Ensure every rendering/utility path uses the correct configuration namespace and that config values are passed explicitly (not implicitly via global getters or captured/stale variables).

Practical rules:

• Match config paths end-to-end: if tests set config.flowchart.htmlLabels, the code that affects label sizing must read the same path (and the same key name).
• Don’t pull config inside internal helpers: prefer passing config/needed flags as parameters so helpers are deterministic and easy to test.
• Avoid caching/stale config snapshots: don’t compute const conf = getConfig().<section> once if it can be initialized later; fetch/use config at the correct lifecycle or keep the prior approach.
• Use diagram-specific defaults: when computing defaults for a diagram/module, read from its own config section (e.g., block defaults from config.block, not config.flowchart).

Example pattern (config injection):

// Bad: internal utility reaches out to global config
import { getConfig } from '../config.js';
function preprocessMarkdown(markdown: string) {
  const markdownAutoWrap = getConfig().markdownAutoWrap;
  // ...
}

// Good: pass only what you need
function preprocessMarkdown(markdown: string, markdownAutoWrap: boolean) {
  // ...
}

// Call site
const { markdownAutoWrap } = getConfig();
preprocessMarkdown(markdown, markdownAutoWrap);