pyvm: implement TypeOp(check) + strict match-guard smokes; parser: guard support in match; llvm: PHI wiring at block head + incoming normalization; docs: AGENTS LLVM/PHI + guard policy; add tests; plan: refactor parse_box_declaration + TODO triage + clone reduction + CLI split + LLVM builder split; update CURRENT_TASK.md

apps/tests/match_guard_lit_basic.nyash

@@ -0,0 +1,12 @@
+static box Main {
+  main(args) {
+    local d = 1
+    local r = match d {
+      1 if (0 == 1) => { print("no") 7 }
+      1 => { print("yes") 9 }
+      _ => 0
+    }
+    return r
+  }
+}
+

apps/tests/match_guard_type_basic.nyash

@@ -0,0 +1,13 @@
+static box Main {
+  main(args) {
+    local x = "hello"
+    // Expect to match type arm and pass guard (length > 3)
+    local r = match x {
+      StringBox(s) if s.length() > 3 => { print("gt3") 1 }
+      StringBox(s) if s.length() > 10 => { print("gt10") 2 }
+      _ => { print("other") 0 }
+    }
+    return r
+  }
+}
+