phase: 20.49 COMPLETE; 20.50 Flow+String minimal reps; 20.51 selfhost v0/v1 minimal (Option A/B); hv1-inline binop/unop/copy; docs + run_all + CURRENT_TASK -> 21.0

tools/selfhost/examples/gen_v1_compare_branch.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+# gen_v1_compare_branch.sh — minimal 2-block v1 JSON generator (compare/branch)
+# Program: if (3 < 5) return 1 else return 2
+set -euo pipefail
+cat <<'JSON'
+{
+  "schema_version": "1.0",
+  "functions": [
+    {"name": "main", "blocks": [
+      {"id": 0, "instructions": [
+        {"op":"const","dst":0,"value":{"type":"i64","value":3}},
+        {"op":"const","dst":1,"value":{"type":"i64","value":5}},
+        {"op":"compare","dst":2,"lhs":0,"rhs":1,"cmp":"Lt"},
+        {"op":"branch","cond":2,"then":1,"else":2}
+      ]},
+      {"id": 1, "instructions": [
+        {"op":"const","dst":3,"value":{"type":"i64","value":1}},
+        {"op":"ret","value":3}
+      ]},
+      {"id": 2, "instructions": [
+        {"op":"const","dst":4,"value":{"type":"i64","value":2}},
+        {"op":"ret","value":4}
+      ]}
+    ]}
+  ]
+}
+JSON