diff --git a/api/lib/local_ipc.ts b/api/lib/local_ipc.ts
index 45e6ab3..bdfda62 100644
--- a/api/lib/local_ipc.ts
+++ b/api/lib/local_ipc.ts
@@ -74,6 +74,8 @@ const commands: Record<
           teamId: 'local',
           isPublic: true,
           repositoryUrl: null,
+          discordChannelId: null,
+          jiraProjectKey: null,
         })
       }
 
diff --git a/api/routes.ts b/api/routes.ts
index 5262035..c408874 100644
--- a/api/routes.ts
+++ b/api/routes.ts
@@ -188,6 +188,8 @@ const projectOutput = OBJ({
   teamId: STR('The ID of the team that owns the project'),
   isPublic: BOOL('Is the project public?'),
   repositoryUrl: optional(STR('The URL of the project repository')),
+  jiraProjectKey: optional(STR('The Jira project key, e.g. "TNT"')),
+  discordChannelId: optional(STR('The ID of the project Discord channel')),
   createdAt: optional(NUM('The creation date of the project')),
   updatedAt: optional(NUM('The last update date of the project')),
 })
@@ -349,6 +351,10 @@ const defs = {
       teamId: STR('The ID of the team that owns the project'),
       isPublic: BOOL('Is the project public?'),
       repositoryUrl: optional(STR('The URL of the project repository')),
+      jiraProjectKey: optional(STR('The Jira project key, e.g. "TNT"')),
+      discordChannelId: optional(
+        STR('The ID of the project Discord channel'),
+      ),
     }, 'Create a new project'),
     output: projectOutput,
     description: 'Create a new project',
@@ -375,6 +381,10 @@ const defs = {
       teamId: STR('The ID of the team that owns the project'),
       isPublic: BOOL('Is the project public?'),
       repositoryUrl: optional(STR('The URL of the project repository')),
+      jiraProjectKey: optional(STR('The Jira project key, e.g. "TNT"')),
+      discordChannelId: optional(
+        STR('The ID of the project Discord channel'),
+      ),
     }),
     output: projectOutput,
     description: 'Update a project by ID',
diff --git a/api/schema.ts b/api/schema.ts
index 4ccd606..f575b94 100644
--- a/api/schema.ts
+++ b/api/schema.ts
@@ -50,6 +50,8 @@ export const ProjectDef = OBJ({
   teamId: STR('The ID of the team that owns the project'),
   isPublic: BOOL('Is the project public?'),
   repositoryUrl: optional(STR('The URL of the project repository')),
+  jiraProjectKey: optional(STR('The Jira project key, e.g. "TNT"')),
+  discordChannelId: optional(STR('The ID of the project Discord channel')),
 }, 'The project schema definition')
 export type Project = Asserted<typeof ProjectDef>
 
