diff --git a/lib/api/presets.ts b/lib/api/presets.ts
new file mode 100644
index 0000000..5b05186
--- /dev/null
+++ b/lib/api/presets.ts
@@ -0,0 +1,156 @@
+import { Elysia, t } from "elysia"
+import { createCrudRoutes } from "./crud-builder"
+import { communityPresets, presetSettings, settingDefinitions } from "@/lib/db/schema"
+import { db } from "@/lib/db/index"
+import { eq, sql } from "drizzle-orm"
+import { requireRole } from "@/lib/auth/guard"
+
+// ── Community Presets CRUD ────────────────────────────────────────
+export const presetsRoutes = createCrudRoutes(communityPresets, {
+  prefix: "/presets",
+  name: "Preset",
+  auth: { read: "public", write: "user", delete: "admin" },
+  search: { fields: ["name", "description"] },
+  filter: { fields: ["gameId", "hardwareSlug"] },
+})
+
+// ── Upvote endpoint ───────────────────────────────────────────────
+export const presetUpvoteRoutes = new Elysia({ prefix: "/presets" }).post(
+  "/:id/upvote",
+  async ({ params, request, set }) => {
+    const guard = await requireRole(request.headers, [
+      "user",
+      "contributor",
+      "admin",
+    ])
+    if (!guard.ok) {
+      set.status = guard.status
+      return { error: guard.error }
+    }
+
+    const [preset] = await db
+      .select()
+      .from(communityPresets)
+      .where(eq(communityPresets.id, params.id))
+      .limit(1)
+
+    if (!preset) {
+      set.status = 404
+      return { error: "Preset not found" }
+    }
+
+    const [updated] = await db
+      .update(communityPresets)
+      .set({
+        upvotes: sql`${communityPresets.upvotes} + 1`,
+        updatedAt: new Date(),
+      })
+      .where(eq(communityPresets.id, params.id))
+      .returning()
+
+    return updated
+  },
+  {
+    params: t.Object({ id: t.String() }),
+  },
+)
+
+// ── Preset Settings (nested under /presets/:presetId/settings) ────
+export const presetSettingsRoutes = new Elysia({
+  prefix: "/presets/:presetId/settings",
+})
+  // LIST all settings for a preset (with definition details)
+  .get(
+    "/",
+    async ({ params }) => {
+      const data = await db
+        .select({
+          id: presetSettings.id,
+          presetId: presetSettings.presetId,
+          settingDefinitionId: presetSettings.settingDefinitionId,
+          value: presetSettings.value,
+          settingName: settingDefinitions.name,
+          settingSlug: settingDefinitions.slug,
+          inputType: settingDefinitions.inputType,
+          options: settingDefinitions.options,
+          impactLevel: settingDefinitions.impactLevel,
+        })
+        .from(presetSettings)
+        .innerJoin(
+          settingDefinitions,
+          eq(presetSettings.settingDefinitionId, settingDefinitions.id),
+        )
+        .where(eq(presetSettings.presetId, params.presetId))
+
+      return data
+    },
+    {
+      params: t.Object({ presetId: t.String() }),
+    },
+  )
+  // UPSERT settings for a preset (bulk create/update)
+  .post(
+    "/",
+    async ({ params, body, request, set }) => {
+      const guard = await requireRole(request.headers, [
+        "user",
+        "contributor",
+        "admin",
+      ])
+      if (!guard.ok) {
+        set.status = guard.status
+        return { error: guard.error }
+      }
+
+      // Verify preset exists and user is the creator (or admin)
+      const [preset] = await db
+        .select()
+        .from(communityPresets)
+        .where(eq(communityPresets.id, params.presetId))
+        .limit(1)
+
+      if (!preset) {
+        set.status = 404
+        return { error: "Preset not found" }
+      }
+
+      if (preset.createdBy !== guard.user.id && guard.user.role !== "admin") {
+        set.status = 403
+        return { error: "Not authorized to modify this preset" }
+      }
+
+      // Delete existing settings and re-insert
+      await db
+        .delete(presetSettings)
+        .where(eq(presetSettings.presetId, params.presetId))
+
+      if (body.settings.length > 0) {
+        await db.insert(presetSettings).values(
+          body.settings.map((s: { settingDefinitionId: string; value: boolean | string | number }) => ({
+            presetId: params.presetId,
+            settingDefinitionId: s.settingDefinitionId,
+            value: s.value,
+          })),
+        )
+      }
+
+      // Return the updated settings
+      const data = await db
+        .select()
+        .from(presetSettings)
+        .where(eq(presetSettings.presetId, params.presetId))
+
+      return data
+    },
+    {
+      params: t.Object({ presetId: t.String() }),
+      body: t.Object({
+        settings: t.Array(
+          t.Object({
+            settingDefinitionId: t.String(),
+            value: t.Union([t.Boolean(), t.String(), t.Number()]),
+          }),
+        ),
+      }),
+    },
+  )