Reproduces #8488: Plugin relative paths fail with "Cannot read file" in monorepo setups.
When a child config extends a root config that has a relative plugin path, Biome fails to resolve the plugin.
├── biome.json # plugins: ["./biome/my-plugin.grit"]
├── biome/
│ └── my-plugin.grit
└── packages/
└── app/
├── biome.json # extends: ["../../biome.json"]
└── src/
└── index.ts
pnpm lintExpected: Plugin loads and warns about new Date() usage.
Actual:
Error(s) during loading of plugins:
Cannot read file.