A poster tag of 4+ words may share one with the stem

"German Board - [Usenet4ever.info] und [SecretUsenet.com] - "21.Jump.Street.2012.BDRip.AC3.German.XviD-POE.part01.rar"":
"German" in the stem made the tag a name, and the poster's readable uploads
were releases of 1,422 and 1,535 files.

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

lib/release/identity.ts

@@ -244,15 +244,20 @@ export function isPosterTag(remainder: string, stem: string): boolean {
   const whole = new Set(words.split(' '))
   // A per-post id, also inside a word ("FTD772544").
   if (/\d{5,}/.test(remainder)) return false
+  let significant = 0
+  let shared = 0
   for (const word of remainder.toLowerCase().split(/[^a-z0-9]+/)) {
     if (/^\d+$/.test(word)) {
       if (word.length >= 2 && whole.has(word)) return false
       continue
     }
     if (word.length < 3 || TAG_WORDS.has(word)) continue
-    if (word.length >= 4 ? compact.includes(word) : whole.has(word)) return false
+    significant++
+    if (word.length >= 4 ? compact.includes(word) : whole.has(word)) shared++
   }
-  return true
+  // A tag of 4+ words may share one with the stem ("German Board - [Usenet4ever.info] und [SecretUsenet.com] -
+  // "21.Jump.Street.2012.BDRip.AC3.German.XviD-POE.part01.rar"": the poster's uploads were releases of 1,535 files).
+  return shared === 0 || (shared === 1 && significant >= 4)
 }
 
 /**