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b0fbec3 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 | """ForgeEnvironment: the OpenEnv Environment subclass for ForgeEnv.
Episode flow (exactly 2 steps per episode):
reset() -> sample task, ask Teacher for category
step(BreakageAction) -> Drift Generator's proposal is applied; broken
script is run, error trace captured.
step(RepairAction) -> Repair diff is applied; script is re-executed;
visible + held-out rewards computed; episode ends.
"""
from __future__ import annotations
import time
import uuid
from typing import Any, Optional
from openenv.core import Environment
from forgeenv.drift.library_drift_engine import LibraryDriftEngine
from forgeenv.env.actions import BreakageAction, ForgeAction, RepairAction
from forgeenv.env.diff_utils import apply_unified_diff
from forgeenv.env.observations import ForgeObservation
from forgeenv.primitives.breakage_primitives import (
PRIMITIVE_REGISTRY,
parse_breakage_spec,
)
from forgeenv.roles.teacher import Teacher
from forgeenv.sandbox.simulation_mode import SimulationExecutor
from forgeenv.tasks.models import ExecutionResult, Task
from forgeenv.tasks.task_sampler import TaskSampler
from forgeenv.verifier.held_out_evaluator import compute_held_out_scores
from forgeenv.verifier.visible_verifier import compute_visible_reward
DEFAULT_CATEGORIES = sorted(PRIMITIVE_REGISTRY.keys())
class ForgeEnvironment(Environment[ForgeAction, ForgeObservation, dict]):
"""OpenEnv-compliant environment for HuggingFace ecosystem repair."""
SUPPORTS_CONCURRENT_SESSIONS = False # Teacher state is global per env
def __init__(
self,
task_sampler: Optional[TaskSampler] = None,
teacher: Optional[Teacher] = None,
executor: Optional[SimulationExecutor] = None,
drift_engine: Optional[LibraryDriftEngine] = None,
seed: Optional[int] = None,
) -> None:
super().__init__()
self.task_sampler = task_sampler or TaskSampler()
self.teacher = teacher or Teacher(
categories=list(DEFAULT_CATEGORIES) or ["api_drift"]
)
self.executor = executor or SimulationExecutor(seed=seed)
self.drift_engine = drift_engine or LibraryDriftEngine()
self._episode_id: Optional[str] = None
self._episode_count: int = 0
self._current_task: Optional[Task] = None
self._original_script: str = ""
self._broken_script: str = ""
self._error_trace: str = ""
self._breakage_spec: Optional[dict[str, Any]] = None
self._target_category: str = ""
self._current_phase: str = "idle"
self._last_obs: Optional[ForgeObservation] = None
# ------------------------------------------------------------------ API
def reset(
self,
seed: Optional[int] = None,
episode_id: Optional[str] = None,
difficulty: Optional[str] = "easy",
**kwargs: Any,
) -> ForgeObservation:
self._episode_id = episode_id or str(uuid.uuid4())
self._episode_count += 1
self._target_category = self.teacher.select_next_category()
task = self.task_sampler.sample(difficulty=difficulty)
if task is None:
raise RuntimeError("Task sampler returned no tasks (empty seed corpus?)")
self._current_task = task
self._original_script = task.script_content
self._broken_script = ""
self._error_trace = ""
self._breakage_spec = None
self._current_phase = "drift_gen"
