DFD — <system (Level 0) or feature (Level 1/2)>

• Status: Draft
• Last updated: YYYY-MM-DD
• Related ADRs: ADR-NNNN

Snapshot of the system as it stands today. Edit in place; never record what changed. Conventions: content/docs/maintain/dfd/index.mdx. Levels balance — a child's flows match its parent's.

ScopeCopy Anchor Link

Which process this decomposes, and its parent diagram.

DiagramCopy Anchor Link

Draw this diagram with Archify too. In a copy, wrap the fence in <Diagram src="/diagrams/<project-slug>/<slug>.html" title="…"> … </Diagram>, with nothing else inside: the page shows the Archify view and its Markdown the Mermaid. Outside the templates, a bare Mermaid fence fails the build (ADR-0022).

flowchart LR
  Ext["External Entity"]

  subgraph Trust["Trust boundary — the site"]
    P1(("1.0<br/>Process name"))
    D1[("D1 · Data store")]
  end

  Ext -->|"data that moves"| P1
  P1 -->|"record written"| D1
  D1 -->|"record read"| P1
  P1 -->|"result returned"| Ext

External entitiesCopy Anchor Link

ProcessesCopy Anchor Link

Data storesCopy Anchor Link

Trust boundary crossingsCopy Anchor Link

Every flow that crosses a boundary, with how it is authorised and whether private content can travel on it.