Module mcp 

MCP client management built on top of the Codex MCP building blocks.

This module adapts the reference MCP client, server and type definitions from https://github.com/openai/codex to integrate them with VT Code’s multi-provider configuration model. The original implementation inside this project had grown organically and mixed a large amount of bookkeeping logic with the lower level rmcp client transport. The rewritten version keeps the VT Code specific surface (allow lists, tool indexing, status reporting) but delegates the actual protocol interaction to a lightweight RmcpClient adapter that mirrors Codex’ mcp-client crate. This dramatically reduces the amount of bespoke glue we have to maintain while aligning the behaviour with the upstream MCP implementations.

Re-exports

pub use connection_pool::ConnectionPoolStats;

pub use connection_pool::McpConnectionPool;

pub use connection_pool::McpPoolError;

pub use connection_pool::PooledMcpManager;

pub use connection_pool::PooledMcpStats;

pub use errors::ErrorCode;

pub use errors::McpResult;

pub use errors::configuration_error;

pub use errors::initialization_timeout;

pub use errors::provider_not_found;

pub use errors::provider_unavailable;

pub use errors::schema_invalid;

pub use errors::tool_invocation_failed;

pub use errors::tool_not_found;

pub use rmcp_transport::HttpTransport;

pub use rmcp_transport::create_http_transport;

pub use rmcp_transport::create_stdio_transport;

pub use rmcp_transport::create_stdio_transport_with_stderr;

pub use schema::validate_against_schema;

pub use schema::validate_tool_input;

pub use tool_discovery::DetailLevel;

pub use tool_discovery::ToolDiscovery;

pub use tool_discovery::ToolDiscoveryResult;

pub use traits::McpElicitationHandler;

pub use traits::McpToolExecutor;

pub use types::FileParamSchemaEntry;

pub use types::FileUploadResult;

pub use types::McpClientStatus;

pub use types::McpElicitationRequest;

pub use types::McpElicitationResponse;

pub use types::McpPromptDetail;

pub use types::McpPromptInfo;

pub use types::McpResourceData;

pub use types::McpResourceInfo;

pub use types::McpToolInfo;

pub use types::OPENAI_FILE_PARAMS_META_KEY;

pub use types::OPENAI_FILE_PARAMS_VALUE;

pub use types::ProvidedFilePayload;

pub use utils::LOCAL_TIMEZONE_ENV_VAR;

pub use utils::TIMEZONE_ARGUMENT;

pub use utils::TZ_ENV_VAR;

pub use utils::build_headers;

pub use utils::detect_local_timezone;

pub use utils::ensure_timezone_argument;

pub use utils::schema_requires_field;

Modules

cli

CLI commands for managing Model Context Protocol providers.

connection_pool

MCP connection pool for efficient provider management

enhanced_config

Enhanced MCP Configuration

errors

rmcp_transport

schema

tool_discovery

Tool discovery and search functionality for MCP tools.

tool_discovery_cache

Tool discovery caching system for MCP to avoid redundant tool searches

traits

MCP trait abstractions for tool execution and elicitation handling.

types

Core MCP data types for tool, resource, and prompt information.

utils

Utility functions for MCP client operations.

Structs

McpClient

McpProvider

Enums

ElicitationAction

Represents the possible actions a user can take in response to an elicitation request.

Constants

LATEST_PROTOCOL_VERSION

MCP protocol version constants

SUPPORTED_PROTOCOL_VERSIONS

Functions

validate_mcp_config

Validate MCP configuration settings