# Phase 5 Context: Ontology and Learning Materials

**Status:** Ready for execution
**Started:** 2026-04-26

## Goal

Accept learning material input and produce source-backed ontology candidates.

## Inputs

- OpenSpec `learning-ontology` requirements.
- Existing workflow contracts for `OntologyGap`.
- Backend Developer Interview seed concepts.

## Decisions

- Use an in-memory ontology store for MVP proof.
- Accept JSON material ingestion before multipart file upload.
- Mark all generated nodes, edges, and gaps as `candidate`.
- Preserve source evidence for every supported ontology candidate.

## Boundaries

In scope:

- Material ingestion API.
- Source-backed ontology candidate nodes and edges.
- Gap detection for missing prerequisites and weak evidence.
- Ontology snapshot API.

Out of scope:

- File storage.
- PDF/PPT parsing.
- Human review UI.
- Canonical promotion workflow.