Restore helper layout in auth, isolation, runtime, and profiles from main

src/post.ts

@@ -5,8 +5,8 @@ import process from "node:process";
 
 import { isNotFound } from "./errors.ts";
 import { isObject } from "./json.ts";
-import { failureFooter, isFailureReason, isProfileType, withProfile } from "./profiles.ts";
-import type { ProfileFailure } from "./profiles.ts";
+import { failureFooter, withProfile } from "./profiles.ts";
+import type { FailureReason, ProfileFailure } from "./profiles.ts";
 import { readRuntimeManifest } from "./runtime.ts";
 import type { RuntimeManifest, RuntimeOutcome } from "./runtime.ts";
 
@@ -30,6 +30,10 @@ const VERDICTS: Record<string, [event: string, mark: string]> = {
   Approved: ["APPROVED", "✅"],
   "Changes requested": ["REQUEST_CHANGES", "🛑"],
 };
+const PROFILE_TYPES: Set<unknown> = new Set(["claude", "codex", "opencode"]);
+const FAILURE_REASONS: Set<unknown> = new Set(["sign-in failed", "usage exhausted", "failed"]);
+const isProfileType = (value: unknown): value is ProfileFailure["type"] => PROFILE_TYPES.has(value);
+const isFailureReason = (value: unknown): value is FailureReason => FAILURE_REASONS.has(value);
 const failureComment = (failures: ProfileFailure[]): string =>
   `AI bot failed.\n\n${failureFooter(failures)}`;