Fix sweep script crashing on locked issues

The sweep job (https://github.com/anthropics/claude-code/actions/runs/21983111029/job/63510453226)
was silently failing when closeExpired tried to comment on a locked issue,
causing a 403 from the GitHub API.

Two issues:

1. closeExpired didn't skip locked issues like markStale already does.
   Adding the same `if (issue.locked) continue` guard fixes this.

2. The error was swallowed by `main().catch(console.error)` which logs
   to stderr but exits 0, so CI reported success despite the crash.
   Replaced the main() wrapper with top-level await so unhandled errors
   properly crash the process with a non-zero exit code.

## Test plan

YOLO

.github/workflows/issue-lifecycle-comment.yml

@@ -1,27 +0,0 @@
-name: "Issue Lifecycle Comment"
-
-on:
-  issues:
-    types: [labeled]
-
-permissions:
-  issues: write
-
-jobs:
-  comment:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
-      - name: Setup Bun
-        uses: oven-sh/setup-bun@v2
-        with:
-          bun-version: latest
-
-      - name: Post lifecycle comment
-        run: bun run scripts/lifecycle-comment.ts
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          LABEL: ${{ github.event.label.name }}
-          ISSUE_NUMBER: ${{ github.event.issue.number }}

scripts/issue-lifecycle.ts

@@ -1,38 +0,0 @@
-// Single source of truth for issue lifecycle labels, timeouts, and messages.
-
-export const lifecycle = [
-  {
-    label: "invalid",
-    days: 3,
-    reason: "this doesn't appear to be about Claude Code",
-    nudge: "This doesn't appear to be about [Claude Code](https://github.com/anthropics/claude-code). For general Anthropic support, visit [support.anthropic.com](https://support.anthropic.com).",
-  },
-  {
-    label: "needs-repro",
-    days: 7,
-    reason: "we still need reproduction steps to investigate",
-    nudge: "We weren't able to reproduce this. Could you provide steps to trigger the issue — what you ran, what happened, and what you expected?",
-  },
-  {
-    label: "needs-info",
-    days: 7,
-    reason: "we still need a bit more information to move forward",
-    nudge: "We need more information to continue investigating. Can you make sure to include your Claude Code version (`claude --version`), OS, and any error messages or logs?",
-  },
-  {
-    label: "stale",
-    days: 14,
-    reason: "inactive for too long",
-    nudge: "This issue has been automatically marked as stale due to inactivity.",
-  },
-  {
-    label: "autoclose",
-    days: 14,
-    reason: "inactive for too long",
-    nudge: "This issue has been marked for automatic closure.",
-  },
-] as const;
-
-export type LifecycleLabel = (typeof lifecycle)[number]["label"];
-
-export const STALE_UPVOTE_THRESHOLD = 10;

scripts/lifecycle-comment.ts

@@ -1,53 +0,0 @@
-#!/usr/bin/env bun
-
-// Posts a comment when a lifecycle label is applied to an issue,
-// giving the author a heads-up and a chance to respond before auto-close.
-
-import { lifecycle } from "./issue-lifecycle.ts";
-
-const DRY_RUN = process.argv.includes("--dry-run");
-const token = process.env.GITHUB_TOKEN;
-const repo = process.env.GITHUB_REPOSITORY; // owner/repo
-const label = process.env.LABEL;
-const issueNumber = process.env.ISSUE_NUMBER;
-
-if (!DRY_RUN && !token) throw new Error("GITHUB_TOKEN required");
-if (!repo) throw new Error("GITHUB_REPOSITORY required");
-if (!label) throw new Error("LABEL required");
-if (!issueNumber) throw new Error("ISSUE_NUMBER required");
-
-const entry = lifecycle.find((l) => l.label === label);
-if (!entry) {
-  console.log(`No lifecycle entry for label "${label}", skipping`);
-  process.exit(0);
-}
-
-const body = `${entry.nudge} This issue will be closed automatically if there's no activity within ${entry.days} days.`;
-
-// --
-
-if (DRY_RUN) {
-  console.log(`Would comment on #${issueNumber} for label "${label}":\n\n${body}`);
-  process.exit(0);
-}
-
-const response = await fetch(
-  `https://api.github.com/repos/${repo}/issues/${issueNumber}/comments`,
-  {
-    method: "POST",
-    headers: {
-      Authorization: `Bearer ${token}`,
-      Accept: "application/vnd.github.v3+json",
-      "Content-Type": "application/json",
-      "User-Agent": "lifecycle-comment",
-    },
-    body: JSON.stringify({ body }),
-  }
-);
-
-if (!response.ok) {
-  const text = await response.text();
-  throw new Error(`GitHub API ${response.status}: ${text}`);
-}
-
-console.log(`Commented on #${issueNumber} for label "${label}"`);

scripts/sweep.ts

@@ -1,15 +1,23 @@
 #!/usr/bin/env bun
 
-import { lifecycle, STALE_UPVOTE_THRESHOLD } from "./issue-lifecycle.ts";
-
 // --
 
 const NEW_ISSUE = "https://github.com/anthropics/claude-code/issues/new/choose";
 const DRY_RUN = process.argv.includes("--dry-run");
+const STALE_DAYS = 14;
+const STALE_UPVOTE_THRESHOLD = 10;
 
 const CLOSE_MESSAGE = (reason: string) =>
   `Closing for now — ${reason}. Please [open a new issue](${NEW_ISSUE}) if this is still relevant.`;
 
+const lifecycle = [
+  { label: "invalid",     days: 3,  reason: "this doesn't appear to be about Claude Code" },
+  { label: "needs-repro", days: 7,  reason: "we still need reproduction steps to investigate" },
+  { label: "needs-info",  days: 7,  reason: "we still need a bit more information to move forward" },
+  { label: "stale",       days: 14, reason: "inactive for too long" },
+  { label: "autoclose",   days: 14, reason: "inactive for too long" },
+];
+
 // --
 
 async function githubRequest<T>(
@@ -43,13 +51,12 @@ async function githubRequest<T>(
 // --
 
 async function markStale(owner: string, repo: string) {
-  const staleDays = lifecycle.find((l) => l.label === "stale")!.days;
   const cutoff = new Date();
-  cutoff.setDate(cutoff.getDate() - staleDays);
+  cutoff.setDate(cutoff.getDate() - STALE_DAYS);
 
   let labeled = 0;
 
-  console.log(`\n=== marking stale (${staleDays}d inactive) ===`);
+  console.log(`\n=== marking stale (${STALE_DAYS}d inactive) ===`);
 
   for (let page = 1; page <= 10; page++) {
     const issues = await githubRequest<any[]>(