fix(ecs): update() accepts undefined to remove a required component

package.json

@@ -1,6 +1,6 @@
 {
   "name": "data-monorepo",
-  "version": "0.10.28",
+  "version": "0.10.29",
   "private": true,
   "engines": {
     "node": ">=24"

packages/data-ai/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "adobe-data-ai",
-  "version": "0.10.28",
+  "version": "0.10.29",
   "description": "Architecture skills for @adobe/data — data-oriented modelling, archetype iteration, hot-path performance, and related conventions.",
   "author": {
     "name": "Adobe"

packages/data-ai/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@adobe/data-ai",
-  "version": "0.10.28",
+  "version": "0.10.29",
   "description": "Cross-agent architecture skills for @adobe/data — installable as a Claude Code plugin or copied into any Agent-Skills-compatible agent (Cursor, Codex).",
   "type": "module",
   "private": false,

packages/data-gpu/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@adobe/data-gpu",
-  "version": "0.10.28",
+  "version": "0.10.29",
   "description": "Adobe data WebGPU plugins and types for graphics and compute",
   "type": "module",
   "private": false,

packages/data-lit/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@adobe/data-lit",
-  "version": "0.10.28",
+  "version": "0.10.29",
   "description": "Adobe data Lit bindings - hooks, elements, decorators",
   "type": "module",
   "private": false,

packages/data-persistence/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@adobe/data-persistence",
-    "version": "0.10.28",
+    "version": "0.10.29",
     "description": "Worker-based incremental persistence layer for @adobe/data ECS over OPFS (browser) and node:fs (server).",
     "type": "module",
     "sideEffects": false,

packages/data-react/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@adobe/data-react",
-  "version": "0.10.28",
+  "version": "0.10.29",
   "description": "Adobe data React bindings — hooks and context for ECS database",
   "type": "module",
   "private": false,

packages/data-rpc/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@adobe/data-rpc",
-    "version": "0.10.28",
+    "version": "0.10.29",
     "description": "Schema-driven, bidirectional projection of @adobe/data async data services across a boundary (iframe / MessagePort / Worker). Only Data crosses the wire.",
     "type": "module",
     "sideEffects": false,

packages/data-solid/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@adobe/data-solid",
-  "version": "0.10.28",
+  "version": "0.10.29",
   "description": "Adobe data SolidJS bindings — context and provider for ECS database",
   "type": "module",
   "private": false,

packages/data-sync/package.json

@@ -1,6 +1,6 @@
 {
     "name": "@adobe/data-sync",
-    "version": "0.10.28",
+    "version": "0.10.29",
     "description": "Multi-user real-time synchronisation for @adobe/data ECS — server, client, and in-process loopback.",
     "type": "module",
     "sideEffects": false,

packages/data-testing/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@adobe/data-testing",
-  "version": "0.10.28",
+  "version": "0.10.29",
   "description": "Conformance-testing utilities (Match + Conformance runners) for @adobe/data ECS features",
   "type": "module",
   "sideEffects": false,

packages/data/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@adobe/data",
-  "version": "0.10.28",
+  "version": "0.10.29",
   "description": "Adobe data oriented programming library",
   "type": "module",
   "sideEffects": false,

packages/data/src/ecs/store/core/core.ts

@@ -15,7 +15,10 @@ import { PersistenceScope, ToDataOptions } from "../../persistence-scope.js";
 // stays a real column (see the Archetype interface) but is never part of a read.
 export type EntityValues<C> = { readonly [K in StringKeyof<C & OptionalComponents>]: (C & OptionalComponents)[K] }
 export type EntityReadValues<C> = { readonly [K in StringKeyof<C & OptionalComponents> as string extends K ? never : K]?: (C & OptionalComponents)[K] }
-export type EntityUpdateValues<C> = Partial<Omit<C, IdComponent>>;
+// `undefined` removes the component (the entity migrates to the archetype
+// without it), so every value admits it explicitly — under
+// `exactOptionalPropertyTypes` an optional key alone would not.
+export type EntityUpdateValues<C> = { [K in keyof Omit<C, IdComponent>]?: C[K] | undefined };
 
 export type ArchetypeQueryOptions<C extends object, PK extends string = never> = {
     exclude?: readonly StringKeyof<C & RequiredComponents & OptionalComponents>[];

packages/data/tsconfig.json

@@ -3,6 +3,9 @@
   "references": [
     {
       "path": "./src"
+    },
+    {
+      "path": "./type-tests/exact-optional"
     }
   ]
 }

packages/data/type-tests/exact-optional/tsconfig.json

@@ -0,0 +1,11 @@
+{
+  "extends": "../../tsconfig-base.json",
+  "compilerOptions": {
+    "rootDir": ".",
+    "noEmit": true,
+    "tsBuildInfoFile": "../../dist/type-tests/exact-optional.tsbuildinfo",
+    "exactOptionalPropertyTypes": true
+  },
+  "include": ["**/*.ts"],
+  "references": [{ "path": "../../src" }]
+}

packages/data/type-tests/exact-optional/update-removes-component.type-test.ts

@@ -0,0 +1,30 @@
+// © 2026 Adobe. MIT License. See /LICENSE for details.
+
+import { Database } from "../../src/ecs/index.js";
+
+/**
+ * Compile-time tests under `exactOptionalPropertyTypes`: `update(entity, { c: undefined })`
+ * removes component `c`, so it must type-check without a cast even when `c` is required.
+ */
+
+const db = Database.create(Database.Plugin.create({
+    components: {
+        parent: { type: "number" },
+        label: { type: "string" },
+    },
+    archetypes: {
+        Child: ["parent", "label"],
+    },
+    transactions: {
+        sever(t, entity: number) {
+            t.update(entity, { parent: undefined });
+        },
+        relabel(t, { entity, label }: { entity: number; label: string }) {
+            t.update(entity, { label });
+            // @ts-expect-error a removal does not widen the value type
+            t.update(entity, { label: 1 });
+        },
+    },
+}));
+
+db.transactions.sever(0);