Drop the trailing-slash guide redirects that never match

On the preview, /debate-weighing-guide/ gets the trailingSlash 308 to
/debate-weighing-guide before any redirect rule runs, then the 301 to
/how-to-weigh-in-debate. The /<slug>/ rules never fire, so remove
them and say in operations.md how slash URLs reach the survivor.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: Programcode

docs/operations.md

@@ -44,7 +44,7 @@ Vercel builds and serves the frontend from the Git repository. Merging to `main`
 - rewrites of the app routes (`/app`, `/login`, `/share`, `/expocit/sources`) to `app-shell.html`; any other path that is not a file gets `404.html` with a real 404 status;
 - `trailingSlash: false`, which 308-redirects `/app/settings/` to `/app/settings` before routing, since rewrite and redirect sources match exactly;
 - 301 redirects from the retired brand pages (`/debatelab`, `/debatelab-by-programcode`, and the rest) to `/`;
-- 301 redirects from retired guide slugs to the guide that replaced them, such as `/debate-weighing-guide` to `/how-to-weigh-in-debate`, one rule each for the path with and without a trailing slash;
+- 301 redirects from retired guide slugs to the guide that replaced them, such as `/debate-weighing-guide` to `/how-to-weigh-in-debate`. The `trailingSlash` 308 runs first, so `/debate-weighing-guide/` reaches the same page in two permanent hops and needs no rule of its own;
 - no-cache headers for `/`, `index.html`, `app-shell.html`, `theme-init.js`, and `sw.js`, and immutable caching for hashed `/assets/`;
 - `noindex` headers for `/app`, `/login`, and `/share` routes;
 - Content Security Policy and the other response security headers, including the `Permissions-Policy` that allows the microphone for the app's own origin only.

src/test/vercel-deployment-config.test.ts

@@ -60,7 +60,7 @@ describe("Vercel frontend deployment configuration", () => {
 
   it("redirects each retired guide to a live guide that no page links past", () => {
     const guideRedirects = (loadConfig().redirects ?? []).filter((rule) => !rule.source.startsWith("/:page("));
-    const retired = new Set(guideRedirects.map((rule) => rule.source.replace(/\/$/, "")));
+    const retired = new Set(guideRedirects.map((rule) => rule.source));
     const pages = readdirSync(resolve(process.cwd(), "public"), { withFileTypes: true })
       .filter((entry) => entry.isDirectory() && existsSync(resolve(process.cwd(), "public", entry.name, "index.html")))
       .map((entry) => `/${entry.name}`);

vercel.json

@@ -25,130 +25,65 @@
       "destination": "/online-debate-timer",
       "statusCode": 301
     },
-    {
-      "source": "/online-debate-timer-tool/",
-      "destination": "/online-debate-timer",
-      "statusCode": 301
-    },
     {
       "source": "/debate-argument-flowchart-tool",
       "destination": "/argument-flowchart",
       "statusCode": 301
     },
-    {
-      "source": "/debate-argument-flowchart-tool/",
-      "destination": "/argument-flowchart",
-      "statusCode": 301
-    },
     {
       "source": "/debate-weighing-guide",
       "destination": "/how-to-weigh-in-debate",
       "statusCode": 301
     },
-    {
-      "source": "/debate-weighing-guide/",
-      "destination": "/how-to-weigh-in-debate",
-      "statusCode": 301
-    },
     {
       "source": "/debate-impact-calculus",
       "destination": "/how-to-weigh-in-debate",
       "statusCode": 301
     },
-    {
-      "source": "/debate-impact-calculus/",
-      "destination": "/how-to-weigh-in-debate",
-      "statusCode": 301
-    },
     {
       "source": "/debate-cross-examination-tips",
       "destination": "/how-to-cross-examine-in-debate",
       "statusCode": 301
     },
-    {
-      "source": "/debate-cross-examination-tips/",
-      "destination": "/how-to-cross-examine-in-debate",
-      "statusCode": 301
-    },
     {
       "source": "/debate-note-taking-flowing",
       "destination": "/how-to-flow-in-debate",
       "statusCode": 301
     },
-    {
-      "source": "/debate-note-taking-flowing/",
-      "destination": "/how-to-flow-in-debate",
-      "statusCode": 301
-    },
     {
       "source": "/debate-case-generator",
       "destination": "/ai-debate-case-generator",
       "statusCode": 301
     },
-    {
-      "source": "/debate-case-generator/",
-      "destination": "/ai-debate-case-generator",
-      "statusCode": 301
-    },
     {
       "source": "/how-to-write-a-rebuttal-speech",
       "destination": "/how-to-practice-rebuttals",
       "statusCode": 301
     },
-    {
-      "source": "/how-to-write-a-rebuttal-speech/",
-      "destination": "/how-to-practice-rebuttals",
-      "statusCode": 301
-    },
     {
       "source": "/wsdc-debate-practice",
       "destination": "/world-schools-debate",
       "statusCode": 301
     },
-    {
-      "source": "/wsdc-debate-practice/",
-      "destination": "/world-schools-debate",
-      "statusCode": 301
-    },
     {
       "source": "/ai-debate-evidence-research",
       "destination": "/debate-evidence-finder",
       "statusCode": 301
     },
-    {
-      "source": "/ai-debate-evidence-research/",
-      "destination": "/debate-evidence-finder",
-      "statusCode": 301
-    },
     {
       "source": "/debate-evidence-verification",
       "destination": "/debate-evidence-finder",
       "statusCode": 301
     },
-    {
-      "source": "/debate-evidence-verification/",
-      "destination": "/debate-evidence-finder",
-      "statusCode": 301
-    },
     {
       "source": "/debatelab-alternatives",
       "destination": "/best-ai-debate-tools",
       "statusCode": 301
     },
-    {
-      "source": "/debatelab-alternatives/",
-      "destination": "/best-ai-debate-tools",
-      "statusCode": 301
-    },
     {
       "source": "/ai-tools-for-debate-students",
       "destination": "/best-ai-debate-tools",
       "statusCode": 301
-    },
-    {
-      "source": "/ai-tools-for-debate-students/",
-      "destination": "/best-ai-debate-tools",
-      "statusCode": 301
     }
   ],
   "rewrites": [