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_threeblock_collect.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# gen_v1_threeblock_collect.sh — v1 JSON: 3-block collect → rc=44 on then-path
+set -euo pipefail
+cat <<'JSON'
+{
+  "schema_version": "1.0",
+  "functions": [
+    {"name": "main", "blocks": [
+      {"id":0,"instructions":[
+        {"op":"const","dst":1,"value":{"type":"i64","value":3}},
+        {"op":"const","dst":2,"value":{"type":"i64","value":5}},
+        {"op":"compare","dst":3,"lhs":1,"rhs":2,"cmp":"Lt"},
+        {"op":"branch","cond":3,"then":1,"else":2}
+      ]},
+      {"id":1,"instructions":[
+        {"op":"const","dst":4,"value":{"type":"i64","value":44}},
+        {"op":"jump","target":3}
+      ]},
+      {"id":2,"instructions":[
+        {"op":"const","dst":4,"value":{"type":"i64","value":40}},
+        {"op":"jump","target":3}
+      ]},
+      {"id":3,"instructions":[{"op":"ret","value":4}]}
+    ]}
+  ]
+}
+JSON
+