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Unified Continuity Manager
Part of SOVEREIGN PYTHON LLM ENGINE
Facade over all four continuity paradigms.
Picks the right backend per use case automatically.
Decision matrix:
Hot restart needed → EnvStateMachine (Paradigm 1)
Deterministic replay → SeedChain (Paradigm 2)
Fast boolean flags → InodeStateMachine (Paradigm 3)
Cross-process realtime → SharedMemoryState (Paradigm 4)
Full state + crypto chain → CheckpointFile (binary storage)
Usage:
cm = ContinuityManager(base_dir=Path("~/.sovereign"), agent_id="react_1")
cm.transition("IDLE", "THINKING")
cm.advance_op("THINK:plan task")
cm.set_step(1)
state = cm.snapshot()
"""
from __future__ import annotations
from dataclasses import dataclass
from pathlib import Path
from typing import Any
from .env_state import EnvStateMachine, DaemonRestarter, FLAG_NAMES
from .seed_state import SeedChain, SeedLedger, OpLog
from .inode_state import InodeStateMachine, InodeRegistry
from .shared_mem import SharedStateBlock
# ─────────────────────────────────────────────
# State name → flag index mapping
# ─────────────────────────────────────────────
STATE_FLAGS = {name: idx for idx, name in FLAG_NAMES.items()}
# e.g. STATE_FLAGS["THINKING"] = 1
@dataclass
class ContinuitySnapshot:
agent_id: str
step: int
active_states: list[str]
seed_hash: bytes
env_version: int
inode_flags: list[str]
shm_step: int
class ContinuityManager:
"""
Unified continuity manager.
Manages all four backends simultaneously so agents get:
- Fast in-memory flag reads (shared memory)
- Filesystem-durable flags (inode state)
- Env-portable hot restart (env state)
- Deterministic replay (seed chain + op log)
- Binary audit trail (CheckpointFile via storage.py)
"""
def __init__(
self,
base_dir: Path,
agent_id: str,
enable_shm: bool = True,
enable_inode: bool = True,
enable_env: bool = True,
enable_seed: bool = True,
):
self.agent_id = agent_id
self.base_dir = base_dir
base_dir.mkdir(parents=True, exist_ok=True)
# Paradigm 1: Env state
self._env: EnvStateMachine | None = None
if enable_env:
self._env = EnvStateMachine(agent_id)
# Restore from env if daemon was restarted
snapshot = EnvStateMachine.load_from_env()
if snapshot and snapshot.agent_id == agent_id:
self._env.restore(snapshot)
# Paradigm 2: Seed chain
self._seed: SeedChain | None = None
self._seed_ledger: SeedLedger | None = None
self._op_log: OpLog | None = None
if enable_seed:
seed_path = base_dir / agent_id / "seed.bin"
op_path = base_dir / agent_id / "ops.bin"
self._seed_ledger = SeedLedger(seed_path)
self._op_log = OpLog(op_path)
loaded = self._seed_ledger.load()
if loaded:
seed_int, step = loaded
ops = self._op_log.read_up_to(step)
self._seed = SeedChain(seed=seed_int)
for op in ops:
self._seed.advance(op)
else:
self._seed = SeedChain()
self._seed_ledger.save(self._seed)
# Paradigm 3: Inode state
self._inode: InodeStateMachine | None = None
if enable_inode:
inode_dir = base_dir / "inode"
self._inode = InodeStateMachine(inode_dir, agent_id)
# Paradigm 4: Shared memory
self._shm: SharedStateBlock | None = None
if enable_shm:
self._shm = SharedStateBlock(agent_id)
self._step = 0
# ─────────────────────────────────────────
# State transitions
# ─────────────────────────────────────────
def transition(self, from_state: str, to_state: str) -> None:
"""
Transition agent from one state to another across all backends.
"""
from_flag = STATE_FLAGS.get(from_state.upper())
to_flag = STATE_FLAGS.get(to_state.upper())
if self._env and from_flag is not None and to_flag is not None:
self._env.transition(
remove={from_flag},
add={to_flag}
)
if self._inode:
self._inode.transition(
remove={from_state.upper()},
add={to_state.upper()}
)
if self._shm and from_flag is not None and to_flag is not None:
self._shm.clear_flag(from_flag)
self._shm.set_flag(to_flag)
def set_states(self, states: set[str]) -> None:
"""Set exact set of active states, clearing all others."""
flag_indices = {STATE_FLAGS[s.upper()] for s in states if s.upper() in STATE_FLAGS}
if self._env:
self._env.set_flags(flag_indices)
if self._inode:
self._inode.clear_all()
for s in states:
self._inode.set_flag(s.upper())
if self._shm:
self._shm.set_flags_from_set(flag_indices)
# ─────────────────────────────────────────
# Step management
# ─────────────────────────────────────────
def set_step(self, step: int) -> None:
self._step = step
if self._env:
self._env.set_step(step)
if self._inode:
self._inode.set_step(step)
if self._shm:
self._shm.set_step(step)
def increment_step(self) -> int:
self._step += 1
self.set_step(self._step)
return self._step
def get_step(self) -> int:
return self._step
# ─────────────────────────────────────────
# Seed chain operations
# ─────────────────────────────────────────
def advance_op(self, op: str) -> bytes:
"""
Advance the seed chain with an operation.
Returns the new 32-byte state hash.
"""
if not self._seed:
return b'\x00' * 32
state = self._seed.advance(op)
if self._op_log:
self._op_log.append(op)
if self._seed_ledger:
self._seed_ledger.save(self._seed)
return state.state_hash
def fork_timeline(self, from_step: int | None = None) -> SeedChain:
"""Create a forked timeline from the current seed chain."""
if not self._seed:
return SeedChain()
return self._seed.fork(from_step)
def current_state_hash(self) -> bytes:
if not self._seed:
return b'\x00' * 32
return self._seed.current_hash
# ─────────────────────────────────────────
# Hot restart
# ─────────────────────────────────────────
def prepare_restart(self) -> None:
"""Flush all state to env before daemon exec restart."""
if self._env:
self._env.set_step(self._step)
def exec_restart(self) -> None:
"""Hot-restart daemon via os.execv. Does not return."""
self.prepare_restart()
DaemonRestarter().exec_restart()
@property
def was_restarted(self) -> bool:
return DaemonRestarter.is_restarted()
# ─────────────────────────────────────────
# Snapshot
# ─────────────────────────────────────────
def snapshot(self) -> ContinuitySnapshot:
return ContinuitySnapshot(
agent_id=self.agent_id,
step=self._step,
active_states=self._inode.active_flags() if self._inode else [],
seed_hash=self._seed.current_hash if self._seed else b'\x00' * 32,
env_version=self._env.snapshot().version if self._env else 0,
inode_flags=self._inode.active_flags() if self._inode else [],
shm_step=self._shm.get_step() if self._shm else 0,
)
def cleanup(self) -> None:
"""Remove all inode state. Call on agent completion."""
if self._inode:
self._inode.destroy()
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