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57eab70 e6a02dd 57eab70 e6a02dd 57eab70 e6a02dd 57eab70 e6a02dd 57eab70 e6a02dd 57eab70 | 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 | # salespath_env/server/app.py
"""
Custom stateful FastAPI server for SalesPath.
Why not create_fastapi_app?
OpenEnv's built-in HTTP /reset and /step endpoints are STATELESS —
they create a new Environment instance per request and destroy it.
State is preserved only over WebSocket sessions.
For our training loop (HTTP polling), we need a persistent environment
that survives across /reset + multiple /step calls. This file provides
that by keeping a single global SalesPathEnvironment instance.
The response envelope matches OpenEnv exactly:
{ "observation": {...}, "reward": float, "done": bool }
so all existing clients work without changes.
"""
from typing import Any, Dict, Optional
from fastapi import FastAPI
from pydantic import BaseModel
from ..models import SalesPathAction
from .salespath_environment import SalesPathEnvironment
# ---------------------------------------------------------------------------
# Single persistent environment instance
# ---------------------------------------------------------------------------
_env: SalesPathEnvironment = SalesPathEnvironment()
# ---------------------------------------------------------------------------
# Request models
# ---------------------------------------------------------------------------
class ResetRequest(BaseModel):
difficulty: int = 1
seed: Optional[int] = None
episode_id: Optional[str] = None
class ActionPayload(BaseModel):
action_type: str
content: str = ""
target: str = ""
format_ok: bool = True
class StepRequest(BaseModel):
action: ActionPayload
# ---------------------------------------------------------------------------
# FastAPI app
# ---------------------------------------------------------------------------
app = FastAPI(
title="SalesPath Environment",
description="OpenEnv-compatible RL environment for B2B sales agent training.",
version="0.1.0",
)
@app.post("/reset")
def reset(req: ResetRequest = ResetRequest()):
"""Start a new episode."""
obs = _env.reset(
seed=req.seed,
episode_id=req.episode_id,
difficulty=req.difficulty,
)
return {
"observation": obs.model_dump(),
"reward": obs.reward,
"done": obs.done,
}
@app.post("/step")
def step(req: StepRequest):
"""Take one action in the current episode."""
action = SalesPathAction(
action_type=req.action.action_type,
content=req.action.content,
target=req.action.target,
format_ok=req.action.format_ok,
)
obs = _env.step(action)
return {
"observation": obs.model_dump(),
"reward": obs.reward,
"done": obs.done,
}
@app.get("/health")
def health():
return {"status": "healthy"}
@app.get("/state")
def state():
"""Expose internal state (for debugging). Hidden state excluded."""
s = _env.state
return {
"episode_id": s.episode_id,
"turn_number": s.turn_number,
"workflow_stage": s.workflow_stage,
"steps_completed": s.steps_completed,
"constraints_violated": s.constraints_violated,
"objections_handled": s.objections_handled,
"difficulty": s.difficulty,
"done": s.done,
"prospect_profile": s.prospect_profile,
} |