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Implement Phase 3: dynamic graph builder, blueprint persistence, and CRUD API

Browse source 
- Add dynamic_graph_builder.py that constructs LangGraph graphs at runtime
  from frontend CouncilBlueprint JSON (no more hardcoded graphs in production)
- Add PostgreSQL persistence via SQLAlchemy async with Blueprint model
- Add blueprint CRUD endpoints (POST/GET/PUT/DELETE /api/councils/)
- Add POST /api/councils/{id}/run to execute blueprints dynamically
- Add Alembic migration infrastructure with initial blueprints table
- Add database.py with async engine and SQLite fallback for dev/test
- Fix missing typing-extensions and add aiosqlite dependency
- Add 42 new tests (80/80 total passing) covering dynamic graph building,
  blueprint service CRUD, and API integration

https://claude.ai/code/session_014yZUxrPsgZbvkebXbCXR4U
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Claude 2026-02-21 10:28:27 +00:00
parent 89ba3aacd4
commit 437db4ca68
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16 changed files with 1698 additions and 11 deletions
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36
backend/alembic.ini Normal file
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@ -0,0 +1,36 @@
[alembic]
script_location = alembic
sqlalchemy.url = postgresql+asyncpg://user:password@localhost:5432/councilOS
[loggers]
keys = root,sqlalchemy,alembic
[handlers]
keys = console
[formatters]
keys = generic
[logger_root]
level = WARN
handlers = console
[logger_sqlalchemy]
level = WARN
handlers =
qualname = sqlalchemy.engine
[logger_alembic]
level = INFO
handlers =
qualname = alembic
[handler_console]
class = StreamHandler
args = (sys.stderr,)
level = NOTSET
formatter = generic
[formatter_generic]
format = %(levelname)-5.5s [%(name)s] %(message)s
datefmt = %H:%M:%S

74
backend/alembic/env.py Normal file
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@ -0,0 +1,74 @@
"""Alembic environment configuration for async SQLAlchemy."""
import asyncio
import os
import sys
from logging.config import fileConfig
from alembic import context
from sqlalchemy import pool
from sqlalchemy.ext.asyncio import async_engine_from_config
# Add the backend directory to sys.path so we can import our models
sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
from models.blueprint import Base # noqa: E402
# Alembic Config object
config = context.config
# Override sqlalchemy.url from environment variable if present
database_url = os.environ.get("DATABASE_URL")
if database_url:
config.set_main_option("sqlalchemy.url", database_url)
if config.config_file_name is not None:
fileConfig(config.config_file_name)
target_metadata = Base.metadata
def run_migrations_offline() -> None:
"""Run migrations in 'offline' mode (generate SQL without DB connection)."""
url = config.get_main_option("sqlalchemy.url")
context.configure(
url=url,
target_metadata=target_metadata,
literal_binds=True,
dialect_opts={"paramstyle": "named"},
)
with context.begin_transaction():
context.run_migrations()
def do_run_migrations(connection):
"""Run migrations using a sync connection."""
context.configure(connection=connection, target_metadata=target_metadata)
with context.begin_transaction():
context.run_migrations()
async def run_async_migrations() -> None:
"""Run migrations in 'online' mode with an async engine."""
connectable = async_engine_from_config(
config.get_section(config.config_ini_section, {}),
prefix="sqlalchemy.",
poolclass=pool.NullPool,
)
async with connectable.connect() as connection:
await connection.run_sync(do_run_migrations)
await connectable.dispose()
def run_migrations_online() -> None:
"""Run migrations in 'online' mode."""
asyncio.run(run_async_migrations())
if context.is_offline_mode():
run_migrations_offline()
else:
run_migrations_online()

26
backend/alembic/script.py.mako Normal file
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@ -0,0 +1,26 @@
"""${message}
Revision ID: ${up_revision}
Revises: ${down_revision | comma,n}
Create Date: ${create_date}
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa
${imports if imports else ""}
# revision identifiers, used by Alembic.
revision: str = ${repr(up_revision)}
down_revision: Union[str, None] = ${repr(down_revision)}
branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
def upgrade() -> None:
${upgrades if upgrades else "pass"}
def downgrade() -> None:
${downgrades if downgrades else "pass"}

42
backend/alembic/versions/001_create_blueprints_table.py Normal file
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@ -0,0 +1,42 @@
"""Create blueprints table
Revision ID: 001
Revises: None
Create Date: 2026-02-20
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa
revision: str = "001"
down_revision: Union[str, None] = None
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None
def upgrade() -> None:
op.create_table(
"blueprints",
sa.Column("id", sa.String(36), primary_key=True),
sa.Column("version", sa.Integer(), nullable=False, server_default="1"),
sa.Column("name", sa.String(255), nullable=False),
sa.Column("nodes", sa.JSON(), nullable=False, server_default="[]"),
sa.Column("edges", sa.JSON(), nullable=False, server_default="[]"),
sa.Column(
"created_at",
sa.DateTime(timezone=True),
nullable=False,
server_default=sa.func.now(),
),
sa.Column(
"updated_at",
sa.DateTime(timezone=True),
nullable=False,
server_default=sa.func.now(),
),
)
def downgrade() -> None:
op.drop_table("blueprints")

