diff --git a/crates/tinymist-analysis/src/syntax/matcher.rs b/crates/tinymist-analysis/src/syntax/matcher.rs
index a99c4119..32f2451f 100644
--- a/crates/tinymist-analysis/src/syntax/matcher.rs
+++ b/crates/tinymist-analysis/src/syntax/matcher.rs
@@ -1088,6 +1088,18 @@ impl<'a> SyntaxContext<'a> {
             | SyntaxContext::Normal(node) => node.clone(),
         })
     }
+
+    /// Gets the argument container node.
+    pub fn arg_container(&self) -> Option<&LinkedNode<'a>> {
+        match self {
+            Self::Arg { args, .. }
+            | Self::Element {
+                container: args, ..
+            } => Some(args),
+            Self::Paren { container, .. } => Some(container),
+            _ => None,
+        }
+    }
 }
 
 /// Kind of argument source.
@@ -1342,6 +1354,37 @@ fn arg_context<'a>(
     }
 }
 
+/// The cursor is on an invalid position.
+pub enum BadCompletionCursor {
+    /// The cursor is outside of the argument list.
+    ArgListPos,
+}
+
+/// Checks if the cursor is on an invalid position for completion.
+pub fn bad_completion_cursor(
+    syntax: Option<&SyntaxClass>,
+    syntax_context: Option<&SyntaxContext>,
+    leaf: &LinkedNode,
+) -> Option<BadCompletionCursor> {
+    // The cursor is on `f()|`
+    if (matches!(syntax, Some(SyntaxClass::Callee(..))) && {
+        syntax_context
+            .and_then(SyntaxContext::arg_container)
+            .is_some_and(|container| {
+                container.rightmost_leaf().map(|s| s.offset()) == Some(leaf.offset())
+            })
+        // The cursor is on `f[]|`
+    }) || (matches!(
+        syntax,
+        Some(SyntaxClass::Normal(SyntaxKind::ContentBlock, _))
+    ) && matches!(leaf.kind(), SyntaxKind::RightBracket))
+    {
+        return Some(BadCompletionCursor::ArgListPos);
+    }
+
+    None
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/crates/tinymist-query/src/analysis/completion.rs b/crates/tinymist-query/src/analysis/completion.rs
index f1369586..a7dca8f7 100644
--- a/crates/tinymist-query/src/analysis/completion.rs
+++ b/crates/tinymist-query/src/analysis/completion.rs
@@ -10,6 +10,7 @@ use lsp_types::InsertTextFormat;
 use once_cell::sync::Lazy;
 use regex::{Captures, Regex};
 use serde::{Deserialize, Serialize};
+use tinymist_analysis::syntax::bad_completion_cursor;
 use tinymist_derive::BindTyCtx;
 use tinymist_project::LspWorld;
 use tinymist_std::path::unix_slash;
@@ -174,13 +175,7 @@ impl<'a> CompletionCursor<'a> {
         let syntax_context = classify_context(leaf.clone(), Some(cursor));
         let surrounding_syntax = surrounding_syntax(&leaf);
 
-        // todo: don't match here?
-        if matches!(syntax, Some(SyntaxClass::Callee(..)))
-            && matches!(syntax_context.as_ref(), Some(
-                SyntaxContext::Element { container, .. } |
-                SyntaxContext::Arg { args: container, .. } |
-                SyntaxContext::Paren { container, .. }) if container.rightmost_leaf().map(|s| s.offset()) == Some(leaf.offset()))
-        {
+        if bad_completion_cursor(syntax.as_ref(), syntax_context.as_ref(), &leaf).is_some() {
             return None;
         }
 
