Record architecture decisions: thin git plane, live default, upgrades

D1 thin dir+git with shard-wiki then kontextual upgrade path; D2 defer
asset-store; D3 NetKingdom authz consolidation; D4 outline explode/implode
and live-by-default includes with pin as exception.

docs/capability/model-v0.yaml

@@ -121,9 +121,20 @@ capabilities:
         title: Stale badge with generate alternative then replace or keep
         status: todo
         notes: "docs/architecture/stale-derived-content.md; markitect derived slots"
-      - id: feat.derived-include-pin
-        title: Pinned include/pipeline snapshots with same stale/replace grammar
+      - id: feat.include-live-default
+        title: Live includes by default (spreadsheet-like up-to-date resolve)
         status: todo
+      - id: feat.derived-include-pin
+        title: Optional pin; stale badge with generate alternative then replace or keep
+        status: todo
+      - id: feat.outline-explode-implode
+        title: Outline-editor explode into connected docs and implode back
+        status: todo
+        notes: "markitect explode/implode; ArchitectureBlueprint D4"
+      - id: feat.content-plane-thin-git
+        title: Content SoR as directory + markdown files in git
+        status: todo
+        notes: "Upgrades to shard-wiki then kontextual supported later"
       - id: feat.content-fail-closed
         title: Fail closed on missing binding/fetch
         status: shipped