diff --git a/server/prisma/data/class-feature-options.ts b/server/prisma/data/class-feature-options.ts
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+/**
+ * Hand-curated ClassFeatureOption seed data for D-19 wizard sub-steps.
+ *
+ * Each entry's `optionsRef` matches a `ClassProgression.choiceOptionsRef` so the wizard
+ * can resolve choice → option list at runtime.
+ *
+ * `grants` and `proficiencyChanges` are option-level mechanical effects applied at commit
+ * (per RESEARCH.md §Open Question Q2 RESOLVED — symmetric with ClassProgression so the
+ * recompute pipeline is uniform).
+ *
+ * SOURCE: Archives of Nethys — PF2e Player Core + APG class entries.
+ * SCOPE: 16 D-16 classes' L1 (and other) choice points.
+ * SPLIT: Plan 03 ships Wizard School (worked example, ≥1 entry). Plan 03b ships the
+ * remaining classes — joint goal across both plans is ≥50 entries.
+ */
+
+import type { Proficiency } from '../../src/modules/leveling/lib/types';
+
+export interface ClassFeatureOptionEntry {
+  optionsRef: string; // matches ClassProgression.choiceOptionsRef
+  optionKey: string; // unique within optionsRef
+  name: string; // English (German via TranslationsService at runtime)
+  nameGerman?: string; // optional pre-translated German name
+  description: string; // English
+  grants: string[]; // class-feature names this option awards (e.g. ["Cloistered Cleric", "Domain Spell"])
+  proficiencyChanges?: Partial<
+    Record<'fortitude' | 'reflex' | 'will' | 'perception' | 'classDc' | 'ac', Proficiency>
+  >;
+}
+
+export const CLASS_FEATURE_OPTIONS: ClassFeatureOptionEntry[] = [
+  // ============================================================
+  // === WIZARD SCHOOL — worked example (Plan 03 ships ≥1 entry)
+  // === optionsRef: 'wizard-school'
+  // ============================================================
+  {
+    optionsRef: 'wizard-school',
+    optionKey: 'battle-magic',
+    name: 'School of Battle Magic',
+    description:
+      'You focus on offensive evocations and battlefield control, learning to bring overwhelming magical force to bear against your foes.',
+    grants: ['Battle Magic Curriculum', 'School Spell: Force Bolt'],
+  },
+  // (Plan 03b appends remaining Wizard schools: civic-wizardry, mentalism, protean-form, unified-magical-theory, universalist)
+
+  // ============================================================
+  // === Plan 03b appends entries below — section anchors:
+  // ============================================================
+  // === CLERIC DOCTRINE  (optionsRef: 'cleric-doctrine')                — Plan 03b
+  // === CHAMPION CAUSE   (optionsRef: 'champion-cause')                 — Plan 03b
+  // === DRUID ORDER      (optionsRef: 'druid-order')                    — Plan 03b
+  // === SORCERER BLOOD.  (optionsRef: 'sorcerer-bloodline')             — Plan 03b
+  // === BARD MUSE        (optionsRef: 'bard-muse')                      — Plan 03b
+  // === BARBARIAN INST.  (optionsRef: 'barbarian-instinct')             — Plan 03b
+  // === WITCH PATRON     (optionsRef: 'witch-patron')                   — Plan 03b
+  // === ORACLE MYSTERY   (optionsRef: 'oracle-mystery')                 — Plan 03b
+  // === INVESTIGATOR     (optionsRef: 'investigator-methodology')       — Plan 03b
+  // === RANGER EDGE      (optionsRef: 'ranger-edge')                    — Plan 03b
+  // === ROGUE RACKET     (optionsRef: 'rogue-racket')                   — Plan 03b
+  // === SWASHBUCKLER     (optionsRef: 'swashbuckler-style')             — Plan 03b
+  // === ALCHEMIST RES.   (optionsRef: 'alchemist-research-field')       — Plan 03b
+  // (Fighter / Monk: no L1 choice — Fighter L5 weapon-mastery and Monk L1 stance via class feats)
+];