archify_sequence

archify_sequence diagram (uml-mcp plugin archify)

diagram_type: archify_sequence
Backend: plugin:archify (bundled with uml-mcp, on by default)
Output formats: html, svg

Sequence diagram: participants across the top, lifelines and ordered call and reply messages; dark, light or auto. JSON participants and messages; html or svg

Load the workflow skill uml-mcp-diagrams and the focused guide skill://uml-mcp-guides/archify/SKILL.md. This file is notation only; it does not add an MCP tool.

Example prompt

Sequence diagram of a cache-miss request through web, API, auth, Redis and Postgres.

Notation tips

• participants (id, name, role, icon, tone) and ordered messages (from, to, label, style, note).
• style: "dashed" marks a reply; a message to the same participant draws a loop; autonumber: true numbers them.

Styling

Pass theme (auto, dark or light) to generate_uml / generate_uml_image, or set it in the source. auto follows the reader's system in the HTML page and is dark in static SVG and PNG.

Example source

{"title":"Cache miss request sequence","subtitle":"A dashboard request that misses the cache and falls through to Postgres","theme":"auto","preset":"classic","participants":[{"id":"web","name":"Web App","role":"React UI","icon":"browser","tone":"blue"},{"id":"api","name":"API","role":"request handler","icon":"api","tone":"green"},{"id":"auth","name":"Auth","role":"JWT verify","icon":"shield","tone":"red"},{"id":"cache","name":"Redis","role":"cache","icon":"cache","tone":"orange"},{"id":"db","name":"Postgres","role":"source of truth","icon":"database","tone":"purple"}],"messages":[{"from":"web","to":"api","label":"GET /dashboard"},{"from":"api","to":"auth","label":"verify JWT"},{"from":"auth","to":"api","label":"claims ok","style":"dashed"},{"from":"api","to":"cache","label":"read cache"},{"from":"cache","to":"api","label":"miss","style":"dashed"},{"from":"api","to":"db","label":"SELECT widgets","note":"indexed by account"},{"from":"db","to":"api","label":"rows","style":"dashed"},{"from":"api","to":"cache","label":"set cache","tone":"orange"},{"from":"api","to":"api","label":"emit trace"},{"from":"api","to":"web","label":"200 OK","style":"dashed"}]}