settled-reach/server/data/systems-schema.sql

-- Star Systems Database Schema — server/data/systems.db
-- Source of truth for all structured star system data.
-- Authored via tooling pipeline; wiki pages are generated views.
-- Shipped with the game — read-only from the server's perspective.
--
-- Rebuild: tooling/process-wiki-system-changes --rebuild-db

PRAGMA journal_mode=WAL;
PRAGMA foreign_keys=ON;

-- Core identity, physical character, political character
CREATE TABLE IF NOT EXISTS star_systems (
    system_id TEXT PRIMARY KEY,  -- GJ catalog number (e.g., "GJ 244A")
    proper_name TEXT,
    system_name TEXT,
    star_type TEXT,
    spectral_class TEXT,
    dist_ly REAL,
    geographic_sector TEXT,
    geographic_band TEXT,
    political_zone TEXT,

    -- Physical character
    habitable_planet_count INTEGER,
    inhabited_planet_count INTEGER,
    asteroid_belt INTEGER,   -- boolean 0/1
    gas_giant INTEGER,       -- boolean 0/1
    habitability_profile TEXT,

    -- Political character
    earth_alignment TEXT,
    earth_proximity TEXT,
    earth_tension TEXT,

    -- Content notes
    stability_index INTEGER,
    system_volatility TEXT,
    cultural_corridor TEXT,
    generation_priority TEXT,

    -- Short narrative hook extracted from the wiki's gttr.md file — the
    -- first characterisation paragraph ("where the rules live", "forty
    -- years old and still in the draft", etc). Populated by
    -- tooling/db/populate_gttr_hook.py from wiki/star-systems/<slug>/gttr.md.
    -- Used as compact cultural context in the Gemma 2 naming pipeline
    -- (#833) so per-system feel is grounded in the canonical identity
    -- rather than generic corridor labels.
    gttr_hook TEXT,

    -- Economics (D-172)
    currency_zone TEXT DEFAULT 'TRACTUS_PRIMARY',  -- TRACTUS_PRIMARY | MARK_PRIMARY | MIXED

    -- Energy-over-gate (D-186)
    -- Gate Corp energy service: on-grid nodes get ~0.3× fusion_fuel utility demand.
    -- MARK_PRIMARY zones default false (Compact refused Gate Corp dependency).
    gate_energy_connected INTEGER DEFAULT 1,  -- boolean 0/1

    updated_at TEXT DEFAULT (datetime('now'))
);

-- Gate infrastructure — queried independently for pathfinding/topology
CREATE TABLE IF NOT EXISTS system_gates (
    system_id TEXT PRIMARY KEY REFERENCES star_systems(system_id),
    horizon_station INTEGER,  -- boolean 0/1
    aperture_count INTEGER,
    gate_connections INTEGER,
    gate_topology TEXT,
    hop_distance_from_gateway INTEGER,
    span_gate_network TEXT
);

-- Settlement history
CREATE TABLE IF NOT EXISTS system_history (
    system_id TEXT PRIMARY KEY REFERENCES star_systems(system_id),
    settlement_wave TEXT,
    founding_motivation TEXT,
    founding_culture_primary TEXT,
    founding_culture_secondary TEXT,
    cultural_persistence TEXT,
    religious_status TEXT,
    religious_generation_count INTEGER
);

-- Historical events — proper 1:N child table
CREATE TABLE IF NOT EXISTS historical_events (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    system_id TEXT NOT NULL REFERENCES star_systems(system_id),
    event_type TEXT NOT NULL,
    age_years INTEGER,
    sort_order INTEGER NOT NULL DEFAULT 0  -- 0 = most recent
);

-- Economic life
CREATE TABLE IF NOT EXISTS system_economy (
    system_id TEXT PRIMARY KEY REFERENCES star_systems(system_id),
    economic_tier INTEGER,
    population INTEGER,
    economic_base_primary TEXT,
    economic_base_secondary TEXT,
    distribution_index TEXT,
    imprint_access TEXT
);

