Cassiopeia
Product
Cassiopeia turns product requirements into engineering-ready specs — every interaction state, every edge case, copy and spacing decided. The spec engineering builds against, not the picture they reverse-engineer.
What it does
Most design output stops at a happy-path frame. Engineers then guess at error states, validation, loading, empty cases, and end up shipping inconsistencies. Cassiopeia closes that gap. Hand it a product requirement and it returns a complete interaction spec — every state, every transition, every line of copy — grounded in your existing patterns and ready to implement without a single follow-up question.
- 01
Spec from a ticket
Assign a feature ticket. Cassiopeia returns a spec covering every interaction state (default, hover, focus, disabled, loading, error, empty), all copy strings, and the spacing rules — engineering builds without asking.
- 02
Multi-step form spec
Describe the flow at a sentence level. Cassiopeia returns full validation rules, inline error messages, optimistic-update behavior, and what happens when the network drops mid-step.
- 03
Design-system consistency check
Before a new component lands, Cassiopeia compares it against your existing patterns and flags drift — identical buttons that diverged, spacing that breaks the grid, copy that contradicts the voice guide.
- 04
Hand-off to Sirius
Cassiopeia's output is structured for engineering agents to consume directly — Sirius can implement the spec without a translation step.
Capabilities
- Every interaction state covered: default, hover, focus, disabled, loading, error, empty
- Copy decided per state — no "TBD" placeholders for engineers to fill in
- Spacing and layout rules grounded in your existing design system
- Edge-case coverage: network failure, optimistic updates, race conditions, mid-flow abort
- Design-system drift detection — flags inconsistencies before they ship
- Output format Sirius and other engineering agents can consume directly
Who it's for
What's included
- Complete interaction specs covering every state
- Per-state copy decisions, not placeholders
- Edge case and failure mode coverage
- Design-system consistency checks
- Engineering-ready output format
- 3-day free trial · No credit card required
Details
- Setup
- < 5 minutes
- Response
- Async — spec ready in minutes
- Integrations
- Knowledge Graph · Engineering agents
- Trial
- 3 days
