agentic-sx Phase 1: schema — typed agentic objects over sx-git store (TDD)

Type registry (briefing / console-trace / behaviour TAG / agent-commit +
spawn/finding/refactor/test/session-merge/decision subtypes) with reflexive
transitive is-a? and create-only register-type!. Agent commits ARE git
commits (:agent-type rides as an open field, participates in the CID, DAG
machinery applies unchanged). 65/65.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

lib/agentic/scoreboard.json

@@ -0,0 +1,8 @@
+{
+  "suites": {
+    "schema": {"pass": 65, "fail": 0}
+  },
+  "total_pass": 65,
+  "total_fail": 0,
+  "total": 65
+}