diff --git a/packages/access-client/package.json b/packages/access-client/package.json
index 2f1f398d9..a3cba524c 100644
--- a/packages/access-client/package.json
+++ b/packages/access-client/package.json
@@ -113,7 +113,24 @@
     "rules": {
       "unicorn/prefer-number-properties": "off",
       "unicorn/prefer-export-from": "off",
-      "unicorn/no-array-reduce": "off"
+      "unicorn/no-array-reduce": "off",
+      "jsdoc/no-undefined-types": [
+        "error",
+        {
+          "definedTypes": [
+            "ArrayLike",
+            "AsyncIterable",
+            "AsyncIterableIterator",
+            "Iterable",
+            "IterableIterator",
+            "Generator",
+            "CryptoKeyPair",
+            "NodeJS",
+            "ErrorOptions",
+            "IDBTransactionMode"
+          ]
+        }
+      ]
     },
     "env": {
       "mocha": true
diff --git a/packages/access-client/src/agent-data.js b/packages/access-client/src/agent-data.js
index 7be6bf234..4d93c21cc 100644
--- a/packages/access-client/src/agent-data.js
+++ b/packages/access-client/src/agent-data.js
@@ -1,6 +1,7 @@
 import { Signer } from '@ucanto/principal'
 import { Signer as EdSigner } from '@ucanto/principal/ed25519'
 import { importDAG } from '@ucanto/core/delegation'
+import * as Ucanto from '@ucanto/interface'
 import { DID } from '@ucanto/core'
 import { CID } from 'multiformats'
 import { Access } from '@web3-storage/capabilities'
@@ -161,16 +162,19 @@ export class AgentData {
     this.delegations.delete(cid.toString())
     await this.#save(this.export())
   }
+}
 
-  /**
-   * The current session proof.
-   */
-  sessionProof() {
-    for (const { delegation } of this.delegations.values()) {
-      const cap = delegation.capabilities.find(
-        (c) => c.can === Access.session.can // TODO we should make sure this is the current session proof - we were checking nb.key but that doesn't seem to exist in the staging ucan/attest at the moment
-      )
-      if (cap && !isExpired(delegation)) return delegation
-    }
+/**
+ * get session proof
+ *
+ * @param {AgentData} data
+ * @returns {Ucanto.Delegation | undefined}
+ */
+export function getSessionProof(data) {
+  for (const { delegation } of data.delegations.values()) {
+    const cap = delegation.capabilities.find(
+      (c) => c.can === Access.session.can // TODO we should make sure this is the current session proof - we were checking nb.key but that doesn't seem to exist in the staging ucan/attest at the moment
+    )
+    if (cap && !isExpired(delegation)) return delegation
   }
 }
diff --git a/packages/access-client/src/agent.js b/packages/access-client/src/agent.js
index 71bb95de1..5864688e2 100644
--- a/packages/access-client/src/agent.js
+++ b/packages/access-client/src/agent.js
@@ -24,7 +24,7 @@ import {
   validate,
   canDelegateCapability,
 } from './delegations.js'
-import { AgentData } from './agent-data.js'
+import { AgentData, getSessionProof } from './agent-data.js'
 
 export { AgentData }
 
@@ -269,7 +269,7 @@ export class Agent {
    */
   proofs(caps) {
     const arr = []
-    const session = this.#data.sessionProof()
+    const session = getSessionProof(this.#data)
     let hasSessionDelegations = false
 
     for (const { delegation } of this.#delegations(caps)) {