From 5649a1ef38dbb3690a847e2c6d85645aa0b9ac66 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Fri, 21 Mar 2025 15:47:10 +0300
Subject: [PATCH 01/17] feat(#13): missing-caret-references

---
 .../lints/errors/missing-caret-references.xsl | 48 +++++++++++++++++++
 .../catches-missing-caret-ref.yaml            | 13 +++++
 2 files changed, 61 insertions(+)
 create mode 100644 src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
 create mode 100644 src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml

diff --git a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl b/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
new file mode 100644
index 000000000..fd3e927ae
--- /dev/null
+++ b/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
@@ -0,0 +1,48 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+ * SPDX-License-Identifier: MIT
+-->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="missing-caret-references" version="2.0">
+  <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/defect-context.xsl"/>
+  <xsl:output encoding="UTF-8" method="xml"/>
+  <xsl:template match="/">
+    <defects>
+      <!-- starts-with(@base, '$.^') -->
+      <xsl:for-each select="//o[@base and starts-with(@base, '$.^')]">
+        <xsl:variable name="carets">
+          <xsl:analyze-string select="@base" regex="\^\." flags="m">
+            <xsl:matching-substring>
+              <xsl:value-of select="'1'"/>
+            </xsl:matching-substring>
+          </xsl:analyze-string>
+        </xsl:variable>
+        <xsl:variable name="uncareted" select="translate(translate(@base, '.^', ''), '$', '')"/>
+        <xsl:variable name="owner" select="../.."/>
+        <xsl:if test="$owner/o[not(@name=$uncareted)]">
+          <xsl:element name="defect">
+            <xsl:variable name="line" select="eo:lineno(@line)"/>
+            <xsl:attribute name="line">
+              <xsl:value-of select="$line"/>
+            </xsl:attribute>
+            <xsl:if test="$line = '0'">
+              <xsl:attribute name="context">
+                <xsl:value-of select="eo:defect-context(.)"/>
+              </xsl:attribute>
+            </xsl:if>
+            <xsl:attribute name="severity">
+              <xsl:text>error</xsl:text>
+            </xsl:attribute>
+            <xsl:text>The caret reference "</xsl:text>
+            <xsl:value-of select="$uncareted"/>
+            <xsl:text>" </xsl:text>
+            <xsl:text>is missing in "</xsl:text>
+            <xsl:value-of select="$owner/@name"/>
+            <xsl:text>" object</xsl:text>
+          </xsl:element>
+        </xsl:if>
+      </xsl:for-each>
+    </defects>
+  </xsl:template>
+</xsl:stylesheet>
diff --git a/src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml b/src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml
new file mode 100644
index 000000000..f7f5a85c0
--- /dev/null
+++ b/src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml
@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/errors/missing-caret-references.xsl
+asserts:
+  - /defects[count(defect[@severity='error'])=11]
+  - /defects/defect[@line='4']
+input: |
+  # Foo.
+  [] > foo
+    [] > bar
+      ^.hello > @

From 13dcb3fd01ed360149cc9d2f9c51b7b4ac6414b6 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Fri, 21 Mar 2025 16:27:54 +0300
Subject: [PATCH 02/17] feat(#13): allows present

---
 .../lints/errors/missing-caret-references.xsl       |  2 +-
 .../allows-caret-ref-with-present-object.yaml       | 13 +++++++++++++
 .../catches-missing-caret-ref.yaml                  |  2 +-
 3 files changed, 15 insertions(+), 2 deletions(-)
 create mode 100644 src/test/resources/org/eolang/lints/packs/missing-caret-references/allows-caret-ref-with-present-object.yaml

diff --git a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl b/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
index fd3e927ae..5a624c345 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
@@ -20,7 +20,7 @@
         </xsl:variable>
         <xsl:variable name="uncareted" select="translate(translate(@base, '.^', ''), '$', '')"/>
         <xsl:variable name="owner" select="../.."/>
-        <xsl:if test="$owner/o[not(@name=$uncareted)]">
+        <xsl:if test="not($owner/o[@name=$uncareted])">
           <xsl:element name="defect">
             <xsl:variable name="line" select="eo:lineno(@line)"/>
             <xsl:attribute name="line">
diff --git a/src/test/resources/org/eolang/lints/packs/missing-caret-references/allows-caret-ref-with-present-object.yaml b/src/test/resources/org/eolang/lints/packs/missing-caret-references/allows-caret-ref-with-present-object.yaml
new file mode 100644
index 000000000..1673a64b4
--- /dev/null
+++ b/src/test/resources/org/eolang/lints/packs/missing-caret-references/allows-caret-ref-with-present-object.yaml
@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/errors/missing-caret-references.xsl
+asserts:
+  - /defects[count(defect[@severity='error'])=0]
+input: |
+  # Foo.
+  [] > foo
+    [] > hello
+    [] > bar
+      ^.hello > @
diff --git a/src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml b/src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml
index f7f5a85c0..ba9d342b2 100644
--- a/src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml
+++ b/src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml
@@ -4,7 +4,7 @@
 sheets:
   - /org/eolang/lints/errors/missing-caret-references.xsl
 asserts:
-  - /defects[count(defect[@severity='error'])=11]
+  - /defects[count(defect[@severity='error'])=1]
   - /defects/defect[@line='4']
 input: |
   # Foo.

