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systemprompt-loader

File loading infrastructure for SystemPrompt. This crate provides pure I/O operations for loading configuration files, profiles, secrets, extensions, and module definitions without any domain logic.

Architecture

The loader crate sits in the infrastructure layer and depends only on systemprompt-models (shared layer). It separates file I/O concerns from business logic, enabling:

Testable file operations with clear boundaries
Reusable loaders across different entry points (API, TUI, CLI)
Consistent configuration parsing and validation

File Structure

src/
├── lib.rs                       # Public API exports
├── config_loader.rs             # Basic services configuration loader
├── config_writer.rs             # Agent configuration file writer
├── enhanced_config_loader.rs    # Extended config loader with includes
├── extension_loader.rs          # Extension manifest discovery and loading
├── extension_registry.rs        # Runtime extension binary registry
├── include_resolver.rs          # YAML !include directive resolver
├── module_loader.rs             # Module definition aggregator
├── profile_loader.rs            # Profile YAML loader with validation
├── secrets_loader.rs            # Secrets file loader with path resolution
└── modules/
    ├── mod.rs                   # Module collection aggregator
    ├── agent.rs                 # Agent module definition
    ├── ai.rs                    # AI service module definition
    ├── analytics.rs             # Analytics module definition
    ├── api.rs                   # API gateway module definition
    ├── content.rs               # Content management module definition
    ├── database.rs              # Database module definition
    ├── files.rs                 # File management module definition
    ├── log.rs                   # Logging module definition
    ├── mcp.rs                   # MCP service module definition
    ├── oauth.rs                 # OAuth module definition
    ├── scheduler.rs             # Scheduler module definition
    └── users.rs                 # Users module definition

Module Overview

Core Loaders

Module	Purpose
`ProfileLoader`	Loads and validates profile YAML files from the profiles directory
`SecretsLoader`	Loads secrets files with support for `~/` home directory expansion
`ConfigLoader`	Loads services configuration with include file merging
`EnhancedConfigLoader`	Extended config loader with agent discovery and include resolution
`ModuleLoader`	Aggregates all module definitions for database schema management

Extension Support

Module	Purpose
`ExtensionLoader`	Discovers extensions by scanning for `manifest.yaml` files
`ExtensionRegistry`	Runtime registry mapping binary names to extension metadata
`IncludeResolver`	Resolves `!include` directives in YAML configuration
`ConfigWriter`	Creates, updates, and deletes agent configuration files

Module Definitions

The modules/ directory contains definitions for each SystemPrompt module. Each definition specifies:

Module metadata (name, version, description)
Database schemas with required columns
Seed data for initial setup
API configuration
Module dependencies and load order (weight)

Usage

use systemprompt_loader::{
    ConfigLoader, ProfileLoader, SecretsLoader,
    ExtensionLoader, ExtensionRegistry, ModuleLoader,
};

let config = ConfigLoader::load()?;

let profile = ProfileLoader::load_and_validate(services_path, "development")?;

let secrets = SecretsLoader::resolve_and_load("~/.config/secrets.yaml", None)?;

let modules = ModuleLoader::all();

let extensions = ExtensionLoader::discover(project_root);

Dependencies

anyhow - Error handling
thiserror - Error type definitions
serde / serde_yaml / serde_json - Serialization
tokio - Async runtime
tracing - Logging
systemprompt-models - Shared model types

systemprompt-loader 0.0.1