hashintel · claude · Jul 9, 2026 · Jul 9, 2026 · Jul 9, 2026 · Jul 9, 2026
diff --git a/.changeset/ts-6-0-3-migration.md b/.changeset/ts-6-0-3-migration.md
@@ -0,0 +1,5 @@
+---
+"@blockprotocol/graph": patch
+---
+
+Bump the `typescript` runtime dependency (used by the codegen module) from 5.9.3 to 6.0.3
diff --git a/.claude/hooks/package.json b/.claude/hooks/package.json
@@ -23,7 +23,7 @@
     "@vitest/coverage-istanbul": "4.1.8",
     "eslint": "9.39.4",
     "tsx": "4.20.6",
-    "typescript": "5.9.3",
+    "typescript": "6.0.3",
     "vitest": "4.1.8"
   }
 }
diff --git a/.claude/hooks/tsconfig.json b/.claude/hooks/tsconfig.json
@@ -2,6 +2,7 @@
   "extends": "@local/tsconfig/legacy-base-tsconfig-to-refactor.json",
   "include": ["*.ts"],
   "compilerOptions": {
+    "types": ["node"],
     "module": "NodeNext",
     "moduleResolution": "NodeNext"
   }

diff --git a/apps/hash-ai-worker-ts/package.json b/apps/hash-ai-worker-ts/package.json
@@ -94,8 +94,7 @@
     "puppeteer-core": "22.15.0",
     "sanitize-html": "2.17.4",
     "tsconfig-paths-webpack-plugin": "4.2.0",
-    "tsx": "4.20.6",
-    "typescript": "5.9.3"
+    "tsx": "4.20.6"
   },
   "devDependencies": {
     "@local/eslint": "workspace:*",
@@ -112,7 +111,7 @@
     "@vitest/coverage-istanbul": "4.1.8",
     "eslint": "9.39.4",
     "rimraf": "6.1.3",
-    "typescript": "5.9.3",
+    "typescript": "6.0.3",
     "vitest": "4.1.8",
     "wait-on": "9.0.1"
   }

diff --git a/...ctivities/flow-activities/write-google-sheet-action/convert-subgraph-to-sheet-requests.ts b/...ctivities/flow-activities/write-google-sheet-action/convert-subgraph-to-sheet-requests.ts
@@ -106,7 +106,7 @@ const createColumnsForEntity = (
 
   for (const { schema } of entityTypeAndParents) {
     for (const baseUrl of typedKeys(schema.properties)) {
-      properties.add(baseUrl as BaseUrl);
+      properties.add(baseUrl);
     }
     for (const linkTypeId of typedKeys(schema.links ?? {})) {
       links.add(linkTypeId);

diff --git a/apps/hash-ai-worker-ts/src/activities/shared/get-llm-response/get-openai-reponse.ts b/apps/hash-ai-worker-ts/src/activities/shared/get-llm-response/get-openai-reponse.ts
@@ -55,7 +55,7 @@ const mapLlmToolDefinitionToOpenAiToolDefinition = (
      */
     strict: false,
     name: tool.name,
-    parameters: tool.inputSchema as OpenAI.FunctionParameters,
+    parameters: tool.inputSchema,
     description: tool.description,
   },
 });

diff --git a/apps/hash-ai-worker-ts/src/activities/shared/get-llm-response/llm-message.ts b/apps/hash-ai-worker-ts/src/activities/shared/get-llm-response/llm-message.ts
@@ -362,7 +362,7 @@ export const mapOpenAiMessagesToLlmMessages = (params: {
             {
               role: "user",
               content: [toolResultContent],
-            } as LlmUserMessage,
+            },
           ];
         }
 

diff --git a/apps/hash-ai-worker-ts/tsconfig.build.json b/apps/hash-ai-worker-ts/tsconfig.build.json
@@ -3,6 +3,7 @@
   "include": ["src"],
   "compilerOptions": {
     "outDir": "dist",
+    "rootDir": "./src",
     "sourceMap": true,
     "inlineSources": true,
     "paths": {}