153
backend/api/blueprint_routes.py Normal file
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@ -0,0 +1,153 @@
"""
REST API routes for council blueprint CRUD.
Endpoints:
GET /api/councils/ — List all blueprints
POST /api/councils/ — Create a new blueprint
GET /api/councils/{id} — Get a specific blueprint
PUT /api/councils/{id} — Update a blueprint
DELETE /api/councils/{id} — Delete a blueprint
"""
from typing import List, Optional
from fastapi import APIRouter, Depends, HTTPException
from pydantic import BaseModel, Field
from sqlalchemy.ext.asyncio import AsyncSession
from database import get_session
from services.blueprint_service import (
create_blueprint,
delete_blueprint,
get_blueprint,
list_blueprints,
update_blueprint,
)
blueprint_router = APIRouter()
# ---------------------------------------------------------------------------
# Request / Response Models
# ---------------------------------------------------------------------------
class AgentTools(BaseModel):
webSearch: bool = False
pdfReader: bool = False
class BlueprintNodeSchema(BaseModel):
id: str
label: str
systemPrompt: str = ""
model: str = "claude-3-5-sonnet"
tools: AgentTools = Field(default_factory=AgentTools)
position: dict = Field(default_factory=lambda: {"x": 0, "y": 0})
class BlueprintEdgeSchema(BaseModel):
id: str
source: str
target: str
type: str = "linear"
condition: Optional[str] = None
class BlueprintCreateRequest(BaseModel):
version: int = 1
name: str = Field(..., min_length=1, max_length=255)
nodes: List[BlueprintNodeSchema]
edges: List[BlueprintEdgeSchema] = []
id: Optional[str] = None
class BlueprintUpdateRequest(BaseModel):
name: Optional[str] = Field(None, min_length=1, max_length=255)
nodes: Optional[List[BlueprintNodeSchema]] = None
edges: Optional[List[BlueprintEdgeSchema]] = None
class BlueprintResponse(BaseModel):
id: str
version: int
name: str
nodes: list
edges: list
createdAt: Optional[str] = None
updatedAt: Optional[str] = None
# ---------------------------------------------------------------------------
# Endpoints
# ---------------------------------------------------------------------------
@blueprint_router.get("/councils/", response_model=List[BlueprintResponse])
async def list_all_blueprints(
session: AsyncSession = Depends(get_session),
):
"""List all council blueprints."""
blueprints = await list_blueprints(session)
return [bp.to_dict() for bp in blueprints]
@blueprint_router.post(
"/councils/",
response_model=BlueprintResponse,
status_code=201,
)
async def create_new_blueprint(
request: BlueprintCreateRequest,
session: AsyncSession = Depends(get_session),
):
"""Create a new council blueprint."""
bp = await create_blueprint(
session=session,
name=request.name,
nodes=[n.model_dump() for n in request.nodes],
edges=[e.model_dump() for e in request.edges],
blueprint_id=request.id,
version=request.version,
)
return bp.to_dict()
@blueprint_router.get("/councils/{blueprint_id}", response_model=BlueprintResponse)
async def get_single_blueprint(
blueprint_id: str,
session: AsyncSession = Depends(get_session),
):
"""Retrieve a specific blueprint by ID."""
bp = await get_blueprint(session, blueprint_id)
if bp is None:
raise HTTPException(status_code=404, detail=f"Blueprint '{blueprint_id}' not found.")
return bp.to_dict()
@blueprint_router.put("/councils/{blueprint_id}", response_model=BlueprintResponse)
async def update_existing_blueprint(
blueprint_id: str,
request: BlueprintUpdateRequest,
session: AsyncSession = Depends(get_session),
):
"""Update an existing blueprint."""
bp = await update_blueprint(
session=session,
blueprint_id=blueprint_id,
name=request.name,
nodes=[n.model_dump() for n in request.nodes] if request.nodes is not None else None,
edges=[e.model_dump() for e in request.edges] if request.edges is not None else None,
)
if bp is None:
raise HTTPException(status_code=404, detail=f"Blueprint '{blueprint_id}' not found.")
return bp.to_dict()
@blueprint_router.delete("/councils/{blueprint_id}", status_code=204)
async def delete_existing_blueprint(
blueprint_id: str,
session: AsyncSession = Depends(get_session),
):
"""Delete a blueprint by ID."""
deleted = await delete_blueprint(session, blueprint_id)
if not deleted:
raise HTTPException(status_code=404, detail=f"Blueprint '{blueprint_id}' not found.")

82
backend/api/routes.py
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@ -2,17 +2,22 @@
REST API routes for CouncilOS.
Endpoints:
POST /api/councils/run — Start a new council run (async, returns run_id)
POST /api/councils/run — Start a new council run (Phase 1 hard-coded graph)
POST /api/councils/{id}/run — Start a run from a saved blueprint (Phase 3)
GET /api/councils/run/{run_id} — Poll the status/result of a run
GET /api/health — Health check
"""
import uuid
from typing import Optional
from fastapi import APIRouter, HTTPException, BackgroundTasks
from fastapi import APIRouter, Depends, HTTPException, BackgroundTasks
from pydantic import BaseModel, Field
from sqlalchemy.ext.asyncio import AsyncSession
from services.graph_builder import run_council_async
from services.dynamic_graph_builder import run_blueprint_council_async
from services.blueprint_service import get_blueprint
from database import get_session
from api.run_store import run_store
@ -64,7 +69,7 @@ async def start_council_run(
background_tasks: BackgroundTasks,
):
"""
Start a new council run.
Start a new council run using the Phase 1 hard-coded graph.
The run executes asynchronously in the background. Poll
GET /api/councils/run/{run_id} for the result, or connect to the
@ -85,6 +90,45 @@ async def start_council_run(
)
@router.post(
"/councils/{blueprint_id}/run",
response_model=CouncilRunResponse,
status_code=202,
)
async def start_blueprint_run(
blueprint_id: str,
request: CouncilRunRequest,
background_tasks: BackgroundTasks,
session: AsyncSession = Depends(get_session),
):
"""
Start a council run using a saved blueprint (Phase 3 dynamic graph).
Reads the blueprint from PostgreSQL and dynamically constructs the
LangGraph execution graph at runtime.
"""
bp = await get_blueprint(session, blueprint_id)
if bp is None:
raise HTTPException(status_code=404, detail=f"Blueprint '{blueprint_id}' not found.")
run_id = str(uuid.uuid4())
run_store.create(run_id, request.input_topic)
blueprint_dict = bp.to_dict()
background_tasks.add_task(
_execute_blueprint_run, run_id, request.input_topic, blueprint_dict
)
return CouncilRunResponse(
run_id=run_id,
status="pending",
message=(
f"Council run started from blueprint '{bp.name}'. "
f"Connect to /ws/council/{run_id} for live updates."
),
)
@router.get("/councils/run/{run_id}", response_model=CouncilResultResponse)
async def get_council_result(run_id: str):
"""
@ -110,7 +154,7 @@ async def get_council_result(run_id: str):
async def _execute_run(run_id: str, input_topic: str) -> None:
"""
Background task that runs the LangGraph council and updates the run store.
Background task that runs the Phase 1 hard-coded LangGraph council.
"""
run_store.update(run_id, {"status": "running"})
try:
@ -133,3 +177,33 @@ async def _execute_run(run_id: str, input_topic: str) -> None:
)
except Exception as exc: # noqa: BLE001
run_store.update(run_id, {"status": "failed", "error": str(exc)})
async def _execute_blueprint_run(
run_id: str, input_topic: str, blueprint: dict
) -> None:
"""
Background task that runs a dynamically built LangGraph from a blueprint.
"""
run_store.update(run_id, {"status": "running"})
try:
final_state = await run_blueprint_council_async(
blueprint=blueprint,
input_topic=input_topic,
run_id=run_id,
on_node_event=lambda nid, node: run_store.update(
nid, {"active_node": node}
),
)
run_store.update(
run_id,
{
"status": "completed",
"final_draft": final_state.get("current_draft"),
"critic_score": final_state.get("critic_score"),
"iteration_count": final_state.get("iteration_count"),
"active_node": "done",
},
)
except Exception as exc: # noqa: BLE001
run_store.update(run_id, {"status": "failed", "error": str(exc)})