-- Faction presence
CREATE TABLE IF NOT EXISTS system_factions (
    system_id TEXT PRIMARY KEY REFERENCES star_systems(system_id),
    governance_type TEXT,
    dominant_faction TEXT,
    primary_fault_line TEXT,
    secondary_fault_line TEXT,
    assembly_presence TEXT,
    commission_presence TEXT,
    syndic_presence TEXT,
    syndic_type TEXT,
    separatist_presence TEXT,
    separatist_type TEXT,
    institute_presence TEXT,
    guardians_presence TEXT
);

-- Cultural voice
CREATE TABLE IF NOT EXISTS system_culture (
    system_id TEXT PRIMARY KEY REFERENCES star_systems(system_id),
    cultural_register TEXT,
    cultural_register_secondary TEXT,
    ambient_anxiety TEXT,
    local_pride TEXT,
    atmospheric_tone TEXT,
    atmospheric_tone_secondary TEXT,
    active_situation TEXT,
    silence_threshold TEXT,
    primary_archetype TEXT,
    secondary_archetype TEXT,
    narrative_notable INTEGER  -- boolean 0/1
);

-- Authored prose (supply_dependency, faction_notes, silence_topic,
-- narrative_hook, calibration_note) lives in wiki markdown files only.
-- No DB mirror — read the file if you need the text.

-- Celestial bodies — planets, moons, gas giants, asteroid belts, oort clouds
-- Naming convention:
--   GJ-{n}b/c/d...    — planets (innermost first)
--   GJ-{n}Ab/c/d...   — planets orbiting primary (binary systems)
--   GJ-{n}d-1          — first moon of third planet
--   GJ-{n}-oort        — oort cloud region
--   GJ-{n}-belt        — asteroid belt
CREATE TABLE IF NOT EXISTS bodies (
    body_id TEXT PRIMARY KEY,
    system_id TEXT NOT NULL REFERENCES star_systems(system_id),
    parent_body_id TEXT REFERENCES bodies(body_id),  -- NULL for planets; parent planet for moons

    -- Classification
    body_type TEXT NOT NULL,            -- planet, moon, gas_giant, asteroid_belt, oort_cloud
    orbit_index INTEGER,               -- innermost = 1 (planets around star, moons around planet)
    proper_name TEXT,                   -- "Xin Chengdu", NULL for unnamed

    -- Physical
    mass_class TEXT,                    -- terrestrial, super_earth, ice_giant, gas_giant, dwarf
    atmosphere TEXT,                    -- breathable, thin, toxic, none, dense
    surface_gravity REAL,              -- in g (Earth = 1.0), NULL for gas giants
    orbital_period_days REAL,          -- orbital period in Earth days, NULL for oort/belt
    rotation_period_hours REAL,        -- rotation period in Earth hours (Earth = 24), NULL for tidally locked/gas giants
    planet_class TEXT,                 -- temperate, arid, frozen, oceanic, volcanic, barren, etc.
    hydrosphere TEXT,                  -- ocean, ice, rivers, none, subsurface

    -- Settlement
    inhabited INTEGER NOT NULL DEFAULT 0,
    population INTEGER DEFAULT 0,
    economic_role TEXT,                -- manufacturing, agricultural, extraction, research, transit
    founding_age_years INTEGER,
    settlement_pattern TEXT,           -- urban_concentrated, dispersed_rural, orbital_only, domed, cave

    -- Cultural (inherited from system, can override)
    cultural_corridor TEXT,            -- override system corridor if different
    industrial_corridor TEXT,          -- MVG, Gate_Corp, DSMC, Prometheus, Agricultural_Syndic

