Graph: national county↔district↔legislator authority layer

The first edges in the repo. Every US county now links to the districts it
sits in, weighted by area overlap, and every legislator links to the district
they represent — county → district → representative, traversable.

Data (PostGIS, no Atlas dependency — computed directly from geometry):
- data/county_district_edges.jsonl — 16,328 weighted edges. area_weight =
  ST_Area(ST_Intersection(county, district))/ST_Area(county) over ST_MakeValid
  Census TIGER 2024 geometries, overlaps <0.5% dropped. Uses area-intersection,
  NOT centroid-in-polygon, so urban districts that carve through counties
  (e.g. GA CD-5 / Atlanta across Clayton+DeKalb+Fulton) are captured, not
  silently dropped. Per-county weights sum to ~1.0 per district type.

build.py:
- ~6,896 new district nodes: 435 CD (ACS demographics where available; sparse
  for the 8 states missing from acs_cd) + 4,927 state-house + 1,897 state-senate
  (geometry-only). GEOID/number-keyed, stable.
- county index.md gains a `districts:` block (frontmatter) + a ## Districts
  section (body links, so link-integrity checks them).
- legislators + US House members gain `represents:` pointing at their district
  node; edge stored once on the person, inverse left to the view.
- schemas/jurisdiction: classification enum + chamber/districts fields.

Honest gaps (logged, not hidden): ID + NH have no state-house geometry, so
their house districts get nodes (represents resolves) but no county edges;
CD nodes for acs_cd-missing states are demographically sparse.

Deterministic (byte-identical rebuild); validate.py passes 26,617 records,
link-integrity clean (every district/represents link resolves).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

data/jurisdictions/us/states/il/counties/will/index.md

@@ -22,9 +22,84 @@ demographics:
   race_native: 3817
   hispanic: 138703
   bachelors_plus: 247524
+districts:
+  - to: "us/states/il/districts/01"
+    rel: in-district
+    area_weight: 0.512
+  - to: "us/states/il/districts/14"
+    rel: in-district
+    area_weight: 0.2508
+  - to: "us/states/il/districts/02"
+    rel: in-district
+    area_weight: 0.1998
+  - to: "us/states/il/districts/11"
+    rel: in-district
+    area_weight: 0.0374
+  - to: "us/states/il/districts/senate/40"
+    rel: in-district
+    area_weight: 0.3748
+  - to: "us/states/il/districts/senate/43"
+    rel: in-district
+    area_weight: 0.2434
+  - to: "us/states/il/districts/senate/15"
+    rel: in-district
+    area_weight: 0.1193
+  - to: "us/states/il/districts/senate/19"
+    rel: in-district
+    area_weight: 0.1042
+  - to: "us/states/il/districts/senate/49"
+    rel: in-district
+    area_weight: 0.0996
+  - to: "us/states/il/districts/senate/17"
+    rel: in-district
+    area_weight: 0.0349
+  - to: "us/states/il/districts/senate/21"
+    rel: in-district
+    area_weight: 0.0122
+  - to: "us/states/il/districts/senate/42"
+    rel: in-district
+    area_weight: 0.0067
+  - to: "us/states/il/districts/house/80"
+    rel: in-district
+    area_weight: 0.2306
+  - to: "us/states/il/districts/house/86"
+    rel: in-district
+    area_weight: 0.1771
+  - to: "us/states/il/districts/house/79"
+    rel: in-district
+    area_weight: 0.1442
+  - to: "us/states/il/districts/house/29"
+    rel: in-district
+    area_weight: 0.1193
+  - to: "us/states/il/districts/house/37"
+    rel: in-district
+    area_weight: 0.0801
+  - to: "us/states/il/districts/house/85"
+    rel: in-district
+    area_weight: 0.0663
+  - to: "us/states/il/districts/house/97"
+    rel: in-district
+    area_weight: 0.0542
+  - to: "us/states/il/districts/house/98"
+    rel: in-district
+    area_weight: 0.0454
+  - to: "us/states/il/districts/house/34"
+    rel: in-district
+    area_weight: 0.0349
+  - to: "us/states/il/districts/house/38"
+    rel: in-district
+    area_weight: 0.0241
+  - to: "us/states/il/districts/house/41"
+    rel: in-district
+    area_weight: 0.0122
+  - to: "us/states/il/districts/house/84"
+    rel: in-district
+    area_weight: 0.0067
 sources:
   - field: demographics
-    source: Census ACS 2023
+    source: "Census ACS 2023"
+  - field: districts
+    source: "PostGIS area-intersection over Census TIGER 2024 boundaries"
 confidence: official
 tags: [jurisdiction, county, il]
 timestamp: "2026-07-03"
@@ -56,6 +131,34 @@ County jurisdiction — 1 officeholders mapped.
 | Hispanic/Latino | 138703 |
 | Bachelor's or higher | 247524 |
 
+## Districts
+
+- [IL-01](/us/states/il/districts/01.md) — 51% (congressional)
+- [IL-14](/us/states/il/districts/14.md) — 25% (congressional)
+- [IL-02](/us/states/il/districts/02.md) — 20% (congressional)
+- [IL-11](/us/states/il/districts/11.md) — 4% (congressional)
+- [IL Senate District 40](/us/states/il/districts/senate/40.md) — 37% (state senate)
+- [IL Senate District 43](/us/states/il/districts/senate/43.md) — 24% (state senate)
+- [IL Senate District 15](/us/states/il/districts/senate/15.md) — 12% (state senate)
+- [IL Senate District 19](/us/states/il/districts/senate/19.md) — 10% (state senate)
+- [IL Senate District 49](/us/states/il/districts/senate/49.md) — 10% (state senate)
+- [IL Senate District 17](/us/states/il/districts/senate/17.md) — 3% (state senate)
+- [IL Senate District 21](/us/states/il/districts/senate/21.md) — 1% (state senate)
+- [IL Senate District 42](/us/states/il/districts/senate/42.md) — 1% (state senate)
+- [IL House District 80](/us/states/il/districts/house/80.md) — 23% (state house)
+- [IL House District 86](/us/states/il/districts/house/86.md) — 18% (state house)
+- [IL House District 79](/us/states/il/districts/house/79.md) — 14% (state house)
+- [IL House District 29](/us/states/il/districts/house/29.md) — 12% (state house)
+- [IL House District 37](/us/states/il/districts/house/37.md) — 8% (state house)
+- [IL House District 85](/us/states/il/districts/house/85.md) — 7% (state house)
+- [IL House District 97](/us/states/il/districts/house/97.md) — 5% (state house)
+- [IL House District 98](/us/states/il/districts/house/98.md) — 5% (state house)
+- [IL House District 34](/us/states/il/districts/house/34.md) — 3% (state house)
+- [IL House District 38](/us/states/il/districts/house/38.md) — 2% (state house)
+- [IL House District 41](/us/states/il/districts/house/41.md) — 1% (state house)
+- [IL House District 84](/us/states/il/districts/house/84.md) — 1% (state house)
+
 ## Source
 
 - demographics: Census ACS 2023
+- districts: PostGIS area-intersection over Census TIGER 2024 boundaries