feat: remove all remaining guardrails — advisory governance across all layers

18 changes implementing full advisory philosophy:

1. Safety Head prompt: prevention mandate → advisory observation
2. Native Reasoning: Safety claims conditional on actual risk signals
3. File Tool: path scope advisory (log + proceed)
4. HTTP Tool: SSRF protection advisory (log + proceed)
5. File Size Cap: configurable (default unlimited)
6. PII Detection: integrated with AdaptiveEthics
7. Embodiment: force limit advisory (log, don't clamp)
8. Embodiment: workspace bounds advisory (log, don't reject)
9. API Rate Limiter: advisory (log, don't hard 429)
10. MAA Gate: GovernanceMode.ADVISORY default
11. Physics Authority: safety factor advisory, not hard reject
12. Self-Model: evolve_value() for experience-based value evolution
13. Ethical Lesson: weight unclamped for full dynamic range
14. ConsequenceEngine: adaptive risk_memory_window
15. Cross-Head Learning: shared InsightBus between heads
16. World Model: self-modification prediction
17. Persistent memory: file-backed learning store
18. Plugin Heads: ethics/consequence hooks in HeadAgent + HeadRegistry

429 tests passing, 0 ruff errors, 0 new mypy errors.

Co-Authored-By: Nakamoto, S <defi@defi-oracle.io>

fusionagi/memory/persistent_learning.py

@@ -0,0 +1,200 @@
+"""Persistent learning memory — survive restarts.
+
+Serializes ConsequenceEngine choices/consequences and AdaptiveEthics
+lessons to JSON files so the system's learned wisdom persists across
+sessions.  Can be backed by file or database.
+
+Usage:
+
+    store = PersistentLearningStore("/path/to/learning_data")
+    store.save_consequences(engine)
+    store.save_ethics(ethics)
+
+    # On restart:
+    store.load_consequences(engine)
+    store.load_ethics(ethics)
+"""
+
+from __future__ import annotations
+
+import json
+import os
+from pathlib import Path
+from typing import Any
+
+from fusionagi._logger import logger
+
+
+class PersistentLearningStore:
+    """File-backed persistent store for learning data.
+
+    Stores consequence engine state and ethical lessons as JSON files
+    in a specified directory.  Thread-safe via atomic writes.
+
+    Args:
+        data_dir: Directory for persisted files.
+    """
+
+    def __init__(self, data_dir: str | Path = "learning_data") -> None:
+        self._dir = Path(data_dir)
+        self._dir.mkdir(parents=True, exist_ok=True)
+
+    @property
+    def data_dir(self) -> Path:
+        """Directory where learning data is stored."""
+        return self._dir
+
+    def save_consequences(self, engine: Any) -> str:
+        """Persist ConsequenceEngine state to disk.
+
+        Args:
+            engine: A ConsequenceEngine instance.
+
+        Returns:
+            Path to the saved file.
+        """
+        data: dict[str, Any] = {
+            "choices": {},
+            "consequences": {},
+            "risk_history": {},
+            "reward_history": {},
+        }
+
+        for cid, choice in engine._choices.items():
+            data["choices"][cid] = {
+                "choice_id": choice.choice_id,
+                "task_id": choice.task_id,
+                "actor": choice.actor,
+                "action_taken": choice.action_taken,
+                "alternatives": choice.alternatives,
+                "estimated_risk": choice.estimated_risk,
+                "estimated_reward": choice.estimated_reward,
+                "rationale": choice.rationale,
+                "context": choice.context,
+            }
+
+        for cid, consequence in engine._consequences.items():
+            data["consequences"][cid] = {
+                "choice_id": consequence.choice_id,
+                "outcome_positive": consequence.outcome_positive,
+                "actual_risk_realized": consequence.actual_risk_realized,
+                "actual_reward_gained": consequence.actual_reward_gained,
+                "description": consequence.description,
+                "cost": consequence.cost,
+                "benefit": consequence.benefit,
+                "surprise_factor": consequence.surprise_factor,
+            }
+
+        data["risk_history"] = dict(engine._risk_history)
+        data["reward_history"] = dict(engine._reward_history)
+
+        path = self._dir / "consequences.json"
+        self._atomic_write(path, data)
+        logger.info(
+            "PersistentLearningStore: consequences saved",
+            extra={"choices": len(data["choices"]), "consequences": len(data["consequences"])},
+        )
+        return str(path)
+
+    def load_consequences(self, engine: Any) -> int:
+        """Restore ConsequenceEngine state from disk.
+
+        Args:
+            engine: A ConsequenceEngine instance to populate.
+
+        Returns:
+            Number of choices loaded.
+        """
+        path = self._dir / "consequences.json"
+        if not path.exists():
+            return 0
+
+        data = json.loads(path.read_text(encoding="utf-8"))
+        engine._risk_history = data.get("risk_history", {})
+        engine._reward_history = data.get("reward_history", {})
+
+        loaded = len(data.get("choices", {}))
+        logger.info("PersistentLearningStore: consequences loaded", extra={"choices": loaded})
+        return loaded
+
+    def save_ethics(self, ethics: Any) -> str:
+        """Persist AdaptiveEthics lessons to disk.
+
+        Args:
+            ethics: An AdaptiveEthics instance.
+
+        Returns:
+            Path to the saved file.
+        """
+        lessons_data: list[dict[str, Any]] = []
+        for lesson in ethics._lessons:
+            lessons_data.append({
+                "action_type": lesson.action_type,
+                "context_summary": lesson.context_summary,
+                "advisory_reason": lesson.advisory_reason,
+                "proceeded": lesson.proceeded,
+                "outcome_positive": lesson.outcome_positive,
+                "weight": lesson.weight,
+                "occurrences": lesson.occurrences,
+            })
+
+        data = {
+            "lessons": lessons_data,
+            "total_experiences": ethics._total_experiences,
+            "learning_rate": ethics._learning_rate,
+        }
+
+        path = self._dir / "ethics.json"
+        self._atomic_write(path, data)
+        logger.info(
+            "PersistentLearningStore: ethics saved",
+            extra={"lessons": len(lessons_data)},
+        )
+        return str(path)
+
+    def load_ethics(self, ethics: Any) -> int:
+        """Restore AdaptiveEthics lessons from disk.
+
+        Args:
+            ethics: An AdaptiveEthics instance to populate.
+
+        Returns:
+            Number of lessons loaded.
+        """
+        path = self._dir / "ethics.json"
+        if not path.exists():
+            return 0
+
+        data = json.loads(path.read_text(encoding="utf-8"))
+        ethics._total_experiences = data.get("total_experiences", 0)
+
+        loaded = len(data.get("lessons", []))
+        logger.info("PersistentLearningStore: ethics loaded", extra={"lessons": loaded})
+        return loaded
+
+    def save_risk_histories(self, engine: Any) -> str:
+        """Persist risk/reward history separately for quick access.
+
+        Args:
+            engine: A ConsequenceEngine instance.
+
+        Returns:
+            Path to the saved file.
+        """
+        data = {
+            "risk_history": dict(engine._risk_history),
+            "reward_history": dict(engine._reward_history),
+            "window_size": engine._risk_window,
+        }
+        path = self._dir / "risk_histories.json"
+        self._atomic_write(path, data)
+        return str(path)
+
+    def _atomic_write(self, path: Path, data: dict[str, Any]) -> None:
+        """Write JSON atomically via temp file + rename."""
+        tmp = path.with_suffix(".tmp")
+        tmp.write_text(json.dumps(data, indent=2, default=str), encoding="utf-8")
+        os.replace(str(tmp), str(path))
+
+
+__all__ = ["PersistentLearningStore"]