commit cb03f4a6e19f89e7699e9ba89ac2c4e3ff279974
Author: Langley <langley0@naver.com>
Date:   Mon Jan 12 18:25:04 2026 +0900

    first commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..85118b7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.env
+*.pyc
diff --git a/dotenv_loader.py b/dotenv_loader.py
new file mode 100644
index 0000000..50a9c3d
--- /dev/null
+++ b/dotenv_loader.py
@@ -0,0 +1,62 @@
+from __future__ import annotations
+
+import os
+from pathlib import Path
+from typing import Optional
+
+
+def load_dotenv_into_environ(dotenv_path: os.PathLike[str] | str, *, override: bool = False) -> bool:
+    """
+    Load KEY=VALUE lines from a .env file into os.environ.
+
+    - Supports lines like: KEY=VALUE, export KEY=VALUE
+    - Ignores blank lines and # comments
+    - Handles single/double-quoted values
+    - Does not expand ${VARS} or handle multiline values
+
+    Returns True if the file existed and was read.
+    """
+    path = Path(dotenv_path)
+    if not path.is_file():
+        return False
+
+    content = path.read_text(encoding="utf-8")
+    # Remove UTF-8 BOM if present
+    if content.startswith("\ufeff"):
+        content = content.lstrip("\ufeff")
+
+    for raw_line in content.splitlines():
+        line = raw_line.strip()
+        if not line or line.startswith("#"):
+            continue
+        if line.startswith("export "):
+            line = line[len("export ") :].lstrip()
+
+        if "=" not in line:
+            continue
+
+        key, value = line.split("=", 1)
+        key = key.strip()
+        value = value.strip()
+
+        if not key:
+            continue
+
+        if len(value) >= 2 and value[0] == value[-1] and value[0] in ("'", '"'):
+            value = value[1:-1]
+
+        if not override and key in os.environ:
+            continue
+
+        os.environ[key] = value
+
+    return True
+
+
+def load_llm_fsm_dotenv(*, override: bool = False, filename: str = ".env") -> bool:
+    """
+    Convenience loader for `.env` next to `scripts/llm_fsm` runner scripts.
+    """
+    dotenv_path = Path(__file__).resolve().parent / filename
+    return load_dotenv_into_environ(dotenv_path, override=override)
+
diff --git a/llm_fsm_multi_env.py b/llm_fsm_multi_env.py
new file mode 100644
index 0000000..206130b
--- /dev/null
+++ b/llm_fsm_multi_env.py
@@ -0,0 +1,677 @@
+# llm_fsm_multi_env.py
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Any, Dict, List, Literal, Optional, Tuple
+
+import torch
+
+
+# --------------------------
+# Types
+# --------------------------
+Vec3T = torch.Tensor       # (N,3)
+QuatT = torch.Tensor       # (N,4) wxyz
+MaskT = torch.Tensor       # (N,) bool
+
+SkillName = Literal[
+    "pick", "release", "place", "drop",
+    "align", "insert", "remove",
+    "rotate", "rotate_until_limit",
+    "fasten", "loosen",
+    "open", "close",
+    "clamp", "unclamp",
+    "press", "toggle",
+    "insert_into", "remove_from",
+    "regrasp", "adjust_pose",
+]
+
+PredicateType = Literal[
+    "is_grasped",
+    "object_on_surface",
+    "object_in_container",
+    "object_in_fixture",
+    "pose_in_tolerance",
+    "depth_in_range",
+    "fixture_state",
+    "button_pressed",
+    "switch_state",
+    "thread_engaged",
+]
+
+
+# --------------------------
+# Spec dataclasses
+# --------------------------
+@dataclass
+class SkillSpec:
+    name: SkillName
+    args: Dict[str, Any]
+
+
+@dataclass
+class PredicateSpec:
+    type: PredicateType
+    args: Dict[str, Any]  # free-form params
+
+
+@dataclass
+class GoalSpec:
+    summary: str
+    success_conditions: List[PredicateSpec]
+
+
+@dataclass
+class TaskSpec:
+    task_id: str
+    activity: str
+    task_name: str
+    skills: List[SkillSpec]
+    goal: GoalSpec
+
+    @staticmethod
+    def from_dict(task: Dict[str, Any]) -> "TaskSpec":
+        skills_in = task.get("skills", [])
+        skills: List[SkillSpec] = []
+        for s in skills_in:
+            if not isinstance(s, dict):
+                raise TypeError(f"Skill entry must be a dict, got: {type(s)}")
+            skills.append(SkillSpec(name=s["name"], args=dict(s.get("args", {}))))
+
+        goal_in = task.get("goal", {})
+        preds_in = goal_in.get("success_conditions", [])
+        preds: List[PredicateSpec] = []
+        for p in preds_in:
+            if not isinstance(p, dict):
+                raise TypeError(f"Predicate entry must be a dict, got: {type(p)}")
+            p_type = p["type"]
+            p_args = dict(p)
+            p_args.pop("type", None)
+            preds.append(PredicateSpec(type=p_type, args=p_args))
+
+        goal = GoalSpec(summary=goal_in.get("summary", ""), success_conditions=preds)
+        return TaskSpec(
+            task_id=task.get("task_id", ""),
+            activity=task.get("activity", ""),
+            task_name=task.get("task_name", ""),
+            skills=skills,
+            goal=goal,
+        )
+
+
+# --------------------------
+# Minimal Batched Env API (YOU implement these)
+# --------------------------
+class BatchedEnvAPI:
+    """
+    You adapt this to your IsaacLab env.
