diff --git a/packages/persona-kit/package.json b/packages/persona-kit/package.json
index 511fcba..9a8eeea 100644
--- a/packages/persona-kit/package.json
+++ b/packages/persona-kit/package.json
@@ -41,7 +41,7 @@
     "lint": "tsc -p tsconfig.json --noEmit"
   },
   "dependencies": {
-    "@relayfile/adapter-core": "^0.3.59",
+    "@relayfile/adapter-core": "^0.3.60",
     "@relayfile/local-mount": "^0.7.24"
   },
   "devDependencies": {
diff --git a/packages/runtime/package.json b/packages/runtime/package.json
index fefee0d..94c3d35 100644
--- a/packages/runtime/package.json
+++ b/packages/runtime/package.json
@@ -56,7 +56,7 @@
     "@agent-assistant/proactive": "^0.4.32",
     "@agent-relay/events": "^6.3.3",
     "@agentworkforce/persona-kit": "workspace:*",
-    "@relayfile/adapter-core": "^0.3.59",
+    "@relayfile/adapter-core": "^0.3.60",
     "agent-trajectories": "^0.5.3"
   }
 }
diff --git a/packages/runtime/src/clients/index.ts b/packages/runtime/src/clients/index.ts
index ab54058..1fdc921 100644
--- a/packages/runtime/src/clients/index.ts
+++ b/packages/runtime/src/clients/index.ts
@@ -1,9 +1,8 @@
-import * as adapterVfsClient from '@relayfile/adapter-core/vfs-client';
 import {
   writeJsonFile as coreWriteJsonFile,
-  RelayfileWritebackError,
+  normalizeWritebackStatus,
+  WritebackError,
   type IntegrationClientOptions,
-  type WritebackReceipt,
   type WritebackResult
 } from '@relayfile/adapter-core/vfs-client';
 
@@ -25,8 +24,12 @@ export {
   readTextFile,
   resolveMountRoot,
   RelayfileWritebackError,
+  WritebackError,
+  normalizeWritebackStatus,
   type RelayfileWritebackErrorOptions,
   type IntegrationClientOptions,
+  type NormalizedWritebackState,
+  type NormalizedWritebackStatus,
   type WritebackReceipt,
   type WritebackResult
 } from '@relayfile/adapter-core/vfs-client';
@@ -37,101 +40,6 @@ export {
   SandboxNotAvailableError
 } from '../errors.js';
 
-export type NormalizedWritebackState =
-  | 'succeeded'
-  | 'no_receipt'
-  | 'validation_failed'
-  | 'readonly_rejected'
-  | 'adapter_error'
-  | 'ok';
-
-export interface NormalizedWritebackStatus {
-  state: NormalizedWritebackState;
-  path: string;
-  op?: 'create' | 'patch' | 'delete';
-  id?: string;
-  error?: string;
-  field?: string;
-  receipt?: WritebackReceipt;
-  timestamp?: string;
-  entry?: unknown;
-}
-
-type AdapterVfsClientExtensions = {
-  normalizeWritebackStatus?: (
-    result?: WritebackResult,
-    entry?: unknown
-  ) => NormalizedWritebackStatus;
-  WritebackError?: new (normalized: NormalizedWritebackStatus) => RelayfileWritebackError &
-    NormalizedWritebackStatus;
-};
-
-class FallbackWritebackError extends RelayfileWritebackError {
-  readonly state: NormalizedWritebackState;
-  readonly path: string;
-  readonly op?: 'create' | 'patch' | 'delete';
-  readonly id?: string;
-  readonly receipt?: WritebackReceipt;
-  readonly error?: string;
-  readonly field?: string;
-  readonly timestamp?: string;
-
-  constructor(normalized: NormalizedWritebackStatus) {
-    super({
-      provider: 'writeback',
-      operation: normalized.state,
-      cause: normalized.error ? new Error(normalized.error) : undefined,
-      retryable: false
-    });
-    this.name = 'WritebackError';
-    this.message = `writeback ${normalized.state} ${normalized.path}${
-      normalized.error ? `: ${normalized.error}` : ''
-    }`;
-    this.state = normalized.state;
-    this.path = normalized.path;
-    this.op = normalized.op;
-    this.id = normalized.id;
-    this.receipt = normalized.receipt;
-    this.error = normalized.error;
-    this.field = normalized.field;
-    this.timestamp = normalized.timestamp;
-  }
-}
-
-const adapterExtensions = adapterVfsClient as AdapterVfsClientExtensions;
-
-export const WritebackError = adapterExtensions.WritebackError ?? FallbackWritebackError;
-
-export function normalizeWritebackStatus(
-  result?: WritebackResult,
-  entry?: unknown
-): NormalizedWritebackStatus {
-  const normalize = adapterExtensions.normalizeWritebackStatus;
-  if (normalize) return normalize(result, entry);
-
-  if (!result?.receipt) {
-    return {
-      state: 'no_receipt',
-      path: result?.path ?? '',
-      error: 'writeback produced no receipt'
-    };
-  }
-
-  const receipt = result.receipt;
-  const id =
-    receipt.id !== undefined
-      ? String(receipt.id)
-      : receipt.created !== undefined
-        ? String(receipt.created)
-        : undefined;
-  return {
-    state: 'succeeded',
-    path: result.path,
-    ...(id ? { id } : {}),
-    receipt
-  };
-}
-
 export async function writeJsonFile(
   client: IntegrationClientOptions,
   provider: string,
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 2dd0b47..f371df5 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -109,8 +109,8 @@ importers:
   packages/persona-kit:
     dependencies:
       '@relayfile/adapter-core':
-        specifier: ^0.3.59
-        version: 0.3.59(@relayfile/sdk@0.7.40)
+        specifier: ^0.3.60
+        version: 0.3.60(@relayfile/sdk@0.7.40)
       '@relayfile/local-mount':
         specifier: ^0.7.24
         version: 0.7.24
@@ -143,8 +143,8 @@ importers:
         specifier: workspace:*
         version: link:../persona-kit
       '@relayfile/adapter-core':
-        specifier: ^0.3.59
-        version: 0.3.59(@relayfile/sdk@0.7.40)
+        specifier: ^0.3.60
+        version: 0.3.60(@relayfile/sdk@0.7.40)
       agent-trajectories:
         specifier: ^0.5.3
         version: 0.5.3
@@ -954,8 +954,8 @@ packages:
     resolution: {integrity: sha512-C5eVSepGrlQY5b1yg+LfROLYhDW/w1WFVsuitRzvbXMr+qpFYFHLoMNxa9R0Q6ZiP02r6EXSazii2VNo2LZ0Vg==}
     engines: {node: '>=22'}
 
