diff --git a/docs/guide/users/checking.md b/docs/guide/users/checking.md
index 32e5611d..0531baa3 100644
--- a/docs/guide/users/checking.md
+++ b/docs/guide/users/checking.md
@@ -672,7 +672,7 @@ $ griffe check griffe -ssrc -b0.46.0 -a0.45.0 --verbose
 [](){#format-markdown}
 ### Markdown
 
-[:octicons-heart-fill-24:{ .pulse } Sponsors only](../../insiders/index.md){ .insiders } — [:octicons-tag-24: Insiders 1.0.0](../../insiders/changelog.md#1.0.0)
+[:octicons-tag-24: Insiders 1.0.0](../../insiders/changelog.md#1.0.0)
 
 - **CLI**: `-f markdown`
 - **API**: `check(..., style="markdown")` / `check(..., style=ExplanationStyle.MARKDOWN)`
@@ -705,7 +705,7 @@ The Markdown format is adapted for changelogs. It doesn't show the file and line
 [](){#format-github}
 ### GitHub
 
-[:octicons-heart-fill-24:{ .pulse } Sponsors only](../../insiders/index.md){ .insiders } — [:octicons-tag-24: Insiders 1.0.0](../../insiders/changelog.md#1.0.0)
+[:octicons-tag-24: Insiders 1.0.0](../../insiders/changelog.md#1.0.0)
 
 - **CLI**: `-f github`
 - **API**: `check(..., style="github")` / `check(..., style=ExplanationStyle.GITHUB)`
diff --git a/src/_griffe/cli.py b/src/_griffe/cli.py
index 4658ca25..8c819d1a 100644
--- a/src/_griffe/cli.py
+++ b/src/_griffe/cli.py
@@ -318,7 +318,7 @@ def add_subparser(command: str, text: str, **kwargs: Any) -> argparse.ArgumentPa
         help="Force disable colors in the output.",
     )
     check_options.add_argument("-v", "--verbose", action="store_true", help="Verbose output.")
-    formats = ("oneline", "verbose")
+    formats = [fmt.value for fmt in ExplanationStyle]
     check_options.add_argument("-f", "--format", dest="style", choices=formats, default=None, help="Output format.")
     add_common_options(check_parser)
 
diff --git a/src/_griffe/diff.py b/src/_griffe/diff.py
index 9b33b172..0cf8fce2 100644
--- a/src/_griffe/diff.py
+++ b/src/_griffe/diff.py
@@ -193,10 +193,46 @@ def _explain_verbose(self) -> str:
         return "\n".join(lines)
 
     def _explain_markdown(self) -> str:
-        return self._explain_oneline()
+        explanation = f"- `{self._canonical_path}`: *{self.kind.value}*"
+        old = self._format_old_value()
+        if old != "unset":
+            old = f"`{old}`"
+        new = self._format_new_value()
+        if new != "unset":
+            new = f"`{new}`"
+        if old and new:
+            change = f"{old} -> {new}"
+        elif old:
+            change = old
+        elif new:
+            change = new
+        else:
+            change = ""
+        if change:
+            return f"{explanation}: {change}"
+        return explanation
 
     def _explain_github(self) -> str:
-        return self._explain_oneline()
+        location = f"file={self._location},line={self._lineno}"
+        title = f"title={self._format_title()}"
+        explanation = f"::warning {location},{title}::{self.kind.value}"
+        old = self._format_old_value()
+        if old != "unset":
+            old = f"`{old}`"
+        new = self._format_new_value()
+        if new != "unset":
+            new = f"`{new}`"
+        if old and new:
+            change = f"{old} -> {new}"
+        elif old:
+            change = old
+        elif new:
+            change = new
+        else:
+            change = ""
+        if change:
+            return f"{explanation}: {change}"
+        return explanation
 
 
 class ParameterMovedBreakage(Breakage):