diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ad82c7a..3c05d4c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -50,7 +50,7 @@ jobs:
       - name: Install
         run: |
           python -m pip install --upgrade pip
-          python -m pip install -e ".[dev]"
+          python -m pip install --constraint requirements-ci.txt -e ".[dev]"
 
       - name: Run tests
         run: pytest --cov=formbridge --cov-report=term-missing -v
@@ -70,7 +70,7 @@ jobs:
       - name: Install
         run: |
           python -m pip install --upgrade pip
-          python -m pip install -e ".[dev]"
+          python -m pip install --constraint requirements-ci.txt -e ".[dev]"
 
       - name: Ruff
         run: ruff check src tests --output-format=github
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 588f841..bee7eff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,16 @@
 # Changelog
 
+## 0.1.2
+
+Requires ObjectState 3 (`objectstate>=3.0,<4`).
+
+- `strategies.preview_formatting` reads a config group's abbreviation with
+  `objectstate.lazy_factory.get_group_abbreviation`, the one owner of that
+  lookup in ObjectState 3 (`GROUP_ABBREVIATIONS_REGISTRY` is removed there).
+  The module's own copy of the lookup is deleted; the name
+  `formbridge.strategies.preview_formatting.get_group_abbreviation` is now
+  ObjectState's function.
+
 ## 0.1.1
 
 Added:
diff --git a/pyproject.toml b/pyproject.toml
index ff435c1..73b59e4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ keywords = ["forms", "reactive", "dataclass", "ui-bridge", "headless"]
 dependencies = [
     "docutils>=0.20",
     "metaclass-registry>=0.1.5",
-    "objectstate>=2.0,<3",
+    "objectstate>=3.0,<4",
     "psutil>=5.9",
     "python-introspect>=0.2.7,<0.3",
     "pyzmq>=22.0",
diff --git a/requirements-ci.txt b/requirements-ci.txt
new file mode 100644
index 0000000..14a296b
--- /dev/null
+++ b/requirements-ci.txt
@@ -0,0 +1,2 @@
+# Source candidates needed to validate this checkout before coordinated publication.
+# Empty: every first-party dependency is released (objectstate 3.0.0).
diff --git a/src/formbridge/__init__.py b/src/formbridge/__init__.py
index d127046..088e276 100644
--- a/src/formbridge/__init__.py
+++ b/src/formbridge/__init__.py
@@ -4,4 +4,4 @@
 nothing and loads no GUI toolkit.
 """
 
-__version__ = "0.1.1"
+__version__ = "0.1.2"
diff --git a/src/formbridge/strategies/preview_formatting.py b/src/formbridge/strategies/preview_formatting.py
index 0df6e69..07da0f4 100644
--- a/src/formbridge/strategies/preview_formatting.py
+++ b/src/formbridge/strategies/preview_formatting.py
@@ -7,11 +7,11 @@
 from typing import TYPE_CHECKING, TypeAlias
 
 from objectstate import DottedFieldPath, ParameterOwner
+from objectstate.lazy_factory import get_group_abbreviation
 
 from formbridge.utils.preview_formatters import (
     PreviewFieldFormatRequest,
     PreviewValueDetail,
-    canonical_declaration_mro,
     format_preview_value,
 )
 
@@ -23,17 +23,6 @@
 ItemValueFormatter: TypeAlias = Callable[[object], str | None]
 
 
-def get_group_abbreviation(config_type: type) -> str:
-    """Resolve a group abbreviation from the canonical declaration MRO."""
-    from objectstate.lazy_factory import GROUP_ABBREVIATIONS_REGISTRY
-
-    for declaration_type in canonical_declaration_mro(config_type):
-        abbreviation = GROUP_ABBREVIATIONS_REGISTRY.get(declaration_type)
-        if abbreviation is not None:
-            return abbreviation
-    return config_type.__name__.split("_", 1)[0]
-
-
 @dataclass(frozen=True, slots=True)
 class FormattingConfig:
     """List-preview presentation derived from declared fields and ObjectState.
diff --git a/tests/test_preview_formatter_registry.py b/tests/test_preview_formatter_registry.py
index 66f0afe..132c663 100644
--- a/tests/test_preview_formatter_registry.py
+++ b/tests/test_preview_formatter_registry.py
@@ -55,3 +55,25 @@ class BaseConfig:
     )
 
     assert PreviewFormatterRegistry.format_field(lazy_type(), "value") == "base"
+
+
+def test_group_heading_default_reads_the_objectstate_declaration() -> None:
+    from objectstate.lazy_factory import abbreviation, get_group_abbreviation
+
+    from formbridge.strategies.preview_formatting import FormattingConfig
+
+    @abbreviation("cfg")
+    @dataclass
+    class HeadedConfig:
+        value: int = 0
+
+    class SpecializedHeadedConfig(HeadedConfig):
+        pass
+
+    lazy_type = LazyDataclassFactory.make_lazy_simple(HeadedConfig, "LazyHeadedConfig")
+    heading = FormattingConfig().container_abbr_func
+
+    assert heading is get_group_abbreviation
+    assert heading(HeadedConfig) == "cfg"
+    assert heading(SpecializedHeadedConfig) == "cfg"
+    assert heading(lazy_type) == "cfg"