diff --git a/lib/db/client.ts b/lib/db/client.ts
index 54b2984..6c5bb10 100644
--- a/lib/db/client.ts
+++ b/lib/db/client.ts
@@ -14,12 +14,43 @@ export interface GameDb {
   file: string;
 }
 
-// CREATE TABLE statements mirroring lib/db/schema.ts — keep in sync. Game tables land with
-// the turn engine; _meta is DB plumbing (not game state): a brand-new sql.js database exports
-// as ZERO bytes, so without at least one real table there would be nothing valid to persist
-// on the ./db volume from first boot.
+// CREATE TABLE statements mirroring lib/db/schema.ts — keep in sync. _meta is DB plumbing
+// (not game state): a brand-new sql.js database exports as ZERO bytes, so without at least
+// one real table there would be nothing valid to persist on the ./db volume from first boot.
 const DDL = `
 CREATE TABLE IF NOT EXISTS _meta (key TEXT PRIMARY KEY, value TEXT);
+
+CREATE TABLE IF NOT EXISTS saves (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  seed TEXT NOT NULL,
+  turn INTEGER NOT NULL DEFAULT 0,
+  created_at TEXT NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS solar_systems (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  save_id INTEGER NOT NULL REFERENCES saves(id),
+  name TEXT NOT NULL,
+  x REAL NOT NULL,
+  y REAL NOT NULL,
+  discovered INTEGER NOT NULL DEFAULT 0,
+  is_current INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE TABLE IF NOT EXISTS jump_routes (
+  from_system INTEGER NOT NULL REFERENCES solar_systems(id),
+  to_system INTEGER NOT NULL REFERENCES solar_systems(id),
+  PRIMARY KEY (from_system, to_system)
+);
+
+CREATE TABLE IF NOT EXISTS events (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  save_id INTEGER NOT NULL REFERENCES saves(id),
+  turn INTEGER NOT NULL,
+  type TEXT NOT NULL,
+  message TEXT NOT NULL,
+  created_at TEXT NOT NULL
+);
 `;
 
 // SPACE_WANDERER_DB_PATH override exists so unit tests can point at a temp file instead
diff --git a/lib/db/schema.ts b/lib/db/schema.ts
index f7f7410..201e40c 100644
--- a/lib/db/schema.ts
+++ b/lib/db/schema.ts
@@ -1,6 +1,47 @@
-// Drizzle schema for game state. EMPTY on purpose at scaffold stage (v0.1.0) — no game
-// tables yet; the first turn-engine/ship/crew tables land with the first game systems.
+import { integer, primaryKey, real, sqliteTable, text } from 'drizzle-orm/sqlite-core'
+
+// Drizzle schema for game state. Single-player by design: exactly ONE save row ever exists
+// (no auth/accounts), so every table hangs off saves.id but only one save is in play.
 // Column names/types here are the source of truth; matching CREATE TABLE statements live
 // in lib/db/client.ts (DDL) and must stay in sync with this file.
 
-export {};
+export const saves = sqliteTable('saves', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  // Seed for the deterministic world generator — same seed always regenerates the same world.
+  seed: text('seed').notNull(),
+  turn: integer('turn').notNull().default(0),
+  createdAt: text('created_at').notNull(),
+})
+
+export const solarSystems = sqliteTable('solar_systems', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  saveId: integer('save_id').notNull().references(() => saves.id),
+  name: text('name').notNull(),
+  // 0–100 coordinate space, rendered directly by the NodeGraph component.
+  x: real('x').notNull(),
+  y: real('y').notNull(),
+  discovered: integer('discovered', { mode: 'boolean' }).notNull().default(false),
+  isCurrent: integer('is_current', { mode: 'boolean' }).notNull().default(false),
+})
+
+// Jump routes, stored as directed pairs (both directions of each route) so adjacency and
+// "reachable from current" are single-row lookups. Read side dedupes for display.
+export const jumpRoutes = sqliteTable(
+  'jump_routes',
+  {
+    fromSystem: integer('from_system').notNull().references(() => solarSystems.id),
+    toSystem: integer('to_system').notNull().references(() => solarSystems.id),
+  },
+  (t) => [primaryKey({ columns: [t.fromSystem, t.toSystem] })],
+)
+
+// Append-only game log. Writers so far: new-game + jump events; later issues add more
+// writers and a read endpoint.
+export const events = sqliteTable('events', {
+  id: integer('id').primaryKey({ autoIncrement: true }),
+  saveId: integer('save_id').notNull().references(() => saves.id),
+  turn: integer('turn').notNull(),
+  type: text('type').notNull(),
+  message: text('message').notNull(),
+  createdAt: text('created_at').notNull(),
+})