48
backend/database.py Normal file
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@ -0,0 +1,48 @@
"""
Database connection management for CouncilOS.
Provides an async SQLAlchemy engine and session factory backed by PostgreSQL.
Falls back to SQLite for development/testing if DATABASE_URL is not set.
"""
import os
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
DATABASE_URL = os.environ.get(
"DATABASE_URL",
"sqlite+aiosqlite:///./councilOS_dev.db",
)
# For SQLite async support, replace the driver if needed
if DATABASE_URL.startswith("sqlite"):
connect_args = {"check_same_thread": False}
else:
connect_args = {}
engine = create_async_engine(
DATABASE_URL,
echo=False,
connect_args=connect_args,
)
async_session = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
async def get_session() -> AsyncSession:
"""Dependency that yields an async database session."""
async with async_session() as session:
yield session
async def init_db() -> None:
"""Create all tables. Used at application startup."""
from models.blueprint import Base
async with engine.begin() as conn:
await conn.run_sync(Base.metadata.create_all)
async def close_db() -> None:
"""Dispose of the engine connection pool."""
await engine.dispose()

16
backend/main.py
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@ -5,7 +5,13 @@ Start the server:
uvicorn main:app --reload --port 8000
API Overview:
POST /api/councils/run — Start a council run
POST /api/councils/ — Create a blueprint
GET /api/councils/ — List all blueprints
GET /api/councils/{id} — Get specific blueprint
PUT /api/councils/{id} — Update a blueprint
DELETE /api/councils/{id} — Delete a blueprint
POST /api/councils/run — Start a run (Phase 1 hard-coded graph)
POST /api/councils/{id}/run — Start a run from a blueprint (Phase 3)
GET /api/councils/run/{run_id} — Poll run status/result
GET /api/health — Health check
WS /ws/council/{run_id} — Real-time agent status events
@ -16,14 +22,19 @@ from fastapi import FastAPI
from fastapi.middleware.cors import CORSMiddleware
from api.routes import router
from api.blueprint_routes import blueprint_router
from api.websocket import ws_router
from database import init_db, close_db
@asynccontextmanager
async def lifespan(app: FastAPI):
"""Application lifespan: startup and shutdown logic."""
print("CouncilOS API starting up...")
await init_db()
print("Database initialized.")
yield
await close_db()
print("CouncilOS API shutting down...")
@ -34,7 +45,7 @@ app = FastAPI(
"Orchestrates LangGraph council runs and streams real-time agent "
"status via WebSockets."
),
version="0.1.0",
version="0.2.0",
lifespan=lifespan,
)
@ -49,6 +60,7 @@ app.add_middleware(
# Mount REST routes under /api prefix
app.include_router(router, prefix="/api")
app.include_router(blueprint_router, prefix="/api")
# Mount WebSocket routes (no prefix — path is /ws/council/{run_id})
app.include_router(ws_router)

5
backend/models/__init__.py Normal file
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@ -0,0 +1,5 @@
"""SQLAlchemy database models for CouncilOS."""
from .blueprint import Blueprint
__all__ = ["Blueprint"]

62
backend/models/blueprint.py Normal file
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@ -0,0 +1,62 @@
"""
Blueprint model — stores council blueprints as JSON in PostgreSQL.
Each blueprint represents a complete council graph configuration created
by the user in the "Rat-Architekt" (Setup Mode) frontend tab.
"""
import uuid
from datetime import datetime, timezone
from sqlalchemy import Column, DateTime, Integer, JSON, String
from sqlalchemy.orm import DeclarativeBase
class Base(DeclarativeBase):
"""SQLAlchemy declarative base for all models."""
pass
class Blueprint(Base):
"""
A council blueprint stored in PostgreSQL.
The nodes and edges are stored as JSON columns matching the
CouncilBlueprint TypeScript interface from the frontend.
"""
__tablename__ = "blueprints"
id = Column(
String(36),
primary_key=True,
default=lambda: str(uuid.uuid4()),
)
version = Column(Integer, nullable=False, default=1)
name = Column(String(255), nullable=False)
nodes = Column(JSON, nullable=False, default=list)
edges = Column(JSON, nullable=False, default=list)
created_at = Column(
DateTime(timezone=True),
nullable=False,
default=lambda: datetime.now(timezone.utc),
)
updated_at = Column(
DateTime(timezone=True),
nullable=False,
default=lambda: datetime.now(timezone.utc),
onupdate=lambda: datetime.now(timezone.utc),
)
def to_dict(self) -> dict:
"""Serialize to the CouncilBlueprint JSON format expected by the frontend."""
return {
"id": self.id,
"version": self.version,
"name": self.name,
"nodes": self.nodes,
"edges": self.edges,
"createdAt": self.created_at.isoformat() if self.created_at else None,
"updatedAt": self.updated_at.isoformat() if self.updated_at else None,
}

2
backend/requirements.txt
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@ -12,6 +12,7 @@ python-multipart>=0.0.9
# Database
asyncpg>=0.29.0
aiosqlite>=0.20.0
sqlalchemy[asyncio]>=2.0.0
alembic>=1.13.0
@ -26,6 +27,7 @@ tavily-python>=0.3.0
python-dotenv>=1.0.0
pydantic>=2.0.0
pydantic-settings>=2.0.0
typing-extensions>=4.5.0
# Linting and formatting
ruff>=0.4.0

95
backend/services/blueprint_service.py Normal file
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@ -0,0 +1,95 @@
"""
Blueprint Service — CRUD operations for council blueprints.
Handles persistence of blueprints to PostgreSQL via SQLAlchemy async sessions.
"""
from datetime import datetime, timezone
from typing import List, Optional
from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession
from models.blueprint import Blueprint
async def create_blueprint(
session: AsyncSession,
name: str,
nodes: list,
edges: list,
blueprint_id: Optional[str] = None,
version: int = 1,
) -> Blueprint:
"""Create and persist a new blueprint."""
bp = Blueprint(
name=name,
version=version,
nodes=nodes,
edges=edges,
)
if blueprint_id:
bp.id = blueprint_id
session.add(bp)
await session.commit()
await session.refresh(bp)
return bp
async def get_blueprint(
session: AsyncSession,
blueprint_id: str,
) -> Optional[Blueprint]:
"""Retrieve a blueprint by ID."""
result = await session.execute(
select(Blueprint).where(Blueprint.id == blueprint_id)
)
return result.scalar_one_or_none()
async def list_blueprints(session: AsyncSession) -> List[Blueprint]:
"""Retrieve all blueprints, ordered by most recently updated."""
result = await session.execute(
select(Blueprint).order_by(Blueprint.updated_at.desc())
)
return list(result.scalars().all())
async def update_blueprint(
session: AsyncSession,
blueprint_id: str,
name: Optional[str] = None,
nodes: Optional[list] = None,
edges: Optional[list] = None,
) -> Optional[Blueprint]:
"""Update an existing blueprint. Returns None if not found."""
bp = await get_blueprint(session, blueprint_id)
if bp is None:
return None
if name is not None:
bp.name = name
if nodes is not None:
bp.nodes = nodes
if edges is not None:
bp.edges = edges
bp.updated_at = datetime.now(timezone.utc)
await session.commit()
await session.refresh(bp)
return bp
async def delete_blueprint(
session: AsyncSession,
blueprint_id: str,
) -> bool:
"""Delete a blueprint by ID. Returns True if deleted, False if not found."""
bp = await get_blueprint(session, blueprint_id)
if bp is None:
return False
await session.delete(bp)
await session.commit()
return True

