Docs: the authority axis + executive layer

Body 233→275, total 105,746; the two axes now cross (law ↔ office).

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

docs/roadmap.md

@@ -5,12 +5,13 @@ An honest account of what exists, what's next, and what's further out. This repo
 ## Done
 
 - **The substrate** — repo-canonical, OKF markdown + YAML frontmatter, JSON-Schema validated, deterministic build (byte-identical on rerun).
-- **Five entity types, 105,704 files** — Person (13,329), Body (233), Candidate (2,494), Jurisdiction (29,908), LegalText (59,740).
+- **Five entity types, 105,746 files** — Person (13,329), Body (275), Candidate (2,494), Jurisdiction (29,908), LegalText (59,740).
 - **The federal government, structurally** — every member of Congress, the chambers, 49 committees and 181 subcommittees with their leadership, and every member's committee seats.
 - **The nationwide county skeleton** — all 3,131 U.S. counties as demographic nodes, plus all 435 congressional districts (Census ACS demographics on 363).
 - **The authority layer** — every state legislative district (4,927 house, 1,897 senate) linked county↔district↔legislator, nationwide.
 - **The municipal layer** — every incorporated place in the country (19,513 cities, towns, villages, boroughs) as a first-class Jurisdiction node keyed by Census place GEOID, modelled like a county (place + government fused). 2,229 are filled with their officeholders today (2,217 GEOID-resolved off a 98.8% name→GEOID join); the rest are truthful skeleton stubs — "governed, not yet mirrored" — waiting for depth, the same discipline as the county skeleton.
 - **The complete U.S. Code** — every section of all 53 populated titles (Title 53 is reserved), 59,740 per-section records, mirrored from the official OLRC USLM XML at release point 119-100, uniform edition end to end, with manifests and checksums.
+- **The authority axis (v1)** — the executive branch minted as nodes from the Code's own enumerations (15 Cabinet departments from 5 U.S.C. § 101, 21 Level I offices from § 5312), and **27,804 edges** linking 17,031 sections to the offices they empower. `scripts/extract_authority.py` → `data/section_authority_edges.jsonl` (a committed input, like the district edges); reciprocal "empowered by" links render on each office node. Named references only for now (cabinet-level); relative refs ("the Secretary") and the agency long tail are next.
 - **The 2026 federal candidate field** — every FEC filing as a Candidate.
 - **Florida to the ground** — officeholders down to the municipal level across all 67 counties.
 - **The pipeline** — `make build` / `validate` / `changelog` / `check`, standard-library only.
@@ -20,7 +21,8 @@ An honest account of what exists, what's next, and what's further out. This repo
 ## Next
 
 - **Self-updating mirror** — the `make check` GitHub Action now guards every push; next is the scheduled job that pulls a fresh Atlas export, rebuilds, and commits the changelog automatically. That is the point where the mirror maintains itself and the daily civic changelog becomes real (the first *re-sync* diff, where only genuine government changes surface).
-- **The Code as a living diff** — the whole Code is in; the next lever is re-syncing it at each new OLRC release point so amendments surface as diffs (a new public law becomes a visible change to the affected sections), and linking sections to the offices and bodies they empower (the authority axis).
+- **Deepen the authority axis** — v1 links cabinet-level *named* references. Next: resolve relative references ("the Secretary", "the Commission") via each title's definitions section; mint the agency long tail (~600 more offices the Code names — EPA, OPM, FCC, GAO…); attach current occupants (a Person for the sitting Secretary, from Atlas); and render the reverse edge on the section files themselves.
+- **The Code as a living diff** — re-sync the Code at each new OLRC release point so amendments surface as diffs: a new public law becomes a visible change to the affected sections.
 - **The demographic choropleth** — the Board already has ACS data for every county; shade the map by population, income, and poverty, turning it from a coverage indicator into an instrument.
 - **Fill the municipal skeleton** — the 19,513 city nodes exist; 2,229 carry officeholders. The work now is depth: pull municipal officeholders for the next states (Texas, California, Ohio all have a spine already), each a diff against a node that's waiting. Municipal ACS demographics would enrich every city node the way ACS already enriches counties.
 - **State and local bodies** — Bodies (as distinct institution files) currently exist only at the federal level. Mint them for state legislatures and, following the municipal layer, county commissions where they warrant a Body of their own.