    -- Rendering
    -- terrain_reference: repo-root-relative path to the body's heightmap PNG.
    -- Convention (enforced by populate_terrain_reference.py and assumed by
    -- generate_atlas.py and the Godot client's atlas scene loader):
    --   wiki/star-systems/<system_slug>/bodies/<body_id>/heightmap.png
    -- where <system_slug> = system_id with spaces replaced by hyphens
    -- (e.g. "GJ 244A" → "GJ-244A"). NULL means no heightmap has been
    -- generated for this body yet. The three downstream pipelines
    -- (populate, atlas generator, client loader) all assume this format —
    -- changing it requires updating all three sites together.
    terrain_reference TEXT,
    screenshot_path TEXT,              -- planetary shader screenshot path

    updated_at TEXT DEFAULT (datetime('now'))
);

-- Stations and orbital facilities
-- Naming: GJ-{n}b-S1 (first station orbiting planet b), GJ-{n}-oort-S1 (horizon station)
CREATE TABLE IF NOT EXISTS stations (
    station_id TEXT PRIMARY KEY,
    system_id TEXT NOT NULL REFERENCES star_systems(system_id),
    orbits_body_id TEXT REFERENCES bodies(body_id),

    -- Classification
    station_type TEXT NOT NULL,         -- horizon, commercial, military, research, industrial, agricultural, transit
    proper_name TEXT,                   -- "Chengdu Orbital", "Horizon Station"

    -- Settlement
    population INTEGER DEFAULT 0,
    economic_role TEXT,
    governance_type TEXT,              -- can differ from system governance

    -- Infrastructure
    docking_class TEXT,                -- major, standard, restricted, none
    has_gate_infrastructure INTEGER DEFAULT 0,
    district_count INTEGER DEFAULT 1,

    updated_at TEXT DEFAULT (datetime('now'))
);

-- Corporations, combines, and major economic entities
-- Source: wiki/corporations/ pages (canonical)
CREATE TABLE IF NOT EXISTS corporations (
    corp_id TEXT PRIMARY KEY,           -- slug from wiki (e.g., "gate-corporation", "vethara")
    proper_name TEXT NOT NULL,          -- display name
    corp_type TEXT NOT NULL,            -- corporation, combine, syndic, institution, independent
    scope TEXT,                         -- reach-wide, sector, system, local
    headquarters_system TEXT REFERENCES star_systems(system_id),
    headquarters_body TEXT,             -- body_id or station_id
    specialization TEXT,                -- primary product/service
    parent_corp TEXT REFERENCES corporations(corp_id),
    notes TEXT,

    -- Economics (D-175)
    behavioral_archetype TEXT,       -- Monopolist|Distributor|Producer|Specialist|Cooperative|Intermediary
    supply_chain_role TEXT,
    shadow_economy_access INTEGER DEFAULT 0,

    updated_at TEXT DEFAULT (datetime('now'))
);

-- Gate adjacency graph — bidirectional edges from star-map.json (D-178)
-- Transport cost computation: 5–12% per hop (gate edge), 1–3% (orbital edge)
CREATE TABLE IF NOT EXISTS gate_links (
    from_system_id TEXT NOT NULL REFERENCES star_systems(system_id),
    to_system_id TEXT NOT NULL REFERENCES star_systems(system_id),
    PRIMARY KEY (from_system_id, to_system_id)
);

-- Commodity catalog — 36 types (D-184)
-- Source: wiki/economics/commodities.toml
CREATE TABLE IF NOT EXISTS commodities (
    commodity_id TEXT PRIMARY KEY,
    name TEXT NOT NULL,
    tier TEXT NOT NULL,                      -- raw|intermediate|final|service_professional|service_luxury
    elasticity TEXT NOT NULL,                -- perfectly_inelastic|inelastic|unit_elastic|elastic
    base_price REAL NOT NULL,
    bulk_class TEXT,                         -- bulk|liquid|perishable|standard|compact|precision|oversized|non_physical
    unit TEXT,                               -- tonnes|units|contracts
    production_ubiquity TEXT,                -- ubiquitous|common|regional|concentrated|monopolistic
    demand_model TEXT,                       -- market|utility|compliance
    commission_certifiable INTEGER DEFAULT 0, -- subject to certification in TRACTUS_PRIMARY zones
    compact_contested INTEGER DEFAULT 0,
    shadow_viable INTEGER DEFAULT 0,
    panic_threshold_weeks INTEGER DEFAULT 0,
    description TEXT,
    updated_at TEXT DEFAULT (datetime('now'))
);

