pyvm: split op handlers into ops_core/ops_box/ops_ctrl; add ops_flow + intrinsic; delegate vm.py without behavior change

net-plugin: modularize constants (consts.rs) and sockets (sockets.rs); remove legacy commented socket code; fix unused imports
mir: move instruction unit tests to tests/mir_instruction_unit.rs (file lean-up); no semantic changes
runner/pyvm: ensure using pre-strip; misc docs updates

Build: cargo build ok; legacy cfg warnings remain as before

tools/test/smoke/parser/not_operator_smoke.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root=$(cd "$(dirname "$0")"/../../../.. && pwd)
+bin="$root/target/release/nyash"
+src="$root/apps/tests/sugar/not_basic.nyash"
+
+if [ ! -x "$bin" ]; then
+  echo "nyash binary not found at $bin; build first (cargo build --release)" >&2
+  exit 1
+fi
+
+export NYASH_VM_USE_PY=1
+export NYASH_ENTRY_ALLOW_TOPLEVEL_MAIN=1
+out=$("$bin" --backend vm "$src" 2>&1 | sed '/^\[entry\] Warning/d')
+# Expect lines: 1 then 0
+line1=$(printf '%s\n' "$out" | sed -n '1p')
+line2=$(printf '%s\n' "$out" | sed -n '2p')
+test "$line1" = "1" || { echo "[FAIL] not on 0 expected 1, got '$line1'" >&2; echo "$out" >&2; exit 2; }
+test "$line2" = "0" || { echo "[FAIL] not on 1 expected 0, got '$line2'" >&2; echo "$out" >&2; exit 2; }
+echo "[OK] not-operator smoke passed"

tools/test/smoke/parser/semicolon_accept_smoke.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root=$(cd "$(dirname "$0")"/../../../.. && pwd)
+bin="$root/target/release/nyash"
+prog="$root/apps/tests/parser/semicolon_basic.nyash"
+
+out=$(NYASH_PARSER_ALLOW_SEMICOLON=1 NYASH_VM_USE_PY=1 "$bin" --backend vm "$prog")
+expected=$'A\nB'
+test "$out" = "$expected" || { echo "[FAIL] semicolon_accept expected '$expected', got '$out'" >&2; exit 2; }
+echo "[OK] semicolon_accept"
+

tools/test/smoke/parser/semicolon_else_edge_smoke.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+root=$(cd "$(dirname "$0")"/../../../.. && pwd)
+bin="$root/target/release/nyash"
+src="$root/apps/tests/parser/semicolon_else_edge.nyash"
+
+if [ ! -x "$bin" ]; then
+  echo "nyash binary not found at $bin; build first (cargo build --release)" >&2
+  exit 1
+fi
+
+export NYASH_PARSER_ALLOW_SEMICOLON=1
+
+set +e
+err=$("$bin" --backend vm "$src" 2>&1 >/dev/null)
+code=$?
+set -e
+
+if [ "$code" -eq 0 ]; then
+  echo "[FAIL] parser accepted forbidden '} ; else' boundary"
+  exit 2
+fi
+echo "$err" | rg -qi 'parse error' || { echo "[FAIL] parser did not report parse error" >&2; echo "$err" >&2; exit 2; }
+echo "[OK] parser semicolon else-edge smoke passed"
+