393
backend/services/dynamic_graph_builder.py Normal file
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@ -0,0 +1,393 @@
"""
Dynamic Graph Builder — constructs LangGraph graphs from JSON blueprints.
This is the Phase 3 replacement for the hard-coded graph in graph_builder.py.
It reads a CouncilBlueprint JSON (as produced by the frontend parser) and
dynamically constructs the LangGraph StateGraph with the correct nodes,
edges, and conditional routing.
"""
import asyncio
import os
from typing import Any, Callable, Dict, List, Optional
from langchain_anthropic import ChatAnthropic
from langchain_core.messages import HumanMessage, SystemMessage
from langchain_openai import ChatOpenAI
from langgraph.graph import END, StateGraph
from state import CouncilState, APPROVAL_THRESHOLD, MAX_ITERATIONS
# ---------------------------------------------------------------------------
# LLM factory — maps model names from the frontend to LangChain chat models
# ---------------------------------------------------------------------------
_MODEL_MAP = {
"claude-3-5-sonnet": lambda: ChatAnthropic(
model="claude-3-5-sonnet-20241022",
api_key=os.environ.get("ANTHROPIC_API_KEY"),
temperature=0.7,
max_tokens=4096,
),
"gpt-4o": lambda: ChatOpenAI(
model="gpt-4o",
api_key=os.environ.get("OPENAI_API_KEY"),
temperature=0.7,
max_tokens=4096,
),
}
def _get_llm(model_name: str) -> Any:
"""Instantiate a LangChain chat model by frontend model name."""
factory = _MODEL_MAP.get(model_name)
if factory is None:
raise ValueError(
f"Unknown model '{model_name}'. "
f"Supported models: {list(_MODEL_MAP.keys())}"
)
return factory()
# ---------------------------------------------------------------------------
# Generic agent node factory
# ---------------------------------------------------------------------------
def _make_agent_node(
node_id: str,
label: str,
system_prompt: str,
model_name: str,
) -> Callable[[CouncilState], dict]:
"""
Create a LangGraph node function for a user-defined agent.
Each node function reads the CouncilState, calls the configured LLM
with the agent's system prompt, and returns updated state fields.
Args:
node_id: Unique node ID from the blueprint.
label: Display name of the agent (used in prompts).
system_prompt: The persona / role definition for this agent.
model_name: Which LLM to use ("claude-3-5-sonnet" | "gpt-4o").
Returns:
A callable (CouncilState) -> dict suitable for StateGraph.add_node().
"""
def agent_node(state: CouncilState) -> dict:
llm = _get_llm(model_name)
# Build user prompt from current state
if not state["current_draft"]:
user_content = (
f"Please work on the following topic:\n\n{state['input_topic']}"
)
elif state["feedback_history"]:
feedback_block = "\n\n---\n".join(
f"Feedback round {i + 1}:\n{fb}"
for i, fb in enumerate(state["feedback_history"])
)
user_content = (
f"Topic: {state['input_topic']}\n\n"
f"Current draft:\n{state['current_draft']}\n\n"
f"Feedback ({len(state['feedback_history'])} round(s)):\n\n"
f"{feedback_block}\n\n"
f"Please produce an improved version."
)
else:
user_content = (
f"Topic: {state['input_topic']}\n\n"
f"Current draft:\n{state['current_draft']}\n\n"
f"Please review and improve this draft."
)
system_msg = SystemMessage(content=system_prompt)
user_msg = HumanMessage(content=user_content)
response = llm.invoke([system_msg, user_msg])
return {
"current_draft": response.content,
"messages": [system_msg, user_msg, response],
"active_node": node_id,
"iteration_count": state.get("iteration_count", 0) + 1,
}
agent_node.__name__ = f"agent_{node_id}"
return agent_node
# ---------------------------------------------------------------------------
# Conditional routing
# ---------------------------------------------------------------------------
def _make_conditional_router(
source_id: str,
conditional_edges: List[Dict[str, str]],
linear_target: Optional[str],
) -> Callable[[CouncilState], str]:
"""
Build a conditional routing function for edges originating from source_id.
This looks at `route_decision` in the state and maps it to the correct
target node ID using the condition labels from the blueprint edges.
Args:
source_id: The node that has outgoing conditional edges.
conditional_edges: List of {"target": node_id, "condition": "..."}.
linear_target: Fallback target if no condition matches (from linear edges).
Returns:
A function (CouncilState) -> str returning the next node ID.
"""
condition_map = {e["condition"]: e["target"] for e in conditional_edges}
def router(state: CouncilState) -> str:
decision = state.get("route_decision", "")
if decision in condition_map:
return condition_map[decision]
# If there's a linear fallback, use it
if linear_target:
return linear_target
# Default: return first conditional target as fallback
if conditional_edges:
return conditional_edges[0]["target"]
return END
router.__name__ = f"route_from_{source_id}"
return router
# ---------------------------------------------------------------------------
# Critic-style node detection and creation
# ---------------------------------------------------------------------------
_CRITIC_KEYWORDS = {"critic", "kritik", "bewert", "evaluat", "review", "score"}
def _is_critic_like(system_prompt: str) -> bool:
"""Heuristic: does this agent's prompt suggest it's a critic/evaluator?"""
lower = system_prompt.lower()
return any(kw in lower for kw in _CRITIC_KEYWORDS)
def _make_critic_node(
node_id: str,
label: str,
system_prompt: str,
model_name: str,
) -> Callable[[CouncilState], dict]:
"""
Create a critic-style node that scores and routes.
This node evaluates the current draft and sets route_decision
