Crate trip_test 

trip-test — Contract testing & regression safety for MCP servers

This library provides the core functionality for testing Model Context Protocol (MCP) server contracts. It allows you to:

• Connect to MCP servers and enumerate their tools
• Record baseline snapshots of tool schemas and exchanges
• Replay snapshots to detect regressions
• Compare contracts and classify breaking changes

Architecture

The crate is organized into modules:

• mcp: MCP protocol client (stdio transport)
• snapshot: Snapshot file format and I/O
• diff: Contract diffing and change classification
• config: Configuration file parsing (TOML)
• logger: Logging and verbosity control

Re-exports

pub use mcp::MCPClient;

pub use mcp::Tool;

pub use snapshot::Snapshot;

pub use snapshot::SnapshotMeta;

pub use snapshot::ToolInfo;

pub use snapshot::Exchange;

pub use snapshot::ExchangeResult;

pub use diff::DiffReport;

pub use diff::ToolChange;

pub use diff::ChangeClass;

pub use config::TripTestConfig;

Modules

config

Configuration file parsing (TOML format).

diff

Contract diffing and change classification.

logger

Logging utilities with verbosity control.

mcp

MCP protocol client implementation.

snapshot

Snapshot file format and I/O.