diff --git a/api/team-directory.ts b/api/team-directory.ts
new file mode 100644
index 0000000..2b1b0ad
--- /dev/null
+++ b/api/team-directory.ts
@@ -0,0 +1,101 @@
+import { get } from './lmdb-store.ts'
+
+// Matches the `Person` shape from tickets.ts (issue 1, a separate branch as
+// of this issue) — duplicated rather than imported since this issue has no
+// dependency on it.
+export type Person = {
+  id: string
+  name: string
+  emails: string[]
+  githubLogin?: string
+  discordId?: string
+  jiraAccountId?: string
+}
+
+type GoogleUser = {
+  id: string
+  primaryEmail: string
+  emails: string[]
+  name: string
+}
+
+type JiraUser = {
+  accountId: string
+  email: string | null
+}
+
+// `name`/`global_name` come back as `[]`, not `null`, when unset on some
+// store records (an upstream sync quirk) — typed loosely and guarded with
+// `typeof` rather than trusted.
+type GithubUser = {
+  login: string
+  name: unknown
+}
+
+type DiscordUser = {
+  id: string
+  global_name: unknown
+}
+
+const GOOGLE_USER_QUERY =
+  '{id: .id, primaryEmail: .primaryEmail, emails: [.emails[]?.address], name: .name.fullName}'
+const JIRA_USER_QUERY = '{accountId: .accountId, email: .emailAddress}'
+const GITHUB_USER_QUERY = '{login: .login, name: .name}'
+const DISCORD_USER_QUERY = '{id: .id, global_name: .global_name}'
+
+// github/user and discord/user carry no email to join against google/user
+// by, so this falls back to an exact, case-insensitive full-name match —
+// the only signal shared with google/user's `name.fullName`. A name shared
+// by more than one account is dropped rather than guessed at (e.g. two
+// real github accounts both just named "Henri").
+const uniqueByName = <T>(
+  items: T[],
+  getName: (item: T) => unknown,
+): Map<string, T> => {
+  const byName = new Map<string, T>()
+  const ambiguous = new Set<string>()
+  for (const item of items) {
+    const name = getName(item)
+    if (typeof name !== 'string' || !name) continue
+    const key = name.toLowerCase()
+    if (byName.has(key)) ambiguous.add(key)
+    else byName.set(key, item)
+  }
+  for (const key of ambiguous) byName.delete(key)
+  return byName
+}
+
+export const mergeTeamDirectory = (
+  googleUsers: GoogleUser[],
+  jiraUsers: JiraUser[],
+  githubUsers: GithubUser[],
+  discordUsers: DiscordUser[],
+): Person[] => {
+  const githubByName = uniqueByName(githubUsers, (u) => u.name)
+  const discordByName = uniqueByName(discordUsers, (u) => u.global_name)
+
+  return googleUsers.map((user) => {
+    const emails = [...new Set([user.primaryEmail, ...user.emails])]
+    const jiraUser = jiraUsers.find((j) => j.email && emails.includes(j.email))
+    const nameKey = user.name.toLowerCase()
+    return {
+      id: user.id,
+      name: user.name,
+      emails,
+      jiraAccountId: jiraUser?.accountId,
+      githubLogin: githubByName.get(nameKey)?.login,
+      discordId: discordByName.get(nameKey)?.id,
+    }
+  })
+}
+
+export const buildTeamDirectory = async (): Promise<Person[]> => {
+  const [googleUsers, jiraUsers, githubUsers, discordUsers] = await Promise
+    .all([
+      get<GoogleUser[]>('google/user', { q: GOOGLE_USER_QUERY }),
+      get<JiraUser[]>('jira/user', { q: JIRA_USER_QUERY }),
+      get<GithubUser[]>('github/user', { q: GITHUB_USER_QUERY }),
+      get<DiscordUser[]>('discord/user', { q: DISCORD_USER_QUERY }),
+    ])
+  return mergeTeamDirectory(googleUsers, jiraUsers, githubUsers, discordUsers)
+}
diff --git a/tasks/seed.ts b/tasks/seed.ts
index d82c845..f62f7e5 100644
--- a/tasks/seed.ts
+++ b/tasks/seed.ts
@@ -12,6 +12,8 @@ const projects: Omit<Project, 'createdAt'>[] = [
     teamId: 'frontend-devs',
     isPublic: true,
     repositoryUrl: 'https://github.com/example/website',
+    discordChannelId: null,
+    jiraProjectKey: null,
   },
   {
     slug: 'api-refactor',
@@ -19,6 +21,8 @@ const projects: Omit<Project, 'createdAt'>[] = [
     teamId: 'backend-devs',
     isPublic: false,
     repositoryUrl: 'https://github.com/example/api',
+    discordChannelId: null,
+    jiraProjectKey: null,
   },
   {
     slug: 'design-system',
@@ -26,6 +30,8 @@ const projects: Omit<Project, 'createdAt'>[] = [
     teamId: 'frontend-devs',
     isPublic: true,
     repositoryUrl: 'https://github.com/example/design-system',
+    discordChannelId: null,
+    jiraProjectKey: null,
   },
 ]
 
diff --git a/web/pages/ProjectsPage.tsx b/web/pages/ProjectsPage.tsx
index 12312b0..278b537 100644
--- a/web/pages/ProjectsPage.tsx
+++ b/web/pages/ProjectsPage.tsx
@@ -63,6 +63,8 @@ async function saveProject(
       teamId,
       repositoryUrl,
       isPublic: isPublic ?? false,
+      discordChannelId: null,
+      jiraProjectKey: null,
     })
     projects.fetch()
     navigate({ params: { dialog: null, slug: null }, replace: true })