--- kb_schema_version: "1.2" --- # Knowledge Base Index > Routing table: read the **Use when** column to decide if a page is relevant. | Page | Description | Use when | |------|-------------|----------| | [Overview](overview.md) | High-level map of the knowledge base | Getting started, understanding the structure | | [Log](log.md) | Chronological record of root-level changes | Reviewing recent modifications | | [Error Book](error-book.md) | Known compilation errors and fixes | Debugging a bad ingest or lint issue | | [Projects](projects/index.md) | Optional local query scopes grouping related wiki pages, sources, libs, and graph areas | Narrowing search to a team, topic, client, system, or initiative | | [Query Gaps](query-gaps.md) | Questions the wiki could not answer yet, used to drive demand-driven ingest | Tracking failed searches, missing knowledge, future ingest targets | | [Entities](entities/index.md) | Typed entity pages (people, projects, libraries, concepts) | Looking up a specific person, project, library, or concept | | [Graph](graph/index.md) | Edge lists and relationship data between entities | Finding what depends on / relates to a given entity | ## Entity Pages Pages in `entities/` describe typed entities (people, projects, libraries, concepts) extracted during ingest. See [Entities index](entities/index.md) / [[entities/index]] for the full list. Each links to related entities via the graph index. *(Agent populates this as entities are extracted.)*