diff --git a/apps/hash-ai-worker-ts/tsconfig.json b/apps/hash-ai-worker-ts/tsconfig.json
@@ -2,6 +2,7 @@
   "extends": "@local/tsconfig/legacy-base-tsconfig-to-refactor.json",
   "include": ["src", "scripts", "eslint.config.js", "vitest.config.ts"],
   "compilerOptions": {
+    "types": ["node"],
     "module": "NodeNext",
     "moduleResolution": "NodeNext"
   }

diff --git a/apps/hash-api/package.json b/apps/hash-api/package.json
@@ -107,7 +107,6 @@
     "sanitize-html": "2.17.4",
     "ts-json-schema-generator": "1.5.1",
     "tsx": "4.20.6",
-    "typescript": "5.9.3",
     "ws": "8.21.0"
   },
   "devDependencies": {
@@ -133,7 +132,7 @@
     "@vitest/coverage-istanbul": "4.1.8",
     "eslint": "9.39.4",
     "rimraf": "6.1.3",
-    "typescript": "5.9.3",
+    "typescript": "6.0.3",
     "vitest": "4.1.8",
     "wait-on": "9.0.1"
   }

diff --git a/apps/hash-api/src/analysis/setup-analysis-handler/resolve-analysis.test.ts b/apps/hash-api/src/analysis/setup-analysis-handler/resolve-analysis.test.ts
@@ -1,10 +1,6 @@
 import { beforeEach, describe, expect, it, vi } from "vitest";
 
-import type {
-  ActorEntityUuid,
-  RoleName,
-  WebId,
-} from "@blockprotocol/type-system";
+import type { ActorEntityUuid, WebId } from "@blockprotocol/type-system";
 import type { FileStorageProvider } from "@local/hash-backend-utils/file-storage";
 import type Keyv from "keyv";
 
@@ -83,7 +79,7 @@ describe("resolveInvocation (supply-chain analyses)", () => {
     clearAnalysisRegistry();
     registerAnalyses(supplyChainAnalyses);
     mockedGetRole.mockReset();
-    mockedGetRole.mockResolvedValue("member" as RoleName);
+    mockedGetRole.mockResolvedValue("member");
   });
 
   it("resolves productGraph to a presigned graph artifact", async () => {

diff --git a/...ge/primitive/entity/before-update-entity-hooks/user-before-update-entity-hook-callback.ts b/...ge/primitive/entity/before-update-entity-hooks/user-before-update-entity-hook-callback.ts
@@ -33,11 +33,7 @@ import {
 
 import type { ImpureGraphContext } from "../../../../context-types";
 import type { BeforeUpdateEntityHookCallback } from "../update-entity-hooks";
-import type {
-  ActorEntityUuid,
-  BaseUrl,
-  WebId,
-} from "@blockprotocol/type-system";
+import type { ActorEntityUuid, BaseUrl } from "@blockprotocol/type-system";
 import type { UserProperties } from "@local/hash-isomorphic-utils/system-types/user";
 
 /**
@@ -255,7 +251,7 @@ export const userBeforeEntityUpdateHookCallback: BeforeUpdateEntityHookCallback
       await updateWebShortname(
         context.graphApi,
         { actorId: systemAccountId },
-        { webId: user.accountId as WebId, shortname: updatedShortname },
+        { webId: user.accountId, shortname: updatedShortname },
       );
     }
   };
diff --git a/apps/hash-api/src/graph/knowledge/system-types/comment.ts b/apps/hash-api/src/graph/knowledge/system-types/comment.ts
@@ -453,7 +453,7 @@ export const getCommentAncestorBlock: ImpureGraphFunction<
     )
   ) {
     // @todo - make sure the entity is really a block
-    return getBlockFromEntity({ entity: parentEntity as Block["entity"] });
+    return getBlockFromEntity({ entity: parentEntity });
   } else {
     return getCommentAncestorBlock(context, authentication, {
       commentEntityId: parentEntity.metadata.recordId.entityId,

