doctor: clarify orphan transcript archive prompt

src/commands/doctor-state-integrity.test.ts

@@ -145,13 +145,16 @@ describe("doctor state integrity oauth dir checks", () => {
     const sessionsDir = resolveSessionTranscriptsDirForAgent("main", process.env, () => tempHome);
     fs.writeFileSync(path.join(sessionsDir, "orphan-session.jsonl"), '{"type":"session"}\n');
     const confirmSkipInNonInteractive = vi.fn(async (params: { message: string }) =>
-      params.message.includes("orphan transcript file"),
+      params.message.includes("This only renames them to *.deleted.<timestamp>."),
     );
     await noteStateIntegrity(cfg, { confirmSkipInNonInteractive });
-    expect(stateIntegrityText()).toContain("orphan transcript file");
+    expect(stateIntegrityText()).toContain(
+      "These .jsonl files are no longer referenced by sessions.json",
+    );
+    expect(stateIntegrityText()).toContain("Examples: orphan-session.jsonl");
     expect(confirmSkipInNonInteractive).toHaveBeenCalledWith(
       expect.objectContaining({
-        message: expect.stringContaining("orphan transcript file"),
+        message: expect.stringContaining("This only renames them to *.deleted.<timestamp>."),
       }),
     );
     const files = fs.readdirSync(sessionsDir);

src/commands/doctor-state-integrity.ts

@@ -27,6 +27,19 @@ type DoctorPrompterLike = {
   }) => Promise<boolean>;
 };
 
+function countLabel(count: number, singular: string, plural = `${singular}s`): string {
+  return `${count} ${count === 1 ? singular : plural}`;
+}
+
+function formatFilePreview(paths: string[], limit = 3): string {
+  const names = paths.slice(0, limit).map((filePath) => path.basename(filePath));
+  const remaining = paths.length - names.length;
+  if (remaining > 0) {
+    return `${names.join(", ")}, and ${remaining} more`;
+  }
+  return names.join(", ");
+}
+
 function existsDir(dir: string): boolean {
   try {
     return fs.existsSync(dir) && fs.statSync(dir).isDirectory();
@@ -770,11 +783,18 @@ export async function noteStateIntegrity(
       .map((entry) => path.resolve(path.join(sessionsDir, entry.name)))
       .filter((filePath) => !referencedTranscriptPaths.has(filePath));
     if (orphanTranscriptPaths.length > 0) {
+      const orphanCount = countLabel(orphanTranscriptPaths.length, "orphan transcript file");
+      const orphanPreview = formatFilePreview(orphanTranscriptPaths);
       warnings.push(
-        `- Found ${orphanTranscriptPaths.length} orphan transcript file(s) in ${displaySessionsDir}. They are not referenced by sessions.json and can consume disk over time.`,
+        [
+          `- Found ${orphanCount} in ${displaySessionsDir}.`,
+          "  These .jsonl files are no longer referenced by sessions.json, so they are not part of any active session history.",
+          "  Doctor can archive them safely by renaming each file to *.deleted.<timestamp>.",
+          `  Examples: ${orphanPreview}`,
+        ].join("\n"),
       );
       const archiveOrphans = await prompter.confirmSkipInNonInteractive({
-        message: `Archive ${orphanTranscriptPaths.length} orphan transcript file(s) in ${displaySessionsDir}?`,
+        message: `Archive ${orphanCount} in ${displaySessionsDir}? This only renames them to *.deleted.<timestamp>.`,
         initialValue: false,
       });
       if (archiveOrphans) {
@@ -792,7 +812,9 @@ export async function noteStateIntegrity(
           }
         }
         if (archived > 0) {
-          changes.push(`- Archived ${archived} orphan transcript file(s) in ${displaySessionsDir}`);
+          changes.push(
+            `- Archived ${countLabel(archived, "orphan transcript file")} in ${displaySessionsDir} as .deleted timestamped backups.`,
+          );
         }
       }
     }