+    Required to be batched over num_envs (N).
+
+    All returned tensors are on the same device as env (typically CUDA).
+    """
+
+    device: torch.device
+    num_envs: int
+
+    # --- asset queries ---
+    def get_pose_w(self, name: str) -> tuple[Vec3T, QuatT]:
+        """Return pose of an entity by name: pos (N,3), quat (N,4) wxyz."""
+        raise NotImplementedError
+
+    def contains(self, fixture_or_container: str, obj: str) -> MaskT:
+        """Return (N,) bool if obj is in fixture/container region."""
+        raise NotImplementedError
+
+    def fixture_state(self, fixture: str, state_name: str) -> Any:
+        """
+        Return a batched state. Common choices:
+          - bool tensor (N,) for open/closed
+          - float tensor (N,) for joint position / open ratio
+          - int tensor (N,) for discrete states
+        """
+        raise NotImplementedError
+
+    def button_pressed(self, fixture: str, button: str) -> MaskT:
+        raise NotImplementedError
+
+    def switch_state(self, fixture: str, switch: str) -> Any:
+        raise NotImplementedError
+
+    # --- stepping / resets ---
+    def step_physics(self, action: Optional[torch.Tensor] = None) -> None:
+        """Advance sim one step. action can be dummy if you drive controllers elsewhere."""
+        raise NotImplementedError
+
+    def reset(self, env_ids: Optional[torch.Tensor] = None) -> None:
+        """Reset all envs if env_ids is None else only subset env_ids (1D int tensor)."""
+        raise NotImplementedError
+
+
+# --------------------------
+# Robot Facade (Batched) - YOU wire to IK/hand control
+# --------------------------
+@dataclass
+class MoveResultBatched:
+    reached: MaskT  # (N,) bool
+
+
+class RobotFacadeBatched:
+    """
+    Replace internals with your actual IsaacLab controllers.
+    This interface is batched: everything operates on all envs, masked by active_mask.
+    """
+
+    def __init__(self, env: BatchedEnvAPI):
+        self.env = env
+        self.device = env.device
+        self.N = env.num_envs
+
+        # TODO: create & store your DifferentialIKController / hand joint controllers here
+        # self.ik = DifferentialIKController(...)
+        # self.hand = ...
+
+    def get_ee_pose_w(self) -> tuple[Vec3T, QuatT]:
+        """Return EE pose (N,3),(N,4)."""
+        raise NotImplementedError
+
+    def is_grasped(self, object_name: str) -> MaskT:
+        """Return (N,) grasp status. Implement using contact sensors + relative pose."""
+        raise NotImplementedError
+
+    def move_ee_pose(
+        self,
+        pos_w: Vec3T,
+        quat_w: QuatT,
+        active_mask: Optional[MaskT] = None,
+        pos_tol: float = 0.01,
+        rot_tol: float = 0.2,
+    ) -> MoveResultBatched:
+        """
+        Move EE toward target pose for envs in active_mask.
+        Return reached mask for ALL envs; unreachable envs should be False.
+        """
+        if active_mask is None:
+            active_mask = torch.ones(self.N, device=self.device, dtype=torch.bool)
+
+        # TODO: implement your IK step here:
+        # - compute joint targets for active envs
+        # - write into controllers / action buffer
+        # - evaluate reached: compare current ee pose vs target
+        # Placeholder: pretend reached immediately for active envs
+        reached = torch.zeros(self.N, device=self.device, dtype=torch.bool)
+        reached[active_mask] = True
+        return MoveResultBatched(reached=reached)
+
+    def open_hand(self, active_mask: Optional[MaskT] = None) -> None:
+        if active_mask is None:
+            active_mask = torch.ones(self.N, device=self.device, dtype=torch.bool)
+        # TODO: set finger joint targets open for active envs
+        return
+
+    def close_hand(self, active_mask: Optional[MaskT] = None) -> None:
+        if active_mask is None:
+            active_mask = torch.ones(self.N, device=self.device, dtype=torch.bool)
+        # TODO: set finger joint targets close for active envs
+        return
+
+    def push_along_axis(
+        self,
+        start_pos_w: Vec3T,
+        quat_w: QuatT,
+        axis_w: Vec3T,
+        dist: float,
+        active_mask: Optional[MaskT] = None,
+        pos_tol: float = 0.01,
+        rot_tol: float = 0.2,
+    ) -> MoveResultBatched:
+        """Target = start + axis*dist."""
+        target = start_pos_w + axis_w * dist
+        return self.move_ee_pose(target, quat_w, active_mask=active_mask, pos_tol=pos_tol, rot_tol=rot_tol)
+
+
+# --------------------------
+# Success Evaluator (Batched)
+# --------------------------
+class SuccessEvaluatorBatched:
+    def __init__(self, env: BatchedEnvAPI, robot: RobotFacadeBatched, predicates: List[PredicateSpec]):
+        self.env = env
+        self.robot = robot
+        self.predicates = predicates
+        self.device = env.device
+        self.N = env.num_envs
+
+    def check(self) -> MaskT:
+        """Return success mask (N,)."""