-  '@relayfile/adapter-core@0.3.59':
-    resolution: {integrity: sha512-lJG/trIkLr79+R6JVlWSf+DoF8fyAvl7x4KmgeGcaaTKK0PkQgjseDHm3NWsKan6WlfVjiw91jJrwZBIvJ9kJw==}
+  '@relayfile/adapter-core@0.3.60':
+    resolution: {integrity: sha512-Q7qSvgTX+0r+OUSfEwVE8VoVQeweR3yVm4K9Z9mQkEXian0u0BDHEmWle3PQkDyTYovVaMglg9e5Y0w7hF3Dnw==}
     engines: {node: '>=18'}
     hasBin: true
     peerDependencies:
@@ -2021,8 +2021,8 @@ packages:
   undici-types@6.21.0:
     resolution: {integrity: sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==}
 
-  undici@7.25.0:
-    resolution: {integrity: sha512-xXnp4kTyor2Zq+J1FfPI6Eq3ew5h6Vl0F/8d9XU5zZQf1tX9s2Su1/3PiMmUANFULpmksxkClamIZcaUqryHsQ==}
+  undici@7.28.0:
+    resolution: {integrity: sha512-cRZYrTDwWznlnRiPjggAGxZXanty6M8RV1ff8Wm4LWXBp7/IG8v5DnOm74DtUBp9OONpK75YlPnIjQqX0dBDtA==}
     engines: {node: '>=20.18.1'}
 
   unpipe@1.0.0:
@@ -3275,7 +3275,7 @@ snapshots:
       '@relayburn/sdk-linux-arm64-gnu': 2.5.2
       '@relayburn/sdk-linux-x64-gnu': 2.5.2
 
-  '@relayfile/adapter-core@0.3.59(@relayfile/sdk@0.7.40)':
+  '@relayfile/adapter-core@0.3.60(@relayfile/sdk@0.7.40)':
     dependencies:
       '@relayfile/sdk': 0.7.40
       '@scalar/postman-to-openapi': 0.6.3
@@ -3655,7 +3655,7 @@ snapshots:
       parse5: 7.3.0
       parse5-htmlparser2-tree-adapter: 7.1.0
       parse5-parser-stream: 7.1.2
-      undici: 7.25.0
+      undici: 7.28.0
       whatwg-mimetype: 4.0.0
 
   chownr@3.0.0: {}
@@ -4426,7 +4426,7 @@ snapshots:
 
   undici-types@6.21.0: {}
 
-  undici@7.25.0: {}
+  undici@7.28.0: {}
 
   unpipe@1.0.0: {}