everruns-core 0.42.0

Transport-neutral agent execution contracts for Everruns
Documentation

everruns-core

Core agent abstractions for the Everruns durable agentic harness engine.

Crates.io Documentation License: MIT

everruns-core supplies portable execution contracts and optional runtime modules for the Everruns ecosystem. Its default feature set is empty and builds for wasm32-unknown-unknown without network, filesystem, process, telemetry-exporter, or database dependencies. Control-plane records belong to the server; concrete provider drivers belong to everruns-drivers.

Quick Example

use everruns_core::CapabilityRegistry;
use everruns_contracts::DriverRegistry;

let capabilities = CapabilityRegistry::new();
let drivers = DriverRegistry::new();
assert!(capabilities.is_empty());
assert!(drivers.registered_providers().is_empty());

Features

Feature Public module Purpose
agent-package agent_package Authored formats, ZIP, virtual folders and semantic diffs
agent-package-fs agent_package Native disk loading and export
engine engine Portable Input/Reason/Act algorithms and turn planning
builtins builtins First-party policies over injected execution contracts
host host Host composition, stores, filesystem and runtime orchestration
mcp mcp MCP protocol, authentication and injected-transport adaptation
ag-ui ag_ui AG-UI wire types and conformance validation
ag-ui-projection ag_ui Canonical runtime-event projection
ag-ui-client ag_ui::client Optional outbound AG-UI HTTP client
a2a a2a Optional outbound A2A discovery and client construction

Host networking, processes, containment and exporters have separate opt-ins: direct-egress, process, native-containment, host-shell, openai-agents-api, otel, and braintrust. mcp-stdio enables local-process MCP. openapi, tree-sitter-outlines, and ui-capabilities select their respective schema, structural-outline, and UI catalog surfaces.

Custom hosts inject host::HostComposition and host::HostBackends. Applications use everruns; its batteries module selects the default policy catalog and enabled environment integrations. The core host never selects concrete vendor drivers or depends on integration crates.

The deprecated everruns-engine, everruns-host, everruns-builtins, everruns-mcp, and everruns-ag-ui crates forward to these modules for one release. Migrate imports and features to everruns-core before their removal.

The Framework exposes portable definitions through everruns::AgentPackage. See the file-based agent guide.

Documentation

License

Licensed under the MIT License.