diff --git a/frontends/nextjs/src/lib/github/download-job-logs-archive.ts b/frontends/nextjs/src/lib/github/download-job-logs-archive.ts
new file mode 100644
index 000000000..c8fc485f4
--- /dev/null
+++ b/frontends/nextjs/src/lib/github/download-job-logs-archive.ts
@@ -0,0 +1,34 @@
+import type { Octokit } from 'octokit'
+
+export async function downloadJobLogsArchive(options: {
+  client: Octokit
+  owner: string
+  repo: string
+  jobId: number
+}) {
+  const response = await options.client.request(
+    'GET /repos/{owner}/{repo}/actions/jobs/{job_id}/logs',
+    {
+      owner: options.owner,
+      repo: options.repo,
+      job_id: options.jobId,
+      request: { redirect: 'manual' },
+    }
+  )
+
+  const location = response.headers.location
+  if (!location) {
+    const error = new Error('GitHub did not return a log archive location')
+    ;(error as Error & { status?: number }).status = 502
+    throw error
+  }
+
+  const archiveResponse = await fetch(location)
+  if (!archiveResponse.ok) {
+    const error = new Error(`Failed to download log archive (${archiveResponse.status})`)
+    ;(error as Error & { status?: number }).status = archiveResponse.status
+    throw error
+  }
+
+  return archiveResponse.arrayBuffer()
+}
diff --git a/frontends/nextjs/src/lib/github/extract-job-logs.ts b/frontends/nextjs/src/lib/github/extract-job-logs.ts
new file mode 100644
index 000000000..7d1772bcc
--- /dev/null
+++ b/frontends/nextjs/src/lib/github/extract-job-logs.ts
@@ -0,0 +1,23 @@
+import JSZip from 'jszip'
+
+export async function extractJobLogs(archive: ArrayBuffer) {
+  const zip = await JSZip.loadAsync(archive)
+  const files = Object.keys(zip.files)
+  const sections: string[] = []
+
+  for (const fileName of files) {
+    const entry = zip.files[fileName]
+    if (entry.dir) {
+      continue
+    }
+    const content = await entry.async('string')
+    sections.push(`----- ${fileName} -----`)
+    sections.push(content)
+  }
+
+  if (sections.length === 0) {
+    return '[No log output found in archive]'
+  }
+
+  return sections.join('\n')
+}