-- Leontief production chain recipes (D-178)
-- Source: wiki/economics/production_chains.toml
CREATE TABLE IF NOT EXISTS production_chains (
    chain_id TEXT PRIMARY KEY,
    output_commodity_id TEXT NOT NULL REFERENCES commodities(commodity_id),
    output_quantity REAL NOT NULL DEFAULT 1.0,
    location_bound INTEGER DEFAULT 0,
    description TEXT,
    updated_at TEXT DEFAULT (datetime('now'))
);

-- Input requirements per production chain
CREATE TABLE IF NOT EXISTS chain_inputs (
    chain_id TEXT NOT NULL REFERENCES production_chains(chain_id),
    input_commodity_id TEXT NOT NULL REFERENCES commodities(commodity_id),
    quantity REAL NOT NULL,
    PRIMARY KEY (chain_id, input_commodity_id)
);

-- Corporation operating locations (D-175)
-- Populated by corporation assignment pipeline, not by initial import
CREATE TABLE IF NOT EXISTS corp_presence (
    corp_id TEXT NOT NULL REFERENCES corporations(corp_id),
    location_id TEXT NOT NULL,              -- body_id or station_id
    location_type TEXT NOT NULL,            -- body|station
    primary_operation TEXT,
    updated_at TEXT DEFAULT (datetime('now')),
    PRIMARY KEY (corp_id, location_id)
);

-- Brand layer (D-189) — administered-price layer above commodity tâtonnement.
-- Brands consume commodities as demand nodes; they are NOT commodities (D-185).

CREATE TABLE IF NOT EXISTS brand_products (
    brand_product_id TEXT PRIMARY KEY,
    corp_id TEXT NOT NULL REFERENCES corporations(corp_id),
    product_name TEXT NOT NULL,
    brand_category TEXT NOT NULL,       -- terroir|heritage_craft|tech_premium|cultural|service_premium|commodity_branded|design_heritage|platform_catalogue
    value_trajectory TEXT NOT NULL,     -- appreciating|depreciating|timeless
    scarcity_class TEXT NOT NULL,       -- capped|constrained|scalable|unlimited
    product_subcategory TEXT,
    base_premium_multiplier REAL NOT NULL DEFAULT 1.0,
    premium_floor REAL NOT NULL DEFAULT 0.0,
    origin_system TEXT REFERENCES star_systems(system_id),
    terroir_locked INTEGER NOT NULL DEFAULT 0,  -- boolean: production bound to origin_system
    currency_denomination TEXT NOT NULL DEFAULT 'tractus',  -- tractus|mark|mixed|sol_adjacent
    shadow_viable INTEGER NOT NULL DEFAULT 0,               -- boolean: circulates in shadow economy
    brand_tier TEXT NOT NULL,           -- halo|volume
    halo_brand_id TEXT REFERENCES brand_products(brand_product_id),  -- NULL for halo tier
    updated_at TEXT DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS brand_inputs (
    brand_product_id TEXT NOT NULL REFERENCES brand_products(brand_product_id),
    commodity_id TEXT NOT NULL REFERENCES commodities(commodity_id),
    quantity REAL NOT NULL,
    PRIMARY KEY (brand_product_id, commodity_id)
);

-- Fiscal parameters per star system (D-189 section 5 + section 6)
CREATE TABLE IF NOT EXISTS system_fiscal (
    system_id TEXT PRIMARY KEY REFERENCES star_systems(system_id),
    corp_tax_rate REAL NOT NULL DEFAULT 0.22,           -- 0.0–1.0
    collection_efficiency REAL NOT NULL DEFAULT 1.0,    -- derived: 1.0 - shadow_intensity × 0.6
    updated_at TEXT DEFAULT (datetime('now'))
);

