diff --git a/http-client/index.ts b/http-client/index.ts
index 1ea25a7d0..d2b0bf9a4 100644
--- a/http-client/index.ts
+++ b/http-client/index.ts
@@ -9,6 +9,7 @@ import type {
   TreeStats,
 } from "./lib/project.js";
 import type {
+  Author,
   Config,
   SeedingPolicy,
   DefaultSeedingPolicy,
@@ -50,6 +51,7 @@ import {
 } from "./lib/shared.js";
 
 export type {
+  Author,
   BaseUrl,
   Blob,
   ChangesetWithDiff,
diff --git a/http-client/lib/project.ts b/http-client/lib/project.ts
index 6dab8fc80..39249e4ac 100644
--- a/http-client/lib/project.ts
+++ b/http-client/lib/project.ts
@@ -26,6 +26,7 @@ import {
 } from "./project/commit.js";
 import { issueSchema, issuesSchema } from "./project/issue.js";
 import { patchSchema, patchesSchema } from "./project/patch.js";
+import { authorSchema } from "./shared.js";
 
 const repoSchema = object({
   rid: string(),
@@ -34,7 +35,7 @@ const repoSchema = object({
     description: string(),
     defaultBranch: string(),
   }),
-  delegates: array(object({ id: string(), alias: optional(string()) })),
+  delegates: array(authorSchema),
   head: string(),
   threshold: number(),
   visibility: union([
diff --git a/http-client/lib/shared.ts b/http-client/lib/shared.ts
index b9e96dbd2..9c9e36fa8 100644
--- a/http-client/lib/shared.ts
+++ b/http-client/lib/shared.ts
@@ -117,6 +117,8 @@ export const codeLocationSchema = object({
   new: rangeSchema.nullable(),
 });
 
+export type Author = z.infer<typeof authorSchema>;
+
 export const authorSchema = object({
   id: string(),
   alias: string().optional(),
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index 6c130c02b..506106bba 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -1,4 +1,4 @@
-import type { BaseUrl } from "@http-client";
+import type { Author, BaseUrl } from "@http-client";
 
 import md5 from "md5";
 import bs58 from "bs58";
@@ -80,10 +80,7 @@ export function formatCommit(oid: string): string {
   return oid.substring(0, 7);
 }
 
-export function formatEditedCaption(
-  author: { id: string; alias?: string },
-  timestamp: number,
-) {
+export function formatEditedCaption(author: Author, timestamp: number) {
   return `${
     author.alias ? author.alias : formatNodeId(author.id)
   } edited ${absoluteTimestamp(timestamp)}`;
diff --git a/src/views/projects/Cob/Revision.svelte b/src/views/projects/Cob/Revision.svelte
index 4f9cf7296..ef5aee26f 100644
--- a/src/views/projects/Cob/Revision.svelte
+++ b/src/views/projects/Cob/Revision.svelte
@@ -1,5 +1,6 @@
 <script lang="ts">
   import type {
+    Author,
     BaseUrl,
     Comment,
     DiffResponse,
@@ -44,7 +45,7 @@
   export let revisionOid: string;
   export let revisionTimestamp: number;
   export let revisionReactions: Comment["reactions"];
-  export let revisionAuthor: { id: string; alias?: string | undefined };
+  export let revisionAuthor: Author;
   export let revisionDescription: string;
   export let timelines: Timeline[];
   export let previousRevBase: string | undefined = undefined;
diff --git a/src/views/projects/Patch.svelte b/src/views/projects/Patch.svelte
index 17aabf2e5..cd156aaec 100644
--- a/src/views/projects/Patch.svelte
+++ b/src/views/projects/Patch.svelte
@@ -1,5 +1,6 @@
 <script lang="ts" context="module">
   import type {
+    Author,
     Comment,
     Review,
     Merge,
@@ -168,7 +169,7 @@
         revisionOid: string;
         revisionEdits: Revision["edits"];
         revisionReactions: Revision["reactions"];
-        revisionAuthor: { id: string; alias?: string | undefined };
+        revisionAuthor: Author;
         revisionDescription: string;
       },
       Timeline[],