diff --git a/litellm/managed_agents/adapters/registry.py b/litellm/managed_agents/adapters/registry.py
new file mode 100644
index 00000000000..00de988f937
--- /dev/null
+++ b/litellm/managed_agents/adapters/registry.py
@@ -0,0 +1,25 @@
+"""Adapter registry — selects the right adapter for a sandbox type.
+
+Today ships only `"opencode"`. Adding a new sandbox provider means adding
+a new module under `litellm/managed_agents/adapters/` and registering it
+here — no other code change is required (the public API stays the same;
+the `sandbox.type` field selects the adapter).
+"""
+
+from litellm.managed_agents.adapters.base import SandboxAdapter
+from litellm.managed_agents.adapters.opencode import OpencodeAdapter
+
+# Single shared instance — adapters are stateless, so this is safe and
+# avoids per-request allocation.
+_OPENCODE = OpencodeAdapter()
+
+
+def get_adapter(sandbox_type: str) -> SandboxAdapter:
+    """Return the adapter for a given `sandbox.type`.
+
+    Raises `ValueError` for unknown sandbox types so the endpoint handler
+    can translate to a 422 response.
+    """
+    if sandbox_type == "opencode":
+        return _OPENCODE
+    raise ValueError(f"Unknown sandbox type: {sandbox_type!r}")