diff --git a/openspec/config.yaml b/openspec/config.yaml
index c4d34ac..34a3b8c 100644
--- a/openspec/config.yaml
+++ b/openspec/config.yaml
@@ -1,5 +1,24 @@
 schema: spec-driven
 
+context: |
+  This repository is the NenjimHub reference implementation and currently
+  also acts as Cauldron for the wider r35157 ecosystem.
+
+  New module code initially lives in this repository while it is immature.
+  Packages shall nevertheless reflect the module that logically owns the code.
+
+  When a module becomes stable, its API, test contract, and implementations
+  may be extracted into separate repositories and artifacts.
+
+  The current physical location of code must therefore not be interpreted
+  as permanent module ownership.
+
+  Public APIs and reference implementations must remain separated by package,
+  even while they temporarily coexist in this repository.
+
+  Do not add automated tests unless the change explicitly requests them.
+  General implementation tests will normally belong to a separate test artifact.
+
 # Project context (optional)
 # This is shown to AI when creating artifacts.
 # Add your tech stack, conventions, style guides, domain knowledge, etc.