fix: support multi-part prefixes in issue ID extraction (#398)

internal/utils/id_parser_test.go

@@ -353,9 +353,19 @@ func TestExtractIssuePrefix(t *testing.T) {
 			expected: "bd",
 		},
 		{
-			name:     "multi-part suffix",
+			name:     "multi-part prefix with numeric suffix",
 			issueID:  "alpha-beta-1",
-			expected: "alpha", // Only first hyphen (bd-fasa)
+			expected: "alpha-beta", // Last hyphen before numeric suffix
+		},
+		{
+			name:     "multi-part non-numeric suffix",
+			issueID:  "vc-baseline-test",
+			expected: "vc", // Falls back to first hyphen for non-numeric suffix
+		},
+		{
+			name:     "beads-vscode style prefix",
+			issueID:  "beads-vscode-1",
+			expected: "beads-vscode", // Last hyphen before numeric suffix
 		},
 	}
 

internal/utils/issue_id.go

@@ -6,13 +6,36 @@ import (
 )
 
 // ExtractIssuePrefix extracts the prefix from an issue ID like "bd-123" -> "bd"
-// Only considers the first hyphen, so "vc-baseline-test" -> "vc"
+// Uses the last hyphen before a numeric suffix, so "beads-vscode-1" -> "beads-vscode"
+// For non-numeric suffixes like "vc-baseline-test", returns the first segment "vc"
 func ExtractIssuePrefix(issueID string) string {
-	idx := strings.Index(issueID, "-")
-	if idx <= 0 {
+	// Try last hyphen first (handles multi-part prefixes like "beads-vscode-1")
+	lastIdx := strings.LastIndex(issueID, "-")
+	if lastIdx <= 0 {
 		return ""
 	}
-	return issueID[:idx]
+
+	suffix := issueID[lastIdx+1:]
+	// Check if suffix is numeric (or starts with a number for hierarchical IDs like "bd-123.1")
+	if len(suffix) > 0 {
+		// Extract just the numeric part (handle "123.1.2" -> check "123")
+		numPart := suffix
+		if dotIdx := strings.Index(suffix, "."); dotIdx > 0 {
+			numPart = suffix[:dotIdx]
+		}
+		var num int
+		if _, err := fmt.Sscanf(numPart, "%d", &num); err == nil {
+			// Suffix is numeric, use last hyphen
+			return issueID[:lastIdx]
+		}
+	}
+
+	// Suffix is not numeric (e.g., "vc-baseline-test"), fall back to first hyphen
+	firstIdx := strings.Index(issueID, "-")
+	if firstIdx <= 0 {
+		return ""
+	}
+	return issueID[:firstIdx]
 }
 
 // ExtractIssueNumber extracts the number from an issue ID like "bd-123" -> 123