diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index 9b9fffb..ba1b0d4 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -11,5 +11,5 @@ jobs:
         with:
           node-version: '20.x'
 
-      - run: npm
+      - run: npm install
       - run: npm run lint
diff --git a/.github/workflows/publish-experimental.yml b/.github/workflows/publish-experimental.yml
index fc09ca0..60fc536 100644
--- a/.github/workflows/publish-experimental.yml
+++ b/.github/workflows/publish-experimental.yml
@@ -14,7 +14,7 @@ jobs:
           registry-url: 'https://registry.npmjs.org'
           scope: '@liarco'
 
-      - run: npm
+      - run: npm install
       - run: npm run lint && npm run build
       - run: npm version --no-git-tag-version --no-commit-hooks "0.0.0-experimental.${{ github.sha }}" && npm publish
         env:
diff --git a/.github/workflows/publish-releases.yml b/.github/workflows/publish-releases.yml
index 1912f5e..b4276fe 100644
--- a/.github/workflows/publish-releases.yml
+++ b/.github/workflows/publish-releases.yml
@@ -15,7 +15,7 @@ jobs:
           registry-url: 'https://registry.npmjs.org'
           scope: '@liarco'
 
-      - run: npm
+      - run: npm install
       - run: npm run lint && npm run build
       - run: npm publish
         env:
diff --git a/src/index.ts b/src/index.ts
index d48a5b8..5e63ed5 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,4 @@
+// TODO: Narrow down the exports to only the ones that are actually needed
 export * from './lib/rarities';
 export * from './lib/tags';
 export * from './lib/nftTags';
diff --git a/src/lib/customWeightingRules.ts b/src/lib/customWeightingRules.ts
index d6b5c14..525a908 100644
--- a/src/lib/customWeightingRules.ts
+++ b/src/lib/customWeightingRules.ts
@@ -1,7 +1,11 @@
 import { Item } from '../data/items';
 
+export type CustomWeightingRulesOptions = {
+  space_theme__egyptian_theme_weight?: number;
+};
+
 type CustomWeightingRules = {
-  [name: string]: (item: Item) => number | null;
+  [name: string]: (item: Item, options?: CustomWeightingRulesOptions) => number | null;
 };
 
 export const customWeightingRules: CustomWeightingRules = {
@@ -26,12 +30,14 @@ export const customWeightingRules: CustomWeightingRules = {
   // ------------------------------------------------------
   // Space theme
   // ------------------------------------------------------
-  space_theme: (item: Item) => {
+  space_theme: (item: Item, customSettings?: CustomWeightingRulesOptions) => {
     if (!item.metadata.tags.includes('space')) {
       return null;
     }
 
-    // TODO: This is just a proof of concept to show how to give a custom weight to the "Evermore" theme of a space
-    return item.extra?.attributes?.find((attribute) => attribute.name === 'theme')?.value === 'Evermore' ? 15 : 0;
+    // TODO: This is just a proof of concept to show how to give a custom weight to the theme of a space
+    return item.extra?.attributes?.find((attribute) => attribute.name === 'theme')?.value === 'Evermore'
+      ? 15
+      : customSettings?.space_theme__egyptian_theme_weight ?? 0;
   },
 } as const;
diff --git a/src/lib/items.ts b/src/lib/items.ts
index 91e5c73..972c90e 100644
--- a/src/lib/items.ts
+++ b/src/lib/items.ts
@@ -1,15 +1,15 @@
 import { Item } from '../data/items';
 import { Rarity } from '../data/rarities';
-import { customWeightingRules } from './customWeightingRules';
-import { getNftTagRanking } from './nftTags';
-import { getRarityRanking } from './rarities';
-import { getTagRanking } from './tags';
+import { CustomWeightingRulesOptions, customWeightingRules } from './customWeightingRules';
+import { NftTagRankingOptions, getNftTagRanking } from './nftTags';
+import { RarityRankingOptions, getRarityRanking } from './rarities';
+import { TagRankingOptions, getTagRanking } from './tags';
 import { roundRankingValue } from './utils';
 
