Sequences
Building a canvas
How to build a visual editor on the definition: the schema endpoints, layout, and the Harpoon canvas as the example.
This page is not written yet. The building blocks exist:
GET /v1/schema (the JSON Schema plus the node and channel catalogue with params and transitions), GET /v1/schema/fields (the condition picker), GET /v1/schema/events, POST /v1/sequences:validate (problems with JSON paths while the user edits), the draft's lock_version, and the journey to highlight a contact's path. No layout is stored in the definition; compute positions with a tidy-tree layout from entry and next.