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systemprompt-extension

Compile-time extension framework for systemprompt.io AI governance infrastructure. Built on the inventory crate — registers schemas, API routes, jobs, and providers in the MCP governance pipeline. Extensions can add new routes, services, and capabilities to the platform.

Layer: Shared — foundational types/traits with no dependencies on other layers. Part of the systemprompt-core workspace.

Overview

Provides the infrastructure for building and loading systemprompt.io extensions. Extensions can add new routes, services, and capabilities to the platform.

Architecture

• ExtensionContext — Runtime context for extensions
• ExtensionError — Error types for extension operations
• ExtensionLoader — Registration and loading system

Usage

[dependencies]
systemprompt-extension = "0.2.1"

use systemprompt_extension::prelude::*;

struct MyExtension;

impl Extension for MyExtension {
    fn id(&self) -> &str { "my-extension" }
    fn name(&self) -> &str { "My Extension" }
    fn version(&self) -> &str { "1.0.0" }
}

register_extension!(MyExtension);

use systemprompt_extension::{Extension, ExtensionMetadata, ExtensionRole};

pub struct MyExtension;

impl Extension for MyExtension {
    fn metadata(&self) -> ExtensionMetadata {
        ExtensionMetadata {
            name: "my-extension".into(),
            version: "0.1.0".into(),
            role: ExtensionRole::Domain,
            ..Default::default()
        }
    }
}

Feature Flags

Dependencies

• async-trait — Async trait support
• axum — Router types (optional, with web feature)
• inventory — Compile-time extension registration
• reqwest — HTTP client (optional, with web feature)

License

BSL-1.1 (Business Source License). Source-available for evaluation, testing, and non-production use. Production use requires a commercial license. Each version converts to Apache 2.0 four years after publication. See LICENSE.

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