+        if len(self.predicates) == 0:
+            return torch.zeros(self.N, device=self.device, dtype=torch.bool)
+
+        ok = torch.ones(self.N, device=self.device, dtype=torch.bool)
+        for p in self.predicates:
+            ok = ok & self._eval(p)
+        return ok
+
+    def _eval(self, p: PredicateSpec) -> MaskT:
+        t = p.type
+        a = p.args
+
+        if t == "is_grasped":
+            return self.robot.is_grasped(a["object"])
+
+        if t == "object_in_fixture":
+            return self.env.contains(a["fixture"], a["object"])
+
+        if t == "object_in_container":
+            return self.env.contains(a["container"], a["object"])
+
+        if t == "fixture_state":
+            cur = self.env.fixture_state(a["fixture"], a["state_name"])
+            # common: cur is bool tensor
+            if torch.is_tensor(cur):
+                return cur == torch.tensor(a["value"], device=cur.device, dtype=cur.dtype)
+            # if not tensor, you can adapt here
+            raise TypeError("fixture_state must return a tensor for batched evaluator")
+
+        if t == "button_pressed":
+            return self.env.button_pressed(a["fixture"], a["button"])
+
+        if t == "switch_state":
+            cur = self.env.switch_state(a["fixture"], a["switch"])
+            if torch.is_tensor(cur):
+                # value might be str -> you need mapping; keep it tensor-based in env
+                return cur == torch.tensor(a["value"], device=cur.device, dtype=cur.dtype)
+            raise TypeError("switch_state must return a tensor for batched evaluator")
+
+        if t == "pose_in_tolerance":
+            pos, _ = self.env.get_pose_w(a["object"])
+            tgt_pos, _ = self.env.get_pose_w(a["target_frame"])
+            pos_tol = float(a.get("pos_tol", 0.02))
+            d = torch.linalg.norm(pos - tgt_pos, dim=-1)
+            return d <= pos_tol
+
+        if t == "depth_in_range":
+            obj_pos, _ = self.env.get_pose_w(a["object"])
+            hole_pos, _ = self.env.get_pose_w(a["fixture"])
+            axis = a.get("axis_w", [0.0, 0.0, 1.0])
+            axis_w = torch.tensor(axis, device=self.device, dtype=obj_pos.dtype).view(1, 3).repeat(self.N, 1)
+            depth = torch.sum((obj_pos - hole_pos) * axis_w, dim=-1)
+            return (depth >= float(a["min_depth"])) & (depth <= float(a["max_depth"]))
+
+        # optional ones not implemented here:
+        if t in ("object_on_surface", "thread_engaged"):
+            return torch.zeros(self.N, device=self.device, dtype=torch.bool)
+
+        raise ValueError(f"Unknown predicate type: {t}")
+
+
+# --------------------------
+# Batched Skills
+#   - Each skill keeps per-env internal phase/timers as tensors.
+#   - step(active_mask) returns done_mask for ALL envs (True only for envs that finished this skill).
+# --------------------------
+@dataclass
+class SkillContext:
+    env: BatchedEnvAPI
+    robot: RobotFacadeBatched
+
+
+class BaseSkillBatched:
+    def __init__(self, ctx: SkillContext):
+        self.ctx = ctx
+        self.device = ctx.env.device
+        self.N = ctx.env.num_envs
+        self.phase = torch.zeros(self.N, device=self.device, dtype=torch.long)  # per-env phase
+
+    def reset(self, enter_mask: MaskT) -> None:
+        """Called when some envs enter this skill (idx changes to this skill)."""
