# reagent-flow

## Docs

- [Anthropic](https://reagent-ai.mintlify.app/adapters/anthropic.md): Auto-capture tool calls and results from the Anthropic Python SDK.
- [CrewAI](https://reagent-ai.mintlify.app/adapters/crewai.md): Auto-capture tool calls and results from CrewAI crews.
- [LangChain](https://reagent-ai.mintlify.app/adapters/langchain.md): Auto-capture tool calls and results using the LangChain callback handler.
- [LangGraph](https://reagent-ai.mintlify.app/adapters/langgraph.md): Auto-capture tool calls and results from LangGraph agents with graph node tracking.
- [OpenAI](https://reagent-ai.mintlify.app/adapters/openai.md): Auto-capture tool calls and results from the OpenAI Python SDK.
- [Agent Stack Traces](https://reagent-ai.mintlify.app/advanced/agent-stack-traces.md): Readable failure diagnostics showing the full tool-calling history.
- [Async Support](https://reagent-ai.mintlify.app/advanced/async-support.md): Use reagent-flow sessions with async/await.
- [CI](https://reagent-ai.mintlify.app/advanced/ci.md): Run reagent-flow contract tests in CI without live LLM calls.
- [Nested Schemas](https://reagent-ai.mintlify.app/advanced/nested-schemas.md): Validate nested dicts, typed lists, union types, and Pydantic models.
- [pytest Plugin](https://reagent-ai.mintlify.app/advanced/pytest-plugin.md): CLI flags, fixtures, and markers for integrating reagent-flow into your test suite.
- [Flow and Count Assertions](https://reagent-ai.mintlify.app/assertions/flow-and-count.md): Assert on tool-calling order, sequences, counts, and arguments.
- [Golden Baselines](https://reagent-ai.mintlify.app/assertions/golden-baselines.md): Snapshot-test known-good agent behavior and detect regressions.
- [Handoff Contracts](https://reagent-ai.mintlify.app/assertions/handoff-contracts.md): Validate the data shape and integrity of handoffs between agents.
- [Token and Cost Guards](https://reagent-ai.mintlify.app/assertions/token-and-cost-guards.md): Guard against runaway token usage or unexpected costs.
- [Tool Output Contracts](https://reagent-ai.mintlify.app/assertions/tool-output-contracts.md): Validate the shape of tool return values to catch upstream API drift.
- [Contract Testing](https://reagent-ai.mintlify.app/concepts/contract-testing.md): How reagent-flow treats every agent handoff as a typed contract.
- [Sessions and Traces](https://reagent-ai.mintlify.app/concepts/sessions-and-traces.md): How reagent-flow records agent behavior into structured, assertable traces.
- [Why Contract Testing?](https://reagent-ai.mintlify.app/concepts/why-contract-testing.md): How reagent-flow differs from structured outputs, runtime guardrails, evals, and observability.
- [Vendor Onboarding Showcase](https://reagent-ai.mintlify.app/examples/vendor-onboarding.md): A multi-agent approval workflow where reagent-flow blocks a broken handoff before a risky vendor is approved.
- [Installation](https://reagent-ai.mintlify.app/installation.md): Install reagent-flow and choose the adapter path that fits your stack.
- [Introduction](https://reagent-ai.mintlify.app/introduction.md): Contract testing for multi-agent handoffs. pytest-native assertions that catch schema drift, broken handoffs, and tool-output regressions before they ship.
- [Quickstart](https://reagent-ai.mintlify.app/quickstart.md): Install reagent-flow and write your first contract test in under 5 minutes.