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>

edge/src/names.rs

@@ -605,6 +605,7 @@ pub fn is_poster_tag(remainder: &str, stem: &str) -> bool {
         return false;
     }
     let rem = remainder.to_lowercase();
+    let (mut significant, mut shared) = (0, 0);
     for word in rem.split(|c: char| !(c.is_ascii_lowercase() || c.is_ascii_digit())) {
         if !word.is_empty() && word.bytes().all(|c| c.is_ascii_digit()) {
             if word.len() >= 2 && whole.contains(word) {
@@ -615,11 +616,13 @@ pub fn is_poster_tag(remainder: &str, stem: &str) -> bool {
         if word.len() < 3 || TAG_WORDS.contains(&word) {
             continue;
         }
+        significant += 1;
         if if word.len() >= 4 { compact.contains(word) } else { whole.contains(word) } {
-            return false;
+            shared += 1;
         }
     }
-    true
+    // A tag of 4+ words may share one with the stem ("German Board - [Usenet4ever.info] und [SecretUsenet.com]").
+    shared == 0 || (shared == 1 && significant >= 4)
 }
 
 /// releaseIdentity for a named (not weak) file: never null.
@@ -1402,6 +1405,8 @@ mod image_set_tests {
         let gb = |n: &str| release_identity("p", &format!(r#"German Board - [Usenet4ever.info] und [SecretUsenet.com] - "{n}" yEnc"#), n);
         assert_eq!(gb("6c57319fbae505679737bd46a76193a1-u4e.part6.rar").key, gb("6c57319fbae505679737bd46a76193a1-u4e.par2").key);
         assert_ne!(gb("6c57319fbae505679737bd46a76193a1-u4e.part6.rar").key, gb("6fc0ff192a355703b3e81557893013b1-u4e.part6.rar").key);
+        assert_ne!(gb("21.Jump.Street.2012.BDRip.AC3.German.XviD-POE.part01.rar").key, gb("Ice.Age.4.Voll.verschoben.2012.BDRip.AC3.German.XviD-POE.part01.rar").key);
+        assert_eq!(gb("21.Jump.Street.2012.BDRip.AC3.German.XviD-POE.part01.rar").key, gb("21.Jump.Street.2012.BDRip.AC3.German.XviD-POE.par2").key);
         let pck = |i: &str, n: &str| release_identity("p", &format!(r#"(????) [{i}/2195] - "{n}" yEnc"#), n);
         assert_eq!(pck("0659", "DN.VPL PCK.1508").key, pck("0660", "DN.VPL PCK.1509").key);
         assert_eq!(pck("0659", "DN.VPL PCK.1508").name, "DN.VPL PCK.1508");

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)
 }
 
 /**

tests/unit/release/identity.spec.ts

@@ -331,6 +331,8 @@ test.group('release / par2 names', () => {
     const gb = (n: string) => id(`German Board - [Usenet4ever.info] und [SecretUsenet.com] - "${n}" yEnc`, n)
     assert.equal(gb('6c57319fbae505679737bd46a76193a1-u4e.part6.rar').key, gb('6c57319fbae505679737bd46a76193a1-u4e.par2').key)
     assert.notEqual(gb('6c57319fbae505679737bd46a76193a1-u4e.part6.rar').key, gb('6fc0ff192a355703b3e81557893013b1-u4e.part6.rar').key)
+    assert.notEqual(gb('21.Jump.Street.2012.BDRip.AC3.German.XviD-POE.part01.rar').key, gb('Ice.Age.4.Voll.verschoben.2012.BDRip.AC3.German.XviD-POE.part01.rar').key)
+    assert.equal(gb('21.Jump.Street.2012.BDRip.AC3.German.XviD-POE.part01.rar').key, gb('21.Jump.Street.2012.BDRip.AC3.German.XviD-POE.par2').key)
     const pck = (i: string, n: string) => id(`(????) [${i}/2195] - "${n}" yEnc`, n)
     assert.equal(pck('0659', 'DN.VPL PCK.1508').key, pck('0660', 'DN.VPL PCK.1509').key)
     assert.equal(pck('0659', 'DN.VPL PCK.1508').name, 'DN.VPL PCK.1508')