# ProofRail

## Docs

- [Audit receipts](https://docs.proofrail.dev/concepts/audit-receipts.md): Tamper-evident records of every chain, verifiable offline
- [Chain-level governance](https://docs.proofrail.dev/concepts/chain-level-governance.md): Why governing whole agent workflows matters more than governing individual tool calls
- [Policies](https://docs.proofrail.dev/concepts/policies.md): How ProofRail decides what to allow, flag, or block
- [CrewAI](https://docs.proofrail.dev/frameworks/crewai.md): Govern CrewAI workflows with task-level instrumentation
- [LangChain](https://docs.proofrail.dev/frameworks/langchain.md): Govern LangChain agents and tool executors with one wrap
- [LangGraph](https://docs.proofrail.dev/frameworks/langgraph.md): Govern compiled LangGraph workflows with one line
- [MCP](https://docs.proofrail.dev/frameworks/mcp.md): Govern MCP server tool calls before they execute
- [Cost tracking](https://docs.proofrail.dev/guides/cost-tracking.md): Track LLM spend per chain, per agent, per model — with budget alerts
- [Human approval](https://docs.proofrail.dev/guides/human-approval.md): How approval gates work end-to-end, from trigger to resolution
- [Kill switch](https://docs.proofrail.dev/guides/kill-switch.md): Halt all agent activity in your organization, immediately
- [Installation](https://docs.proofrail.dev/installation.md): Install the ProofRail SDK and the framework adapters you need
- [Introduction](https://docs.proofrail.dev/introduction.md): Governance for AI agent workflows
- [Limitations](https://docs.proofrail.dev/limitations.md): What ProofRail does and does not do at the current version
- [Quickstart](https://docs.proofrail.dev/quickstart.md): From install to your first governed chain in under 10 minutes
- [Configuration](https://docs.proofrail.dev/reference/configuration.md): Every init() option, explained with examples and rationale
- [Exceptions](https://docs.proofrail.dev/reference/exceptions.md): Every exception type the SDK raises, with attributes and handling patterns
- [SDK API](https://docs.proofrail.dev/reference/sdk-api.md): Complete reference for every public function, class, and method in the ProofRail SDK