+        self.phase[enter_mask] = 0
+
+    def step(self, active_mask: MaskT) -> MaskT:
+        raise NotImplementedError
+
+
+class PickSkillBatched(BaseSkillBatched):
+    def __init__(self, ctx: SkillContext, object_name: str, pregrasp_z: float = 0.08):
+        super().__init__(ctx)
+        self.object_name = object_name
+        self.pregrasp_z = pregrasp_z
+
+    def step(self, active_mask: MaskT) -> MaskT:
+        done = torch.zeros(self.N, device=self.device, dtype=torch.bool)
+
+        # phase 0: move to pregrasp
+        m0 = active_mask & (self.phase == 0)
+        if m0.any():
+            obj_pos, obj_quat = self.ctx.env.get_pose_w(self.object_name)
+            target_pos = obj_pos.clone()
+            target_pos[m0, 2] = obj_pos[m0, 2] + self.pregrasp_z
+            r = self.ctx.robot.move_ee_pose(target_pos, obj_quat, active_mask=m0)
+            reached = r.reached & m0
+            self.phase[reached] = 1
+
+        # phase 1: close hand (one-shot)
+        m1 = active_mask & (self.phase == 1)
+        if m1.any():
+            self.ctx.robot.close_hand(active_mask=m1)
+            self.phase[m1] = 2
+
+        # phase 2: verify
+        m2 = active_mask & (self.phase == 2)
+        if m2.any():
+            grasped = self.ctx.robot.is_grasped(self.object_name) & m2
+            done[grasped] = True
+            # keep phase=2 for those not yet grasped (could add timeout logic)
+
+        return done
+
+
+class ReleaseSkillBatched(BaseSkillBatched):
+    def __init__(self, ctx: SkillContext, object_name: str):
+        super().__init__(ctx)
+        self.object_name = object_name
+
+    def step(self, active_mask: MaskT) -> MaskT:
+        done = torch.zeros(self.N, device=self.device, dtype=torch.bool)
+        m0 = active_mask & (self.phase == 0)
+        if m0.any():
+            self.ctx.robot.open_hand(active_mask=m0)
+            self.phase[m0] = 1
+
+        # immediate done (optionally verify not grasped)
+        m1 = active_mask & (self.phase == 1)
+        done[m1] = True
+        return done
+
+
+class PlaceSkillBatched(BaseSkillBatched):
+    def __init__(self, ctx: SkillContext, object_name: str, target_name: str, above_z: float = 0.10):
+        super().__init__(ctx)
+        self.object_name = object_name
+        self.target_name = target_name
+        self.above_z = above_z
+
+    def step(self, active_mask: MaskT) -> MaskT:
+        done = torch.zeros(self.N, device=self.device, dtype=torch.bool)
+
+        # phase 0: move above target
+        m0 = active_mask & (self.phase == 0)
+        if m0.any():
+            tgt_pos, tgt_quat = self.ctx.env.get_pose_w(self.target_name)
+            above = tgt_pos.clone()
+            above[m0, 2] = tgt_pos[m0, 2] + self.above_z
+            r = self.ctx.robot.move_ee_pose(above, tgt_quat, active_mask=m0)
+            reached = r.reached & m0
+            self.phase[reached] = 1
+
+        # phase 1: move down to target
+        m1 = active_mask & (self.phase == 1)
+        if m1.any():
+            tgt_pos, tgt_quat = self.ctx.env.get_pose_w(self.target_name)
+            r = self.ctx.robot.move_ee_pose(tgt_pos, tgt_quat, active_mask=m1)
+            reached = r.reached & m1
+            self.phase[reached] = 2
+
+        # phase 2: open hand then done
+        m2 = active_mask & (self.phase == 2)
+        if m2.any():
+            self.ctx.robot.open_hand(active_mask=m2)
+            done[m2] = True
+
+        return done
+
+
+class AlignSkillBatched(BaseSkillBatched):
+    """
+    Placeholder alignment: go to pre-insert pose above fixture frame.
+    Replace internally with your pinch-axis + face selection + micro-adjust.
+    """
+    def __init__(self, ctx: SkillContext, object_name: str, target_fixture: str, standoff_z: float = 0.06):
+        super().__init__(ctx)
+        self.object_name = object_name
+        self.target_fixture = target_fixture
+        self.standoff_z = standoff_z
+
+    def step(self, active_mask: MaskT) -> MaskT:
+        done = torch.zeros(self.N, device=self.device, dtype=torch.bool)
+
+        m0 = active_mask & (self.phase == 0)
+        if m0.any():
+            hole_pos, hole_quat = self.ctx.env.get_pose_w(self.target_fixture)
+            pre = hole_pos.clone()
+            pre[m0, 2] = hole_pos[m0, 2] + self.standoff_z
+            r = self.ctx.robot.move_ee_pose(pre, hole_quat, active_mask=m0)
+            reached = r.reached & m0
+            done[reached] = True
+
+        return done
+
+
+class InsertSkillBatched(BaseSkillBatched):
+    """
+    Placeholder insertion: move to pre, then push along -Z.
+    Replace axis with fixture insertion axis, and add contact-based micro-adjust.
+    """
+    def __init__(self, ctx: SkillContext, object_name: str, target_fixture: str, pre_z: float = 0.03, depth: float = 0.02):
+        super().__init__(ctx)
+        self.object_name = object_name
+        self.target_fixture = target_fixture
+        self.pre_z = pre_z
+        self.depth = depth
+
+    def step(self, active_mask: MaskT) -> MaskT:
+        done = torch.zeros(self.N, device=self.device, dtype=torch.bool)
+
+        # phase 0: pre-insert
+        m0 = active_mask & (self.phase == 0)
+        if m0.any():
+            hole_pos, hole_quat = self.ctx.env.get_pose_w(self.target_fixture)
+            pre = hole_pos.clone()
+            pre[m0, 2] = hole_pos[m0, 2] + self.pre_z
+            r = self.ctx.robot.move_ee_pose(pre, hole_quat, active_mask=m0)
+            reached = r.reached & m0
+            self.phase[reached] = 1
+
+        # phase 1: push along axis
+        m1 = active_mask & (self.phase == 1)
+        if m1.any():
+            hole_pos, hole_quat = self.ctx.env.get_pose_w(self.target_fixture)
+            start = hole_pos.clone()
+            start[m1, 2] = hole_pos[m1, 2] + self.pre_z
+            axis_w = torch.zeros((self.N, 3), device=self.device, dtype=hole_pos.dtype)
+            axis_w[:, 2] = -1.0
+            r = self.ctx.robot.push_along_axis(start, hole_quat, axis_w, self.depth, active_mask=m1)
+            reached = r.reached & m1
+            done[reached] = True
+
+        return done
+
+
+# --------------------------
+# Skill Factory (Batched)
+# --------------------------
+def build_skill_batched(ctx: SkillContext, spec: SkillSpec) -> BaseSkillBatched:
+    n = spec.name
+    a = spec.args
+
+    if n == "pick":
+        return PickSkillBatched(ctx, a["object"])
+    if n == "release":
+        return ReleaseSkillBatched(ctx, a["object"])
+    if n == "place":
+        return PlaceSkillBatched(ctx, a["object"], a["target"])
+    if n == "align":
+        return AlignSkillBatched(ctx, a["object"], a["target_fixture"])
+    if n == "insert":
+        depth = float(a.get("depth", 0.02))
+        return InsertSkillBatched(ctx, a["object"], a["target_fixture"], depth=depth)
+
+    raise NotImplementedError(f"Skill not implemented (batched): {n}")
+
+
+# --------------------------
+# Batched Skill FSM
+# --------------------------
+class SkillFSMBatched:
+    """
+    One task_spec replicated across N envs.
