RSDK-13355: remove reconfigure

[aldenh-viam]

Modules no longer need to implement Reconfigure after viamrobotics/rdk#5811, since ReconfigureResource will not be called by viam-server anymore and it will instead always close (RemoveResource) and recreate (AddResource) the resource.

[aldenh-viam]

Should we remove this class completely? Or not, because it would crash at runtime for users who bump the SDK version but forget to remove it from their code?

[njooma]

Let's keep it for now, but can you add a deprecated warning to it please?

[aldenh-viam]

You mean use __init_subclass__ or something so it prints at runtime when something subclasses this?

[njooma]

Yeah exactly. Not sure if __init_subclass__ works for protocols. If not, maybe we do just remove the protocl. I think it's been removed in the other SDKs already, correct?

[aldenh-viam]

__init_subclass__ works for me:

$ python3 -W always  # always show warnings
Python 3.13.12 (main, Feb  3 2026, 17:53:27) [GCC 15.2.0] on linux
>>> from viam.module.types import Reconfigurable
>>> class Test(Reconfigurable):
...     pass
...
<frozen abc>:106: DeprecationWarning: Reconfigure is deprecated, and resources will always rebuild. It is not necessary to implement Reconfigurable.

$ git diff src/viam/module/types.py
diff --git a/src/viam/module/types.py b/src/viam/module/types.py
index 4930653426..3ac0e77067 100644
--- a/src/viam/module/types.py
+++ b/src/viam/module/types.py
@@ -1,9 +1,12 @@
 from typing import Any, Mapping, Optional, Protocol, runtime_checkable
+import warnings


 @runtime_checkable
 class Reconfigurable(Protocol):
     """The Reconfigurable protocol defines the requirements for making a resource Reconfigurable"""
+    def __init_subclass__(*args, **kwargs):
+        warnings.warn("Reconfigure is deprecated, and resources will always rebuild. It is not necessary to implement Reconfigurable.", DeprecationWarning, stacklevel=2)

I think it's been removed in the other SDKs already, correct?

Yes, it's completely removed in C++ already, and will be in Go once the main PR gets merged.

[njooma]

Looks good! 2 things:

1. Add the deprecated warning to Reconfigurable protocol
2. Can you do a search over the python repo for reconfigure? There are still a few places in (particularly docs) where we have outdated information

[njooma]

Let's keep it for now, but can you add a deprecated warning to it please?

[stuqdog]

lgtm, modulo Naveed's comments.

[njooma]

@aldenh-viam checking in on status -- trying to avoid becoming stale

[aldenh-viam]

@aldenh-viam checking in on status -- trying to avoid becoming stale

LMK about my question in the above thread. Are you looking for a deprecation warning to print at runtime or just a comment? I searched the repo, but can't tell if there's an existing style I should follow.