diff --git a/executor/src/core/Ad4mCore.ts b/executor/src/core/Ad4mCore.ts
index ae6294a67..57b0b5327 100644
--- a/executor/src/core/Ad4mCore.ts
+++ b/executor/src/core/Ad4mCore.ts
@@ -1,21 +1,26 @@
-import type { Address, PublicSharing, PerspectiveHandle, Perspective, LanguageLanguageInput, LanguageExpression, LanguageMetaInput, AgentExpression, Language, NeighbourhoodExpression  } from '@coasys/ad4m'
-import { parseExprUrl, LanguageRef, Neighbourhood, PerspectiveState } from '@coasys/ad4m'
-
-import * as Config from './Config'
-import * as Db from './db'
-import type { Ad4mDb } from './db'
-import HolochainService, { HolochainConfiguration } from './storage-services/Holochain/HolochainService';
+import type {
+    AgentExpression,
+    Language,
+    LanguageExpression,
+    LanguageLanguageInput,
+    LanguageMetaInput,
+    PublicSharing
+} from '@coasys/ad4m'
+import { LanguageRef } from '@coasys/ad4m'
+import { AgentInfoResponse } from '@holochain/client'
+import fs from 'node:fs'
+import { v4 as uuidv4 } from 'uuid'
 import AgentService from './agent/AgentService'
-import LanguageController from './LanguageController'
-import * as DIDs from './agent/DIDs'
 import type { DIDResolver } from './agent/DIDs'
-import * as PubSubDefinitions from './graphQL-interface/SubscriptionDefinitions'
-import fs from 'node:fs'
-import { AgentInfoResponse } from '@holochain/client'
-import { v4 as uuidv4 } from 'uuid';
+import * as DIDs from './agent/DIDs'
+import * as Config from './Config'
 import { MainConfig } from './Config'
-import { getPubSub, sleep } from "./utils";
-
+import type { Ad4mDb } from './db'
+import * as Db from './db'
+import * as PubSubDefinitions from './graphQL-interface/SubscriptionDefinitions'
+import LanguageController from './LanguageController'
+import HolochainService, { HolochainConfiguration } from './storage-services/Holochain/HolochainService'
+import { getPubSub } from './utils'
 export interface InitServicesParams {
     agentService: AgentService,
 }
@@ -285,4 +290,4 @@ export default class Ad4mCore {
 
 export function create(config: Config.CoreConfig): Ad4mCore {
     return new Ad4mCore(config)
-}
\ No newline at end of file
+}
diff --git a/executor/src/languages_extension.d.ts b/executor/src/languages_extension.d.ts
index 60bc4eb26..9ef68f3c2 100644
--- a/executor/src/languages_extension.d.ts
+++ b/executor/src/languages_extension.d.ts
@@ -1,9 +1,4 @@
-export interface LinkExpression {
-    author: string;
-    timestamp: string;
-    data: Triple;
-    proof: ExpressionProof;
-}
+import type { LinkExpression, PerspectiveDiff, PerspectiveExpression, PerspectiveState } from '@coasys/ad4m';
 
 export interface Triple {
     source?: string;
@@ -16,25 +11,10 @@ export interface ExpressionProof {
     signature: string;
 }
 
-export interface PerspectiveDiff {
-    additions: LinkExpression[];
-    removals: LinkExpression[];
-}
-
-export interface PerspectiveExpression {
-    author: string;
-    timestamp: string;
-    data: Perspective;
-    proof: ExpressionProof;
-}
-
 export interface Perspective {
     links: LinkExpression[];
 }
 
-// PerspectiveState is an enum in Rust, which can be represented as a union type in TypeScript
-export type PerspectiveState = 'PRIVATE' | 'NEIGHBOURHOOD_JOIN_INITIATED' | 'LINK_LANGUAGE_FAILED_TO_INSTALL' | 'LINK_LANGUAGE_INSTALLED_BUT_NOT_SYNCED' | 'SYNCED';
-
 declare global {
     interface RustLanguages {
         perspectiveDiffReceived: (diff: PerspectiveDiff, languageAddress: string) => void;
@@ -42,5 +22,5 @@ declare global {
         telepresenceSignalReceived: (signal: PerspectiveExpression, languageAddress: string) => void;
     }
 
-    const LANGUAGES: RustLanguages;
-}
\ No newline at end of file
+    const LANGUAGE_CONTROLLER: RustLanguages;
+}