to "approve" or "rework" based on the score.
"""
import re
critic_system = (
system_prompt + "\n\n"
"IMPORTANT: You must respond in EXACTLY this format:\n\n"
"SCORE: <integer 0-10>\n"
"VERDICT: <\"approve\" if score >= 8, otherwise \"rework\">\n"
"FEEDBACK:\n"
"<detailed, actionable feedback>\n\n"
"Scoring: 0-3 poor, 4-6 adequate, 7 good, 8-9 high quality, 10 exceptional."
)
def critic_node(state: CouncilState) -> dict:
# Safety valve
if state.get("iteration_count", 0) >= MAX_ITERATIONS:
return {
"route_decision": "approve",
"critic_score": APPROVAL_THRESHOLD,
"feedback_history": [
f"[Auto-approved after {MAX_ITERATIONS} iterations]"
],
"messages": [],
"active_node": node_id,
}
llm = _get_llm(model_name)
system_msg = SystemMessage(content=critic_system)
user_msg = HumanMessage(
content=(
f"Evaluate this draft on the topic '{state['input_topic']}':\n\n"
f"{state['current_draft']}"
)
)
response = llm.invoke([system_msg, user_msg])
# Parse structured response
score_match = re.search(r"SCORE:\s*(\d+(?:\.\d+)?)", response.content)
feedback_match = re.search(r"FEEDBACK:\s*(.*)", response.content, re.DOTALL)
score = float(score_match.group(1)) if score_match else 0.0
score = max(0.0, min(10.0, score))
feedback = feedback_match.group(1).strip() if feedback_match else response.content.strip()
route_decision = "approve" if score >= APPROVAL_THRESHOLD else "rework"
result: dict = {
"critic_score": score,
"route_decision": route_decision,
"messages": [system_msg, user_msg, response],
"active_node": node_id,
}
if route_decision == "rework":
result["feedback_history"] = [f"Score: {score}/10\n{feedback}"]
return result
critic_node.__name__ = f"critic_{node_id}"
return critic_node
# ---------------------------------------------------------------------------
# Main: build graph from blueprint JSON
# ---------------------------------------------------------------------------
def build_graph_from_blueprint(blueprint: dict) -> Any:
"""
Dynamically construct a compiled LangGraph from a CouncilBlueprint JSON.
Args:
blueprint: A dict matching the CouncilBlueprint schema:
{
"version": 1,
"name": "...",
"nodes": [{"id", "label", "systemPrompt", "model", "tools", "position"}],
"edges": [{"id", "source", "target", "type", "condition?"}]
}
Returns:
A compiled LangGraph StateGraph ready for invocation.
Raises:
ValueError: If the blueprint is invalid (no nodes, no entry point, etc.)
"""
nodes = blueprint.get("nodes", [])
edges = blueprint.get("edges", [])
if not nodes:
raise ValueError("Blueprint has no nodes.")
# Build node lookup
node_lookup = {n["id"]: n for n in nodes}
# Find entry point: the node that has no incoming edges
targets = {e["target"] for e in edges}
entry_candidates = [n["id"] for n in nodes if n["id"] not in targets]
if not entry_candidates:
# All nodes have incoming edges (pure cycle) — use first node
entry_candidates = [nodes[0]["id"]]
entry_node_id = entry_candidates[0]
# Find terminal nodes: nodes that have no outgoing edges
sources = {e["source"] for e in edges}
terminal_nodes = {n["id"] for n in nodes if n["id"] not in sources}
# Build the StateGraph
graph = StateGraph(CouncilState)
# Register all nodes
for node in nodes:
nid = node["id"]
label = node.get("label", nid)
system_prompt = node.get("systemPrompt", f"You are {label}.")
model_name = node.get("model", "claude-3-5-sonnet")
if _is_critic_like(system_prompt):
node_fn = _make_critic_node(nid, label, system_prompt, model_name)
else:
node_fn = _make_agent_node(nid, label, system_prompt, model_name)
graph.add_node(nid, node_fn)
# Set entry point
graph.set_entry_point(entry_node_id)
# Group edges by source
edges_by_source: Dict[str, Dict[str, list]] = {}
for edge in edges:
src = edge["source"]
if src not in edges_by_source:
edges_by_source[src] = {"linear": [], "conditional": []}
if edge.get("type") == "conditional":
edges_by_source[src]["conditional"].append(edge)
else:
edges_by_source[src]["linear"].append(edge)
# Add edges
for source_id, grouped in edges_by_source.items():
linear = grouped["linear"]
conditional = grouped["conditional"]
if conditional:
# Build conditional routing
linear_target = linear[0]["target"] if linear else None
router = _make_conditional_router(source_id, conditional, linear_target)
# Build the mapping dict for add_conditional_edges
route_map: Dict[str, str] = {}
for ce in conditional:
route_map[ce["target"]] = ce["target"]
if linear_target:
route_map[linear_target] = linear_target
graph.add_conditional_edges(source_id, router, route_map)
elif linear:
# Simple linear edge (only one target expected)
graph.add_edge(source_id, linear[0]["target"])
# Terminal nodes → END
for tid in terminal_nodes:
if tid not in edges_by_source:
graph.add_edge(tid, END)
return graph.compile()
async def run_blueprint_council_async(
blueprint: dict,
input_topic: str,
run_id: str,
on_node_event: Optional[Callable[[str, str], Any]] = None,
) -> CouncilState:
"""
Execute a council run using a dynamically built graph from a blueprint.
Args:
blueprint: The CouncilBlueprint JSON dict.
input_topic: The user's prompt.
run_id: Unique identifier for this run.
on_node_event: Optional callback for WebSocket node events.
Returns:
The final CouncilState after execution completes.
"""
compiled_graph = build_graph_from_blueprint(blueprint)
initial_state = CouncilState(
input_topic=input_topic,
current_draft="",
feedback_history=[],
route_decision="",
messages=[],
iteration_count=0,
critic_score=None,
run_id=run_id,
active_node="",
)
loop = asyncio.get_event_loop()
final_state = await loop.run_in_executor(
None,
lambda: compiled_graph.invoke(initial_state),
)
return final_state

