Project Foundation (100 Series)

The 100 series builds the shared understanding that makes feature design and implementation more predictable. Each skill produces a document that downstream workflows read instead of rediscovering the same context from scratch.

Why this series exists

When agents, developers, and reviewers all share the same written context — domain language, architecture decisions, data model, UX conventions — feature design runs faster, implementation produces fewer surprises, and reviews are more coherent.

The documents it produces

Skill	Output path	What it captures
`100-domain-knowledge`	`.specflow/context/domain-knowledge.md`	Market, users, terminology, constraints, differentiators
`101-project-overview`	`.specflow/docs/D01-project-overview.md`	Product definition, user goals, success metrics
`102-system-architecture`	`.specflow/docs/D02-system-architecture.md`	Stack, components, deployment, testing strategy
`103-common-data-model`	`.specflow/docs/D03-common-data-model.md`	Entities, relationships, business rules
`104-backend-architecture`	`.specflow/docs/D04-backend-architecture.md`	API design, service layering, auth, security
`105-frontend-architecture`	`.specflow/docs/D05-frontend-architecture.md`	Component structure, state, routing, styling
`106-ui-design`	`.specflow/docs/D06-ui-design.md`	Design system, color, typography, visual philosophy
`107-ui-experience`	`.specflow/docs/D07-ui-experience.md`	Navigation, page inventory, interaction patterns
`108-ui-page-design`	`.specflow/docs/D08-ui-pages/<name>/`	Per-page layout spec and HTML mockup
`110-feature-overview`	`.specflow/docs/D10-feature-overview.md`	Capabilities and thin vertical feature slices

Recommended sequence

Run these in order when starting fresh. On existing projects, run only what is missing or stale.

100 → 101 → 102 → 103 → 104 → 105 → 106 → 107 → [108 per page] → 110

Each document references the ones before it. Running out of order is possible but produces weaker results.

Skills in this series

100 Domain Knowledge — research the domain before planning
101 Project Overview — define the product
102 System Architecture — record the stack and structure
103 Common Data Model — map the entities and rules
104 Backend Architecture — specify the server-side patterns
105 Frontend Architecture — specify the client-side patterns
106 UI Design — establish the visual design system
107 UI Experience — define the UX model and page inventory
108 UI Page Design — design one page in detail
110 Feature Overview — map the feature backlog