diff --git a/apps/hash-api/src/graph/knowledge/system-types/user-secret.ts b/apps/hash-api/src/graph/knowledge/system-types/user-secret.ts
@@ -15,7 +15,6 @@ import type {
   MachineId,
   ProvidedEntityEditionProvenance,
   UserId,
-  WebId,
 } from "@blockprotocol/type-system";
 import type {
   UserSecretService,
@@ -165,7 +164,7 @@ export const createUserSecret = async <
     authentication,
     {
       entityTypeIds: [systemEntityTypes.userSecret.entityTypeId],
-      webId: userAccountId as WebId,
+      webId: userAccountId,
       entityUuid: userSecretEntityUuid,
       properties: secretMetadata,
       policies: [
@@ -188,7 +187,7 @@ export const createUserSecret = async <
     { graphApi, provenance },
     authentication,
     {
-      webId: userAccountId as WebId,
+      webId: userAccountId,
       entityUuid: usesUserSecretEntityUuid,
       properties: { value: {} },
       linkData: {

diff --git a/apps/hash-api/src/graphql/resolvers/knowledge/user/submit-early-access-form.ts b/apps/hash-api/src/graphql/resolvers/knowledge/user/submit-early-access-form.ts
@@ -10,7 +10,6 @@ import type {
   ResolverFn,
 } from "../../../api-types.gen";
 import type { LoggedInGraphQLContext } from "../../../context";
-import type { WebId } from "@blockprotocol/type-system";
 import type { ProspectiveUser } from "@local/hash-isomorphic-utils/system-types/prospectiveuser";
 
 export const submitEarlyAccessFormResolver: ResolverFn<
@@ -31,7 +30,7 @@ export const submitEarlyAccessFormResolver: ResolverFn<
     /** The user does not yet have permissions to create entities, so we do it with the HASH system account instead */
     authentication,
     {
-      webId: user.accountId as WebId,
+      webId: user.accountId,
       entityTypeIds: [systemEntityTypes.prospectiveUser.entityTypeId],
       properties: {
         value: {

diff --git a/apps/hash-api/src/graphql/resolvers/ontology/entity-type.ts b/apps/hash-api/src/graphql/resolvers/ontology/entity-type.ts
@@ -33,7 +33,6 @@ import type { GraphQLContext, LoggedInGraphQLContext } from "../../context";
 import type {
   EntityTypeWithMetadata,
   OntologyTemporalMetadata,
-  WebId,
 } from "@blockprotocol/type-system";
 import type { UserPermissionsOnEntityType } from "@local/hash-graph-sdk/authorization";
 import type {
@@ -55,7 +54,7 @@ export const createEntityTypeResolver: ResolverFn<
   const { webId, entityType } = params;
 
   const createdEntityType = await createEntityType(context, authentication, {
-    webId: webId ?? (user.accountId as WebId),
+    webId: webId ?? user.accountId,
     schema: entityType,
   });
 

diff --git a/apps/hash-api/src/graphql/resolvers/ontology/property-type.ts b/apps/hash-api/src/graphql/resolvers/ontology/property-type.ts
@@ -27,7 +27,6 @@ import type { GraphQLContext, LoggedInGraphQLContext } from "../../context";
 import type {
   OntologyTemporalMetadata,
   PropertyTypeWithMetadata,
-  WebId,
 } from "@blockprotocol/type-system";
 
 export const createPropertyTypeResolver: ResolverFn<
@@ -46,7 +45,7 @@ export const createPropertyTypeResolver: ResolverFn<
     context,
     authentication,
     {
-      webId: (webId ?? user.accountId) as WebId,
+      webId: webId ?? user.accountId,
       schema: propertyType,
     },
   );

diff --git a/apps/hash-api/src/integrations/google/oauth-callback.ts b/apps/hash-api/src/integrations/google/oauth-callback.ts
@@ -12,7 +12,6 @@ import { createEntity } from "../../graph/knowledge/primitive/entity";
 import { createUserSecret } from "../../graph/knowledge/system-types/user-secret";
 import { enabledIntegrations } from "../enabled-integrations";
 