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"""
Integration tests for the blueprint CRUD REST endpoints.
Overrides the database dependency to use an in-memory SQLite database.
"""
import sys
import os
sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
import pytest
import pytest_asyncio
from httpx import AsyncClient, ASGITransport
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
from models.blueprint import Base
from database import get_session
from main import app
# ---------------------------------------------------------------------------
# Test database setup
# ---------------------------------------------------------------------------
TEST_DATABASE_URL = "sqlite+aiosqlite:///:memory:"
test_engine = create_async_engine(TEST_DATABASE_URL, echo=False)
TestSessionLocal = async_sessionmaker(test_engine, class_=AsyncSession, expire_on_commit=False)
async def override_get_session():
async with TestSessionLocal() as session:
yield session
app.dependency_overrides[get_session] = override_get_session
@pytest_asyncio.fixture(autouse=True)
async def setup_db():
"""Create and tear down tables for each test."""
async with test_engine.begin() as conn:
await conn.run_sync(Base.metadata.create_all)
yield
async with test_engine.begin() as conn:
await conn.run_sync(Base.metadata.drop_all)
@pytest_asyncio.fixture
async def client():
transport = ASGITransport(app=app)
async with AsyncClient(transport=transport, base_url="http://test") as c:
yield c
# ---------------------------------------------------------------------------
# Sample payload
# ---------------------------------------------------------------------------
SAMPLE_BLUEPRINT = {
"version": 1,
"name": "Test Council",
"nodes": [
{
"id": "node-1",
"label": "Master",
"systemPrompt": "You are the master writer.",
"model": "claude-3-5-sonnet",
"tools": {"webSearch": False, "pdfReader": False},
"position": {"x": 0, "y": 0},
},
{
"id": "node-2",
"label": "Critic",
"systemPrompt": "You evaluate drafts.",
"model": "claude-3-5-sonnet",
"tools": {"webSearch": False, "pdfReader": False},
"position": {"x": 300, "y": 0},
},
],
"edges": [
{"id": "edge-1", "source": "node-1", "target": "node-2", "type": "linear"},
],
}
# ---------------------------------------------------------------------------
# Tests
# ---------------------------------------------------------------------------
class TestBlueprintEndpoints:
@pytest.mark.asyncio
async def test_create_blueprint(self, client):
response = await client.post("/api/councils/", json=SAMPLE_BLUEPRINT)
assert response.status_code == 201
data = response.json()
assert data["name"] == "Test Council"
assert data["version"] == 1
assert len(data["nodes"]) == 2
assert "id" in data
@pytest.mark.asyncio
async def test_list_blueprints(self, client):
await client.post("/api/councils/", json=SAMPLE_BLUEPRINT)
await client.post(
"/api/councils/",
json={**SAMPLE_BLUEPRINT, "name": "Second Council"},
)
response = await client.get("/api/councils/")
assert response.status_code == 200
data = response.json()
assert len(data) == 2
@pytest.mark.asyncio
async def test_get_blueprint(self, client):
create_resp = await client.post("/api/councils/", json=SAMPLE_BLUEPRINT)
bp_id = create_resp.json()["id"]
response = await client.get(f"/api/councils/{bp_id}")
assert response.status_code == 200
assert response.json()["name"] == "Test Council"
@pytest.mark.asyncio
async def test_get_nonexistent_returns_404(self, client):
response = await client.get("/api/councils/nonexistent-id")
assert response.status_code == 404
@pytest.mark.asyncio
async def test_update_blueprint(self, client):
create_resp = await client.post("/api/councils/", json=SAMPLE_BLUEPRINT)
bp_id = create_resp.json()["id"]
update_resp = await client.put(
f"/api/councils/{bp_id}",
json={"name": "Renamed Council"},
)
assert update_resp.status_code == 200
assert update_resp.json()["name"] == "Renamed Council"
@pytest.mark.asyncio
async def test_update_nonexistent_returns_404(self, client):
response = await client.put(
"/api/councils/ghost-id",
json={"name": "Ghost"},
)
assert response.status_code == 404
@pytest.mark.asyncio
async def test_delete_blueprint(self, client):
create_resp = await client.post("/api/councils/", json=SAMPLE_BLUEPRINT)
bp_id = create_resp.json()["id"]
delete_resp = await client.delete(f"/api/councils/{bp_id}")
assert delete_resp.status_code == 204
get_resp = await client.get(f"/api/councils/{bp_id}")
assert get_resp.status_code == 404
@pytest.mark.asyncio
async def test_delete_nonexistent_returns_404(self, client):
response = await client.delete("/api/councils/ghost-id")
assert response.status_code == 404
@pytest.mark.asyncio
async def test_create_rejects_missing_name(self, client):
payload = {**SAMPLE_BLUEPRINT}
del payload["name"]
response = await client.post("/api/councils/", json=payload)
assert response.status_code == 422
@pytest.mark.asyncio
async def test_create_rejects_empty_name(self, client):
payload = {**SAMPLE_BLUEPRINT, "name": ""}
response = await client.post("/api/councils/", json=payload)
assert response.status_code == 422