From 667add67b3d4a71f116f2a481507d18f859a56fe Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Fri, 21 Mar 2025 18:36:59 +0300
Subject: [PATCH 03/17] feat(#13): check deeply nested

---
 .../lints/errors/missing-caret-references.xsl | 11 ++--------
 .../catch-missing-carets-deeply-nested.yaml   | 22 +++++++++++++++++++
 2 files changed, 24 insertions(+), 9 deletions(-)
 create mode 100644 src/test/resources/org/eolang/lints/packs/missing-caret-references/catch-missing-carets-deeply-nested.yaml

diff --git a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl b/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
index 5a624c345..e4552d4ba 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
@@ -9,17 +9,10 @@
   <xsl:output encoding="UTF-8" method="xml"/>
   <xsl:template match="/">
     <defects>
-      <!-- starts-with(@base, '$.^') -->
       <xsl:for-each select="//o[@base and starts-with(@base, '$.^')]">
-        <xsl:variable name="carets">
-          <xsl:analyze-string select="@base" regex="\^\." flags="m">
-            <xsl:matching-substring>
-              <xsl:value-of select="'1'"/>
-            </xsl:matching-substring>
-          </xsl:analyze-string>
-        </xsl:variable>
         <xsl:variable name="uncareted" select="translate(translate(@base, '.^', ''), '$', '')"/>
-        <xsl:variable name="owner" select="../.."/>
+        <xsl:variable name="position" select="number((count(tokenize(@base, '\^')) - 1) * 2) + 1"/>
+        <xsl:variable name="owner" select="ancestor::node()[$position]"/>
         <xsl:if test="not($owner/o[@name=$uncareted])">
           <xsl:element name="defect">
             <xsl:variable name="line" select="eo:lineno(@line)"/>
diff --git a/src/test/resources/org/eolang/lints/packs/missing-caret-references/catch-missing-carets-deeply-nested.yaml b/src/test/resources/org/eolang/lints/packs/missing-caret-references/catch-missing-carets-deeply-nested.yaml
new file mode 100644
index 000000000..92ae724ff
--- /dev/null
+++ b/src/test/resources/org/eolang/lints/packs/missing-caret-references/catch-missing-carets-deeply-nested.yaml
@@ -0,0 +1,22 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/errors/missing-caret-references.xsl
+asserts:
+  - /defects[count(defect[@severity='error'])=1]
+  - /defects/defect[@line='10']
+  - /defects/defect[1][normalize-space()='The caret reference "messageeee" is missing in "foo" object']
+input: |
+  # Foo.
+  [] > foo
+    "yes" > message
+    [] > bar
+      while
+        [i] >>
+          if.
+            i.lt 5
+            QQ.io.stdout
+              ^.^.messageeee
+            true
+        true > [i]

From 0159fe8728b72df40a55de3a0054e7b707fdfcf3 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Fri, 21 Mar 2025 18:53:56 +0300
Subject: [PATCH 04/17] feat(#13): correct calculation

---
 .../org/eolang/lints/errors/missing-caret-references.xsl        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl b/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
index e4552d4ba..d17c5cba0 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
@@ -11,7 +11,7 @@
     <defects>
       <xsl:for-each select="//o[@base and starts-with(@base, '$.^')]">
         <xsl:variable name="uncareted" select="translate(translate(@base, '.^', ''), '$', '')"/>
-        <xsl:variable name="position" select="number((count(tokenize(@base, '\^')) - 1) * 2) + 1"/>
+        <xsl:variable name="position" select="(count(tokenize(@base, '\^')) - 1) * 2"/>
         <xsl:variable name="owner" select="ancestor::node()[$position]"/>
         <xsl:if test="not($owner/o[@name=$uncareted])">
           <xsl:element name="defect">

From 6f59c21f00fcea935a0e975b7730c8a88148fed3 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 26 Mar 2025 14:17:17 +0300
Subject: [PATCH 05/17] feat(#13): if auto move up

---
 .../lints/errors/missing-caret-references.xsl | 74 +++++++++++++------
 1 file changed, 53 insertions(+), 21 deletions(-)

