# Architecture principles whose scope is index

> 2 records

This index as JSON: https://banes-lab.com/json/api/facets/architecture/scope/index

## Entries

- [Two-Direction Index](https://banes-lab.com/records/architecture/two-direction-index.md): A mechanism that generates an index from the directory on every run and checks it both ways, reporting an entry with no file and a file with no entry, with every scan independent of depth.
- [Hand-Kept Index](https://banes-lab.com/records/architecture/hand-kept-index.md): A defect in which an index is written by hand beside what it indexes, so it drifts silently because nothing compares the two.