Persist review evidence and deliver audit records transactionally

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a07ff8-19d0-7820-b4d0-1353833cb7fc

informed_decision/records.py

@@ -0,0 +1,48 @@
+"""JSON persistence of the existing domain objects; never pickle or a new memo schema."""
+
+from dataclasses import asdict
+import json
+
+from .disposition import Actor, ActorKind, Disposition, Verb
+from .memo import (BindingLevel, BindingSlice, Highlight, Identifier, Memo,
+                   PacketItem, Principal, Scope, StepKind)
+from .presentation import Phase, Presentation
+from .provenance import Claim, Route
+
+
+def dumps(value) -> str:
+    return json.dumps(value, sort_keys=True, separators=(",", ":"), ensure_ascii=False,
+                      allow_nan=False, default=lambda x: sorted(x) if isinstance(x, frozenset) else asdict(x))
+
+
+def memo_from(data: dict) -> Memo:
+    data = dict(data)
+    binding = dict(data["binding"])
+    principal = dict(binding["principal"])
+    principal["identifiers"] = tuple(Identifier(**i) for i in principal.get("identifiers", []))
+    binding["principal"] = Principal(**principal)
+    binding["target"] = Scope(**binding["target"])
+    data["binding"] = BindingSlice(**binding)
+    data["binding_level"] = BindingLevel(data["binding_level"])
+    data["step_kind"] = StepKind(data["step_kind"])
+    data["packet"] = tuple(PacketItem(**p) for p in data["packet"])
+    data["highlights"] = tuple(Highlight(**h) for h in data["highlights"])
+    return Memo(**data)
+
+
+def presentation_from(data: dict) -> Presentation:
+    data = dict(data)
+    data["phase"] = Phase(data["phase"])
+    data["acked_highlight_ids"] = frozenset(data["acked_highlight_ids"])
+    for field in ("tenant", "principal_type"):
+        if data[field] is not None:
+            data[field] = Claim(data[field]["value"], Route(data[field]["route"]))
+    return Presentation(**data)
+
+
+def disposition_from(data: dict) -> Disposition:
+    data = dict(data)
+    data["verb"] = Verb(data["verb"])
+    data["actor"] = Actor(data["actor"]["sub"], ActorKind(data["actor"]["kind"]))
+    data["reasons"] = tuple(data["reasons"])
+    return Disposition(**data)