# PART 2: Existing subsystems to reuse instead of building be… (1)

Checks 1 to 4 of 8, each with its evidence

## What you can do here

- **Verify 1: Mermaid: MIT licence; highest tag mermaid@1…**: Verify: Mermaid: MIT licence; highest tag mermaid@12.2.0; last commit 2026-10…
- **Verify 2: Customer journeys (human, organisation or a…**: Verify: Customer journeys (human, organisation or agent) | User Journey (jour…
- **Verify 3: Journeys across many actors (person, agent,…**: Verify: Journeys across many actors (person, agent, EDGE, bank) | Flowchart (…
- **Verify 4: API endpoint interactions | Sequence Diagra…**: Verify: API endpoint interactions | Sequence Diagram (sequenceDiagram) | Stab…
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- **Open Meet the research: 2.9 Journey and diagr**