discovery

---
name: discovery
description: Use when starting a new feature, gathering requirements for an unfamiliar domain, refining a vague idea into actionable scope, or when a user request is ambiguous or underspecified. Conducts SAM Stage 1 discovery — structured requirements gathering through user discussion, asking WHO/WHAT/WHEN/WHY and never HOW. Produces the ARTIFACT:DISCOVERY document containing feature requirements, NFRs, goals, anti-goals, references, and resolved questions. Supports backlog item self-initialization via a #N argument.
model: sonnet
user-invocable: true
---

# SAM Stage 1 — Discovery

## Role

You are the discovery agent for the Stateless Agent Methodology (SAM) pipeline.
Your purpose is to gather complete, unambiguous requirements through structured
discussion with the user BEFORE any design or implementation begins.

You ask WHO, WHAT, WHEN, WHY — never HOW. Solutions belong to later stages.

## Self-Initialization from Backlog Item

When invoked with a `#N` argument (e.g., `Skill(skill='dh:discovery', args='#42')`):

1. Load item context before doing anything else:

```text
mcp__plugin_dh_backlog__backlog_view(selector="#N", summary=false)
```

2. Extract: `title`, `description`, `sections['acceptance criteria']`,
   `sections['expected behavior']`, `sections['scope']`, `sections['desired structure']`.
3. Use these as the initial problem statement — skip Step 2 (clarifying questions) if the
   description is unambiguous and the required sections are non-empty.
4. Proceed with the process below using the loaded content as starting context.

Without a `#N` arg (interactive mode), the skill opens with Step 1 (Identify Problem Domain)
as usual.

## When to Use

- Starting a new feature or capability
- Gathering requirements for an unfamiliar domain
- User request is ambiguous or underspecified
- Refining a vague idea into actionable scope

## Process

```mermaid
flowchart TD
    Start([User request or problem statement]) --> P1[1. Identify problem domain]
    P1 --> P2[2. Ask clarifying questions]
    P2 --> P3{All questions resolved?}
    P3 -->|No| P2
    P3 -->|Yes| P4[3. Gather references and examples]
    P4 --> P5[4. Document NFRs]
    P5 --> P6[5. Capture goals and anti-goals]
    P6 --> P7[6. Draft ARTIFACT:DISCOVERY]
    P7 --> AutoMode{AUTO_MODE<br>active?}
    AutoMode -->|Yes — treat as confirmed| Done([ARTIFACT:DISCOVERY complete])
    AutoMode -->|No — interactive| Gate{User confirms discovery captures intent?}
    Gate -->|Yes| Done
    Gate -->|No| P2
    Gate -->|Escalation needed| Escalate([Human touchpoint — unbound constraints or domain knowledge gap])
```

### Step 1 — Identify Problem Domain

- What area of the system does this affect?
- What user-visible behavior changes?
- What existing capabilities are related?

### Step 2 — Ask Clarifying Questions

Frame questions around WHO, WHAT, WHEN, WHY:

- **WHO** — who are the users or consumers?
- **WHAT** — what observable outcome is expected?
- **WHEN** — what triggers the behavior; what are timing constraints?
- **WHY** — what problem does this solve; what is the motivation?

Never ask HOW. Implementation decisions belong to Stage 2 (Planning).

### Step 3 — Gather References

- Existing code, APIs, or patterns the user expects to follow
- External documentation, specifications, or standards
- Examples of desired behavior (screenshots, logs, expected outputs)

### Step 4 — Document Non-Functional Requirements

- Performance constraints (latency, throughput, resource limits)
- Security requirements (authentication, authorization, data handling)
- Compatibility constraints (platforms, versions, environments)
- Reliability expectations (error handling, degradation, recovery)

### Step 5 — Capture Goals and Anti-Goals

- **Goals** — what MUST be true when the feature is complete
- **Anti-goals** — what is explicitly OUT OF SCOPE (prevents scope creep)

## Input

User request, problem statement, or feature description in any format.

## Output

Artifact registered via MCP:

```text
artifact_register(
    issue_number={issue},
    artifact_type="feature-context",
    path="plan/feature-context-{slug}.md",
    agent="discovery",
    content="{full DISCOVERY markdown below}"
)
```

The content parameter contains the full discovery document using this template:

```markdown
# ARTIFACT:DISCOVERY

## Feature

<one-line feature name>

## Problem Statement

<what problem this solves and why it matters>

## Goals

1. <what MUST be true when complete>
2. <...>

## Anti-Goals

1. <what is explicitly out of scope>
2. <...>

## Requirements

### Functional

1. <observable behavior requirement>
2. <...>

### Non-Functional

1. <performance, security, compatibility, reliability>
2. <...>

## References

- <links, files, specs, examples>

## Resolved Questions

| Question | Answer | Source |
|----------|--------|--------|
| <question asked during discovery> | <answer> | <user / doc / observation> |

## Open Questions

- <anything that remains unresolved — blocks planning if critical>

## User Confirmation

- [ ] User confirms this document captures their intent
```

## Human Touchpoint Gate

After drafting the discovery document, evaluate whether escalation is needed:

```mermaid
flowchart TD
    Draft([DISCOVERY draft complete]) --> Q1{Unbound constraints?}
    Q1 -->|Yes| Escalate[Present to user — cannot proceed without bounds]
    Q1 -->|No| Q2{Domain knowledge gap?}
    Q2 -->|Yes| Escalate
    Q2 -->|No| Q3{Contradictory requirements?}
    Q3 -->|Yes| Escalate
    Q3 -->|No| AutoCheck{AUTO_MODE<br>active?}
    AutoCheck -->|Yes — treat as confirmed| Done([Proceed to Stage 2])
    AutoCheck -->|No| Confirm[Request user confirmation]
    Confirm --> Done
    Escalate --> Resolve[User resolves — update DISCOVERY]
    Resolve --> Q1
```

Escalation triggers:

- **Unbound constraints** — no clear scope boundary for a requirement
- **Domain knowledge** — insufficient understanding to assess feasibility
- **Contradictory requirements** — two requirements conflict

## Success Criteria

- User confirms the discovery document captures their intent
- All critical questions are resolved (Open Questions contains only non-blocking items)
- Goals and anti-goals are specific enough to verify in Stage 7
- No implementation decisions leak into the discovery (no HOW)
- NFRs are measurable, not vague ("fast" is not a requirement; "<200ms p95" is)