diff --git a/docs/source/release_035_validation.rst b/docs/source/release_035_validation.rst
new file mode 100644
index 0000000..b58bfbc
--- /dev/null
+++ b/docs/source/release_035_validation.rst
@@ -0,0 +1,51 @@
+ArrayBridge 0.3.5 release preparation
+===================================
+
+Parent integration owner; base ea3f2a4cc91c4810d12343f58f85c1195e1a41e6.
+The reviewed callable-native dtype default and durable decorator-context
+changes are already merged through PR2 and PR3. This release preparation changes
+only the existing package version authority from 0.3.4 to 0.3.5 and records
+validation. It adds no implementation, compatibility API or parallel registry.
+
+OpenHCS PR217 requires ``dtype_config_default``. A fresh PyPI ArrayBridge0.3.4
+wheel raises TypeError at its BaSiC adapter's decoration. Its recorded local
+source candidate has that API, but is not a public release. OpenHCS now requires
+ArrayBridge>=0.3.5,<0.4 so ordinary installation cannot select the old API.
+
+Persistent evidence::
+
+    /home/ts/wt/openhcs-issue-batch-20260929/artifact-parent-20261001
+
+Focused provider-free checks, using the existing Python3.12 environment::
+
+    PYTHONPATH=src PYTEST_DISABLE_PLUGIN_AUTOLOAD=1 python -B -m pytest \
+      -o addopts='' -q tests/test_callable_dtype_default.py \
+      tests/test_durable_decorator_context.py
+
+All seven tests pass in 0.12 seconds. They retain native floating-point values,
+explicit runtime dtype overrides, unchanged default preservation, rejection of
+untyped declarations and durable serialization without thread-local leakage.
+The original complete-suite acceptance of the reviewed feature PRs is separate;
+these seven checks do not claim a full framework/GPU matrix.
+
+The wheel was built through ``uv build --offline --wheel`` from this source
+using cached build requirements. Twine6.2 accepts the resulting metadata2.4
+wheel. An initial no-isolation build lacked Hatchling in the installed OpenHCS
+environment and failed; it did not install packages or count as a pass.
+
+A fresh process loaded that exact 0.3.5 wheel archive ahead of the actual
+installed OpenHCS candidate and executed the real BaSiC adapter on 24 synthetic
+32x32 SITE observations. It returned finite float32 correction with fractional
+pixels, preserved source pixels and matched the same-fit correction formula.
+Flatfield RMSE against the known synthetic shading field is 0.0007167315491296268.
+``arraybridge-035-installed-fit.log`` records the actual wheel and site-packages
+import paths. This establishes local wheel/API interoperability, not registry
+resolution, a full installed MCP rerun or biological accuracy. The separate
+installed MCP journey is retained with OpenHCS PR217.
+
+Publication is not performed by this PR. The parent requested separate owner
+approval for the companion ArrayBridge0.3.5 publication. No tag was created,
+workflow dispatched, registry upload performed or release availability claimed.
+After approval, merge normally, tag the reviewed main version and use the
+existing trusted publishing workflow. Verify the actual registry wheel before
+claiming ordinary OpenHCS dependency installation.
diff --git a/src/arraybridge/__init__.py b/src/arraybridge/__init__.py
index 3e21813..8896fd8 100644
--- a/src/arraybridge/__init__.py
+++ b/src/arraybridge/__init__.py
@@ -10,7 +10,7 @@
 NumPy/numcodecs import cost.
 """
 
-__version__ = "0.3.4"
+__version__ = "0.3.5"
 
 _LAZY_EXPORTS: dict[str, str] = {
     "MemoryType": ".types",