Domain Population Skill

Populates the domain specification files with content extracted from change context.

Purpose

During implementation, this skill:

• Updates specs/domain/glossary.md with discovered entities
• Creates entity definition stubs in specs/domain/definitions/
• Creates use-case stubs in specs/domain/use-cases/
• Updates specs/SNAPSHOT.md with product overview

When to Use

• During /sdd I want to start implementing to execute domain updates from SPEC.md
• When importing domain concepts from external specs during implementation

Usage

This skill uses the system CLI for deterministic file creation:

cat << 'EOF' | <plugin-root>/system/system-run.sh scaffolding domain --config -
{
    "target_dir": "/path/to/project",
    "primary_domain": "Task Management",
    "product_description": "Task management for engineering teams",
    "user_personas": [
        {"type": "Project Manager", "actions": "create projects, assign tasks"},
        {"type": "Team Member", "actions": "update progress"}
    ],
    "core_workflows": ["Create projects", "Assign tasks", "Update progress"],
    "domain_entities": ["Team", "Project", "Task", "User"]
}
EOF

Input

Schema: schemas/input.schema.json

Accepts target directory, domain name, product description, and optional personas, workflows, and entities.

Output

Schema: schemas/output.schema.json

Returns success status and list of updated domain spec files.

File Templates

Glossary Entry Format

For each entity, add a row to specs/domain/glossary.md:

| <Entity> | <Brief definition> | <Related terms> |

Entity Definition Stub

Creates specs/domain/definitions/<entity-slug>.md:

---
name: <Entity>
domain: <primary_domain>
status: draft
---

# <Entity>

## Description

<Placeholder - what role this entity plays based on discovery context>

## Attributes

| Attribute | Type | Description |
|-----------|------|-------------|
| (to be defined) | | |

## Relationships

- (to be defined)

## States (if applicable)

(to be defined)

Use-Case Stub

Creates specs/domain/use-cases/<workflow-slug>.md:

---
name: <Workflow>
domain: <primary_domain>
actors: <relevant user types>
status: draft
---

# <Workflow>

## Summary

<Placeholder - what this capability allows users to do>

## Actors

- <User type from SPEC.md>

## Preconditions

(to be defined)

## Main Flow

1. (to be defined)

## Postconditions

(to be defined)

SNAPSHOT.md Product Overview

Adds to specs/SNAPSHOT.md:

## Product Overview

**Problem:** <product_description>

**Target Users:**
- <User type 1>: <what they do>
- <User type 2>: <what they do>

**Core Capabilities:**
- <Capability 1>
- <Capability 2>

**Key Entities:** <Entity1>, <Entity2>, <Entity3>

Example

Input

{
    "target_dir": "/Users/dev/my-task-tracker",
    "primary_domain": "Task Management",
    "product_description": "Task management for engineering teams",
    "user_personas": [
        {"type": "Project Manager", "actions": "create projects, assign tasks"},
        {"type": "Team Member", "actions": "update progress, view assignments"}
    ],
    "core_workflows": [
        "Create projects",
        "Assign tasks",
        "Update task progress"
    ],
    "domain_entities": ["Team", "Project", "Task", "User"]
}

Output

Populating domain specs for: Task Management

Creating entity definitions...
  Created: specs/domain/definitions/team.md
  Created: specs/domain/definitions/project.md
  Created: specs/domain/definitions/task.md
  Created: specs/domain/definitions/user.md

Creating use-case stubs...
  Created: specs/domain/use-cases/create-projects.md
  Created: specs/domain/use-cases/assign-tasks.md
  Created: specs/domain/use-cases/update-task-progress.md

Updating glossary...
  Updated: specs/domain/glossary.md

Updating SNAPSHOT...
  Updated: specs/SNAPSHOT.md

============================================================
Domain population complete!
============================================================
Created 4 entity definitions
Created 3 use-case stubs
Updated glossary with 4 entries
Updated SNAPSHOT with product overview

Notes

• Uses system CLI for deterministic file creation
• Preserves existing content in glossary and SNAPSHOT (appends/merges)
• Creates slugified filenames (lowercase, hyphens)
• All files are stubs meant to be filled in later