-import type { WebId } from "@blockprotocol/type-system";
 import type {
   GoogleOAuth2CallbackRequest,
   GoogleOAuth2CallbackResponse,
@@ -125,7 +124,7 @@ export const googleOAuthCallback: RequestHandler<
 
     newGoogleAccountEntity = await createEntity(req.context, authentication, {
       entityTypeIds: [googleEntityTypes.account.entityTypeId],
-      webId: req.user.accountId as WebId,
+      webId: req.user.accountId,
       properties: googleAccountProperties,
     });
   }

diff --git a/apps/hash-api/src/integrations/linear/oauth.ts b/apps/hash-api/src/integrations/linear/oauth.ts
@@ -25,7 +25,6 @@ import type {
   EntityId,
   EntityUuid,
   UserId,
-  WebId,
 } from "@blockprotocol/type-system";
 import type { LinearIntegrationPropertiesWithMetadata } from "@local/hash-isomorphic-utils/system-types/linearintegration";
 import type { RequestHandler } from "express";
@@ -246,7 +245,7 @@ export const oAuthLinearCallback: RequestHandler<
       authentication,
       {
         entityTypeIds: [systemEntityTypes.linearIntegration.entityTypeId],
-        webId: userAccountId as WebId,
+        webId: userAccountId,
         entityUuid,
         properties: linearIntegrationProperties,
       },

diff --git a/apps/hash-api/tsconfig.json b/apps/hash-api/tsconfig.json
@@ -1,4 +1,7 @@
 {
   "extends": "@local/tsconfig/legacy-base-tsconfig-to-refactor.json",
-  "include": ["src", "codegen.config.ts", "vitest.config.ts"]
+  "include": ["src", "codegen.config.ts", "vitest.config.ts"],
+  "compilerOptions": {
+    "types": ["node"]
+  }
 }
diff --git a/apps/hash-frontend/package.json b/apps/hash-frontend/package.json
@@ -169,7 +169,7 @@
     "graphology-types": "0.24.8",
     "rimraf": "6.1.3",
     "sass": "1.93.2",
-    "typescript": "5.9.3",
+    "typescript": "6.0.3",
     "vitest": "4.1.8",
     "wait-on": "9.0.1",
     "webpack": "5.104.1"

diff --git a/apps/hash-frontend/src/blocks/use-fetch-block-subgraph.ts b/apps/hash-frontend/src/blocks/use-fetch-block-subgraph.ts
@@ -17,14 +17,8 @@ import type {
   QueryEntitySubgraphQueryVariables,
   SubgraphAndPermissions as SubgraphAndPermissionsGQL,
 } from "../graphql/api-types.gen";
+import type { EntityRootType, Subgraph } from "@blockprotocol/graph";
 import type {
-  EntityRootType,
-  KnowledgeGraphVertices,
-  Subgraph,
-} from "@blockprotocol/graph";
-import type {
-  ActorEntityUuid,
-  EntityEditionId,
   EntityId,
   PropertyObject,
   VersionedUrl,
@@ -65,8 +59,8 @@ export const useFetchBlockSubgraph = (): ((
         const placeholderEntity = new HashEntity({
           metadata: {
             recordId: {
-              entityId: "placeholder-account~entity-id-not-set" as EntityId,
-              editionId: now as string as EntityEditionId,
+              entityId: "placeholder-account~entity-id-not-set",
+              editionId: now,
             },
             entityTypeIds: blockEntityTypeIds,
             temporalVersioning: {
@@ -92,13 +86,13 @@ export const useFetchBlockSubgraph = (): ((
             archived: false,
             provenance: {
               edition: {
-                createdById: "placeholder-account" as ActorEntityUuid,
+                createdById: "placeholder-account",
                 actorType: "user",
                 origin: {
                   type: "web-app",
                 },
               },
-              createdById: "placeholder-account" as ActorEntityUuid,
+              createdById: "placeholder-account",
               createdAtTransactionTime: now,
               createdAtDecisionTime: now,
             },
@@ -140,7 +134,7 @@ export const useFetchBlockSubgraph = (): ((
                 inner: placeholderEntity,
               },
             },
-          } as KnowledgeGraphVertices,
+          },
           temporalAxes: {
             initial: subgraphTemporalAxes,
             resolved: subgraphTemporalAxes,