diff --git a/crates/tinymist-query/src/fixtures/completion/arg_range2.typ b/crates/tinymist-query/src/fixtures/completion/arg_range2.typ
new file mode 100644
index 00000000..9a2e607b
--- /dev/null
+++ b/crates/tinymist-query/src/fixtures/completion/arg_range2.typ
@@ -0,0 +1,2 @@
+/// contains: alignment
+#align()[/* range 0..1 */]
diff --git a/crates/tinymist-query/src/fixtures/completion/arg_range3.typ b/crates/tinymist-query/src/fixtures/completion/arg_range3.typ
new file mode 100644
index 00000000..3d6b04df
--- /dev/null
+++ b/crates/tinymist-query/src/fixtures/completion/arg_range3.typ
@@ -0,0 +1,2 @@
+/// contains: alignment
+#align()[]/* range 0..1 */
diff --git a/crates/tinymist-query/src/fixtures/completion/arg_range4.typ b/crates/tinymist-query/src/fixtures/completion/arg_range4.typ
new file mode 100644
index 00000000..2b04b2d2
--- /dev/null
+++ b/crates/tinymist-query/src/fixtures/completion/arg_range4.typ
@@ -0,0 +1,4 @@
+/// contains: alignment
+#align()[
+
+]/* range 0..1 */
diff --git a/crates/tinymist-query/src/fixtures/completion/arg_range5.typ b/crates/tinymist-query/src/fixtures/completion/arg_range5.typ
new file mode 100644
index 00000000..0402fbaa
--- /dev/null
+++ b/crates/tinymist-query/src/fixtures/completion/arg_range5.typ
@@ -0,0 +1,4 @@
+/// contains: alignment
+#align()[/* range 0..1 */
+
+]
diff --git a/crates/tinymist-query/src/fixtures/completion/bracket_strong_delta.typ b/crates/tinymist-query/src/fixtures/completion/bracket_strong_delta.typ
index 5b33fed4..725fdc09 100644
--- a/crates/tinymist-query/src/fixtures/completion/bracket_strong_delta.typ
+++ b/crates/tinymist-query/src/fixtures/completion/bracket_strong_delta.typ
@@ -1,3 +1,3 @@
 /// contains: delta
 
-#strong(/* range after 1..2 */[];
+#strong(/* range 0..1 */[];
diff --git a/crates/tinymist-query/src/fixtures/completion/bracket_strong_delta2.typ b/crates/tinymist-query/src/fixtures/completion/bracket_strong_delta2.typ
index a06df5ef..25777678 100644
--- a/crates/tinymist-query/src/fixtures/completion/bracket_strong_delta2.typ
+++ b/crates/tinymist-query/src/fixtures/completion/bracket_strong_delta2.typ
@@ -1,3 +1,3 @@
 /// contains: delta
 
