ethisyscore-plugin-sdk 1.4.0

EthisysCore Plugin SDK for Python — build container-hosted plugins

EthisysCore Python Plugin SDK

ethisyscore-plugin-sdk — Build container-mode plugins with Python 3.11+.

Container plugins run as isolated Docker containers with Dapr sidecars, communicating with the EthisysCore platform via HTTP. Built on FastAPI and Pydantic.

Installation

pip install ethisyscore-plugin-sdk

Quick Start

from ethisyscore_plugin_sdk import (
    PluginBase, PluginHost, PluginManifest, McpToolDefinition,
    ToolResult, PluginContext,
)

class GreeterPlugin(PluginBase):
    @property
    def manifest(self) -> PluginManifest:
        return PluginManifest(
            id="11111111-1111-1111-1111-111111111111",
            name="Greeter Plugin",
            version="1.0.0",
            type="TENANT_APP",
            owner="acme-corp",
            compatible_core_version=">=1.0.0",
            mcp_version="1.0",
            execution_mode="Container",
            mcp_tools=[
                McpToolDefinition(
                    name="greet",
                    description="Say hello",
                    input_schema_json='{"type":"object","properties":{"name":{"type":"string"}},"required":["name"]}'
                )
            ],
        )

    async def on_invoke_tool(self, tool_name: str, args: dict, context: PluginContext) -> ToolResult:
        if tool_name == "greet":
            name = args.get("name", "World")
            return ToolResult(success=True, result_json=f'{{"greeting": "Hello, {name}!"}}')
        return ToolResult(success=False, error=f"Unknown tool: {tool_name}")

if __name__ == "__main__":
    PluginHost(GreeterPlugin()).start()

PluginManifest.id, dependency feature_id, and runtime identity fields (extension_id, organisation_id, tenant_id) are UUID strings. UI contribution IDs remain regular logical strings.

Lifecycle Hooks

All hooks are optional — override only what you need:

async def on_initialize(self, context: PluginContext) -> None     # After platform connects
async def on_enable(self, context: PluginContext) -> None         # Extension enabled for tenant
async def on_disable(self, context: PluginContext) -> None        # Extension disabled
async def on_get_resource(self, uri: str, context: PluginContext) -> ResourceResult
async def on_check_health(self) -> HealthResult                   # Health probe

Platform Services

Available through PluginContext:

# Key-value persistence (per plugin per tenant)
count = (await context.data_store.get("counter")) or 0
await context.data_store.set("counter", count + 1)

# Structured logging (synchronous — no await needed)
context.logger.info("Processing request")
context.logger.error("Something failed")

# Invoke tools from other plugins
result = await context.mcp_client.invoke_tool("other-tool", '{"key": "value"}')

# Publish domain events
await context.publish_event("ItemCreated", {"id": "123"})

Reference Data

Container plugins can consume host-provided reference data through context.reference_data:

employees = await context.reference_data.list("hr", "employees")
employee = await context.reference_data.get("hr", "employees", "e-123")

Type Safety

Protocol-based typing for IDE autocompletion:

• PluginDataStoreProtocol — get(), set(), delete(), exists(), list_keys(), query()
• PluginLoggerProtocol — info(), warning(), error(), debug()
• McpClientProtocol — invoke_tool(tool_name, arguments_json), list_tools(), get_resource(), list_resources()

Manifest fields accept both snake_case and camelCase (Pydantic populate_by_name).

HTTP Endpoints

PluginHost starts a Uvicorn/FastAPI server (port: DAPR_APP_PORT or 8080):

Endpoint	Method	Purpose
/plugin/initialize	POST	Platform connects, provides context
/plugin/enable	POST	Extension enabled for tenant
/plugin/disable	POST	Extension disabled
/plugin/invoke-tool	POST	MCP tool invocation
/plugin/get-resource	POST	MCP resource read
/plugin/health	GET	Health probe
/plugin/heartbeat	GET	Liveness check

Environment Variables

Variable	Purpose	Default
DAPR_APP_PORT	Port the plugin listens on	8080
DAPR_HTTP_PORT	Dapr sidecar HTTP port	3500
DAPR_API_TOKEN	Dapr sidecar auth token	—

v1 Limitations

Compared to the .NET SDK:

• Monolithic dispatch — all tools route through on_invoke_tool() (no handler-per-tool classes)
• No middleware pipeline — no built-in error handling, logging, or validation middleware
• No DI container — plugins manage their own dependencies

Handler-per-tool, middleware, and DI are planned for v2.

Development

pip install -e ".[dev]"
pytest

Dependencies: fastapi>=0.115.0, uvicorn[standard]>=0.32.0, httpx>=0.27.0, pydantic>=2.10.0