diff --git a/api/jira-provider.test.ts b/api/jira-provider.test.ts
new file mode 100644
index 0000000..8329298
--- /dev/null
+++ b/api/jira-provider.test.ts
@@ -0,0 +1,100 @@
+import { assertEquals } from '@std/assert'
+import { describe, it } from '@std/testing/bdd'
+import { createJiraProvider } from './jira-provider.ts'
+
+const issue = {
+  id: '10001',
+  key: 'TNT-393',
+  Project: {
+    id: '10017',
+    key: 'TNT',
+    name: 'Tournament',
+  },
+  Summary: 'Hide settings for no admin tournament user',
+  Status: {
+    name: 'Done',
+  },
+  Updated: '2026-01-02T12:00:00.000Z',
+  Created: '2026-01-01T12:00:00.000Z',
+  Description: 'The settings tab should not be visible to non-admin users.',
+  Assignee: {
+    accountId: 'jira-account-1',
+    emailAddress: 'ada@example.com',
+    displayName: 'Ada Lovelace',
+  },
+  Comment: {
+    comments: [
+      {
+        body: 'Implemented in the tournament frontend.',
+        author: {
+          accountId: 'jira-account-2',
+          emailAddress: 'grace@example.com',
+          displayName: 'Grace Hopper',
+        },
+        created: '2026-01-02T10:00:00.000Z',
+      },
+    ],
+  },
+}
+
+describe('jiraProvider', () => {
+  it('lists issues scoped by Jira project and maps the assignee', async () => {
+    let receivedParams: { q?: string } = {}
+    const provider = createJiraProvider((_path, params) => {
+      receivedParams = params ?? {}
+      return Promise.resolve([issue])
+    })
+
+    const items = await provider.list({ jiraProjectKey: 'TNT' })
+
+    assertEquals(receivedParams.q, `select(.Project.key == "TNT") | {
+        id,
+        key,
+        Summary,
+        Status: {
+          name: .Status.name,
+          iconUrl: .Status.iconUrl
+        },
+        Updated,
+        Assignee: {
+          accountId: .Assignee.accountId,
+          emailAddress: .Assignee.emailAddress
+        }
+      }`)
+    assertEquals(items.length, 1)
+    assertEquals(items[0].externalId, '10001')
+    assertEquals(items[0].title, issue.Summary)
+    assertEquals(items[0].status, issue.Status.name)
+    assertEquals(items[0].assigneeRefs, [{
+      jiraAccountId: 'jira-account-1',
+      email: 'ada@example.com',
+    }])
+  })
+
+  it('returns no records when the project scope is absent', async () => {
+    let called = false
+    const provider = createJiraProvider(() => {
+      called = true
+      return Promise.resolve([issue])
+    })
+
+    assertEquals(await provider.list({}), [])
+    assertEquals(called, false)
+  })
+
+  it('returns description first, followed by Jira comments', async () => {
+    const provider = createJiraProvider(() => Promise.resolve([issue]))
+    const [item] = await provider.list({ jiraProjectKey: 'TNT' })
+    const discussion = await provider.comments(item)
+
+    assertEquals(discussion.map((comment) => comment.body), [
+      issue.Description,
+      'Implemented in the tournament frontend.',
+    ])
+    assertEquals(discussion[1].author, 'grace@example.com')
+    assertEquals(
+      discussion[1].createdAt,
+      Date.parse('2026-01-02T10:00:00.000Z'),
+    )
+  })
+})
diff --git a/api/jira-provider.ts b/api/jira-provider.ts
new file mode 100644
index 0000000..09a239f
--- /dev/null
+++ b/api/jira-provider.ts
@@ -0,0 +1,174 @@
+import { get } from './lmdb-store.ts'
+import type {
+  Comment,
+  PersonRef,
+  ProjectScope,
+  Provider,
+  WorkItem,
+} from './tickets.ts'
+
+type JiraUser = {
+  accountId?: string
+  emailAddress?: string | null
+}
+
+type JiraStatus = {
+  name?: string
+  iconUrl?: string
+} | null
+
+type JiraText = string | Record<string, unknown>
+
+type JiraComment = {
+  body?: JiraText
+  author?: JiraUser | null
+  created?: string
