pyk/kore/rpc, tests/unit/kore/test_client: parse implies status tri-state

haskell-backend v0.1.155 replaces the implies `valid :: Bool` field with a
`status` tri-state (valid | invalid | indeterminate). Parse `status` in
`ImpliesResult.from_dict`, collapsing to `valid = (status == 'valid')`. The
kore-rpc proxy escalates `indeterminate` to a decisive kore verdict except in
booster-only mode, so the conservative collapse is sound for the binary
consumers.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: ehildenb

pyk/src/pyk/kore/rpc.py

@@ -937,8 +937,14 @@ def from_dict(dct: Mapping[str, Any]) -> ImpliesResult:
         substitution = dct.get('condition', {}).get('substitution')
         predicate = dct.get('condition', {}).get('predicate')
         logs = tuple(LogEntry.from_dict(l) for l in dct['logs']) if 'logs' in dct else ()
+        # The backend reports a tri-state `status`: valid | invalid | indeterminate.
+        # `indeterminate` is booster's "could not decide" signal; the kore-rpc proxy
+        # escalates it to a decisive kore verdict on every path except booster-only
+        # mode, so it only reaches us when the caller explicitly opted out of kore.
+        # Collapse it to `valid = False` — the conservative not-implied answer the
+        # binary consumers expect.
         return ImpliesResult(
-            valid=dct['valid'],
+            valid=dct['status'] == 'valid',
             implication=kore_term(dct['implication']),
             substitution=kore_term(substitution) if substitution is not None else None,
             predicate=kore_term(predicate) if predicate is not None else None,

pyk/src/tests/unit/kore/test_client.py

@@ -178,7 +178,7 @@ def test_execute(
         int_bottom,
         int_top,
         {'antecedent': kore(int_bottom), 'consequent': kore(int_top), 'assume-defined': False},
-        {'valid': True, 'implication': kore(int_top)},
+        {'status': 'valid', 'implication': kore(int_top)},
         ImpliesResult(True, int_top, None, None, ()),
     ),
 )