Bring the data table generators into the repo

data/species.json and data/items.json were generated by scripts that
lived outside the tree, so nothing here recorded where the tables came
from or how to refresh them. Port both into tools/spritedata/, taking
the pokemon-showdown checkout as an argument instead of hardcoding an
absolute path.

Both reproduce the committed tables byte-identically against
pokemon-showdown f2fe71c87.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MQicnpaee6kQXGG7uVExLS

pnpm-lock.yaml

@@ -82,6 +82,12 @@ importers:
         specifier: ^3.4.1
         version: 3.5.1
 
+  tools/spritedata:
+    dependencies:
+      '@types/node':
+        specifier: ^24.10.7
+        version: 24.13.3
+
   tools/trim:
     dependencies:
       '@types/node':

tools/spritedata/items.ts

@@ -0,0 +1,46 @@
+import {createRequire} from 'node:module';
+import * as path from 'node:path';
+
+// Regenerates data/items.json from a pokemon-showdown checkout:
+//
+//   node tools/spritedata/items.ts ~/smogon/pokemon-showdown > data/items.json
+//
+// One sprite per item number, so items that share a number share a sprite and
+// collect their names in one entry: Aspear Berry is also Burnt Berry.
+
+type ItemEntry = {
+    type: 'item',
+    names: string[],
+    sid: string
+};
+
+type ItemsEntry = {
+    num: number,
+    name: string
+};
+
+let ps = process.argv[2];
+if (!ps) {
+    throw new Error('usage: node tools/spritedata/items.ts <pokemon-showdown checkout>');
+}
+
+let require = createRequire(import.meta.url);
+let {Items} = require(path.resolve(ps, 'dist/data/items.js')) as
+    {Items: Record<string, ItemsEntry>};
+
+let output: Record<string, ItemEntry> = {};
+
+for (let {num, name} of Object.values(Items)) {
+    let sid = Math.abs(num);
+    if (num < 0) sid |= 1 << 29;
+
+    let key = `i${sid}`;
+    let entry = output[key];
+    if (entry) {
+        entry.names.push(name);
+    } else {
+        output[key] = {type: 'item', names: [name], sid: key};
+    }
+}
+
+process.stdout.write(JSON.stringify(output, null, '    '));

tools/spritedata/package.json

@@ -0,0 +1,6 @@
+{
+    "type": "module",
+    "dependencies": {
+        "@types/node": "^24.10.7"
+    }
+}

tools/spritedata/species.ts

@@ -0,0 +1,56 @@
+import {createRequire} from 'node:module';
+import * as path from 'node:path';
+
+// Regenerates data/species.json from a pokemon-showdown checkout:
+//
+//   node tools/spritedata/species.ts ~/smogon/pokemon-showdown > data/species.json
+//
+// A sprite id packs the dex number and the game's forme index into one number,
+// with bit 29 marking the negative nums CAP and fakemon use. Gmax formes get no
+// id of their own; they ride on the base forme's -g flag.
+
+type SpecieEntry = {
+    type: 'specie',
+    num: number,
+    formeNum: number,
+    base: string,
+    forme: string,
+    sid: string
+};
+
+type PokedexEntry = {
+    num: number,
+    name: string,
+    baseSpecies?: string,
+    formeOrder?: string[]
+};
+
+let ps = process.argv[2];
+if (!ps) {
+    throw new Error('usage: node tools/spritedata/species.ts <pokemon-showdown checkout>');
+}
+
+let require = createRequire(import.meta.url);
+let {Pokedex} = require(path.resolve(ps, 'dist/data/pokedex.js')) as
+    {Pokedex: Record<string, PokedexEntry>};
+
+let output: Record<string, SpecieEntry> = {};
+
+for (let {num, name, baseSpecies, formeOrder} of Object.values(Pokedex)) {
+    // Formes are enumerated from their base species, not on their own.
+    if (baseSpecies) continue;
+    for (let [formeNum, formeName] of (formeOrder ?? [name]).entries()) {
+        // Gmax is a flag, not a forme.
+        if (formeName.endsWith('-Gmax')) continue;
+
+        let sid = (Math.abs(num) << 5) + formeNum;
+        if (num < 0) sid |= 1 << 29;
+
+        let forme = formeName.slice(name.length + 1);
+        let key = `s${sid}`;
+        if (output[key]) throw new Error(`duplicate sid ${key} for ${name}`);
+        output[key] = {type: 'specie', num, formeNum, base: name, forme, sid: key};
+    }
+}
+
+process.stdout.write(JSON.stringify(output, null, '    ') + '\n');

tools/spritedata/tsconfig.json

@@ -0,0 +1,3 @@
+{
+    "extends": "../../tsconfig-base"
+}

tsconfig-workspace.json

@@ -6,6 +6,7 @@
         {"path": "tools/deploy"},
         {"path": "tools/sheet"},
         {"path": "tools/smogdexspritesheet"},
+        {"path": "tools/spritedata"},
         {"path": "tools/trim"},
         {"path": "lib/root"},
         {"path": "data/lib"},