diff --git a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl b/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
index d17c5cba0..eec634710 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
@@ -12,29 +12,61 @@
       <xsl:for-each select="//o[@base and starts-with(@base, '$.^')]">
         <xsl:variable name="uncareted" select="translate(translate(@base, '.^', ''), '$', '')"/>
         <xsl:variable name="position" select="(count(tokenize(@base, '\^')) - 1) * 2"/>
+        <!-- if $current has auto named objects -> move up -->
         <xsl:variable name="owner" select="ancestor::node()[$position]"/>
-        <xsl:if test="not($owner/o[@name=$uncareted])">
-          <xsl:element name="defect">
-            <xsl:variable name="line" select="eo:lineno(@line)"/>
-            <xsl:attribute name="line">
-              <xsl:value-of select="$line"/>
-            </xsl:attribute>
-            <xsl:if test="$line = '0'">
-              <xsl:attribute name="context">
-                <xsl:value-of select="eo:defect-context(.)"/>
-              </xsl:attribute>
+        <xsl:choose>
+<!--          <xsl:when test="contains($owner/o[1]/@name, 'a🌵')">-->
+          <xsl:when test="not(empty($owner/o[starts-with(@name, 'a🌵')]))">
+            <!-- up to parent relatively to $owner -->
+            <xsl:variable name="upper" select="ancestor::node()[$position + 1]"/>
+            <xsl:if test="not($upper/o[@name=$uncareted])">
+              <xsl:element name="defect">
+                <xsl:variable name="line" select="eo:lineno(@line)"/>
+                <xsl:attribute name="line">
+                  <xsl:value-of select="$line"/>
+                </xsl:attribute>
+                <xsl:if test="$line = '0'">
+                  <xsl:attribute name="context">
+                    <xsl:value-of select="eo:defect-context(.)"/>
+                  </xsl:attribute>
+                </xsl:if>
+                <xsl:attribute name="severity">
+                  <xsl:text>error</xsl:text>
+                </xsl:attribute>
+                <xsl:text>The caret reference "</xsl:text>
+                <xsl:value-of select="$uncareted"/>
+                <xsl:text>" </xsl:text>
+                <xsl:text>is missing in "</xsl:text>
+                <xsl:value-of select="$upper/@name"/>
+                <xsl:text>" object</xsl:text>
+              </xsl:element>
             </xsl:if>
-            <xsl:attribute name="severity">
-              <xsl:text>error</xsl:text>
-            </xsl:attribute>
-            <xsl:text>The caret reference "</xsl:text>
-            <xsl:value-of select="$uncareted"/>
-            <xsl:text>" </xsl:text>
-            <xsl:text>is missing in "</xsl:text>
-            <xsl:value-of select="$owner/@name"/>
-            <xsl:text>" object</xsl:text>
-          </xsl:element>
-        </xsl:if>
+          </xsl:when>
+          <xsl:otherwise>
+            <xsl:if test="not($owner/o[@name=$uncareted])">
+              <xsl:element name="defect">
+                <xsl:variable name="line" select="eo:lineno(@line)"/>
+                <xsl:attribute name="line">
+                  <xsl:value-of select="$line"/>
+                </xsl:attribute>
+                <xsl:if test="$line = '0'">
+                  <xsl:attribute name="context">
+                    <xsl:value-of select="eo:defect-context(.)"/>
+                  </xsl:attribute>
+                </xsl:if>
+                <xsl:attribute name="severity">
+                  <xsl:text>error</xsl:text>
+                </xsl:attribute>
+                <xsl:text>The caret reference "</xsl:text>
+                <xsl:value-of select="$uncareted"/>
+                <xsl:text>" </xsl:text>
+                <xsl:text>is missing in "</xsl:text>
+                <xsl:value-of select="$owner/@name"/>
+                <xsl:text>" object</xsl:text>
+              </xsl:element>
+            </xsl:if>
+          </xsl:otherwise>
+        </xsl:choose>
       </xsl:for-each>
     </defects>
   </xsl:template>

From 140e9740eb018a1385c104b230d024392b9bee3d Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 26 Mar 2025 14:48:39 +0300
Subject: [PATCH 06/17] feat(#13): rho

---
 .../{missing-caret-references.xsl => missing-rho-reference.xsl} | 2 +-
 .../allows-rho-ref-to-present-object.yaml}                      | 2 +-
 .../catch-missing-rho-ref-from-deeply-nested.yaml}              | 2 +-
 .../catches-missing-rho-ref.yaml}                               | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)
 rename src/main/resources/org/eolang/lints/errors/{missing-caret-references.xsl => missing-rho-reference.xsl} (97%)
 rename src/test/resources/org/eolang/lints/packs/{missing-caret-references/allows-caret-ref-with-present-object.yaml => missing-rho-reference/allows-rho-ref-to-present-object.yaml} (80%)
 rename src/test/resources/org/eolang/lints/packs/{missing-caret-references/catch-missing-carets-deeply-nested.yaml => missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml} (89%)
 rename src/test/resources/org/eolang/lints/packs/{missing-caret-references/catches-missing-caret-ref.yaml => missing-rho-reference/catches-missing-rho-ref.yaml} (81%)

diff --git a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
similarity index 97%
rename from src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
rename to src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
index eec634710..7fba70b2c 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-caret-references.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
@@ -3,7 +3,7 @@
  * SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
  * SPDX-License-Identifier: MIT
 -->
-<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="missing-caret-references" version="2.0">
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="missing-rho-reference" version="2.0">
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
   <xsl:import href="/org/eolang/funcs/defect-context.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
diff --git a/src/test/resources/org/eolang/lints/packs/missing-caret-references/allows-caret-ref-with-present-object.yaml b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object.yaml
similarity index 80%
rename from src/test/resources/org/eolang/lints/packs/missing-caret-references/allows-caret-ref-with-present-object.yaml
rename to src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object.yaml
index 1673a64b4..0678494c3 100644
--- a/src/test/resources/org/eolang/lints/packs/missing-caret-references/allows-caret-ref-with-present-object.yaml
+++ b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object.yaml
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: MIT
 ---
 sheets:
-  - /org/eolang/lints/errors/missing-caret-references.xsl
+  - /org/eolang/lints/errors/missing-rho-reference.xsl
 asserts:
   - /defects[count(defect[@severity='error'])=0]
 input: |
diff --git a/src/test/resources/org/eolang/lints/packs/missing-caret-references/catch-missing-carets-deeply-nested.yaml b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
similarity index 89%
rename from src/test/resources/org/eolang/lints/packs/missing-caret-references/catch-missing-carets-deeply-nested.yaml
rename to src/test/resources/org/eolang/lints/packs/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
index 92ae724ff..4e7b7cbae 100644
--- a/src/test/resources/org/eolang/lints/packs/missing-caret-references/catch-missing-carets-deeply-nested.yaml
+++ b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: MIT
 ---
 sheets:
-  - /org/eolang/lints/errors/missing-caret-references.xsl
+  - /org/eolang/lints/errors/missing-rho-reference.xsl
 asserts:
   - /defects[count(defect[@severity='error'])=1]
   - /defects/defect[@line='10']
diff --git a/src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/catches-missing-rho-ref.yaml
similarity index 81%
rename from src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml
rename to src/test/resources/org/eolang/lints/packs/missing-rho-reference/catches-missing-rho-ref.yaml
index ba9d342b2..ba58717dc 100644
--- a/src/test/resources/org/eolang/lints/packs/missing-caret-references/catches-missing-caret-ref.yaml
+++ b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/catches-missing-rho-ref.yaml
@@ -2,7 +2,7 @@
 # SPDX-License-Identifier: MIT
 ---
 sheets:
-  - /org/eolang/lints/errors/missing-caret-references.xsl
+  - /org/eolang/lints/errors/missing-rho-reference.xsl
 asserts:
   - /defects[count(defect[@severity='error'])=1]
   - /defects/defect[@line='4']

