Close the institutional gap: bodies, committees, leadership

The seat data answered 'who represents this place?' but not 'who runs
this institution?' — the Speaker of the House existed only as the rep
for LA-4. This adds the missing axis of institutional power.

New Body entities (233): the U.S. House, U.S. Senate, Executive Office,
49 committees, 181 subcommittees — each with its leadership.

Federal people (532/542) enriched with bioguide IDs, leadership roles,
and committee seats, reconciled from congress-legislators by name.
Mike Johnson is now Speaker of the House, not just LA-4.

Sources ingested directly into the repo (repo-canonical): Atlas
supplied bodies/leadership/committee_memberships via congress-legislators,
committed raw in data/. build.py supersedes convert_officeholders.py and
reads all four inputs in one deterministic pass (byte-identical on rerun).

The 10 unenriched federal records are a finding, not a bug: vacancies,
the President, and ~5 seats where Atlas's roster disagrees with the
authoritative current roster — model-vs-reality discrepancies to surface.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

data/jurisdictions/us/people/mark-b-messmer.md

@@ -8,6 +8,37 @@ level: "federal"
 branch: "legislative"
 state: "IN"
 district: "Congressional District 8"
+committees:
+  - name: "House Committee on Agriculture"
+    role: "member"
+    body: "us/bodies/house/committees/agriculture"
+  - name: "House Committee on Agriculture - Commodity Markets, Digital Assets, and Rural Development"
+    role: "member"
+    body: "us/bodies/house/committees/agriculture/subcommittees/commodity-markets-digital-assets-and-rural-development"
+  - name: "House Committee on Agriculture - Conservation, Research, and Biotechnology"
+    role: "member"
+    body: "us/bodies/house/committees/agriculture/subcommittees/conservation-research-and-biotechnology"
+  - name: "House Committee on Agriculture - Livestock, Dairy, and Poultry"
+    role: "member"
+    body: "us/bodies/house/committees/agriculture/subcommittees/livestock-dairy-and-poultry"
+  - name: "House Committee on Armed Services"
+    role: "member"
+    body: "us/bodies/house/committees/armed-services"
+  - name: "House Committee on Armed Services - Readiness"
+    role: "member"
+    body: "us/bodies/house/committees/armed-services/subcommittees/readiness"
+  - name: "House Committee on Armed Services - Strategic Forces"
+    role: "member"
+    body: "us/bodies/house/committees/armed-services/subcommittees/strategic-forces"
+  - name: "House Committee on Education and Workforce"
+    role: "member"
+    body: "us/bodies/house/committees/education-and-workforce"
+  - name: "House Committee on Education and Workforce - Early Childhood, Elementary, and Secondary Education"
+    role: "member"
+    body: "us/bodies/house/committees/education-and-workforce/subcommittees/early-childhood-elementary-and-secondary-education"
+  - name: "House Committee on Education and Workforce - Workforce Protections"
+    role: "member"
+    body: "us/bodies/house/committees/education-and-workforce/subcommittees/workforce-protections"
 tenure:
   start: "2025-01-03"
   current: true
@@ -20,11 +51,14 @@ ids:
   office: "88dcb2bf-3e53-45d7-afc9-6fed880c32d1"
   tenure: "6162c786-ccb0-46d6-b261-fbf204e8623c"
   jurisdiction: "cde9d80f-073c-4936-a8d1-445f00b7080b"
+  bioguide: "M001233"
 sources:
   - field: tenure
     source: "House Clerk XML 2026-06-10"
   - field: jurisdiction
     source: "Census 119th CD 500k"
+  - field: roles
+    source: "congress-legislators (unitedstates project)"
 confidence: official
 tags: [officeholder, federal, legislative, in]
 timestamp: "2026-06-20"
@@ -34,9 +68,23 @@ timestamp: "2026-06-20"
 
 Current U.S. House of Representatives - IN-8 (Congressional District 8).
 
+## Committees
+
+- [House Committee on Agriculture](/us/bodies/house/committees/agriculture.md)
+- [House Committee on Agriculture - Commodity Markets, Digital Assets, and Rural Development](/us/bodies/house/committees/agriculture/subcommittees/commodity-markets-digital-assets-and-rural-development.md)
+- [House Committee on Agriculture - Conservation, Research, and Biotechnology](/us/bodies/house/committees/agriculture/subcommittees/conservation-research-and-biotechnology.md)
+- [House Committee on Agriculture - Livestock, Dairy, and Poultry](/us/bodies/house/committees/agriculture/subcommittees/livestock-dairy-and-poultry.md)
+- [House Committee on Armed Services](/us/bodies/house/committees/armed-services.md)
+- [House Committee on Armed Services - Readiness](/us/bodies/house/committees/armed-services/subcommittees/readiness.md)
+- [House Committee on Armed Services - Strategic Forces](/us/bodies/house/committees/armed-services/subcommittees/strategic-forces.md)
+- [House Committee on Education and Workforce](/us/bodies/house/committees/education-and-workforce.md)
+- [House Committee on Education and Workforce - Early Childhood, Elementary, and Secondary Education](/us/bodies/house/committees/education-and-workforce/subcommittees/early-childhood-elementary-and-secondary-education.md)
+- [House Committee on Education and Workforce - Workforce Protections](/us/bodies/house/committees/education-and-workforce/subcommittees/workforce-protections.md)
+
 ## Sources
 
 - tenure: House Clerk XML 2026-06-10
 - jurisdiction: Census 119th CD 500k
+- roles: congress-legislators (unitedstates project)
 
 Generated from the Atlas officeholders v2 export (2026-06-20).