# Feature Specification: Inventory Dependencies Graph

**Feature Branch**: `feat/042-inventory-dependencies-graph`  
**Created**: 2026-01-07  
**Status**: Draft  

## Purpose

Represent and surface dependency relationships between inventory items and foundational Intune objects so admins can understand blast radius and prerequisites.

## User Scenarios & Testing

### Scenario 1: View dependencies for an item
- Given an inventory item
- When the user opens its dependencies view
- Then they can see inbound and outbound relationships (e.g., “uses”, “assigned to”, “scoped by”)

### Scenario 2: Identify missing prerequisites
- Given an item references a prerequisite object not present in inventory
- When the user views dependencies
- Then missing prerequisites are clearly indicated

### Scenario 3: Filter dependencies by relationship type
- Given multiple relationship types exist
- When the user filters by relationship type
- Then only matching edges are shown

## Functional Requirements

- FR1: Define a normalized set of relationship types.
- FR2: Store dependency edges between inventory items and other objects (including non-inventory foundations when applicable).
- FR3: Allow querying inbound/outbound edges for a given item.
- FR4: Show missing prerequisites without requiring a separate “deleted” state in core inventory.
- FR5: All dependency data is tenant-scoped and access-controlled.

## Non-Functional Requirements

- NFR1: Dependency extraction must be idempotent (re-runnable without duplicating edges).
- NFR2: Dependency extraction must not fail an inventory sync run if an unknown/unsupported reference is encountered; it should record a safe warning.

## Success Criteria

- SC1: Admins can determine prerequisites and blast radius for an item in under 2 minutes.
- SC2: For supported relationship types, dependency edges are consistent across re-runs (deterministic output).

## Out of Scope

- Automatic remediation.
- Cross-tenant dependency graphs.

## Related Specs

- Program: `specs/039-inventory-program/spec.md`
- Core: `specs/040-inventory-core/spec.md`