From fc4fbb03367b1b0efa013bb2cb902454d77852f4 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 26 Mar 2025 14:51:23 +0300
Subject: [PATCH 07/17] feat(#13): allows to present from deeply nested

---
 ...-to-present-object-from-deeply-nested.yaml | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml

diff --git a/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml
new file mode 100644
index 000000000..159c691d8
--- /dev/null
+++ b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml
@@ -0,0 +1,20 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/errors/missing-rho-reference.xsl
+asserts:
+  - /defects[count(defect[@severity='error'])=0]
+input: |
+  # Foo.
+  [] > foo
+    "yes" > message
+    [] > bar
+      while
+        [i] >>
+          if.
+            i.lt 5
+            QQ.io.stdout
+              ^.^.message
+            true
+        true > [i]

From 94ed688d9bcb508cd7ee1325c10576cfa5a6c903 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 26 Mar 2025 15:05:49 +0300
Subject: [PATCH 08/17] feat(#13): recursion

---
 .../lints/errors/missing-rho-reference.xsl    | 98 +++++++++----------
 1 file changed, 44 insertions(+), 54 deletions(-)

diff --git a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
index 7fba70b2c..648dfec81 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
@@ -7,66 +7,56 @@
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
   <xsl:import href="/org/eolang/funcs/defect-context.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
+  <xsl:template name="no-autonamed">
+    <xsl:param name="position"/>
+    <xsl:param name="uncareted"/>
+    <xsl:param name="owner"/>
+    <xsl:choose>
+      <xsl:when test="not(empty($owner/o[starts-with(@name, 'a🌵')]))">
+        <xsl:variable name="upper" select="ancestor::node()[$position + 1]"/>
+        <xsl:call-template name="no-autonamed">
+          <xsl:with-param name="position" select="$position + 1"/>
+          <xsl:with-param name="uncareted" select="$uncareted"/>
+          <xsl:with-param name="owner" select="$upper"/>
+        </xsl:call-template>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:if test="not($owner/o[@name=$uncareted])">
+          <xsl:element name="defect">
+            <xsl:variable name="line" select="eo:lineno(@line)"/>
+            <xsl:attribute name="line">
+              <xsl:value-of select="$line"/>
+            </xsl:attribute>
+            <xsl:if test="$line = '0'">
+              <xsl:attribute name="context">
+                <xsl:value-of select="eo:defect-context(.)"/>
+              </xsl:attribute>
+            </xsl:if>
+            <xsl:attribute name="severity">
+              <xsl:text>error</xsl:text>
+            </xsl:attribute>
+            <xsl:text>The caret reference "</xsl:text>
+            <xsl:value-of select="$uncareted"/>
+            <xsl:text>" </xsl:text>
+            <xsl:text>is missing in "</xsl:text>
+            <xsl:value-of select="$owner/@name"/>
+            <xsl:text>" object</xsl:text>
+          </xsl:element>
+        </xsl:if>
+      </xsl:otherwise>
+    </xsl:choose>
+  </xsl:template>
   <xsl:template match="/">
     <defects>
       <xsl:for-each select="//o[@base and starts-with(@base, '$.^')]">
         <xsl:variable name="uncareted" select="translate(translate(@base, '.^', ''), '$', '')"/>
         <xsl:variable name="position" select="(count(tokenize(@base, '\^')) - 1) * 2"/>
-        <!-- if $current has auto named objects -> move up -->
         <xsl:variable name="owner" select="ancestor::node()[$position]"/>
-        <xsl:choose>
-<!--          <xsl:when test="contains($owner/o[1]/@name, 'a🌵')">-->
-          <xsl:when test="not(empty($owner/o[starts-with(@name, 'a🌵')]))">
-            <!-- up to parent relatively to $owner -->
-            <xsl:variable name="upper" select="ancestor::node()[$position + 1]"/>
-            <xsl:if test="not($upper/o[@name=$uncareted])">
-              <xsl:element name="defect">
-                <xsl:variable name="line" select="eo:lineno(@line)"/>
-                <xsl:attribute name="line">
-                  <xsl:value-of select="$line"/>
-                </xsl:attribute>
-                <xsl:if test="$line = '0'">
-                  <xsl:attribute name="context">
-                    <xsl:value-of select="eo:defect-context(.)"/>
-                  </xsl:attribute>
-                </xsl:if>
-                <xsl:attribute name="severity">
-                  <xsl:text>error</xsl:text>
-                </xsl:attribute>
-                <xsl:text>The caret reference "</xsl:text>
-                <xsl:value-of select="$uncareted"/>
-                <xsl:text>" </xsl:text>
-                <xsl:text>is missing in "</xsl:text>
-                <xsl:value-of select="$upper/@name"/>
-                <xsl:text>" object</xsl:text>
-              </xsl:element>
-            </xsl:if>
-          </xsl:when>
-          <xsl:otherwise>
-            <xsl:if test="not($owner/o[@name=$uncareted])">
-              <xsl:element name="defect">
-                <xsl:variable name="line" select="eo:lineno(@line)"/>
-                <xsl:attribute name="line">
-                  <xsl:value-of select="$line"/>
-                </xsl:attribute>
-                <xsl:if test="$line = '0'">
-                  <xsl:attribute name="context">
-                    <xsl:value-of select="eo:defect-context(.)"/>
-                  </xsl:attribute>
-                </xsl:if>
-                <xsl:attribute name="severity">
-                  <xsl:text>error</xsl:text>
-                </xsl:attribute>
-                <xsl:text>The caret reference "</xsl:text>
-                <xsl:value-of select="$uncareted"/>
-                <xsl:text>" </xsl:text>
-                <xsl:text>is missing in "</xsl:text>
-                <xsl:value-of select="$owner/@name"/>
-                <xsl:text>" object</xsl:text>
-              </xsl:element>
-            </xsl:if>
-          </xsl:otherwise>
-        </xsl:choose>
+        <xsl:call-template name="no-autonamed">
+          <xsl:with-param name="position" select="$position"/>
+          <xsl:with-param name="uncareted" select="$uncareted"/>
+          <xsl:with-param name="owner" select="$owner"/>
+        </xsl:call-template>
       </xsl:for-each>
     </defects>
   </xsl:template>

