Audited the checked-out pr-192 branch against local mermaid@11.16.0 and the vendored official pages for FLOWCHART, STATE, and SEQUENCE. plan.md and progress.md were requested but are absent in this checkout. The PR diff is Sankey-focused; the findings below are pre-existing family-contract gaps exposed by auditing the PR's overall claimed capability state, not regressions introduced in its changed source files.
- Syntax:
sequenceDiagram
A-|/B: bottom half arrow