+    Maintain env-wise idx; execute appropriate skill for env subsets.
+    """
+
+    def __init__(self, ctx: SkillContext, skill_specs: List[SkillSpec]):
+        self.ctx = ctx
+        self.device = ctx.env.device
+        self.N = ctx.env.num_envs
+
+        self.skill_specs = skill_specs
+        self.K = len(skill_specs)
+
+        # Prebuild all skill objects (K of them), each with per-env phase tensor
+        self.skills: List[BaseSkillBatched] = [build_skill_batched(ctx, s) for s in skill_specs]
+
+        # env-wise pointer
+        self.idx = torch.zeros(self.N, device=self.device, dtype=torch.long)  # current skill index per env
+        self.done = torch.zeros(self.N, device=self.device, dtype=torch.bool)  # whether sequence finished
+
+    def reset(self, env_ids: Optional[torch.Tensor] = None) -> None:
+        """Reset FSM for all envs or subset."""
+        if env_ids is None:
+            mask = torch.ones(self.N, device=self.device, dtype=torch.bool)
+        else:
+            mask = torch.zeros(self.N, device=self.device, dtype=torch.bool)
+            mask[env_ids] = True
+
+        self.idx[mask] = 0
+        self.done[mask] = False
+
+        # envs enter skill 0
+        self.skills[0].reset(mask)
+
+    def step(self, active_mask: MaskT) -> MaskT:
+        """
+        Advance one tick for envs in active_mask.
+        Returns seq_done_mask (N,) indicating which envs have finished all skills.
+        """
+        # Don't run already finished envs
+        run_mask = active_mask & (~self.done)
+
+        if not run_mask.any():
+            return self.done.clone()
+
+        # For each skill k, run for envs where idx==k
+        for k in range(self.K):
+            mk = run_mask & (self.idx == k)
+            if not mk.any():
+                continue
+
+            skill_done = self.skills[k].step(mk)  # returns (N,)
+            finished_here = mk & skill_done
+
+            if finished_here.any():
+                # advance idx
+                next_idx = k + 1
+                if next_idx >= self.K:
+                    # sequence finished
+                    self.done[finished_here] = True
+                else:
+                    self.idx[finished_here] = next_idx
+                    # envs "enter" next skill => reset its internal phase for these envs
+                    self.skills[next_idx].reset(finished_here)
+
+        return self.done.clone()
+
+
+# --------------------------
+# Compiled Task Bundle (Batched)
+# --------------------------
+@dataclass
+class CompiledTaskBatched:
+    env: BatchedEnvAPI
+    robot: RobotFacadeBatched
+    fsm: SkillFSMBatched
+    evaluator: SuccessEvaluatorBatched
+
+
+# --------------------------
+# Compiler (Batched)
+# --------------------------
+class LLMFSMCompilerBatched:
+    def compile(self, env: BatchedEnvAPI, task_spec: TaskSpec) -> CompiledTaskBatched:
+        robot = RobotFacadeBatched(env)
+        ctx = SkillContext(env=env, robot=robot)
+        fsm = SkillFSMBatched(ctx, task_spec.skills)
+        evaluator = SuccessEvaluatorBatched(env, robot, task_spec.goal.success_conditions)
+        # full reset
+        fsm.reset()
+        return CompiledTaskBatched(env=env, robot=robot, fsm=fsm, evaluator=evaluator)
+
+
+# --------------------------
+# Runner loop (multi-env)
+# --------------------------
+def run_compiled_task_multi_env(
+    compiled: CompiledTaskBatched,
+    max_steps: int = 2000,
+    auto_reset_success: bool = False,
+) -> Dict[str, Any]:
+    env = compiled.env
+    N = env.num_envs
+    device = env.device
+
+    # initial reset
+    env.reset()
+    compiled.fsm.reset()
+
+    success = torch.zeros(N, device=device, dtype=torch.bool)
+
+    for t in range(max_steps):
+        # 1) check success before step (optional)
