everruns-builtins

Portable policy capabilities for the Everruns Framework.

This crate owns the backend-neutral implementations that shape agent behavior, including human-intent signaling, infinity context, skills, context compaction, tool search, budgeting, loop and progress guards, prompt caching, tool-call repair, output handling, and guardrails. Linking the crate does not register anything: applications choose a registry and call a registration function explicitly. Registration rejects ID or alias collisions atomically, leaving the caller's registry unchanged on error.

Part of the Everruns ecosystem, the durable agentic harness engine for building unstoppable agents.

Quick Example

use everruns_builtins::register_portable_capabilities;
use everruns_core::CapabilityRegistry;

let mut registry = CapabilityRegistry::new();
register_portable_capabilities(&mut registry)?;

# Ok::<(), everruns_capability::CapabilityError>(())

The bundle contains policy, not environment integrations. It does not own a network client, process runner, interpreter, database, server, or hosted service. Capabilities that persist or distill tool output declare a dependency on session_file_system; the embedding application must compose a compatible filesystem implementation when enabling those capabilities. usage_limit_auto_continue similarly requires the host's session-schedule service; register_runtime_capabilities omits it for embedded runtimes that do not provide that service.

Use the everruns facade for the normal Framework API. Depend on this crate directly when building a custom capability registry or a minimal host.

What It Provides

• Explicit runtime-safe and full-product registration functions
• Human intent, infinity context, skills, compaction, tool search, and guard policies
• Tool-call repair and output persistence/distillation policy hooks
• Registry-skill attachment and optional OpenUI/A2UI prompt capabilities
• Public typed configuration values re-exported by the everruns facade
• Atomic capability-ID and alias collision rejection

The ui-capabilities feature enables the OpenUI and A2UI implementations and their catalog/prompt modules at everruns_builtins::{openui,a2ui}. It is selected by the hosted product catalog; the embedded runtime bundle remains UI-protocol neutral.

Documentation

• API reference (docs.rs)
• Framework advanced capabilities
• Everruns documentation

License

Licensed under the MIT License.