-const getCustomWeightRankings = (item: Item): [string, number | null][] => {
+const getCustomWeightRankings = (item: Item, options?: CustomWeightingRulesOptions): [string, number | null][] => {
   return Object.entries(customWeightingRules).map(([ruleName, rule]) => {
     try {
-      const ranking = rule(item);
+      const ranking = rule(item, options);
 
       return [ruleName, ranking === null ? null : roundRankingValue(ranking)];
     } catch (error) {
@@ -29,17 +29,36 @@ type ItemRankingResult = [
   },
 ];
 
-export const getItemRanking = (item: Item): ItemRankingResult => {
+type ItemRankingOptions = RarityRankingOptions &
+  TagRankingOptions &
+  NftTagRankingOptions & { customWeightingRulesOptions?: CustomWeightingRulesOptions };
+
+export const getItemRanking = (item: Item, options?: ItemRankingOptions): ItemRankingResult => {
   const maxSupply = item.metadata.maxIssuance;
-  const rarityRanking = getRarityRanking(item.metadata.rarity);
-  const tagRankingsData = item.metadata.tags.map((tag) => [tag, getTagRanking(tag)] as [string, number]);
+  const rarityRanking = getRarityRanking(item.metadata.rarity, { customRarityWeights: options?.customRarityWeights });
+  const tagRankingsData = item.metadata.tags.map(
+    (tag) =>
+      [tag, getTagRanking(tag, { customTagWeights: options?.customTagWeights, failIfUnknown: options?.failIfUnknown })] as [
+        string,
+        number,
+      ],
+  );
   const tagsRanking = tagRankingsData.reduce((ranking, [, currentTagRanking]) => ranking + (currentTagRanking ?? 0), 1);
-  const nftTagRankingsData = item.metadata.nftTags.map((nftTag) => [nftTag, getNftTagRanking(nftTag)] as [string, number]);
+  const nftTagRankingsData = item.metadata.nftTags.map(
+    (nftTag) =>
+      [
+        nftTag,
+        getNftTagRanking(nftTag, {
+          customNftTagWeights: options?.customNftTagWeights,
+          failIfUnknown: options?.failIfUnknown,
+        }),
+      ] as [string, number],
+  );
   const nftTagsRanking = nftTagRankingsData.reduce(
     (ranking, [, currentNftTagRanking]) => ranking + (currentNftTagRanking ?? 0),
     1,
   );
-  const customWeightRankingsData = getCustomWeightRankings(item);
+  const customWeightRankingsData = getCustomWeightRankings(item, options?.customWeightingRulesOptions);
   const customWeightRanking = customWeightRankingsData.reduce(
     (ranking, [, currentRanking]) => ranking + (currentRanking ?? 0),
     1,
diff --git a/src/lib/nftTags.ts b/src/lib/nftTags.ts
index 7c2c3a8..678b26c 100644
--- a/src/lib/nftTags.ts
+++ b/src/lib/nftTags.ts
@@ -1,7 +1,7 @@
 import { nftTagWeights } from '../data/nftTags';
 import { roundRankingValue } from './utils';
 
-type NftTagRankingOptions = {
+export type NftTagRankingOptions = {
   customNftTagWeights?: {
     [name: string]: number;
   };
diff --git a/src/lib/rarities.ts b/src/lib/rarities.ts
index 1ae9af1..450f965 100644
--- a/src/lib/rarities.ts
+++ b/src/lib/rarities.ts
@@ -1,7 +1,7 @@
 import { Rarity, rarityWeights } from '../data/rarities';
 import { roundRankingValue } from './utils';
 
-type RarityRankingOptions = {
+export type RarityRankingOptions = {
   customRarityWeights?: {
     [name: string]: number;
   };
diff --git a/src/lib/tags.ts b/src/lib/tags.ts
index e784aa5..026a9c1 100644
--- a/src/lib/tags.ts
+++ b/src/lib/tags.ts
@@ -1,7 +1,7 @@
 import { tagWeights } from '../data/tags';
 import { roundRankingValue } from './utils';
 
-type TagRankingOptions = {
+export type TagRankingOptions = {
   customTagWeights?: {
     [name: string]: number;
   };