Edit > OCIO Settings >
Render Working Space: ACEScg
View Transform: ACES 1.0 - SDR Video
File Rules > exr > Color Space: ACEScg
You need to restart Houdini for the changes to take effect.
Project Settings > Color Management >
Color Science: ACEScct
ACES version: ACES 1.3
ACES Input Transform: ACEScg - CSC
ACES Output Transform: sRGB
Append an ACES Transform node, and use these settings:
Project Settings > Color:
Color Engine: OCIO color managed
OCIO Configuration: ACES 1.3 CG v1.0
Working Color Space: scene_linear: ACEScg