-#strong(/* range after 1..2 */[]);
+#strong(/* range 0..1 */[]);
diff --git a/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range2.typ.snap b/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range2.typ.snap
new file mode 100644
index 00000000..c45ca000
--- /dev/null
+++ b/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range2.typ.snap
@@ -0,0 +1,31 @@
+---
+source: crates/tinymist-query/src/completion.rs
+description: Completion on / (33..34)
+expression: "JsonRepr::new_pure(results)"
+input_file: crates/tinymist-query/src/fixtures/completion/arg_range2.typ
+---
+[
+ {
+  "isIncomplete": false,
+  "items": [
+   {
+    "kind": 15,
+    "label": "alignment",
+    "sortText": "000",
+    "textEdit": {
+     "newText": "${1:alignment}",
+     "range": {
+      "end": {
+       "character": 9,
+       "line": 1
+      },
+      "start": {
+       "character": 9,
+       "line": 1
+      }
+     }
+    }
+   }
+  ]
+ }
+]
diff --git a/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range3.typ.snap b/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range3.typ.snap
new file mode 100644
index 00000000..888f6e9f
--- /dev/null
+++ b/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range3.typ.snap
@@ -0,0 +1,9 @@
+---
+source: crates/tinymist-query/src/completion.rs
+description: Completion on / (34..35)
+expression: "JsonRepr::new_pure(results)"
+input_file: crates/tinymist-query/src/fixtures/completion/arg_range3.typ
+---
+[
+ null
+]
diff --git a/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range4.typ.snap b/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range4.typ.snap
new file mode 100644
index 00000000..f00cdf13
--- /dev/null
+++ b/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range4.typ.snap
@@ -0,0 +1,9 @@
+---
+source: crates/tinymist-query/src/completion.rs
+description: Completion on / (36..37)
+expression: "JsonRepr::new_pure(results)"
+input_file: crates/tinymist-query/src/fixtures/completion/arg_range4.typ
+---
+[
+ null
+]
diff --git a/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range5.typ.snap b/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range5.typ.snap
new file mode 100644
index 00000000..70a9f7b8
--- /dev/null
+++ b/crates/tinymist-query/src/fixtures/completion/snaps/test@arg_range5.typ.snap
@@ -0,0 +1,31 @@
+---
+source: crates/tinymist-query/src/completion.rs
+description: Completion on / (33..34)
+expression: "JsonRepr::new_pure(results)"
+input_file: crates/tinymist-query/src/fixtures/completion/arg_range5.typ
+---
+[
+ {
+  "isIncomplete": false,
+  "items": [
+   {
+    "kind": 15,
+    "label": "alignment",
+    "sortText": "000",
+    "textEdit": {
+     "newText": "${1:alignment}",
+     "range": {
+      "end": {
+       "character": 9,
+       "line": 1
+      },
+      "start": {
+       "character": 9,
+       "line": 1
+      }
+     }
+    }
+   }
+  ]
+ }
+]
diff --git a/crates/tinymist-query/src/fixtures/completion/snaps/test@bracket_strong_delta.typ.snap b/crates/tinymist-query/src/fixtures/completion/snaps/test@bracket_strong_delta.typ.snap
index 79c4cf29..5ea49e54 100644
--- a/crates/tinymist-query/src/fixtures/completion/snaps/test@bracket_strong_delta.typ.snap
+++ b/crates/tinymist-query/src/fixtures/completion/snaps/test@bracket_strong_delta.typ.snap
@@ -1,6 +1,6 @@
 ---
 source: crates/tinymist-query/src/completion.rs
-description: "Completion on ] (52..53)"
+description: Completion on / (29..30)
 expression: "JsonRepr::new_pure(results)"
 input_file: crates/tinymist-query/src/fixtures/completion/bracket_strong_delta.typ
 ---
@@ -19,11 +19,11 @@ input_file: crates/tinymist-query/src/fixtures/completion/bracket_strong_delta.t
      "newText": "delta: ${1:})",
      "range": {
       "end": {
-       "character": 31,
+       "character": 8,
        "line": 2
       },
       "start": {
-       "character": 31,
+       "character": 8,
        "line": 2
       }
      }
diff --git a/crates/tinymist-query/src/fixtures/completion/snaps/test@bracket_strong_delta2.typ.snap b/crates/tinymist-query/src/fixtures/completion/snaps/test@bracket_strong_delta2.typ.snap
index 91251ed9..52e9b5ec 100644
--- a/crates/tinymist-query/src/fixtures/completion/snaps/test@bracket_strong_delta2.typ.snap
+++ b/crates/tinymist-query/src/fixtures/completion/snaps/test@bracket_strong_delta2.typ.snap
@@ -1,6 +1,6 @@
 ---
 source: crates/tinymist-query/src/completion.rs
-description: "Completion on ] (52..53)"
+description: Completion on / (29..30)
 expression: "JsonRepr::new_pure(results)"
 input_file: crates/tinymist-query/src/fixtures/completion/bracket_strong_delta2.typ
 ---
@@ -19,11 +19,11 @@ input_file: crates/tinymist-query/src/fixtures/completion/bracket_strong_delta2.
      "newText": "delta: ${1:}",
      "range": {
       "end": {
-       "character": 31,
+       "character": 8,
        "line": 2
       },
       "start": {
-       "character": 31,
+       "character": 8,
        "line": 2
       }
      }