-- Phase 2: passive corp health tracking (D-189 section 8)
CREATE TABLE IF NOT EXISTS corp_financial_state (
    corp_id TEXT PRIMARY KEY REFERENCES corporations(corp_id),
    health_metric REAL NOT NULL DEFAULT 1.0,  -- 0.0 (distressed) to 1.0 (healthy)
    updated_at TEXT DEFAULT (datetime('now'))
);

-- Phase 3 lifecycle state machine stub (D-189 section 8) — schema correct, not driven yet
CREATE TABLE IF NOT EXISTS corp_lifecycle_events (
    event_id INTEGER PRIMARY KEY AUTOINCREMENT,
    corp_id TEXT NOT NULL REFERENCES corporations(corp_id),
    event_type TEXT NOT NULL,   -- Founded|Growing|Active|Distressed|Acquired|Dissolved
    event_tick INTEGER NOT NULL DEFAULT 0,
    event_data TEXT,            -- JSON blob for future lifecycle detail
    created_at TEXT DEFAULT (datetime('now'))
);

-- BEGIN ATLAS INDEX (D-191 §8, #832) -- DO NOT EDIT THE MARKER COMMENTS
-- Atlas index — scalar metadata mirror of markers.json files.
-- Source of truth is wiki/star-systems/.../markers.json (next to the heightmap);
-- these tables exist so the atlas implant app and development queries don't
-- have to scan hundreds of JSON files. Polyline geometry stays in the files —
-- the DB only stores scalar/filterable fields + `point_count` as a rough length
-- proxy. Populated and refreshed by tooling/planet-gen/generate_atlas.py, which
-- extracts this entire block (between BEGIN/END ATLAS INDEX markers) from this
-- file at runtime so the DDL lives in exactly one place.

-- Per-body grid dimensions (one row per body that has a markers.json).
-- Lets any query interpret the pixel coordinates below without touching disk.
CREATE TABLE IF NOT EXISTS atlas_body_grids (
    body_id TEXT PRIMARY KEY REFERENCES bodies(body_id) ON DELETE CASCADE,
    grid_w INTEGER NOT NULL,
    grid_h INTEGER NOT NULL,
    updated_at TEXT DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS atlas_cities (
    city_id TEXT PRIMARY KEY,                   -- "<body_id>/<local_id>" e.g. "GJ380c/city_0"
    body_id TEXT NOT NULL REFERENCES bodies(body_id) ON DELETE CASCADE,
    local_id TEXT NOT NULL,                     -- "city_0", "city_1" — matches markers.json id
    name TEXT NOT NULL DEFAULT '',
    kind TEXT NOT NULL,                         -- capital|city
    center_row INTEGER NOT NULL,
    center_col INTEGER NOT NULL,
    population INTEGER NOT NULL DEFAULT 0,
    updated_at TEXT DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS atlas_roads (
    road_id TEXT PRIMARY KEY,                   -- "<body_id>/<local_id>"
    body_id TEXT NOT NULL REFERENCES bodies(body_id) ON DELETE CASCADE,
    local_id TEXT NOT NULL,
    name TEXT NOT NULL DEFAULT '',
    kind TEXT NOT NULL,                         -- commercial|highway|rural|...
    point_count INTEGER NOT NULL,               -- path length proxy (full geometry in markers.json)
    updated_at TEXT DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS atlas_railroads (
    railroad_id TEXT PRIMARY KEY,               -- "<body_id>/<local_id>"
    body_id TEXT NOT NULL REFERENCES bodies(body_id) ON DELETE CASCADE,
    local_id TEXT NOT NULL,
    name TEXT NOT NULL DEFAULT '',
    kind TEXT NOT NULL,                         -- passenger_freight|freight|maglev|...
    point_count INTEGER NOT NULL,
    updated_at TEXT DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS atlas_pois (
    poi_id TEXT PRIMARY KEY,                    -- "<body_id>/<local_id>"
    body_id TEXT NOT NULL REFERENCES bodies(body_id) ON DELETE CASCADE,
    local_id TEXT NOT NULL,
    name TEXT NOT NULL DEFAULT '',
    kind TEXT NOT NULL,                         -- transit|institutional|cultural|...
    center_row INTEGER NOT NULL,
    center_col INTEGER NOT NULL,
    updated_at TEXT DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS atlas_rivers (
    river_id TEXT PRIMARY KEY,                  -- "<body_id>/<local_id>"
    body_id TEXT NOT NULL REFERENCES bodies(body_id) ON DELETE CASCADE,
    local_id TEXT NOT NULL,
    name TEXT NOT NULL DEFAULT '',              -- empty for untitled procedural rivers
    point_count INTEGER NOT NULL,
    updated_at TEXT DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS atlas_oceans (
    water_id TEXT PRIMARY KEY,                  -- "<body_id>/<local_id>"
    body_id TEXT NOT NULL REFERENCES bodies(body_id) ON DELETE CASCADE,
    local_id TEXT NOT NULL,
    name TEXT NOT NULL DEFAULT '',
    kind TEXT NOT NULL,                         -- lake|sea|ocean
    center_row INTEGER NOT NULL,
    center_col INTEGER NOT NULL,
    area_fraction REAL NOT NULL DEFAULT 0.0,    -- fraction of heightmap area covered
    updated_at TEXT DEFAULT (datetime('now'))
);

