---
title: Development notes
description: Navigation system — How navigation trees are built, re-homed, and assembled across repositories.Elasticsearch ingest — The lexical and semantic indexing...
url: https://docs-v3-preview.elastic.dev/elastic/docs-builder/pull/3805/development
products:
  - Elastic Docs Builder
---

# Development notes
<warning>
  These are old development notes created during the initial development of docs-builder. They are likely to be deleted or substantially rewritten. Do not rely on them as authoritative documentation.
</warning>

- **[Navigation system](https://docs-v3-preview.elastic.dev/elastic/docs-builder/pull/3805/development/navigation)** — How navigation trees are built, re-homed, and assembled across repositories.
- **[Elasticsearch ingest](https://docs-v3-preview.elastic.dev/elastic/docs-builder/pull/3805/development/ingest)** — The lexical and semantic indexing pipeline with hash-based change detection.
- **[essc](https://docs-v3-preview.elastic.dev/elastic/docs-builder/pull/3805/development/essc)** — The AOT-compiled CLI for indexing elastic.co content (Contentstack, Labs) into Elasticsearch.
- **[Changelog bundle registry](https://docs-v3-preview.elastic.dev/elastic/docs-builder/pull/3805/development/changelog-bundle-registry)** — CDN-based changelog bundle publishing, scrubbing, and the `{changelog}` directive's `cdn:` mode.