend on the result.
Otherwise, summarize the useful conclusions in chat and do not write a file.

Announce at start: "I'm using the discovery skill to understand the design space."

Principles Use

Use the top-level principles to choose questions and summarize answers.
Read deeper details from the principles skill when needed: shape code by domain, keep boundaries sharp, states are values, evolve contracts deliberately, performance is not optional, and design for operation.
Use principle names for design facts, tradeoffs, and risks.
Capture domain terms, state models, trust boundaries, long-lived contracts, operational constraints, and risks in artifacts.

Design Artifact

The artifact is a design document, not a plan or a review.

A design records the problem understanding, goals, constraints, decisions, options, tradeoffs, ruled-out approaches, risks, edge cases, and open questions.
A plan gives concrete implementation steps for building part of a design.
A review lists findings about an artifact, such as an implementation, plan, or design.

Save designs to: <repository-root>/designs/YYYY-MM-DD_HH:MM_<design-name>.md

Create designs/ if it does not exist.

Use this structure as the default, but adapt section names and add/remove sections when the topic needs it:

# Design: <Name>

## Summary
<1-3 sentences describing the problem, intended outcome, and current design understanding.>

## Context
<Relevant background, users/audience, existing state, constraints, and why this matters.>

## Goals
<Bulleted outcomes this design should support.>

## Non-Goals
<Bulleted boundaries for what this design is not trying to solve. Skip if not useful.>

## What We Learned
<Important discoveries, domain facts, user needs, constraints, assumptions, and edge cases.>

## Design Shape
<Current conceptual model, requirements, principles, interfaces, UX shape, system behavior, or other design-relevant structure. Keep this at design level, not implementation-task level.>

## Options Considered
<Candidate approaches, including approaches ruled out. Capture why they matter and why they were accepted, rejected, or deferred.>

## Risks and Edge Cases
<Known failure modes, abuse cases, unclear scenarios, and places where the design may break down.>

## Open Questions
<Unresolved decisions or unknowns that future discovery, planning, or review should address. Skip only if none remain.>

Artifact Rules

Write a design artifact only at the end of discovery and only when the result should be saved, unless the user explicitly asks to continue discovery.
Do not write a design artifact when the user asks not to write files or only wants a lightweight discussion.
When not writing an artifact, end with a concise chat summary of the current understanding, important tradeoffs, and open questions.
The design MUST be standalone; do not rely on the prior chat.
Preserve learnings that are likely to matter later, especially constraints, rejected approaches, and unresolved questions.
Do not include ordered implementation tasks, file-level change lists, verification commands, or roadmaps.
Do not force every section when it would add noise; keep the artifact useful.
If the user asks to move from discovery into planning or implementation, offer to save a design artifact first only when important context would otherwise be lost.

Interaction Notes

Embrace depth.
Do not create plans, roadmaps, implementation steps, or code.
If the user asks for a plan or code, switch out of discovery when enough context exists. If the design context is substantial and not yet captured, ask whether to save it before switching.

discovery

Discovery

Overview