+        success_now = compiled.evaluator.check()
+        success = success | success_now
+
+        # 2) active envs = not success and not fsm-done (you can choose policy)
+        active = (~success) & (~compiled.fsm.done)
+
+        # 3) advance FSM for active envs
+        compiled.fsm.step(active)
+
+        # 4) physics step
+        env.step_physics(action=None)
+
+        # 5) optional: auto-reset envs that succeeded (common for dataset generation)
+        if auto_reset_success and success_now.any():
+            env_ids = torch.nonzero(success_now, as_tuple=False).squeeze(-1)
+            env.reset(env_ids)
+            compiled.fsm.reset(env_ids)
+            success[env_ids] = False  # start new episode for those envs
+
+        # early stop: all envs succeeded or finished
+        if ((success | compiled.fsm.done).all()):
+            break
+
+    return {
+        "success_mask": success.detach().clone(),
+        "fsm_done_mask": compiled.fsm.done.detach().clone(),
+        "steps": t + 1,
+    }
+
+
+# --------------------------
+# Example: constructing TaskSpec (no JSON parser here)
+# --------------------------
+def make_example_task_spec() -> TaskSpec:
+    skills = [
+        SkillSpec("pick", {"object": "peg_small"}),
+        SkillSpec("align", {"object": "peg_small", "target_fixture": "alignment_jig_hole"}),
+        SkillSpec("insert", {"object": "peg_small", "target_fixture": "alignment_jig_hole", "depth": 0.02}),
+        SkillSpec("release", {"object": "peg_small"}),
+    ]
+    preds = [
+        PredicateSpec("object_in_fixture", {"object": "peg_small", "fixture": "alignment_jig_hole"}),
+        PredicateSpec("depth_in_range", {"object": "peg_small", "fixture": "alignment_jig_hole", "min_depth": 0.018, "max_depth": 0.022, "axis_w": [0, 0, 1]}),
+    ]
+    return TaskSpec(
+        task_id="peg_seat_001",
+        activity="Peg Alignment & Seating",
+        task_name="Insert Small Peg into Alignment Jig",
+        skills=skills,
+        goal=GoalSpec(summary="Insert peg into jig", success_conditions=preds),
+    )
diff --git a/llm_task_generator.py b/llm_task_generator.py
new file mode 100644
index 0000000..8b733b8
--- /dev/null
+++ b/llm_task_generator.py
@@ -0,0 +1,246 @@
+# llm_task_generator_activity.py
+from __future__ import annotations
+
+import os
+import json
+from typing import Any, Dict, List, Optional
+
+from openai import OpenAI
+
+# -----------------------------
+# OpenAI client / model
+# -----------------------------
+def _get_openai_client() -> "OpenAI":
+    if OpenAI is None:
+        raise RuntimeError(
+            "Python package `openai` is not installed. Install it (e.g. `pip install openai`) "
+            "to use generate_task_spec_from_activity()."
+        )
+    return OpenAI(api_key=os.environ.get("OPENAI_API_KEY"))
+MODEL_NAME = "gpt-4.1-mini"   # 필요 시 "gpt-4.1"로 변경
+
+# -----------------------------
+# Output contract (TaskSpec JSON)
+# -----------------------------
+TASK_SCHEMA_DESCRIPTION = """
+Output JSON ONLY (no markdown, no comments), with this exact structure:
+
+{
+  "task_id": string,
+  "activity": string,
+  "task_name": string,
+  "skills": [
+    { "name": string, "args": object }
+  ],
+  "goal": {
+    "summary": string,
+    "success_conditions": [
+      { "type": string, ...predicate args... }
+    ]
+  }
+}
+
+Rules:
+- Use only allowed objects/fixtures/containers/tools provided.
+- Use only allowed skills provided.
+- Use only allowed goal predicates provided.
+- Steps must be between min_steps and max_steps (inclusive).
+- Do NOT output coordinates, poses, or any continuous control targets.
+- Ensure preconditions: pick(object) must occur before place/align/insert/release for that object.
+- Skill args must use the EXACT keys specified in the "Skill argument schema" section of the prompt.
