Sequence (@seq)

Sequence diagrams show interactions between components over time.

@seq
[participants]
  client:Client
  api:API Server
  db:Database

[messages]
  client->api:POST /users
  api->db:INSERT user
  db-->api:user_id
  api-->client:201 Created

Rendered diagram

When to Use

• API request/response flows

• Authentication sequences

• Message passing between services

• User interaction flows

Key Concepts

Concept	Description	Example
Participants	Actors in the sequence	client:Client
Messages	Interactions over time	client->api:request
Returns	Response messages	api-->client:response

In This Section

• Participants - Defining actors

• Messages - Request and response patterns

• Control Flow - Loops and conditions

• Examples - Real-world sequences