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"""
Tests for the blueprint CRUD service and API endpoints.
Uses an in-memory SQLite database for isolation.
"""
import sys
import os
sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
import pytest
import pytest_asyncio
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
from models.blueprint import Base, Blueprint
from services.blueprint_service import (
create_blueprint,
delete_blueprint,
get_blueprint,
list_blueprints,
update_blueprint,
)
# ---------------------------------------------------------------------------
# Test database setup (in-memory SQLite)
# ---------------------------------------------------------------------------
TEST_DATABASE_URL = "sqlite+aiosqlite:///:memory:"
test_engine = create_async_engine(TEST_DATABASE_URL, echo=False)
TestSessionLocal = async_sessionmaker(test_engine, class_=AsyncSession, expire_on_commit=False)
@pytest_asyncio.fixture
async def session():
"""Create tables and yield a fresh session for each test."""
async with test_engine.begin() as conn:
await conn.run_sync(Base.metadata.create_all)
async with TestSessionLocal() as sess:
yield sess
async with test_engine.begin() as conn:
await conn.run_sync(Base.metadata.drop_all)
# ---------------------------------------------------------------------------
# Sample data
# ---------------------------------------------------------------------------
SAMPLE_NODES = [
{
"id": "node-1",
"label": "Master",
"systemPrompt": "You are the master.",
"model": "claude-3-5-sonnet",
"tools": {"webSearch": False, "pdfReader": False},
"position": {"x": 0, "y": 0},
},
{
"id": "node-2",
"label": "Critic",
"systemPrompt": "You evaluate drafts.",
"model": "gpt-4o",
"tools": {"webSearch": True, "pdfReader": False},
"position": {"x": 300, "y": 0},
},
]
SAMPLE_EDGES = [
{"id": "edge-1", "source": "node-1", "target": "node-2", "type": "linear"},
]
# ---------------------------------------------------------------------------
# Tests
# ---------------------------------------------------------------------------
class TestBlueprintCRUD:
@pytest.mark.asyncio
async def test_create_blueprint(self, session):
bp = await create_blueprint(session, "Test Council", SAMPLE_NODES, SAMPLE_EDGES)
assert bp.id is not None
assert bp.name == "Test Council"
assert bp.version == 1
assert len(bp.nodes) == 2
assert len(bp.edges) == 1
@pytest.mark.asyncio
async def test_create_with_custom_id(self, session):
bp = await create_blueprint(
session, "Custom ID", SAMPLE_NODES, SAMPLE_EDGES, blueprint_id="my-custom-id"
)
assert bp.id == "my-custom-id"
@pytest.mark.asyncio
async def test_get_blueprint(self, session):
bp = await create_blueprint(session, "Get Test", SAMPLE_NODES, SAMPLE_EDGES)
fetched = await get_blueprint(session, bp.id)
assert fetched is not None
assert fetched.name == "Get Test"
@pytest.mark.asyncio
async def test_get_nonexistent_returns_none(self, session):
result = await get_blueprint(session, "nonexistent-id")
assert result is None
@pytest.mark.asyncio
async def test_list_blueprints(self, session):
await create_blueprint(session, "First", SAMPLE_NODES, SAMPLE_EDGES)
await create_blueprint(session, "Second", SAMPLE_NODES, SAMPLE_EDGES)
all_bps = await list_blueprints(session)
assert len(all_bps) == 2
@pytest.mark.asyncio
async def test_update_blueprint_name(self, session):
bp = await create_blueprint(session, "Original", SAMPLE_NODES, SAMPLE_EDGES)
updated = await update_blueprint(session, bp.id, name="Renamed")
assert updated is not None
assert updated.name == "Renamed"
@pytest.mark.asyncio
async def test_update_blueprint_nodes(self, session):
bp = await create_blueprint(session, "Nodes Test", SAMPLE_NODES, SAMPLE_EDGES)
new_nodes = [SAMPLE_NODES[0]] # Remove second node
updated = await update_blueprint(session, bp.id, nodes=new_nodes)
assert updated is not None
assert len(updated.nodes) == 1
@pytest.mark.asyncio
async def test_update_nonexistent_returns_none(self, session):
result = await update_blueprint(session, "ghost-id", name="New Name")
assert result is None
@pytest.mark.asyncio
async def test_delete_blueprint(self, session):
bp = await create_blueprint(session, "To Delete", SAMPLE_NODES, SAMPLE_EDGES)
deleted = await delete_blueprint(session, bp.id)
assert deleted is True
assert await get_blueprint(session, bp.id) is None
@pytest.mark.asyncio
async def test_delete_nonexistent_returns_false(self, session):
deleted = await delete_blueprint(session, "ghost-id")
assert deleted is False
@pytest.mark.asyncio
async def test_to_dict_format(self, session):
bp = await create_blueprint(session, "Dict Test", SAMPLE_NODES, SAMPLE_EDGES)
d = bp.to_dict()
assert d["id"] == bp.id
assert d["version"] == 1
assert d["name"] == "Dict Test"
assert "createdAt" in d
assert "updatedAt" in d
assert isinstance(d["nodes"], list)
assert isinstance(d["edges"], list)

