diff --git a/amplifier_web/host/mentions.py b/amplifier_web/host/mentions.py
index b429019b2..d3d89d05e 100644
--- a/amplifier_web/host/mentions.py
+++ b/amplifier_web/host/mentions.py
@@ -31,6 +31,10 @@ def __init__(self, foundation, workspace):
         self.workspace = Path(workspace)
 
     def resolve(self, mention):
+        return self.resolve_relative(mention, self.workspace)
+
+    def resolve_relative(self, mention, relative_to):
+        """Scope local references without retargeting project/user shortcuts."""
         if not mention.startswith('@') or '..' in mention:
             return None
         body = mention[1:]
@@ -46,8 +50,8 @@ def resolve(self, mention):
             return self.foundation.resolve(mention) if self.foundation else None
         else:
             # Retain Foundation's plain-path and omitted-.md behavior used by
-            # filesystem tools, scoped to this session's workspace.
-            return BaseMentionResolver(base_path=self.workspace).resolve(mention)
+            # filesystem tools, scoped to the workspace or referring file.
+            return BaseMentionResolver(base_path=relative_to).resolve(mention)
         if not relative:
             return None
         path = root / relative
diff --git a/tests/test_runtime_mentions.py b/tests/test_runtime_mentions.py
index b9c29f814..0d99a597b 100644
--- a/tests/test_runtime_mentions.py
+++ b/tests/test_runtime_mentions.py
@@ -19,6 +19,23 @@ def coordinator(workspace, bundles=None):
     return value
 
 
+def test_per_call_relative_scope_preserves_session_shortcuts(tmp_path, monkeypatch):
+    workspace, nested, user, bundle = (tmp_path / name for name in ('workspace', 'nested', 'user', 'bundle'))
+    for path in (workspace / '.amplifier', nested, user, bundle):
+        path.mkdir(parents=True)
+        (path / 'rules.md').write_text(str(path))
+    monkeypatch.setenv('AMPLIFIER_HOME', str(user))
+    owner = coordinator(workspace, {'bundle': Bundle(name='bundle', base_path=bundle)})
+    resolver = owner.get_capability('mention_resolver')
+    assert resolver.resolve_relative('@./rules.md', nested) == nested / 'rules.md'
+    assert resolver.resolve_relative('@project:rules.md', nested) == workspace / '.amplifier/rules.md'
+    assert resolver.resolve_relative('@user:rules.md', nested) == user / 'rules.md'
+    assert resolver.resolve_relative('@bundle:rules.md', nested) == bundle / 'rules.md'
+    assert resolver.resolve_relative('@../rules.md', nested) is None
+    assert resolver.workspace == workspace
+    assert resolver.resolve('@./rules.md') is None
+
+
 async def test_workspace_shortcuts_and_composed_namespace_use_shared_expander(tmp_path, monkeypatch):
     workspace = tmp_path / 'workspace'
     bundle = tmp_path / 'bundle'