+"""
+
+DEFAULT_ALLOWED_SKILLS = [
+    "pick", "release", "place",
+    "align", "insert",
+]
+
+DEFAULT_ALLOWED_PREDICATES = [
+    "is_grasped",
+    "object_in_fixture",
+    "object_in_container",
+    "pose_in_tolerance",
+    "depth_in_range",
+    "fixture_state",
+    "button_pressed",
+    "switch_state",
+    "thread_engaged",
+]
+
+
+SKILL_ARG_SCHEMA: Dict[str, Dict[str, List[str]]] = {
+    "pick": {"required": ["object"], "optional": []},
+    "release": {"required": ["object"], "optional": []},
+    "place": {"required": ["object", "target"], "optional": []},
+    "align": {"required": ["object", "target_fixture"], "optional": []},
+    "insert": {"required": ["object", "target_fixture"], "optional": ["depth"]},
+}
+
+
+def _format_skill_arg_schema(allowed_skills: List[str]) -> str:
+    lines: List[str] = []
+    for skill_name in allowed_skills:
+        spec = SKILL_ARG_SCHEMA.get(skill_name)
+        if spec is None:
+            continue
+        req = ", ".join(spec["required"]) if spec["required"] else "(none)"
+        opt = ", ".join(spec["optional"]) if spec["optional"] else "(none)"
+        lines.append(f'- {skill_name}: required args = [{req}], optional args = [{opt}]')
+    if not lines:
+        return "- (no schema available)"
+    return "\n".join(lines)
+
+
+def _normalize_task_spec(task: Dict[str, Any]) -> Dict[str, Any]:
+    skills = task.get("skills", [])
+    if not isinstance(skills, list):
+        return task
+
+    for s in skills:
+        if not isinstance(s, dict):
+            continue
+        name = s.get("name")
+        args = s.get("args", {})
+        if not isinstance(args, dict):
+            args = {}
+
+        if name in ("align", "insert"):
+            if "target_fixture" not in args and "fixture" in args:
+                args["target_fixture"] = args.pop("fixture")
+
+        if name == "place":
+            if "target" not in args and "fixture" in args:
+                args["target"] = args.pop("fixture")
+
+        s["args"] = args
+
+    return task
+
+
+def _build_task_prompt_from_activity(
+    activity_key: str,
+    activity_def: Dict[str, Any],
+    *,
+    allowed_skills: List[str],
+    allowed_predicates: List[str],
+    min_steps: int,
+    max_steps: int,
+) -> str:
+    desc = activity_def.get("description", "")
+    objs = activity_def.get("allowed_objects", [])
+    fxs = activity_def.get("allowed_fixtures", [])
+    containers = activity_def.get("allowed_containers", [])
+    tools = activity_def.get("allowed_tools", [])
+    tags = activity_def.get("difficulty_tags", [])
+
+    # activity-specific overrides are allowed
+    activity_skills = activity_def.get("allowed_skills", allowed_skills)
+    activity_preds = activity_def.get("allowed_predicates", allowed_predicates)
+
+    return f"""
+You are generating a robotics task specification for a WORKBENCH dexterous manipulation setup.
+
+SELECTED ACTIVITY KEY: {activity_key}
+Activity description: {desc}
+Difficulty tags: {tags}
+
+Allowed entities:
+- objects: {objs}
+- fixtures: {fxs}
+- containers: {containers}
+- tools: {tools}
+
+Allowed skills (use EXACT names):
+{activity_skills}
+
+Allowed goal predicates (use EXACT names):
+{activity_preds}
+
+Skill argument schema (MUST follow EXACT arg keys):
+{_format_skill_arg_schema(activity_skills)}
+
+Hard constraints:
+- Output JSON only.
+- Do not invent new entities (must be from allowed lists).
+- Do not invent new skills/predicates.
+- Steps must be between {min_steps} and {max_steps}.
+- Must satisfy skill preconditions:
+  * pick(object) must happen before align/insert/place/release for that object
+  * release(object) should only happen after object was picked
+- No coordinates, no poses, no numeric target positions in skills.
+
+{TASK_SCHEMA_DESCRIPTION}
+
+Now generate ONE task JSON. Make it unique, concrete, and feasible for the selected activity.
+"""
+
+
+def _parse_json_strict(text: str) -> Dict[str, Any]:
+    text = text.strip()
+    # minimal cleanup for cases with accidental code fences
+    if text.startswith("```"):
+        text = text.strip("`")
+        # try to remove language hint
+        lines = text.splitlines()
+        if lines and lines[0].lower().startswith("json"):
+            text = "\n".join(lines[1:])
+    try:
+        return json.loads(text)
+    except json.JSONDecodeError as e:
+        raise RuntimeError(f"LLM output was not valid JSON.\n---\n{text}\n---") from e
+
+
+def generate_task_spec_from_activity(
+    activity_key: str,
+    activity_def: Dict[str, Any],
+    *,
+    model: str = MODEL_NAME,
+    temperature: float = 0.2,
+    max_output_tokens: int = 900,
+    min_steps: int = 5,
+    max_steps: int = 10,
+    allowed_skills: Optional[List[str]] = None,
+    allowed_predicates: Optional[List[str]] = None,
+) -> Dict[str, Any]:
+    """
+    Generate ONE TaskSpec JSON dict for a pre-defined activity.
