Recognize sign-in failures for every agent and fall through (#19)

Co-authored-by: Danny Kim <temeddix@gmail.com>
Co-committed-by: Danny Kim <temeddix@gmail.com>

src/post.ts

@@ -4,7 +4,12 @@ import {
   type RuntimeManifest,
   type RuntimeOutcome,
 } from "./runtime.ts";
-import { withProfile } from "./profiles.ts";
+import {
+  failureFooter,
+  type FailureReason,
+  type ProfileFailure,
+  withProfile,
+} from "./profiles.ts";
 
 export type PostContext = {
   apiUrl: string;
@@ -26,7 +31,10 @@ const VERDICTS: Record<string, [event: string, mark: string]> = {
   Approved: ["APPROVED", "✅"],
   "Changes requested": ["REQUEST_CHANGES", "🛑"],
 };
-const FAILURE = "AI bot failed.\n\n> Profile: none · all profiles failed";
+const PROFILE_TYPES = ["claude", "codex", "opencode"];
+const FAILURE_REASONS = ["sign-in failed", "usage exhausted", "failed"];
+const failureComment = (failures: ProfileFailure[]): string =>
+  `AI bot failed.\n\n${failureFooter(failures)}`;
 
 class GiteaRequestError extends Error {}
 
@@ -61,7 +69,28 @@ async function readOutcome(path: string): Promise<RuntimeOutcome> {
     throw new Error("invalid agent outcome");
   }
   const outcome = value as Record<string, unknown>;
-  if (outcome.ok === false) return { ok: false };
+  if (outcome.ok === false) {
+    // Only known labels reach the comment, never raw agent output.
+    const failures = Array.isArray(outcome.failures) ? outcome.failures : [];
+    return {
+      ok: false,
+      failures: failures.flatMap((entry: unknown) => {
+        const { type, model, reason } = (entry ?? {}) as Record<
+          string,
+          unknown
+        >;
+        return typeof type === "string" && PROFILE_TYPES.includes(type) &&
+            typeof model === "string" && typeof reason === "string" &&
+            FAILURE_REASONS.includes(reason)
+          ? [{
+            type: type as ProfileFailure["type"],
+            model,
+            reason: reason as FailureReason,
+          }]
+          : [];
+      }),
+    };
+  }
   if (
     outcome.ok !== true || typeof outcome.body !== "string" ||
     typeof outcome.reviewPath !== "string" ||
@@ -152,11 +181,11 @@ export async function postRuntime(
     try {
       outcome = await readOutcome(manifest.outcomeFile);
     } catch (error) {
-      await postComment(FAILURE);
+      await postComment(failureComment([]));
       throw new Error("agent phase failed", { cause: error });
     }
     if (!outcome.ok) {
-      await postComment(FAILURE);
+      await postComment(failureComment(outcome.failures));
       throw new Error("agent phase failed");
     }
 
@@ -208,7 +237,9 @@ export async function postRuntime(
       });
     } catch (error) {
       if (error instanceof GiteaRequestError) throw error;
-      await postComment(FAILURE);
+      await postComment(
+        failureComment([{ ...outcome.profile, reason: "failed" }]),
+      );
       throw error;
     }
   } finally {