Driving critical-path coverage to 95% — and what it didn't catch

Introducing test-driven development to a team that shipped fine without it, and the bugs that walked straight past the suite anyway.

[ PLACEHOLDER — the real post goes here. The title and summary above are a starting point drawn from work you have actually shipped; rewrite or delete. ]

A heading

Body copy renders with the site’s type tokens: 18px, 1.7 line height, capped at about 68ch so a paragraph stays readable.

// Code blocks scroll horizontally rather than widening the page.
const resolvers = {
  Query: {
    employee: (_: unknown, { id }: { id: string }, ctx: Context) =>
      ctx.loaders.employee.load(id),
  },
};

Another paragraph, so the spacing between blocks stays visible while the design is still being checked.