From 07f9892c4301953b1e720de925d57af7a49539e8 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 26 Mar 2025 16:35:01 +0300
Subject: [PATCH 09/17] feat(#13): cleaned up

---
 .../lints/errors/missing-rho-reference.xsl    | 33 +++++++++++--------
 .../motives/errors/missing-rho-reference.md   | 26 +++++++++++++++
 ...-ref-when-parent-has-multiple-objects.yaml | 14 ++++++++
 ...ch-missing-rho-ref-from-deeply-nested.yaml |  2 +-
 4 files changed, 60 insertions(+), 15 deletions(-)
 create mode 100644 src/main/resources/org/eolang/motives/errors/missing-rho-reference.md
 create mode 100644 src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-when-parent-has-multiple-objects.yaml

diff --git a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
index 648dfec81..ee09b3db1 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
@@ -7,21 +7,28 @@
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
   <xsl:import href="/org/eolang/funcs/defect-context.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
-  <xsl:template name="no-autonamed">
+  <!--
+   Recursively check if owner object is not auto named object, otherwise check is attribute is present.
+   You can read more about auto named objects here: https://news.eolang.org/2025-02-21-auto-named-abstract-objects.html.
+   @todo #13:45min Restructure `report-missing` template and its call in the root template.
+    Currently, we are calling `report-missing` template from root template to do the job, while
+    we should return only the parent object to which the rho attribute refers. Also, don't forget
+    to rename the template to something like `rho-parent`.
+  -->
+  <xsl:template name="report-missing">
     <xsl:param name="position"/>
-    <xsl:param name="uncareted"/>
+    <xsl:param name="attribute"/>
     <xsl:param name="owner"/>
     <xsl:choose>
       <xsl:when test="not(empty($owner/o[starts-with(@name, 'a🌵')]))">
-        <xsl:variable name="upper" select="ancestor::node()[$position + 1]"/>
-        <xsl:call-template name="no-autonamed">
+        <xsl:call-template name="report-missing">
           <xsl:with-param name="position" select="$position + 1"/>
-          <xsl:with-param name="uncareted" select="$uncareted"/>
-          <xsl:with-param name="owner" select="$upper"/>
+          <xsl:with-param name="attribute" select="$attribute"/>
+          <xsl:with-param name="owner" select="ancestor::node()[$position + 1]"/>
         </xsl:call-template>
       </xsl:when>
       <xsl:otherwise>
-        <xsl:if test="not($owner/o[@name=$uncareted])">
+        <xsl:if test="not($owner/o[@name=$attribute])">
           <xsl:element name="defect">
             <xsl:variable name="line" select="eo:lineno(@line)"/>
             <xsl:attribute name="line">
@@ -35,8 +42,8 @@
             <xsl:attribute name="severity">
               <xsl:text>error</xsl:text>
             </xsl:attribute>
-            <xsl:text>The caret reference "</xsl:text>
-            <xsl:value-of select="$uncareted"/>
+            <xsl:text>The rho reference "</xsl:text>
+            <xsl:value-of select="$attribute"/>
             <xsl:text>" </xsl:text>
             <xsl:text>is missing in "</xsl:text>
             <xsl:value-of select="$owner/@name"/>
@@ -49,13 +56,11 @@
   <xsl:template match="/">
     <defects>
       <xsl:for-each select="//o[@base and starts-with(@base, '$.^')]">
-        <xsl:variable name="uncareted" select="translate(translate(@base, '.^', ''), '$', '')"/>
         <xsl:variable name="position" select="(count(tokenize(@base, '\^')) - 1) * 2"/>
-        <xsl:variable name="owner" select="ancestor::node()[$position]"/>
-        <xsl:call-template name="no-autonamed">
+        <xsl:call-template name="report-missing">
           <xsl:with-param name="position" select="$position"/>
-          <xsl:with-param name="uncareted" select="$uncareted"/>
-          <xsl:with-param name="owner" select="$owner"/>
+          <xsl:with-param name="attribute" select="translate(translate(@base, '.^', ''), '$', '')"/>
+          <xsl:with-param name="owner" select="ancestor::node()[$position]"/>
         </xsl:call-template>
       </xsl:for-each>
     </defects>
