docs: mark GeoEdge.discord as design-branch-only, not on dev

The line references were correct but silently implied the code was on dev.
It is on design/correspondence-and-censorship (a8845e1). On dev,
co_registration is still at engram_geometry.h:79 with its original comment
and still unread by anything.

AGENTS.md

@@ -96,9 +96,10 @@ manifest materializes a property as a stored artifact and enumerates instances o
 something that has six. A sweep over regions is a supervisor — nothing in a mind
 scans its neighbourhoods to find what is surprising; the surprise captures
 attention. The nucleation site is per-edge:
-`discord = z(semantic proximity) − z(association strength)`
-(`lang/runtime/engram_geometry.h:43–47`), and `|discord|` *is* the nucleation
-strength — no threshold to compare it against. The region-level aggregate
+`discord = z(semantic proximity) − z(association strength)`, and `|discord|` *is*
+the nucleation strength — no threshold to compare it against. **Not on `dev` yet:**
+`GeoEdge.discord` is on branch `design/correspondence-and-censorship`
+(`a8845e1`), at `lang/runtime/engram_geometry.h:43–47`. The region-level aggregate
 `GeoDescriptor.co_registration` is **deprecated**: it averaged a per-edge property
 into one scalar, so opposing sites cancelled (measured: 375 reified
 neighbourhoods, 340 positive, **31 at zero**, 4 negative). It survives only

engram/README.md

@@ -181,7 +181,7 @@ There are about **six** wonders, they are the same for everyone, and they never
 
 **Measured:** 375 live reified neighbourhoods — 340 positive, **31 at zero**, 4 negative. Read as a count of things to be curious about, that says "four." Read correctly, four disagreements were lopsided enough to survive averaging and the 31 zeros are where opposing sites cancelled.
 
-The replacement is per-edge (`engram_geometry.h:43–47`, `engram_geometry.c:454–473`):
+The replacement is per-edge. **Not on `dev` yet** — `GeoEdge.discord` and the `DEPRECATED` marker on `co_registration` live on branch `design/correspondence-and-censorship` (commit `a8845e1`), at `engram_geometry.h:43–47` / `engram_geometry.c:454–473` there. On `dev`, `GeoDescriptor.co_registration` is still at `engram_geometry.h:79` carrying its original "surprising links / dream cands" comment and still nothing reads it.
 
 ```
 discord = z(semantic proximity) − z(association strength)

engram/spec/cognitive-architecture.design.md

@@ -584,7 +584,9 @@ Consequences, all of which are *features*:
   >
   > The disagreement therefore goes back on the edge, where the loop that computed
   > the aggregate already had both halves and discarded them
-  > (`lang/runtime/engram_geometry.h:43–47`, `engram_geometry.c:454–473`):
+  > (**not on `dev`** — branch `design/correspondence-and-censorship`, commit
+  > `a8845e1`: `lang/runtime/engram_geometry.h:43–47`,
+  > `engram_geometry.c:454–473`):
   > `discord = z(semantic proximity) − z(association strength)`, standardized within
   > the region from accumulators already gathered — no second statistic, no
   > constant, **no threshold**. `|discord|` *is* the nucleation strength and raises