Final corpus-graph PR. Connects the graph to the chair's workflow and rounds
out the Obsidian-grade interactions.
Backend (web/graph_api.py): neighborhood depth cap 2 → 3 (still bounded by
NODE_CAP_MAX).
Frontend:
- URL deep-link: /graph?focus=cl:<id> is read on mount and written on focus
change (router.replace, scroll:false). GraphView wrapped in <Suspense> per
Next 16's useSearchParams requirement.
- "הצג בגרף" button on the precedent detail page → /graph?focus=cl:<id>.
- Depth slider (1–3) in the focused overlay → useNodeNeighborhood(id, depth).
- Export PNG: grabs the rendered <canvas> from the area ref → toDataURL →
download; failures surface a toast (UI4).
- Rich node panel: precedent nodes fetch headnote/summary via the existing
usePrecedent hook (Skeleton while pending, error surfaced — UI4).
- Edge-type legend (ציטוט / נושא-תחום / יומון) added under the node legend.
Deferred (noted for a later pass): expand-in-place merge, search→camera-center.
web-ui build + lint pass. Invariants: G2 (depth change is read-only), UI4
(PNG + detail errors surfaced, not swallowed). api:types post-deploy.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Native, Obsidian-graph-view-like network of the precedent corpus, rendered
in web-ui from a read-only projection of the live DB. Replaces the idea of
exporting to an external Obsidian vault (which would be a parallel, drifting
copy of the corpus — the exact root cause G2 forbids).
The graph edges already existed in the data model; this only surfaces them:
nodes = precedents (case_law) + synthesized topic/practice-area hubs;
edges = cites (precedent_internal_citations) + same_chain (case_law_relations)
+ tagged/in_area (subject_tags / practice_area membership). Node size =
incoming-citation count (index-backed GROUP BY on idx_pic_target). Click a
node → local-graph neighborhood focus; panel deep-links to /precedents/[id].
Backend (read-only, SELECT only — G2):
- web/graph_api.py — Pydantic models (CorpusGraph/GraphNode/GraphEdge, so
OpenAPI emits real types — UI2) + SQL assembly over the shared db.get_pool().
- web/app.py — GET /api/graph/corpus, GET /api/graph/node/{id}/neighborhood,
both with explicit response_model. practice_area validated against the
closed enum (G5); both endpoints write nothing.
Frontend:
- react-force-graph-2d (canvas/d3-force), loaded via next/dynamic ssr:false.
- /graph page + nav entry; graph.ts TanStack hooks; filter panel (practice_area
/ source / min-citations / search / node-type toggles), node detail panel,
hover+selection neighborhood highlight. Explicit error handling (UI4).
Not a retrieval path (03-retrieval): returns graph topology, never ranked
search results. Halacha nodes + corroboration/equivalence edges are Phase 2,
already gated behind the node_types param (no contract change needed).
SQL validated read-only against the live DB (142 precedents, 85 resolved
citations, JSONB tag expansion, ANY(uuid[]) edge + BFS queries). web-ui lint
+ build pass; /graph in the route table.
Invariants: keeps G2 (single source of truth — live projection, no parallel
store), G5 (corpus separation filtered server-side), UI2 (response models),
UI4 (no swallowed UI errors).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
