lab-03-mock-bedrock-client

Mock Bedrock Client

README

# lab-03-mock-bedrock-client

Mock Bedrock client for deterministic tests.

## Run

```bash
uv run python src/agent.py
```

## Test

```bash
uv run pytest tests/
```

## AWS

Local only — no AWS account.

pyproject.toml

[project]
name = "lab-03-mock-bedrock-client"
version = "0.1.0"
requires-python = ">=3.11"
dependencies = [
  "langgraph>=0.4.0",
  "langchain-core>=0.3.0",
]

[project.optional-dependencies]
dev = ["pytest>=8.0"]

[tool.uv]
dev-dependencies = []

Starter Python

"""Lab 3 starter — implement the graph in build_graph()."""

from typing import TypedDict

from langgraph.graph import END, START, StateGraph


class AgentState(TypedDict, total=False):
    messages: list[str]
    route: str


def build_graph():
    g = StateGraph(AgentState)

    def planner(state: AgentState) -> AgentState:
        return {"route": "worker", "messages": state.get("messages", []) + ["planned"]}

    def worker(state: AgentState) -> AgentState:
        return {"messages": state.get("messages", []) + ["worked"]}

    g.add_node("planner", planner)
    g.add_node("worker", worker)
    g.add_edge(START, "planner")
    g.add_edge("planner", "worker")
    g.add_edge("worker", END)
    return g.compile()


if __name__ == "__main__":
    app = build_graph()
    out = app.invoke({"messages": ["hello"]})
    print(out)