CREATE TABLE IF NOT EXISTS atlas_mountain_ranges (
    range_id TEXT PRIMARY KEY,                  -- "<body_id>/<local_id>"
    body_id TEXT NOT NULL REFERENCES bodies(body_id) ON DELETE CASCADE,
    local_id TEXT NOT NULL,
    name TEXT NOT NULL DEFAULT '',
    center_row INTEGER NOT NULL,
    center_col INTEGER NOT NULL,
    peak_row INTEGER NOT NULL,
    peak_col INTEGER NOT NULL,
    area_cells INTEGER NOT NULL DEFAULT 0,
    updated_at TEXT DEFAULT (datetime('now'))
);

CREATE INDEX IF NOT EXISTS idx_atlas_cities_body ON atlas_cities(body_id);
CREATE INDEX IF NOT EXISTS idx_atlas_cities_kind ON atlas_cities(kind);
CREATE INDEX IF NOT EXISTS idx_atlas_cities_population ON atlas_cities(population);
CREATE INDEX IF NOT EXISTS idx_atlas_cities_name ON atlas_cities(name);
CREATE INDEX IF NOT EXISTS idx_atlas_roads_body ON atlas_roads(body_id);
CREATE INDEX IF NOT EXISTS idx_atlas_railroads_body ON atlas_railroads(body_id);
CREATE INDEX IF NOT EXISTS idx_atlas_pois_body ON atlas_pois(body_id);
CREATE INDEX IF NOT EXISTS idx_atlas_pois_kind ON atlas_pois(kind);
CREATE INDEX IF NOT EXISTS idx_atlas_rivers_body ON atlas_rivers(body_id);
CREATE INDEX IF NOT EXISTS idx_atlas_oceans_body ON atlas_oceans(body_id);
CREATE INDEX IF NOT EXISTS idx_atlas_mountain_ranges_body ON atlas_mountain_ranges(body_id);
-- END ATLAS INDEX (D-191 §8, #832)

