restore(lang): full lang tree from ff3ef452 (306 files) — compiler, vm, shared, runner, c-abi, etc.\n\n- Restores lang/ directory (files≈306, dirs≈64) as per historical branch with selfhost sources\n- Keeps our recent parser index changes in compiler/* (merged clean by checkout)\n- Unblocks selfhost development and documentation references

lang/src/vm/json_loader.hako

@@ -0,0 +1,50 @@
+// MiniJsonLoader (Stage-B scaffold)
+// Purpose: centralize minimal JSON cursor ops for Mini-VM.
+// Implementation note: For now we delegate to local MiniJsonCur-compatible
+// helpers. In a later step, this can be swapped to use `apps/libs/json_cur.hako`
+// (JsonCursorBox) without touching Mini-VM call sites.
+
+static box MiniJsonLoader {
+  read_quoted_from(s, pos) {
+    // Local fallback (same behavior as MiniJsonCur.read_quoted_from)
+    // Keep in sync with Mini-VM until libs adoption gate is enabled.
+    local i = pos
+    if s.substring(i, i+1) != "\"" { return "" }
+    i = i + 1
+    local out = ""
+    local n = s.size()
+    loop (i < n) {
+      local ch = s.substring(i, i+1)
+      if ch == "\"" { break }
+      if ch == "\\" { i = i + 1  ch = s.substring(i, i+1) }
+      out = out + ch
+      i = i + 1
+    }
+    return out
+  }
+  read_digits_from(s, pos) {
+    local out = ""
+    local i = pos
+    if i == null { return out }
+    if i < 0 { return out }
+    loop (true) {
+      local ch = s.substring(i, i+1)
+      if ch == "" { break }
+      if ch == "0" || ch == "1" || ch == "2" || ch == "3" || ch == "4" || ch == "5" || ch == "6" || ch == "7" || ch == "8" || ch == "9" {
+        out = out + ch
+        i = i + 1
+      } else { break }
+    }
+    return out
+  }
+  next_non_ws(s, pos) {
+    local i = pos
+    local n = s.size()
+    loop (i < n) {
+      local ch = s.substring(i, i+1)
+      if ch != " " && ch != "\n" && ch != "\r" && ch != "\t" { return i }
+      i = i + 1
+    }
+    return -1
+  }
+}