Record/replay testing for LLM agents.

Why Agentape?

Depending on live LLM APIs for testing is slow, expensive, and flaky. Agentape solves this by recording your interactions once and replaying them instantly.

• 💸 Save Money: Eliminate API costs during development and CI/CD.
• ⚡ Instant Feedback: Tests run in milliseconds, not seconds.
• 🛡️ Determinism: Flaky LLM outputs won't break your logic tests.
• 🔒 Offline Capable: Code on a plane or train without internet access.

Use Cases

• Regression Testing: Ensure your tool usage and parsing logic works without hitting real endpoints.
• CI/CD Pipelines: Run unittests on every commit without worrying about rate limits or bills.
• Showcase Demos: commit "golden path" tapes to ensure your examples always work for new users.
• Debugging: Capture a specific conversation state and replay it reliably to fix downstream bugs.

Installation

pip install agentape

Quick Start

import agentape
from openai import OpenAI

# Wrap the client
client = agentape.wrap(OpenAI())

# Record interactions
with agentape.record("tapes/my_flow.yaml"):
    response = client.chat.completions.create(
        model="gpt-4o",
        messages=[{"role": "user", "content": "Hello"}]
    )

# Replay interactions (no API calls made)
with agentape.replay("tapes/my_flow.yaml"):
    response = client.chat.completions.create(
        model="gpt-4o",
        messages=[{"role": "user", "content": "Hello"}]
    )

pytest Integration

import agentape

@agentape.use_tape("tapes/{test_name}.yaml")
def test_my_feature(openai_client):
    response = openai_client.chat.completions.create(
        model="gpt-4o",
        messages=[{"role": "user", "content": "Hello"}]
    )
    assert "hello" in response.choices[0].message.content.lower()

Run tests with:

pytest tests/ --tape-mode=record   # Record new tapes
pytest tests/ --tape-mode=replay   # Replay existing (default)
pytest tests/ --tape-mode=off      # Pass-through, no taping

License

MIT