Authority axis v1: mint the executive branch + link 27,804 § → office edges

The Code empowers the executive branch, but the mirror only had legislative
Bodies — every authority reference pointed at nothing. Fixed by minting the
executive branch from the Code's OWN enumerations: 15 Cabinet departments
(5 U.S.C. § 101) + 21 Executive-Schedule Level I offices (§ 5312), 42 Body
nodes under us/executive/.

Then the axis: scripts/extract_authority.py matches named office/department
references across all 59,740 sections (guarding against Deputy/Assistant/Under
subordinates) and emits data/section_authority_edges.jsonl — 27,804 edges from
17,031 sections (28.7% of the Code) to the offices they empower. build.py
renders reciprocal 'empowered by' links on each office node; the section files
are never touched. Now: click the Attorney General, see all 2,386 sections that
vest authority in it.

Named references only in v1 (cabinet-level). Deterministic; body.schema
classification enum extended (executive-department/-agency/-office); make check
green at 105,746 records.

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

data/jurisdictions/us/executive/federal-reserve/chairman.md

@@ -0,0 +1,25 @@
+---
+type: Body
+title: "Chairman of the Board of Governors of the Federal Reserve System"
+classification: "executive-office"
+chamber: "executive"
+code: "EXEC-FEDERAL-RESERVE-CHAIRMAN"
+parent: "us/executive/federal-reserve"
+schedule_level: "I"
+sources:
+  - field: definition
+    source: "5 U.S.C. § 5312 (Executive Schedule, Level I)"
+confidence: official
+tags: [body, executive, executive-office]
+timestamp: "2026-07-03"
+---
+
+# Chairman of the Board of Governors of the Federal Reserve System
+
+Cabinet-rank office (Executive Schedule Level I, 5 U.S.C. § 5312), head of the [Board of Governors of the Federal Reserve System](/us/executive/federal-reserve/index.md).
+
+## Empowered by the U.S. Code
+
+1 sections of the U.S. Code vest authority in this office.
+
+- [5 U.S.C. § 5312](/legal/us/code/title-05/chapter-53/section-5312.md)

data/jurisdictions/us/executive/federal-reserve/index.md

@@ -0,0 +1,49 @@
+---
+type: Body
+title: "Board of Governors of the Federal Reserve System"
+classification: "executive-agency"
+chamber: "executive"
+code: "EXEC-FEDERAL-RESERVE"
+head: "us/executive/federal-reserve/chairman"
+sources:
+  - field: definition
+    source: "5 U.S.C. § 5312 (Executive Schedule, Level I)"
+confidence: official
+tags: [body, executive, executive-agency]
+timestamp: "2026-07-03"
+---
+
+# Board of Governors of the Federal Reserve System
+
+Executive agency. Its head, the [Chairman of the Board of Governors of the Federal Reserve System](/us/executive/federal-reserve/chairman.md), is a Level I position in the Executive Schedule (5 U.S.C. § 5312).
+
+## Referenced by the U.S. Code
+
+304 sections of the U.S. Code reference this agency. A sample:
+
+- [5 U.S.C. § 415](/legal/us/code/title-05/chapter-4/section-415.md)
+- [5 U.S.C. § 5312](/legal/us/code/title-05/chapter-53/section-5312.md)
+- [5 U.S.C. § 5313](/legal/us/code/title-05/chapter-53/section-5313.md)
+- [5 U.S.C. § 807](/legal/us/code/title-05/chapter-8/section-807.md)
+- [5 U.S.C. § 8402](/legal/us/code/title-05/chapter-84/section-8402.md)
+- [5 U.S.C. § 8411](/legal/us/code/title-05/chapter-84/section-8411.md)
+- [7 U.S.C. § 1a](/legal/us/code/title-07/chapter-1/section-1a.md)
+- [7 U.S.C. § 2](/legal/us/code/title-07/chapter-1/section-2.md)
+- [7 U.S.C. § 2016](/legal/us/code/title-07/chapter-51/section-2016.md)
+- [7 U.S.C. § 27d](/legal/us/code/title-07/chapter-1/section-27d.md)
+- [10 U.S.C. § 987](/legal/us/code/title-10/chapter-49/section-987.md)
+- [11 U.S.C. § 109](/legal/us/code/title-11/chapter-1/section-109.md)
+- [11 U.S.C. § 781](/legal/us/code/title-11/chapter-7/section-781.md)
+- [12 U.S.C. § 122a](/legal/us/code/title-12/chapter-2/section-122a.md)
+- [12 U.S.C. § 144](/legal/us/code/title-12/chapter-2/section-144.md)
+- [12 U.S.C. § 1462](/legal/us/code/title-12/chapter-12/section-1462.md)
+- [12 U.S.C. § 1701p–1](/legal/us/code/title-12/chapter-13/section-1701p-1.md)
+- [12 U.S.C. § 1708](/legal/us/code/title-12/chapter-13/section-1708.md)
+- [12 U.S.C. § 1715z–20](/legal/us/code/title-12/chapter-13/section-1715z-20.md)
+- [12 U.S.C. § 1715z–23](/legal/us/code/title-12/chapter-13/section-1715z-23.md)
+- [12 U.S.C. § 1783](/legal/us/code/title-12/chapter-14/section-1783.md)
+- [12 U.S.C. § 1795j](/legal/us/code/title-12/chapter-14/section-1795j.md)
+- [12 U.S.C. § 1813](/legal/us/code/title-12/chapter-16/section-1813.md)
+- [12 U.S.C. § 1817](/legal/us/code/title-12/chapter-16/section-1817.md)
+- [12 U.S.C. § 1818](/legal/us/code/title-12/chapter-16/section-1818.md)
+- …and 279 more (full set in data/section_authority_edges.jsonl)