diff --git a/src/main/resources/org/eolang/motives/errors/missing-rho-reference.md b/src/main/resources/org/eolang/motives/errors/missing-rho-reference.md
new file mode 100644
index 000000000..65060ab67
--- /dev/null
+++ b/src/main/resources/org/eolang/motives/errors/missing-rho-reference.md
@@ -0,0 +1,26 @@
+# Missing `^.` Reference
+
+Each [rho][EO-specials] reference (`^.`) should point only to an existing
+objects.
+
+Incorrect:
+
+```eo
+# Foo.
+[] > foo
+  [] > message
+  [] > bar
+    ^.boom > @
+```
+
+Correct:
+
+```eo
+# Foo.
+[] > foo
+  [] > message
+  [] > bar
+    ^.message > @
+```
+
+[EO-specials]: https://news.eolang.org/2024-05-14-rho-sigma-delta-lambda.html
diff --git a/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-when-parent-has-multiple-objects.yaml b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-when-parent-has-multiple-objects.yaml
new file mode 100644
index 000000000..d5a8e2507
--- /dev/null
+++ b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-when-parent-has-multiple-objects.yaml
@@ -0,0 +1,14 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/errors/missing-rho-reference.xsl
+asserts:
+  - /defects[count(defect[@severity='error'])=0]
+input: |
+  # Foo.
+  [] > foo
+    [] > hello
+    [] > message
+    [] > bar
+      ^.message > @
diff --git a/src/test/resources/org/eolang/lints/packs/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
index 4e7b7cbae..4a616175a 100644
--- a/src/test/resources/org/eolang/lints/packs/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
+++ b/src/test/resources/org/eolang/lints/packs/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
@@ -6,7 +6,7 @@ sheets:
 asserts:
   - /defects[count(defect[@severity='error'])=1]
   - /defects/defect[@line='10']
-  - /defects/defect[1][normalize-space()='The caret reference "messageeee" is missing in "foo" object']
+  - /defects/defect[1][normalize-space()='The rho reference "messageeee" is missing in "foo" object']
 input: |
   # Foo.
   [] > foo

From fb0f8d914de3fa7228ce542e1dfb291278d9a3f5 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Mon, 31 Mar 2025 22:13:56 +0300
Subject: [PATCH 10/17] feat(#13): skip non-abstracts

---
 .../resources/org/eolang/lints/errors/missing-rho-reference.xsl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
index ee09b3db1..20c5aa4c5 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
@@ -20,7 +20,7 @@
     <xsl:param name="attribute"/>
     <xsl:param name="owner"/>
     <xsl:choose>
-      <xsl:when test="not(empty($owner/o[starts-with(@name, 'a🌵')]))">
+      <xsl:when test="$owner[(not(@name) and @base) or @name='@'] or not(empty($owner/o[starts-with(@name, 'a🌵')]))">
         <xsl:call-template name="report-missing">
           <xsl:with-param name="position" select="$position + 1"/>
           <xsl:with-param name="attribute" select="$attribute"/>

From a9f338ce9931f861240adc584b9c4fa0cb08935a Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Mon, 31 Mar 2025 22:21:31 +0300
Subject: [PATCH 11/17] feat(#13): eo:abstract

---
 .../org/eolang/lints/errors/missing-rho-reference.xsl          | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
index 20c5aa4c5..839446e93 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: MIT
 -->
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="missing-rho-reference" version="2.0">
+  <xsl:import href="/org/eolang/parser/_funcs.xsl"/>
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
   <xsl:import href="/org/eolang/funcs/defect-context.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
@@ -20,7 +21,7 @@
     <xsl:param name="attribute"/>
     <xsl:param name="owner"/>
     <xsl:choose>
-      <xsl:when test="$owner[(not(@name) and @base) or @name='@'] or not(empty($owner/o[starts-with(@name, 'a🌵')]))">
+      <xsl:when test="$owner[not(eo:abstract(.)) or @name='@'] or not(empty($owner/o[starts-with(@name, 'a🌵')]))">
         <xsl:call-template name="report-missing">
           <xsl:with-param name="position" select="$position + 1"/>
           <xsl:with-param name="attribute" select="$attribute"/>

From 8b7b070684161a6bd95b9003a6f9629766bab391 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 2 Apr 2025 11:51:16 +0300
Subject: [PATCH 12/17] feat(#13): clean

