docs: add instance-dispatch & birth invariants; smokes probe policy; archive CURRENT_TASK and replace with concise plan; impl VM stringify(Void) safety; tighten heavy probes; enable rewrite default ON

tools/smokes/README.md

@@ -34,3 +34,8 @@ Notes
 - Dev defaults are designed to be non-intrusive: tests remain behavior‑compatible.
 - To repro outside smokes, either pass `--dev` or export `NYASH_DEV=1`.
 
+Heavy JSON probes
+- Heavy JSON tests (nested/roundtrip/query_min) run a tiny parser probe first.
+- The probe's stdout last non-empty line is trimmed and compared to `ok`.
+- If not `ok`, the test is SKIP (parser unavailable), not FAIL. This avoids
+  false negatives due to environment noise or optional dependencies.

tools/smokes/v2/profiles/quick/core/json_nested_vm.sh

@@ -27,7 +27,8 @@ EOF
 
 # Probe heavy parser availability; skip gracefully if not ready
 probe=$(run_nyash_vm -c 'using json as JsonParserModule
-static box Main { main() { local p = JsonParserModule.create_parser() ; local r = p.parse("[]") ; if r == null { print("null") } else { print("ok") } return 0 } }' --dev)
+static box Main { main() { local p = JsonParserModule.create_parser()  local r = p.parse("[]")  if r == null { print("null") } else { print("ok") } return 0 } }' --dev)
+probe=$(echo "$probe" | tail -n 1 | tr -d '\r' | xargs)
 if [ "$probe" != "ok" ]; then
   test_skip "json_nested_vm" "heavy parser unavailable in quick" || true
   cd /

tools/smokes/v2/profiles/quick/core/json_query_min_vm.sh

@@ -33,6 +33,7 @@ EOF
 # Probe heavy parser availability
 probe=$(run_nyash_vm -c 'using json as JsonParserModule
 static box Main { main() { local p = JsonParserModule.create_parser()  local r = p.parse("[]")  if r == null { print("null") } else { print("ok") } return 0 } }' --dev)
+probe=$(echo "$probe" | tail -n 1 | tr -d '\r' | xargs)
 if [ "$probe" != "ok" ]; then
   test_skip "json_query_min_vm" "heavy parser unavailable in quick" || true
   cd /

tools/smokes/v2/profiles/quick/core/json_roundtrip_vm.sh

@@ -23,7 +23,8 @@ EOF
 
 # Probe heavy parser availability; skip gracefully if not ready
 probe=$(run_nyash_vm -c 'using json as JsonParserModule
-static box Main { main() { local p = JsonParserModule.create_parser() ; local r = p.parse("null") ; if r == null { print("null") } else { print("ok") } return 0 } }' --dev)
+static box Main { main() { local p = JsonParserModule.create_parser()  local r = p.parse("null")  if r == null { print("null") } else { print("ok") } return 0 } }' --dev)
+probe=$(echo "$probe" | tail -n 1 | tr -d '\r' | xargs)
 if [ "$probe" != "ok" ]; then
   test_skip "json_roundtrip_vm" "heavy parser unavailable in quick" || true
   cd /