+
+    Returns a dict like:
+      { task_id, activity, task_name, skills:[...], goal:{summary, success_conditions:[...]} }
+    """
+    if allowed_skills is None:
+        allowed_skills = DEFAULT_ALLOWED_SKILLS
+    if allowed_predicates is None:
+        allowed_predicates = DEFAULT_ALLOWED_PREDICATES
+
+    prompt = _build_task_prompt_from_activity(
+        activity_key,
+        activity_def,
+        allowed_skills=allowed_skills,
+        allowed_predicates=allowed_predicates,
+        min_steps=min_steps,
+        max_steps=max_steps,
+    )
+
+    client = _get_openai_client()
+    resp = client.responses.create(
+        model=model,
+        input=[
+            {"role": "system", "content": "You output strictly valid JSON task specs for robotics. No extra text."},
+            {"role": "user", "content": prompt},
+        ],
+        temperature=temperature,
+        max_output_tokens=max_output_tokens,
+    )
+
+    task = _parse_json_strict(resp.output_text)
+    task = _normalize_task_spec(task)
+
+    # Ensure activity field matches selected activity_key (stability)
+    task["activity"] = activity_key
+    if "task_id" not in task or not task["task_id"]:
+        task["task_id"] = f"{activity_key}_auto_0001"
+    if "task_name" not in task or not task["task_name"]:
+        task["task_name"] = task["task_id"]
+
+    return task
diff --git a/llm_task_validator.py b/llm_task_validator.py
new file mode 100644
index 0000000..1ca4744
--- /dev/null
+++ b/llm_task_validator.py
@@ -0,0 +1,37 @@
+from typing import Dict, Any
+
+ALLOWED_SKILLS = {
+    "pick": ["object"],
+    "align": ["object", "target_fixture"],
+    "insert": ["object", "target_fixture"],
+    "release": ["object"],
+}
+
+ALLOWED_PREDICATES = {
+    "object_in_fixture",
+    "depth_in_range",
+    "pose_in_tolerance",
+}
+
+
+def validate_task_spec(task: Dict[str, Any]) -> None:
+    assert "skills" in task
+    assert "goal" in task
+
+    # ---- skills ----
+    for s in task["skills"]:
+        name = s["name"]
+        args = s.get("args", {})
+
+        if name not in ALLOWED_SKILLS:
+            raise ValueError(f"Unknown skill: {name}")
+
+        required_args = ALLOWED_SKILLS[name]
+        for k in required_args:
+            if k not in args:
+                raise ValueError(f"Skill {name} missing arg: {k}")
+
+    # ---- predicates ----
+    for p in task["goal"]["success_conditions"]:
+        if p["type"] not in ALLOWED_PREDICATES:
+            raise ValueError(f"Unknown predicate: {p['type']}")
diff --git a/run.py b/run.py
new file mode 100644
index 0000000..67fa78f
--- /dev/null
+++ b/run.py
@@ -0,0 +1,65 @@
+import argparse
+import random
+from pathlib import Path
+
+from dotenv_loader import load_dotenv_into_environ
+from task_activities import WORKBENCH_ACTIVITIES
+
+# --------------------------------
+# Example workflow
+# --------------------------------
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "activity",
+        nargs="?",
+        help="Activity key to run (defaults to random).",
+    )
+    args = parser.parse_args()
+
+    # Load `.env` from this folder into `os.environ` before importing OpenAI client code.
+    load_dotenv_into_environ(Path(__file__).resolve().parent / ".env", override=False)
+
+    from llm_task_generator import generate_task_spec_from_activity
+    from llm_task_validator import ALLOWED_PREDICATES, ALLOWED_SKILLS, validate_task_spec
+    from llm_fsm_multi_env import (
+        TaskSpec,
+        LLMFSMCompilerBatched,
+        run_compiled_task_multi_env,
+    )
+        
+    # 1) select activity
+    if args.activity is not None:
+        if args.activity not in WORKBENCH_ACTIVITIES:
+            available = ", ".join(sorted(WORKBENCH_ACTIVITIES.keys()))
+            raise SystemExit(f"Unknown activity `{args.activity}`. Available: {available}")
+        activity_key = args.activity
+    else:
+        activity_key = random.choice(list(WORKBENCH_ACTIVITIES.keys()))
+    activity_def = WORKBENCH_ACTIVITIES[activity_key]
+
+    # 2) generate task under this activity
+    task_dict = generate_task_spec_from_activity(
+        activity_key,
+        activity_def,
+        allowed_skills=list(ALLOWED_SKILLS.keys()),
+        allowed_predicates=sorted(ALLOWED_PREDICATES),
+    )
+
+    validate_task_spec(task_dict)
+
+    # 3) convert dict → TaskSpec dataclass
+    task_spec = TaskSpec.from_dict(task_dict)
+
+    # 4) compile & run
+    compiler = LLMFSMCompilerBatched()
+    compiled = compiler.compile(env=batched_env, task_spec=task_spec)
+
+    # result = run_compiled_task_multi_env(compiled)
+
+    # print("Result:", result)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/task_activities.py b/task_activities.py
new file mode 100644
index 0000000..675461f
--- /dev/null
+++ b/task_activities.py
@@ -0,0 +1,35 @@
+from __future__ import annotations
+
+# activities.py
+
+WORKBENCH_ACTIVITIES = {
+    "peg_alignment": {
+        "description": "Aligning and inserting pegs into fixed jigs or holes.",
+        "allowed_objects": ["peg_small", "peg_large"],
+        "allowed_fixtures": ["alignment_jig_hole"],
+        "difficulty_tags": ["alignment", "insertion"],
+    },
+
+    "loose_fastening": {
+        "description": "Loosely fastening bolts into nut plates without full tightening.",
+        "allowed_objects": ["bolt_m3"],
+        "allowed_fixtures": ["nut_plate_hole"],
+        "difficulty_tags": ["threading", "rotation"],
+    },
+
+    "key_lock_rotation": {
+        "description": "Inserting a key and rotating it until a mechanical stop.",
+        "allowed_objects": ["flat_key"],
+        "allowed_fixtures": ["lock_slot"],
+        "difficulty_tags": ["insertion", "limited_rotation"],
+    },
+
+    "drawer_interaction": {
+        "description": "Opening drawers and moving parts in or out.",
+        "allowed_objects": ["small_gear"],
+        "allowed_fixtures": ["drawer"],
+        "difficulty_tags": ["fixture", "occlusion"],
+    },
+}
+
+