---
 .../lints/errors/missing-rho-reference.xsl      | 17 ++++++++++-------
 ...ef-to-present-object-from-deeply-nested.yaml |  0
 .../allows-rho-ref-to-present-object.yaml       |  0
 ...ho-ref-when-parent-has-multiple-objects.yaml |  0
 ...atch-missing-rho-ref-from-deeply-nested.yaml |  0
 .../catches-missing-rho-ref.yaml                |  0
 6 files changed, 10 insertions(+), 7 deletions(-)
 rename src/test/resources/org/eolang/lints/packs/{ => single}/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml (100%)
 rename src/test/resources/org/eolang/lints/packs/{ => single}/missing-rho-reference/allows-rho-ref-to-present-object.yaml (100%)
 rename src/test/resources/org/eolang/lints/packs/{ => single}/missing-rho-reference/allows-rho-ref-when-parent-has-multiple-objects.yaml (100%)
 rename src/test/resources/org/eolang/lints/packs/{ => single}/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml (100%)
 rename src/test/resources/org/eolang/lints/packs/{ => single}/missing-rho-reference/catches-missing-rho-ref.yaml (100%)

diff --git a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
index 839446e93..a0f7f058c 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
@@ -21,15 +21,18 @@
     <xsl:param name="attribute"/>
     <xsl:param name="owner"/>
     <xsl:choose>
-      <xsl:when test="$owner[not(eo:abstract(.)) or @name='@'] or not(empty($owner/o[starts-with(@name, 'a🌵')]))">
-        <xsl:call-template name="report-missing">
-          <xsl:with-param name="position" select="$position + 1"/>
-          <xsl:with-param name="attribute" select="$attribute"/>
-          <xsl:with-param name="owner" select="ancestor::node()[$position + 1]"/>
-        </xsl:call-template>
+      <xsl:when test="$owner[not(eo:abstract(.))] or not(empty($owner/o[starts-with(@name, 'a🌵')]))">
+        <xsl:variable name="up" select="ancestor::node()[$position + 1]"/>
+        <xsl:if test="name($up) = 'o'">
+          <xsl:call-template name="report-missing">
+            <xsl:with-param name="position" select="$position + 1"/>
+            <xsl:with-param name="attribute" select="$attribute"/>
+            <xsl:with-param name="owner" select="$up"/>
+          </xsl:call-template>
+        </xsl:if>
       </xsl:when>
       <xsl:otherwise>
-        <xsl:if test="not($owner/o[@name=$attribute])">
+        <xsl:if test="not($owner/o[@name=$attribute]) and not(contains($owner/@name, 'a🌵'))">
           <xsl:element name="defect">
             <xsl:variable name="line" select="eo:lineno(@line)"/>
             <xsl:attribute name="line">
diff --git a/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml
similarity index 100%
rename from src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml
rename to src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml
diff --git a/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object.yaml b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/allows-rho-ref-to-present-object.yaml
similarity index 100%
rename from src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-to-present-object.yaml
rename to src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/allows-rho-ref-to-present-object.yaml
diff --git a/src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-when-parent-has-multiple-objects.yaml b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/allows-rho-ref-when-parent-has-multiple-objects.yaml
similarity index 100%
rename from src/test/resources/org/eolang/lints/packs/missing-rho-reference/allows-rho-ref-when-parent-has-multiple-objects.yaml
rename to src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/allows-rho-ref-when-parent-has-multiple-objects.yaml
diff --git a/src/test/resources/org/eolang/lints/packs/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
similarity index 100%
rename from src/test/resources/org/eolang/lints/packs/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
rename to src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
diff --git a/src/test/resources/org/eolang/lints/packs/missing-rho-reference/catches-missing-rho-ref.yaml b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catches-missing-rho-ref.yaml
similarity index 100%
rename from src/test/resources/org/eolang/lints/packs/missing-rho-reference/catches-missing-rho-ref.yaml
rename to src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catches-missing-rho-ref.yaml

From 14e7c5f48569c39ebd644cbb5f0678ee39bbc3d9 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 2 Apr 2025 11:56:29 +0300
Subject: [PATCH 13/17] feat(#13): escape

---
 .../eolang/lints/errors/missing-rho-reference.xsl    | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
index a0f7f058c..046a79c2b 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
@@ -6,6 +6,7 @@
 <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:eo="https://www.eolang.org" id="missing-rho-reference" version="2.0">
   <xsl:import href="/org/eolang/parser/_funcs.xsl"/>
   <xsl:import href="/org/eolang/funcs/lineno.xsl"/>
+  <xsl:import href="/org/eolang/funcs/escape.xsl"/>
   <xsl:import href="/org/eolang/funcs/defect-context.xsl"/>
   <xsl:output encoding="UTF-8" method="xml"/>
   <!--
@@ -46,12 +47,11 @@
             <xsl:attribute name="severity">
               <xsl:text>error</xsl:text>
             </xsl:attribute>
-            <xsl:text>The rho reference "</xsl:text>
-            <xsl:value-of select="$attribute"/>
-            <xsl:text>" </xsl:text>
-            <xsl:text>is missing in "</xsl:text>
-            <xsl:value-of select="$owner/@name"/>
-            <xsl:text>" object</xsl:text>
+            <xsl:text>The rho reference </xsl:text>
+            <xsl:value-of select="eo:escape($attribute)"/>
+            <xsl:text> is missing in </xsl:text>
+            <xsl:value-of select="eo:escape($owner/@name)"/>
+            <xsl:text> object</xsl:text>
           </xsl:element>
         </xsl:if>
       </xsl:otherwise>

From c76ab8d4268f609800099edb850285119b954f7b Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 2 Apr 2025 12:01:44 +0300
Subject: [PATCH 14/17] feat(#13): puzzle