# Library drift trigger every 50 episodes (configurable from outside).
drifted = self.drift_engine.maybe_drift(self._episode_count, drift_every=50)
obs = ForgeObservation(
current_phase="drift_gen",
task_id=task.task_id,
task_description=task.description,
target_category=self._target_category,
script_content=self._original_script,
error_trace=None,
library_versions=self.drift_engine.current_versions(),
episode_step=0,
done=False,
reward=0.0,
info={
"episode_id": self._episode_id,
"episode_count": self._episode_count,
"drift_triggered": drifted,
"available_primitives": sorted(PRIMITIVE_REGISTRY),
},
)
self._last_obs = obs
return obs
def step(
self,
action: ForgeAction,
timeout_s: Optional[float] = None,
**kwargs: Any,
) -> ForgeObservation:
if self._current_phase == "drift_gen":
if action.breakage is None:
return self._error_obs("Expected BreakageAction in drift_gen phase")
return self._handle_breakage(action.breakage)
if self._current_phase == "repair":
if action.repair is None:
return self._error_obs("Expected RepairAction in repair phase")
return self._handle_repair(action.repair)
return self._error_obs(
f"step() called in invalid phase {self._current_phase!r} — call reset() first"
)
@property
def state(self) -> dict:
return {
"phase": self._current_phase,
"episode_id": self._episode_id,
"episode_count": self._episode_count,
"task_id": self._current_task.task_id if self._current_task else None,
"target_category": self._target_category,
"library_versions": self.drift_engine.current_versions(),
"teacher": self.teacher.get_state(),
"drift_history": list(self.drift_engine.drift_history),
"breakage_spec": dict(self._breakage_spec) if self._breakage_spec else None,
}
# ---------------------------------------------------------------- helpers
def _handle_breakage(self, breakage: BreakageAction) -> ForgeObservation:
spec = {"primitive_type": breakage.primitive_type, "params": dict(breakage.params)}
try:
primitive = parse_breakage_spec(spec)
except ValueError as exc:
return self._error_obs(f"Invalid breakage spec: {exc}")
try:
self._broken_script = primitive.apply(self._original_script)
except Exception as exc: # primitive bug — surface but don't crash server
return self._error_obs(f"Primitive apply failed: {exc}")
self._breakage_spec = spec
result = self.executor.execute(self._broken_script, self._current_task)
if result.exit_code != 0:
self._error_trace = result.stderr or "non-zero exit code, no stderr"
else:
# The breakage didn't actually break it; still proceed to repair phase
# (no-op repair is then a valid choice).
self._error_trace = "Script ran without observable error"
self._current_phase = "repair"
obs = ForgeObservation(
current_phase="repair",
task_id=self._current_task.task_id,
task_description=self._current_task.description,
target_category=primitive.category,
script_content=self._broken_script,
error_trace=self._error_trace,
library_versions=self.drift_engine.current_versions(),
episode_step=1,
done=False,
reward=0.0,
info={
"episode_id": self._episode_id,
"breakage_primitive": primitive.name,
"breakage_description": primitive.description,
},
)
self._last_obs = obs
return obs
def _handle_repair(self, repair: RepairAction) -> ForgeObservation:
repaired = apply_unified_diff(self._broken_script, repair.unified_diff or "")
t0 = time.time()
result = self.executor.execute(repaired, self._current_task)
result.script_content = repaired # ensure verifier sees what we ran
wall_ms = int((time.time() - t0) * 1000)
visible_reward, visible_breakdown = compute_visible_reward(
result, self._current_task
)
held_out = compute_held_out_scores(
result, self._current_task, repair_diff=repair.unified_diff or ""
)
success = result.exit_code == 0
category = (
self._breakage_spec.get("primitive_type", "unknown")
if self._breakage_spec
else "unknown"
)
# Update Teacher's curriculum state
self.teacher.update(category, success)
self._current_phase = "done"
obs = ForgeObservation(
current_phase="done",
task_id=self._current_task.task_id,
task_description=self._current_task.description,
target_category=category,
script_content=repaired,
error_trace=result.stderr or None,
library_versions=self.drift_engine.current_versions(),
episode_step=2,
done=True,
reward=visible_reward,
reward_breakdown=visible_breakdown,
held_out_breakdown=held_out,
info={
"episode_id": self._episode_id,
"exit_code": result.exit_code,
"wall_time_ms": wall_ms,
"checkpoint_exists": result.checkpoint_exists,
"stdout_tail": "\n".join(result.stdout.splitlines()[-5:]),
"breakage_spec": self._breakage_spec,
"teacher_state": self.teacher.get_state(),
},
)
self._last_obs = obs
return obs
def _error_obs(self, message: str) -> ForgeObservation:
"""Return a `done=True` error observation rather than raising."""
return ForgeObservation(
current_phase="done",
task_id=self._current_task.task_id if self._current_task else "",
task_description=self._current_task.description if self._current_task else "",
target_category=self._target_category,
script_content=self._broken_script or self._original_script,
error_trace=message,
library_versions=self.drift_engine.current_versions(),
episode_step=2,
done=True,
reward=0.0,
info={"error": message, "episode_id": self._episode_id},
)
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