Concepts
How extensions plug into Backfill — glossary, standard library, script types, events, and runtime.
- Standard library
The named exports from @backfill-io/sdk that every script imports.
- Script types
Learn about hooks, jobs, API routes, entities, fields, pages and the file/folder rules the platform uses to find them.
- Events
System hook events, what triggers them, and what your handler is expected to return.
- Sandbox & runtime
Learn how extension code executes including what's allowed, what's stripped, and what's enforced by the sandbox.
- Glossary
Shared SDK terms for entities, records, documents, lines, and resources.