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"""
Tests for the dynamic graph builder (Phase 3).
Verifies that build_graph_from_blueprint correctly creates LangGraph graphs
from JSON blueprints matching the frontend's CouncilBlueprint format.
All LLM calls are mocked.
"""
import sys
import os
sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))
import pytest
from unittest.mock import patch, MagicMock
from services.dynamic_graph_builder import (
build_graph_from_blueprint,
_make_agent_node,
_make_critic_node,
_make_conditional_router,
_is_critic_like,
_get_llm,
)
from services.graph_builder import create_initial_state
from state import CouncilState, APPROVAL_THRESHOLD, MAX_ITERATIONS
# ---------------------------------------------------------------------------
# Sample blueprints for testing
# ---------------------------------------------------------------------------
SIMPLE_LINEAR_BLUEPRINT = {
"version": 1,
"name": "Simple Linear",
"nodes": [
{
"id": "node-1",
"label": "Writer",
"systemPrompt": "You are a professional writer.",
"model": "claude-3-5-sonnet",
"tools": {"webSearch": False, "pdfReader": False},
"position": {"x": 0, "y": 0},
},
{
"id": "node-2",
"label": "Editor",
"systemPrompt": "You are a professional editor. Polish the text.",
"model": "claude-3-5-sonnet",
"tools": {"webSearch": False, "pdfReader": False},
"position": {"x": 300, "y": 0},
},
],
"edges": [
{"id": "edge-1", "source": "node-1", "target": "node-2", "type": "linear"},
],
}
CYCLIC_BLUEPRINT = {
"version": 1,
"name": "Cyclic Council",
"nodes": [
{
"id": "master",
"label": "Master Agent",
"systemPrompt": "You are the master writer.",
"model": "claude-3-5-sonnet",
"tools": {"webSearch": False, "pdfReader": False},
"position": {"x": 0, "y": 0},
},
{
"id": "critic",
"label": "Critic Agent",
"systemPrompt": "You are the critic. Evaluate and score the draft.",
"model": "claude-3-5-sonnet",
"tools": {"webSearch": False, "pdfReader": False},
"position": {"x": 300, "y": 0},
},
{
"id": "writer",
"label": "Final Writer",
"systemPrompt": "You polish approved drafts.",
"model": "claude-3-5-sonnet",
"tools": {"webSearch": False, "pdfReader": False},
"position": {"x": 600, "y": 0},
},
],
"edges": [
{"id": "e1", "source": "master", "target": "critic", "type": "linear"},
{
"id": "e2",
"source": "critic",
"target": "master",
"type": "conditional",
"condition": "rework",
},
{
"id": "e3",
"source": "critic",
"target": "writer",
"type": "conditional",
"condition": "approve",
},
],
}
# ---------------------------------------------------------------------------
# Test: critic detection heuristic
# ---------------------------------------------------------------------------
class TestCriticDetection:
def test_detects_critic_keyword(self):
assert _is_critic_like("You are the critic. Evaluate drafts.") is True
def test_detects_evaluate_keyword(self):
assert _is_critic_like("Your role is to evaluate and score.") is True
def test_detects_review_keyword(self):
assert _is_critic_like("Review the document for quality.") is True
def test_no_match_for_writer(self):
assert _is_critic_like("You are a professional writer.") is False
def test_case_insensitive(self):
assert _is_critic_like("You are the CRITIC agent.") is True
# ---------------------------------------------------------------------------
# Test: conditional routing
# ---------------------------------------------------------------------------
class TestConditionalRouter:
def test_routes_to_correct_target(self):
edges = [
{"target": "node-a", "condition": "rework"},
{"target": "node-b", "condition": "approve"},
]
router = _make_conditional_router("source", edges, None)
state = create_initial_state("topic", "run-1")
state["route_decision"] = "approve"
assert router(state) == "node-b"
def test_routes_rework(self):
edges = [
{"target": "node-a", "condition": "rework"},
{"target": "node-b", "condition": "approve"},
]
router = _make_conditional_router("source", edges, None)
state = create_initial_state("topic", "run-1")
state["route_decision"] = "rework"
assert router(state) == "node-a"
def test_unknown_decision_uses_linear_fallback(self):
edges = [
{"target": "node-a", "condition": "rework"},
]
router = _make_conditional_router("source", edges, "fallback-node")
state = create_initial_state("topic", "run-1")
state["route_decision"] = "unknown"
assert router(state) == "fallback-node"
def test_unknown_decision_uses_first_conditional_as_fallback(self):
edges = [
{"target": "node-a", "condition": "rework"},
{"target": "node-b", "condition": "approve"},
]
router = _make_conditional_router("source", edges, None)
state = create_initial_state("topic", "run-1")
state["route_decision"] = "unknown"
assert router(state) == "node-a"
# ---------------------------------------------------------------------------
# Test: agent node factory
# ---------------------------------------------------------------------------
class TestAgentNodeFactory:
def test_agent_node_returns_draft(self):
mock_response = MagicMock()
mock_response.content = "Generated content about AI."
with patch("services.dynamic_graph_builder.ChatAnthropic") as MockLLM:
MockLLM.return_value.invoke.return_value = mock_response
node_fn = _make_agent_node("node-1", "Writer", "You write.", "claude-3-5-sonnet")
state = create_initial_state("AI basics", "run-1")
result = node_fn(state)
assert result["current_draft"] == "Generated content about AI."
assert result["active_node"] == "node-1"
assert result["iteration_count"] == 1
def test_agent_node_with_existing_draft_and_feedback(self):
mock_response = MagicMock()
mock_response.content = "Improved draft."
with patch("services.dynamic_graph_builder.ChatAnthropic") as MockLLM:
MockLLM.return_value.invoke.return_value = mock_response
node_fn = _make_agent_node("node-1", "Writer", "You write.", "claude-3-5-sonnet")
state = create_initial_state("AI", "run-1")
state["current_draft"] = "First draft"
state["feedback_history"] = ["Needs more detail"]
state["iteration_count"] = 1
result = node_fn(state)
assert result["current_draft"] == "Improved draft."
assert result["iteration_count"] == 2
# ---------------------------------------------------------------------------
# Test: critic node factory
# ---------------------------------------------------------------------------
class TestCriticNodeFactory:
def test_critic_node_approves_high_score(self):
mock_response = MagicMock()
mock_response.content = "SCORE: 9\nVERDICT: approve\nFEEDBACK:\nExcellent work."
with patch("services.dynamic_graph_builder.ChatAnthropic") as MockLLM:
MockLLM.return_value.invoke.return_value = mock_response
node_fn = _make_critic_node("critic-1", "Critic", "You evaluate.", "claude-3-5-sonnet")
state = create_initial_state("Topic", "run-1")
state["current_draft"] = "A great draft"
result = node_fn(state)
assert result["route_decision"] == "approve"
assert result["critic_score"] == 9.0
def test_critic_node_reworks_low_score(self):
mock_response = MagicMock()
mock_response.content = "SCORE: 4\nVERDICT: rework\nFEEDBACK:\nNeeds more structure."
with patch("services.dynamic_graph_builder.ChatAnthropic") as MockLLM:
MockLLM.return_value.invoke.return_value = mock_response
node_fn = _make_critic_node("critic-1", "Critic", "You evaluate.", "claude-3-5-sonnet")
state = create_initial_state("Topic", "run-1")
state["current_draft"] = "Draft"
result = node_fn(state)
assert result["route_decision"] == "rework"
assert result["critic_score"] == 4.0
assert len(result["feedback_history"]) == 1
assert "structure" in result["feedback_history"][0]
def test_critic_safety_valve_at_max_iterations(self):
node_fn = _make_critic_node("critic-1", "Critic", "Evaluate.", "claude-3-5-sonnet")
state = create_initial_state("Topic", "run-1")
state["current_draft"] = "Draft"
state["iteration_count"] = MAX_ITERATIONS
result = node_fn(state)
assert result["route_decision"] == "approve"
assert result["critic_score"] == APPROVAL_THRESHOLD
# ---------------------------------------------------------------------------
# Test: build_graph_from_blueprint
# ---------------------------------------------------------------------------
class TestBuildGraphFromBlueprint:
def test_rejects_empty_blueprint(self):
with pytest.raises(ValueError, match="no nodes"):
build_graph_from_blueprint({"version": 1, "name": "Empty", "nodes": [], "edges": []})
def test_builds_linear_graph(self):
"""A simple linear blueprint should compile without error."""
graph = build_graph_from_blueprint(SIMPLE_LINEAR_BLUEPRINT)
assert graph is not None
def test_builds_cyclic_graph(self):
"""A cyclic blueprint with conditional edges should compile."""
graph = build_graph_from_blueprint(CYCLIC_BLUEPRINT)
assert graph is not None
def test_entry_point_is_node_with_no_incoming(self):
"""The entry point should be the node that has no incoming edges."""
# In CYCLIC_BLUEPRINT, 'master' has no incoming edges except from critic (conditional rework),
# but critic->master is an edge so master IS a target. The first node without incoming = master
# Actually master IS a target of the rework edge. Let's verify with simple linear.
graph = build_graph_from_blueprint(SIMPLE_LINEAR_BLUEPRINT)
assert graph is not None # node-1 has no incoming, so it's the entry
def test_single_node_blueprint(self):
"""A single node with no edges should work (trivial graph)."""
bp = {
"version": 1,
"name": "Single",
"nodes": [
{
"id": "only-node",
"label": "Solo Agent",
"systemPrompt": "You work alone.",
"model": "claude-3-5-sonnet",
"tools": {"webSearch": False, "pdfReader": False},
"position": {"x": 0, "y": 0},
}
],
"edges": [],
}
graph = build_graph_from_blueprint(bp)
assert graph is not None
# ---------------------------------------------------------------------------
# Test: model lookup
# ---------------------------------------------------------------------------
class TestModelLookup:
def test_unknown_model_raises(self):
with pytest.raises(ValueError, match="Unknown model"):
_get_llm("nonexistent-model")
def test_claude_model_creates_instance(self):
with patch("services.dynamic_graph_builder.ChatAnthropic") as MockLLM:
llm = _get_llm("claude-3-5-sonnet")
MockLLM.assert_called_once()
def test_gpt4o_model_creates_instance(self):
with patch("services.dynamic_graph_builder.ChatOpenAI") as MockLLM:
llm = _get_llm("gpt-4o")
MockLLM.assert_called_once()