diff --git a/CHANGELOG.md b/CHANGELOG.md
index 35b72cc..1b0fc62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -26,3 +26,6 @@ This release marks the transition from a skill-only continuity package to a
 
 ### Pending
 - Experiment C (compaction-path verification) remains pending because no real compaction event was triggered in the earlier pressure test
+
+### Known limitation in this alpha
+- Reliable continuity recovery is currently validated for resident subagents, **not** for Discord main/channel/thread sessions. Fresh Discord tests did not preserve short facts or concrete working-state details across new sessions.
diff --git a/README.md b/README.md
index db505b4..8f0d5ef 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,15 @@ That is the problem this skill solves.
 
 ## Current architecture stance
 
+> **Alpha support boundary (`v0.3.0-probe`)**
+>
+> Currently validated:
+> - resident subagent startup continuity
+>
+> Not currently supported / not yet validated for reliable recovery:
+> - Discord main/channel/thread continuity
+>
+
 This repository should now be understood as a **continuity package**, not just a standalone skill.
 
 ### Included forms