# Catalogue

> Public catalogue components.

JSON: https://staging.leyline.ahensya.com/api/v1/components

- [PageIndex](https://staging.leyline.ahensya.com/components/pageindex.md): PageIndex (MIT, Python) is VectifyAI’s vectorless, reasoning-based RAG engine. First-party pitch: build a hierarchical tree index per document, then let an LLM reason through that tree (human-like section navigation) instead of embedding chunks into a vector database.
- [telemetry.dev](https://staging.leyline.ahensya.com/components/telemetry-dev.md): Hosted observability for AI/LLM apps. Product line: every model call, tool step, and retrieval in one OpenTelemetry trace, with tokens, cost, latency, and errors. Ingest via TypeScript or Python SDKs, or any OTLP exporter. Cost is computed server-side against 4700+ models.
- [Slack Enterprise Search](https://staging.leyline.ahensya.com/components/slack-enterprise-search.md): Slack feature that searches conversations, files, connected third-party apps, and custom or self-hosted sources from one Slack search bar. It uses real-time federated retrieval, permission-aware results, and natural-language answers with conversational summaries. Slackbot is desc