Interaction Design

Trigger Boundary

• •Use when user flow behavior, transitions, or state logic is unclear.
• •Do not use for high-level navigation hierarchy; use information-architecture.
• •Do not use for aesthetic styling decisions only; use visual-design.

Goal

Define predictable and accessible interaction behavior across core flows.

Shared Design Contract (Canonical)

• •Use ../design-principles/references/design-governance-contract.md as the single schema and gate source.
• •Assign flow IDs as UX-FLW-*.
• •Run machine validation: python3 ../design-principles/scripts/validate_design_contract.py --manifest <path/to/manifest.json>.

Inputs

• •User tasks and business-critical journeys
• •Existing flow issues and support signals
• •Platform interaction constraints

Outputs

• •Flow specifications with UX-FLW-* IDs
• •State transition and feedback behavior map
• •Edge-case and failure-state definitions

Workflow

1. •Define start/end conditions for each key flow.
2. •Map primary, alternative, and failure paths.
3. •Specify state transitions and user feedback timing.
4. •Add explicit empty, loading, and error states.
5. •Validate keyboard and assistive-technology operability.

Quality Gates

• •Critical flows have explicit state models.
• •Failure states are defined and user-actionable.
• •Interaction behavior is consistent across similar patterns.
• •Accessibility gates pass for keyboard and focus behavior.

Failure Handling

• •Stop when flow goals or state boundaries are ambiguous.
• •Escalate when critical error states are undefined.