Module index 

Top-level entry emission: index.js + index.d.ts that re-export every collection’s <name>.json.

Two .d.ts modes:

• Velite-style (config is .ts/.js/.mjs): re-import the user’s config, infer record types via typeof import(..)['collections'].
• Self-contained (TOML / no config): per-collection TS interface from schema = { ... }, else the generic DocRecord shape.

Functions

write_index

Pick the right .d.ts mode and write index.js + index.d.ts.