Crate systemprompt_templates 

systemprompt-templates

Template registry, loading, and rendering for systemprompt.io. The crate exposes:

• TemplateRegistry — Handlebars-backed engine with multi-source template discovery, partial registration, and stat reporting. Registers a json helper for emitting values inside JSON contexts (e.g. JSON-LD <script> blocks): {{{json field}}} serialises via serde_json::to_string, which correctly escapes backslashes, newlines, and control characters that Handlebars’ default HTML escaping leaves intact.
• TemplateRegistryBuilder — fluent builder that wires together loaders, providers, and partial sources.
• CoreTemplateProvider — filesystem provider scanning a directory for .html templates plus an optional templates.yaml manifest.
• EmbeddedDefaultsProvider — bundles the in-tree defaults/ templates so consumers get a usable engine without touching disk.
• Re-exports of the systemprompt-template-provider traits the engine composes against.

Feature flags

Feature	Default	Effect
none	n/a	The crate exposes a single feature surface; all modules are compiled unconditionally. The [package.metadata.docs.rs] all-features = true setting is retained so future feature additions automatically appear in published docs.

Layering

systemprompt-templates is a domain crate whose only systemprompt dependency is the systemprompt-template-provider shared crate.

Re-exports

pub use error::TemplateError;

pub use error::TemplateResult;

Modules

error

Typed error surface for the templates crate.

Structs

ComponentContext

CoreTemplateProvider

EmbeddedDefaultsProvider

EmbeddedLoader

ExtendedData

ExtenderContext

FileSystemLoader

PageContext

RegistryStats

RenderedComponent

TemplateDefinition

TemplateRegistry

TemplateRegistryBuilder

Enums

TemplateSource

Traits

ComponentRenderer

PageDataProvider

TemplateDataExtender

TemplateLoader

#[async_trait] is required: this trait is consumed as Arc<dyn TemplateLoader> (see DynTemplateLoader), so it must be dyn-compatible — native async fn in traits is not.

TemplateProvider

Type Aliases

DynComponentRenderer

DynPageDataProvider

DynTemplateDataExtender

DynTemplateLoader

DynTemplateProvider