---
 .../org/eolang/lints/errors/missing-rho-reference.xsl        | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
index 046a79c2b..5efd39184 100644
--- a/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
+++ b/src/main/resources/org/eolang/lints/errors/missing-rho-reference.xsl
@@ -33,6 +33,11 @@
         </xsl:if>
       </xsl:when>
       <xsl:otherwise>
+        <!--
+          @todo #13:90min Enable processing of rho references inside auto named objects.
+           For now we ignore them, but we need to check them as well, as they are abstract
+           objects. Don't forget to add test packs with auto named objects.
+        -->
         <xsl:if test="not($owner/o[@name=$attribute]) and not(contains($owner/@name, 'a🌵'))">
           <xsl:element name="defect">
             <xsl:variable name="line" select="eo:lineno(@line)"/>

From 771770a83ebacbf5ac340b4ec22ab21d012acdba Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 21 May 2025 12:58:49 +0300
Subject: [PATCH 15/17] bug(#13): yaml fix

---
 .../catch-missing-rho-ref-from-deeply-nested.yaml                | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
index 4a616175a..1b76c87c3 100644
--- a/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
+++ b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
@@ -1,6 +1,7 @@
 # SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
 # SPDX-License-Identifier: MIT
 ---
+# yamllint disable rule:line-length
 sheets:
   - /org/eolang/lints/errors/missing-rho-reference.xsl
 asserts:

From 306e92c9e5c20a8f99c6f748c9a595fadcb9ebc3 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 21 May 2025 14:30:25 +0300
Subject: [PATCH 16/17] bug(#13): no errors

---
 ...ho-ref-to-present-object-from-deeply-nested.yaml |  4 ++--
 .../catch-missing-rho-ref-from-deeply-nested.yaml   |  7 +++----
 .../single/redundant-object/respects-constants.yaml | 13 +++++++++++++
 3 files changed, 18 insertions(+), 6 deletions(-)
 create mode 100644 src/test/resources/org/eolang/lints/packs/single/redundant-object/respects-constants.yaml

diff --git a/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml
index 159c691d8..97703bc4d 100644
--- a/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml
+++ b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/allows-rho-ref-to-present-object-from-deeply-nested.yaml
@@ -10,9 +10,9 @@ input: |
   [] > foo
     "yes" > message
     [] > bar
-      while
+      while > @
         [i] >>
-          if.
+          if. > @
             i.lt 5
             QQ.io.stdout
               ^.^.message
diff --git a/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
index 1b76c87c3..1ab946947 100644
--- a/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
+++ b/src/test/resources/org/eolang/lints/packs/single/missing-rho-reference/catch-missing-rho-ref-from-deeply-nested.yaml
@@ -6,16 +6,15 @@ sheets:
   - /org/eolang/lints/errors/missing-rho-reference.xsl
 asserts:
   - /defects[count(defect[@severity='error'])=1]
-  - /defects/defect[@line='10']
+  - /defects/defect[@line='9']
   - /defects/defect[1][normalize-space()='The rho reference "messageeee" is missing in "foo" object']
 input: |
   # Foo.
   [] > foo
-    "yes" > message
     [] > bar
-      while
+      while > @
         [i] >>
-          if.
+          if. > @
             i.lt 5
             QQ.io.stdout
               ^.^.messageeee
diff --git a/src/test/resources/org/eolang/lints/packs/single/redundant-object/respects-constants.yaml b/src/test/resources/org/eolang/lints/packs/single/redundant-object/respects-constants.yaml
new file mode 100644
index 000000000..c4197dcca
--- /dev/null
+++ b/src/test/resources/org/eolang/lints/packs/single/redundant-object/respects-constants.yaml
@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
+# SPDX-License-Identifier: MIT
+---
+sheets:
+  - /org/eolang/lints/misc/redundant-object.xsl
+asserts:
+  - /defects[count(defect)=0]
+input: |
+  # Foo.
+  [] > foo
+    start > @
+      # name! -> $name, name -> o[@base=`Q.org.eolang.dataized`]
+      string "Jeff" > name!

From e367bfe776ef2e9a6830e012aff813a7d5e35d28 Mon Sep 17 00:00:00 2001
From: h1alexbel <h1alexbelx@gmail.com>
Date: Wed, 21 May 2025 14:32:23 +0300
Subject: [PATCH 17/17] chore: missed file

---
 .../single/redundant-object/respects-constants.yaml | 13 -------------
 1 file changed, 13 deletions(-)
 delete mode 100644 src/test/resources/org/eolang/lints/packs/single/redundant-object/respects-constants.yaml

diff --git a/src/test/resources/org/eolang/lints/packs/single/redundant-object/respects-constants.yaml b/src/test/resources/org/eolang/lints/packs/single/redundant-object/respects-constants.yaml
deleted file mode 100644
index c4197dcca..000000000
--- a/src/test/resources/org/eolang/lints/packs/single/redundant-object/respects-constants.yaml
+++ /dev/null
@@ -1,13 +0,0 @@
-# SPDX-FileCopyrightText: Copyright (c) 2016-2025 Objectionary.com
-# SPDX-License-Identifier: MIT
----
-sheets:
-  - /org/eolang/lints/misc/redundant-object.xsl
-asserts:
-  - /defects[count(defect)=0]
-input: |
-  # Foo.
-  [] > foo
-    start > @
-      # name! -> $name, name -> o[@base=`Q.org.eolang.dataized`]
-      string "Jeff" > name!