-- Indexes
-- astronomical_id removed: system_id IS the GJ catalog number
CREATE INDEX IF NOT EXISTS idx_star_systems_sector ON star_systems(geographic_sector);
CREATE INDEX IF NOT EXISTS idx_star_systems_wave ON system_history(settlement_wave);
CREATE INDEX IF NOT EXISTS idx_star_systems_topology ON system_gates(gate_topology);
CREATE INDEX IF NOT EXISTS idx_star_systems_star_type ON star_systems(star_type);
CREATE INDEX IF NOT EXISTS idx_star_systems_volatility ON star_systems(system_volatility);
CREATE INDEX IF NOT EXISTS idx_historical_events_system ON historical_events(system_id);
CREATE INDEX IF NOT EXISTS idx_system_factions_dominant ON system_factions(dominant_faction);
CREATE INDEX IF NOT EXISTS idx_system_economy_tier ON system_economy(economic_tier);
CREATE INDEX IF NOT EXISTS idx_system_culture_archetype ON system_culture(primary_archetype);
CREATE INDEX IF NOT EXISTS idx_bodies_system ON bodies(system_id);
CREATE INDEX IF NOT EXISTS idx_bodies_parent ON bodies(parent_body_id);
CREATE INDEX IF NOT EXISTS idx_bodies_type ON bodies(body_type);
CREATE INDEX IF NOT EXISTS idx_bodies_inhabited ON bodies(inhabited);
CREATE INDEX IF NOT EXISTS idx_stations_system ON stations(system_id);
CREATE INDEX IF NOT EXISTS idx_stations_orbits ON stations(orbits_body_id);
CREATE INDEX IF NOT EXISTS idx_stations_type ON stations(station_type);
CREATE INDEX IF NOT EXISTS idx_corps_system ON corporations(headquarters_system);
CREATE INDEX IF NOT EXISTS idx_corps_type ON corporations(corp_type);
CREATE INDEX IF NOT EXISTS idx_star_systems_currency ON star_systems(currency_zone);
CREATE INDEX IF NOT EXISTS idx_gate_links_from ON gate_links(from_system_id);
CREATE INDEX IF NOT EXISTS idx_gate_links_to ON gate_links(to_system_id);

-- Generator metadata stamp (#855, #856)
-- One row per generator, updated on each successful non-dry-run.
-- schema_version: SHA-1 of server/data/systems-schema.sql content at generation time
-- generator_sha:  SHA-1 of the generator source file(s) content
-- generated_at:   ISO-8601 UTC timestamp of the run
--
-- Used by:
--   tooling/check-systems-db-stamp — verifies freshness before push (#857)
--   .config/hooks/pre-push         — rejects pushes with stale DB (#857)
--   /pr-push skill                 — triggers make regen-db if stale (#858)
CREATE TABLE IF NOT EXISTS meta (
    generator_name TEXT PRIMARY KEY,  -- 'import_economics' | 'generate_atlas' | 'generate_brands'
    schema_version TEXT NOT NULL,     -- SHA-1 hex of systems-schema.sql content
    generator_sha TEXT NOT NULL,      -- SHA-1 hex of generator source file(s) content
    generated_at TEXT NOT NULL DEFAULT (datetime('now'))
);
CREATE INDEX IF NOT EXISTS idx_commodities_tier ON commodities(tier);
CREATE INDEX IF NOT EXISTS idx_production_chains_output ON production_chains(output_commodity_id);
CREATE INDEX IF NOT EXISTS idx_chain_inputs_commodity ON chain_inputs(input_commodity_id);
CREATE INDEX IF NOT EXISTS idx_corp_presence_corp ON corp_presence(corp_id);
CREATE INDEX IF NOT EXISTS idx_corp_presence_location ON corp_presence(location_id);
-- Brand layer indexes (D-189 section 5 — composite for UI queries)
CREATE INDEX IF NOT EXISTS idx_brand_products_corp_category ON brand_products(corp_id, brand_category);
CREATE INDEX IF NOT EXISTS idx_brand_products_origin ON brand_products(origin_system);
CREATE INDEX IF NOT EXISTS idx_brand_products_tier ON brand_products(brand_tier);
CREATE INDEX IF NOT EXISTS idx_brand_inputs_commodity ON brand_inputs(commodity_id);
CREATE INDEX IF NOT EXISTS idx_corp_lifecycle_events_corp ON corp_lifecycle_events(corp_id);
-- Atlas index (D-191 §8, #832) — see BEGIN/END ATLAS INDEX block above.