# Domain Concepts

## Agent Roles

| Role | Responsibility |
|------|----------------|
| Lead | Primary orchestrator — decomposes work, delegates, synthesizes |
| Coder | Implementation-focused coding |
| Reviewer | Code quality, correctness, security review |
| Tester | Functional and adversarial testing |
| Explorer | Fast codebase mapping and discovery |
| Researcher | Deep technical investigation |
| Librarian | Documentation coverage and accuracy |
| Critic | Pre-implementation gate and blocker resolution |
| SME | Domain-specific consultation |
| Designer | UI/UX interaction and visual guidance |

## Memory Categories

| Category | Purpose | Location |
|----------|---------|----------|
| Knowledge | Persistent project understanding | `.memory/knowledge/` |
| Decisions | Architecture Decision Records | `.memory/decisions.md` |
| Plans | Active implementation plans | `.memory/plans/` |
| Research | Technical investigations | `.memory/research/` |
| Gates | Quality gate records | `.memory/gates/` |
| Sessions | Session continuity | `.memory/sessions/` |

## Quality Pipeline Flow

Standard flow: `explorer/researcher → coder → reviewer → tester → librarian`

Exceptions:
- Tier 3: skips tester
- Tier 1: adds security reviewer and adversarial tester