ottyl/tickets/018-sequence-diagram.md

018 — Sequence diagram of events (future idea)

The README lists this under "Ideas... that can be implemented in the future, but not now." Not scoped for current implementation — tracked here so it isn't lost.

Summary

Let users declare sequence-diagram participants from params or matchers (e.g. node_id), then render a sequence diagram of captured events of interest. No relation between nodes is modeled — only event sequence/ordering determines the diagram.

Scope (sketch, not final)

• Participant declaration referencing an existing param (001), e.g. "one participant per distinct value of node_id".
• Event-of-interest selection, likely reusing FilterBar syntax (005) to define which log lines become diagram events.
• Rendering: a sequence-diagram view (e.g. mermaid sequenceDiagram) driven by ordered matching events per participant.

Depends on

• 001 — Param declarations
• 005 — FilterBar pest parser (likely, for event-matcher syntax reuse)