feat(meta-validate): add cross-object register-registrar check

Detect configDir by walking up from object path to find
Configuration.xml. For AccumulationRegister, AccountingRegister,
CalculationRegister, and InformationRegister (RecorderSubordinate) scan
Documents/*.xml to verify at least one document references the register
in RegisterRecords. Warn if no registrar found.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/skills/meta-validate/scripts/meta-validate.ps1

@@ -54,6 +54,19 @@ if (-not (Test-Path $ObjectPath)) {
 
 $resolvedPath = (Resolve-Path $ObjectPath).Path
 
+# --- Detect config directory (for cross-object checks) ---
+
+$script:configDir = $null
+$probe = Split-Path $resolvedPath
+for ($depth = 0; $depth -lt 4; $depth++) {
+	if (-not $probe) { break }
+	if (Test-Path (Join-Path $probe "Configuration.xml")) {
+		$script:configDir = $probe
+		break
+	}
+	$probe = Split-Path $probe
+}
+
 # --- Output infrastructure ---
 
 $script:errors = 0
@@ -990,6 +1003,38 @@ if ($propsNode) {
 			}
 		}
 	}
+
+	# Register: must have at least one registrar document
+	$registerTypes = @("AccumulationRegister","AccountingRegister","CalculationRegister","InformationRegister")
+	if ($registerTypes -contains $mdType -and $script:configDir -and $objName -ne "(unknown)") {
+		$needsRegistrar = $true
+		# InformationRegister with WriteMode=Independent does not need a registrar
+		if ($mdType -eq "InformationRegister") {
+			$writeMode = $propsNode.SelectSingleNode("md:WriteMode", $ns)
+			if (-not $writeMode -or $writeMode.InnerText -ne "RecorderSubordinate") {
+				$needsRegistrar = $false
+			}
+		}
+		if ($needsRegistrar) {
+			$regRef = "$mdType.$objName"
+			$docsDir = Join-Path $script:configDir "Documents"
+			$hasRegistrar = $false
+			if (Test-Path $docsDir) {
+				$docXmls = Get-ChildItem $docsDir -Filter "*.xml" -File -ErrorAction SilentlyContinue
+				foreach ($docXml in $docXmls) {
+					$content = [System.IO.File]::ReadAllText($docXml.FullName, [System.Text.Encoding]::UTF8)
+					if ($content.Contains($regRef)) {
+						$hasRegistrar = $true
+						break
+					}
+				}
+			}
+			if (-not $hasRegistrar) {
+				Report-Warn "10. $mdType`: no registrar document found (none references '$regRef' in RegisterRecords)"
+				$check10Issues++
+			}
+		}
+	}
 }
 
 if ($check10Ok -and $check10Issues -eq 0) {

.claude/skills/meta-validate/scripts/meta-validate.py

@@ -59,6 +59,18 @@ if not os.path.exists(object_path):
 
 resolved_path = os.path.abspath(object_path)
 
+# ── detect config directory (for cross-object checks) ────────
+
+config_dir = None
+probe = os.path.dirname(resolved_path)
+for _ in range(4):
+    if not probe:
+        break
+    if os.path.exists(os.path.join(probe, "Configuration.xml")):
+        config_dir = probe
+        break
+    probe = os.path.dirname(probe)
+
 # ── output infrastructure ────────────────────────────────────
 
 errors = 0
@@ -934,6 +946,35 @@ if props_node is not None:
                     check10_issues += 1
                     print('[HINT] /meta-edit -Operation modify-property -Value "ExtDimensionTypes=ChartOfCharacteristicTypes.XXX"')
 
+    # Register: must have at least one registrar document
+    register_types = ('AccumulationRegister', 'AccountingRegister', 'CalculationRegister', 'InformationRegister')
+    if md_type in register_types and config_dir and obj_name != '(unknown)':
+        needs_registrar = True
+        # InformationRegister with WriteMode=Independent does not need a registrar
+        if md_type == 'InformationRegister':
+            write_mode = find(props_node, 'md:WriteMode')
+            if write_mode is None or inner_text(write_mode) != 'RecorderSubordinate':
+                needs_registrar = False
+        if needs_registrar:
+            reg_ref = f'{md_type}.{obj_name}'
+            docs_dir = os.path.join(config_dir, 'Documents')
+            has_registrar = False
+            if os.path.isdir(docs_dir):
+                for fname in os.listdir(docs_dir):
+                    if not fname.endswith('.xml'):
+                        continue
+                    fpath = os.path.join(docs_dir, fname)
+                    if not os.path.isfile(fpath):
+                        continue
+                    with open(fpath, 'r', encoding='utf-8-sig') as f:
+                        content = f.read()
+                    if reg_ref in content:
+                        has_registrar = True
+                        break
+            if not has_registrar:
+                report_warn(f"10. {md_type}: no registrar document found (none references '{reg_ref}' in RegisterRecords)")
+                check10_issues += 1
+
 if check10_ok and check10_issues == 0:
     report_ok("10. Cross-property consistency")