run 28

docs/pt2-state-map.md

@@ -142,6 +142,11 @@ Observed:
 - bare heartbeat + `E9` produced `7A 28 D3`
 - bare heartbeat + `EC` did not open `7B`; it stayed in heartbeat-family
   behavior
+- later downstream-behavior tests showed opener choice can also bias which
+  sibling family appears at the selector result itself:
+  - `90 + E8` produced `7A 58 26`
+  - `90 + EC` produced `FB 50 26`
+  - `AF + EC` preserved `7B 50 26`
 
 Nuance:
 
@@ -151,6 +156,8 @@ Nuance:
   earlier `A0 + E9` runs produced `07 80 7A 28 D3 5C`.
 - `EC` appears stricter than `E8/E9`, because heartbeat alone was enough for
   `E8/E9` but not for `EC`.
+- opener choice has a stronger observed effect on branch entry than on
+  downstream reply handling
 
 Confidence: high that a context-opener family exists; medium-high on the exact
 rules for each selector.
@@ -198,7 +205,8 @@ What we know:
   - `A0`
   - `90`
   - bare heartbeat
-- `AF` shifted this branch to sibling `FA 50 26 51`
+- `AF` has at least once shifted this branch to sibling `FA 50 26 51`
+- `90` has at least once shifted this branch to sibling `7A 58 26 D9`
 
 Read:
 
@@ -270,6 +278,7 @@ Read:
 - `7B` is the most stable downstream family on this branch
 - `FB` is real but currently looks like a sibling observation, not a clear reply
   target
+- opener choice can bias `EC` between `7B` and `FB`
 
 Confidence: medium
 
@@ -294,6 +303,8 @@ What is still missing:
 
 - the transition from any of these branches into a stable active/session state
 - a deterministic multi-turn reply ladder
+- evidence that the downstream family frames are actually prompts the host is
+  expected to answer, rather than readable blocks with no immediate follow-up
 
 ## What Feels Stable Right Now