SDK Usage
This guide is the entry point for building an extension package on top of
mpt-extension-sdk. Topic-specific examples live in smaller documents under
sdk_usage/.
Usage Topics
- Application setup: install the SDK, shape an
extension package, create
ExtensionApp, include routers, and configure the runtime. - Event routes: register task and non-task event handlers (and the status of schedule routes).
- Authenticated API routes: expose authenticated endpoints, validate bodies, read request/auth context, return API responses, and use pagination.
- UI plugs: register
PlugRouterproviders, group plugs under nested navigation containers, and reference static assets. - Contexts and pipelines: adapt execution contexts, compose pipelines, drive the step lifecycle and flow control, use pipeline hooks, and declare status transitions.
- Immutable snapshots: treat MPT models as
immutable, update parameters with the
with_*helpers, and refresh after a write. - Error handling: raise typed step/pipeline errors and let the SDK map them to event responses.
- Settings: the runtime, extension, and account settings layers and the environment-variable helpers.
- Observability: SDK tracing, the
azure-monitorextra, and extension-defined spans withtrace_span. - CLI and metadata: the
mpt-extcommands andmeta.yamlgeneration/validation. - Marketplace services: use
ctx.mpt_api_servicefrom handlers and pipeline steps.
Runtime Commands
Use the mpt-ext CLI command when running an extension built on top of the SDK:
mpt-ext run --local
mpt-ext run
mpt-ext meta generate
mpt-ext meta validate
mpt-ext run --localstarts the localFastAPI + uvicornruntime.mpt-ext runwritesmeta.yaml, registers the extension instance, and starts the platform runtime withmrok/ziticorn.mpt-ext meta generatewrites metadata derived fromext_app.to_meta_config().mpt-ext meta validatecompares the checked-inmeta.yamlwith generated metadata, validates plug static assets, and writesmeta.generated.yamlwhen validation fails.
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