feat: add source-owned combat mechanic programs

src/lib/server/conditional-effects.test.ts

@@ -0,0 +1,76 @@
+import { describe, expect, it } from 'vitest';
+import { conditionalRuleDraftFromRows } from './conditional-effects.js';
+
+const rule = {
+	id: 'rule-1',
+	simulation_readiness: 'simulation_ready',
+	scenario_inputs_json: '[]'
+};
+
+const clause = {
+	id: 'clause-1',
+	rule_id: 'rule-1',
+	clause_key: 'hit',
+	label: 'Hit',
+	event_kind: 'weapon_hit',
+	conditions_json: '{"kind":"true"}',
+	reducer_json: '{"kind":"none"}',
+	mutations_json: '[]',
+	sort_order: 1,
+	active: 1
+};
+
+const outcome = {
+	rule_id: 'rule-1',
+	clause_id: 'clause-1',
+	effect_key: 'damage',
+	outcome_key: 'Damage',
+	application_kind: 'active_modifier',
+	effect_scope: 'self',
+	stat_attribute_id: 'weapon-damage',
+	value_basis: 'flat',
+	value_scaling: 'flat',
+	damage_basis: null,
+	application_phase: 'while_active',
+	combat_timing: 'current',
+	resource_kind: null,
+	state_pool_id: null,
+	min_state_value: null,
+	max_state_value: null,
+	description_slot: 1,
+	value: 3,
+	value_expression_json: null
+};
+
+describe('conditional mechanic persistence adapter', () => {
+	it('rejects divergent metadata across value variants', () => {
+		expect(() => conditionalRuleDraftFromRows(
+			rule,
+			[],
+			[clause],
+			[
+				{ ...outcome, variant_key: 'I' },
+				{ ...outcome, variant_key: 'II', application_phase: 'after_event', value: 5 }
+			],
+			['I', 'II']
+		)).toThrow(/inconsistent application_phase metadata/);
+	});
+
+	it('loads consistent value variants into one outcome', () => {
+		const draft = conditionalRuleDraftFromRows(
+			rule,
+			[],
+			[clause],
+			[
+				{ ...outcome, variant_key: 'I' },
+				{ ...outcome, variant_key: 'II', value: 5 }
+			],
+			['I', 'II']
+		);
+
+		expect(draft?.clauses[0].outcomes[0].variants).toEqual({
+			I: { value: 3 },
+			II: { value: 5 }
+		});
+	});
+});