EventModeler

A purpose-built collaborative canvas for designing information systems using Event Modeling.

Event Model in → Event Model → Refined Event Model out.

Documentation

• Product Specification — Feature set, Event Model format, user stories, competitive landscape
• Technical Design — Architecture, data model, canvas, collaboration, workshop enforcement, scenario generation, completeness checking, wireframe handling
• Event Model Format Specification — Standalone format spec for Event Model files (frontmatter, sections, emlang notation, event stream)

Development Setup

Prerequisites (install via mise):

mise install        # Erlang, Elixir, Node
mix deps.get        # Elixir dependencies
mix phx.server      # Start dev server at localhost:4000

Done

• Event Model Format Spec + Template — Standalone format specification and reusable template with emlang notation, event stream format, and validation rules
• Event Model Parser — Parses Event Model markdown into structured data: YAML frontmatter, emlang slice blocks, named sections, and event stream entries
• Read-Only Visualization — SVG canvas rendering at /visualize with element layout, swimlane rows, connection arrows, and color-coded element types
• File Management + Board Model — Workspace file operations, Event Model serializer for round-trip markdown, Board GenServer per open file with DynamicSupervisor + Registry
• Interactive Canvas Editing — Place, move, connect, edit, and delete elements on the canvas with JS hook for pan/zoom/drag, connection rule validation, and event stream audit log
• Slices + Scenario Generation — Define named slices from element groups, auto-generate Given/When/Then scenarios from slice element graphs, sidebar UI for slice management
• Full Event Model Round-Trip — Save updates frontmatter timestamps and status, auto-generates data flows table, export controller for file download, verified with integration tests

TODO

• Real-Time Collaboration — Multiple users editing the same board simultaneously with cursor tracking, element locking, and Phoenix Presence
• Workshop Mode — Guided 7-step Event Modeling workshop with per-step element constraints and facilitator controls
• Completeness Checking + Polish — Field traceability (View → Event → Command), read-only sharing route, landing page navigation, dogfooding readiness

License

MIT — see LICENSE.