Individual skill
sequence-diagram
Diagram an interaction as a sequence of messages between participants over time. Use when asked to show an API flow, request/response, auth handshake, integration, or 'what calls what in what order'. Produces a ready-to-render Mermaid sequence diagram (renders live, exportable as PNG/SVG) plus notes on edge cases and failure paths.
plugins/pm-visuals/skills/sequence-diagram/SKILL.md
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- Last checked
- Nov 9, 2026
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- License
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SKILL.mdcore · 3,073 bytes
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# Sequence Diagram Skill
When the question is *"in what order do these things talk to each other?"*, a sequence diagram is the
clearest answer. This skill turns a described interaction — an API call chain, an auth handshake, a webhook
flow — into a correct **Mermaid sequence diagram** with participants, ordered messages, return values, and
the important error/timeout paths.
## Required Inputs
Ask for these only if they aren't already provided:
- **The participants** — the actors/services/systems involved (client, API, DB, third party…).
- **The messages** — what each one sends to the next, in order; what comes back.
- **Sync vs async** — which calls block on a response vs fire-and-forget.