# WP-04 — Relation explorer & knowledge journeys

**Purpose:** Make interconnected knowledge truly explorable.

**Dependencies:** see `INDEX.md`. **Status:** planned. **Owner:** to assign. **Estimate:** to refine after WP-00.

## Work packages

- [ ] Implement typed outgoing/incoming relation blocks and inverse labels.
- [ ] Build bounded interactive 1-2 hop graph and adjacency export.
- [ ] Add collections, related objects, reading path breadcrumbs.
- [ ] Introduce optional glossary tooltips and link previews.
- [ ] Handle cycles, multigraph, multi-parent hierarchy and disconnected components.

## Acceptance gates

- [ ] No graph relation omitted silently.
- [ ] Graph focus and detail navigation are reversible and deep linkable.
- [ ] Large graph safeguards tested with synthetic fixture.

## Key risk / mitigation focus

R6: large graph performance. Log evidence and deviations in the workplan review before marking complete.

## Evidence artifacts

Pull requests, test logs, pinned artifacts, screenshots or comparison report where applicable. Add explicit `ImplementationNotes.md` and `Review.md` on completion; do not mark a gate passed without a verifiable link.