Denial is not absence — detection learns the unverifiable answer 06 ruled for it

Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy

KanbanTests/BoardInfoPopoverTests.swift

@@ -66,6 +66,18 @@ struct BoardGitSectionTests {
         #expect(section != .noRepository)
     }
 
+    @Test("An unverifiable board gets its own posture — structurally like nested, never the same case")
+    func unverifiableIsItsOwnPostureNotRepoNested() {
+        // "Denial is not absence" (06 ▸ Rules ▸ Detection, ruled 2026-07-31): a denied ancestor check
+        // is not a found repository, so the two must resolve to different cases even though both are
+        // action-less, prose-only sections.
+        let section = BoardGitSection.resolve(tier: .pro, mode: .unverifiable, hasGitDirectory: false)
+
+        #expect(section == .unverifiable)
+        #expect(section != .repoNested, "a denial is not a nesting")
+        #expect(section != .noRepository)
+    }
+
     @Test("Every posture is reachable, and none of them is two postures")
     func theMatrixIsTotal() {
         let resolved = Set(
@@ -129,7 +141,7 @@ struct BoardInfoTitlebarSummaryTests {
         }
     }
 
-    @Test("An inert .git under Pro — mode none or repo-nested — never shows a branch")
+    @Test("An inert .git under Pro — mode none, repo-nested, or unverifiable — never shows a branch")
     func inertGitNeverShowsABranch() {
         #expect(
             BoardInfoTitlebarSummary(snapshotTitle: nil, rootURL: root, tier: .pro, mode: .none, branch: "main").branch == nil
@@ -138,6 +150,10 @@ struct BoardInfoTitlebarSummaryTests {
             BoardInfoTitlebarSummary(snapshotTitle: nil, rootURL: root, tier: .pro, mode: .repoNested, branch: "main").branch
                 == nil
         )
+        #expect(
+            BoardInfoTitlebarSummary(snapshotTitle: nil, rootURL: root, tier: .pro, mode: .unverifiable, branch: "main").branch
+                == nil
+        )
     }
 
     @Test("A git-mode board whose branch has not been read yet shows none, honestly")