diff --git a/apps/hash-frontend/src/components/block-loader/block-loader.tsx b/apps/hash-frontend/src/components/block-loader/block-loader.tsx
@@ -33,7 +33,6 @@ import { RemoteBlock } from "../remote-block/remote-block";
 import { fetchEmbedCode } from "./fetch-embed-code";
 
 import type {
-  ArchiveEntityMessageCallback,
   CreateEntityMessageCallback,
   UpdateEntityMessageCallback,
   UploadFileRequestCallback,
@@ -452,9 +451,7 @@ export const BlockLoader: FunctionComponent<BlockLoaderProps> = ({
       deleteEntity: async (
         ...args: Parameters<GraphEmbedderMessageCallbacks["deleteEntity"]>
       ) => {
-        const res = await deleteEntity(
-          args[0] as Parameters<ArchiveEntityMessageCallback>[0],
-        );
+        const res = await deleteEntity(args[0]);
 
         await refetchSubgraph();
 

diff --git a/apps/hash-frontend/src/components/sandbox/framed-block/framed-block.tsx b/apps/hash-frontend/src/components/sandbox/framed-block/framed-block.tsx
@@ -29,10 +29,7 @@ export const FramedBlock: FunctionComponent = () => {
 
   const _beforeCapture = useCallback(
     (scope: Sentry.Scope) => {
-      scope.setTag(
-        "block",
-        blockProperties?.metadata.recordId.entityId as string,
-      );
+      scope.setTag("block", blockProperties?.metadata.recordId.entityId);
     },
     [blockProperties],
   );

diff --git a/apps/hash-frontend/src/lib/user-and-org.ts b/apps/hash-frontend/src/lib/user-and-org.ts
@@ -219,7 +219,7 @@ export const constructOrg = (params: {
     ) {
       hasBio = {
         linkEntity: linkEntityRevision,
-        profileBioEntity: rightEntityRevision as HashEntity<ProfileBio>,
+        profileBioEntity: rightEntityRevision,
       };
       continue;
     }

diff --git a/apps/hash-frontend/src/pages/@/[shortname].page/edit-pinned-entity-types-modal.tsx b/apps/hash-frontend/src/pages/@/[shortname].page/edit-pinned-entity-types-modal.tsx
@@ -35,7 +35,7 @@ import type {
   UpdateEntityMutationVariables,
 } from "../../../graphql/api-types.gen";
 import type { Org, User } from "../../../lib/user-and-org";
-import type { EntityTypeWithMetadata, WebId } from "@blockprotocol/type-system";
+import type { EntityTypeWithMetadata } from "@blockprotocol/type-system";
 import type { ModalProps } from "@mui/material";
 import type { FunctionComponent, ReactElement } from "react";
 import type {
@@ -102,7 +102,7 @@ export const EditPinnedEntityTypesModal: FunctionComponent<
   >(updateEntityMutation, { errorPolicy: "all" });
 
   const { createEntityType } = useBlockProtocolCreateEntityType(
-    authenticatedUser.accountId as WebId,
+    authenticatedUser.accountId,
   );
 
   const { control, reset, handleSubmit, formState } =
-Original file line number
+Diff line change
@@ Expand Up / @@ -362,7 +362,7 @@ export const mapOpenAiMessagesToLlmMessages = (params: { @@
                 {
                   role: "user",
                   content: [toolResultContent],
-                } as LlmUserMessage,
+                },
               ];
             }
@@ Expand Down @@