+}
+
+type JiraIssue = {
+  id?: string
+  key?: string
+  Project?: {
+    key?: string
+  } | null
+
+  Summary?: string | null
+  Status?: JiraStatus
+  Updated?: string
+  Created?: string
+  Description?: JiraText | null
+  Assignee?: JiraUser | null
+  Comment?: {
+    comments?: JiraComment[]
+  } | null
+}
+
+type StoreGet = (
+  path: string,
+  params?: { q?: string },
+) => Promise<JiraIssue[]>
+
+const jiraUserRef = (
+  user: JiraUser | null | undefined,
+): PersonRef | undefined => {
+  if (!user?.accountId && !user?.emailAddress) return undefined
+  return {
+    jiraAccountId: user.accountId,
+    email: user.emailAddress ?? undefined,
+  }
+}
+
+const toWorkItem = (issue: JiraIssue): WorkItem | undefined => {
+  if (!issue.id || !issue.key) return undefined
+
+  const assignee = jiraUserRef(issue.Assignee)
+  return {
+    source: 'jira',
+    externalId: issue.id,
+    externalUrl: issue.Status?.iconUrl
+      ? `${new URL(issue.Status.iconUrl).origin}/browse/${
+        encodeURIComponent(issue.key)
+      }`
+      : `/browse/${encodeURIComponent(issue.key)}`,
+    title: issue.Summary ?? issue.key,
+    status: typeof issue.Status === 'string'
+      ? issue.Status
+      : issue.Status?.name,
+    updatedAt: issue.Updated ? Date.parse(issue.Updated) : undefined,
+    assigneeRefs: assignee ? [assignee] : [],
+    raw: issue,
+  }
+}
+
+const toComment = (
+  item: WorkItem,
+  body: JiraText | null | undefined,
+  author: JiraUser | null | undefined,
+  created: string | undefined,
+): Comment | undefined => {
+  if (typeof body !== 'string' || !body) return undefined
+  return {
+    source: 'jira',
+    author: author?.emailAddress ?? undefined,
+    body,
+    url: item.externalUrl,
+    createdAt: created ? Date.parse(created) : undefined,
+  }
+}
+
+export const createJiraProvider = (
+  storeGet: StoreGet = (path, params) => get<JiraIssue[]>(path, params),
+): Provider => ({
+  id: 'jira',
+
+  async list(scope: ProjectScope): Promise<WorkItem[]> {
+    if (!scope.jiraProjectKey) return []
+    const issues = await storeGet('jira/issue', {
+      q: `select(.Project.key == "${scope.jiraProjectKey}") | {
+        id,
+        key,
+        Summary,
+        Status: {
+          name: .Status.name,
+          iconUrl: .Status.iconUrl
+        },
+        Updated,
+        Assignee: {
+          accountId: .Assignee.accountId,
+          emailAddress: .Assignee.emailAddress
+        }
+      }`,
+    })
+    const items: WorkItem[] = []
+    for (const issue of issues) {
+      const item = toWorkItem(issue)
+      if (item) items.push(item)
+    }
+    return items
+  },
+
+  async comments(item: WorkItem): Promise<Comment[]> {
+    const issues = await storeGet('jira/issue', {
+      q: `select(.id == "${item.externalId}") | {
+        id,
+        key,
+        Summary,
+        Created,
+        Description,
+        Comment: {
+          comments: ((.Comment.comments // []) | map({
+            body,
+            created,
+            author: { emailAddress: .author.emailAddress }
+          }))
+        }
+      }`,
+    })
+    
+    if (issues.length === 0 || !issues[0]) return []
+    const issue = issues[0]
+
+    const comments: Comment[] = []
+    const description = toComment(
+      item,
+      issue.Description,
+      undefined,
+      issue.Created,
+    )
+    if (description) comments.push(description)
+
+    for (const record of issue.Comment?.comments ?? []) {
+      const comment = toComment(
+        item,
+        record.body,
+        record.author,
+        record.created,
+      )
+      if (comment) comments.push(comment)
+    }
+
+    return comments
+  },
+})
+
+export const jiraProvider = createJiraProvider()