mcp-mappers.ts•3.59 kB
import {
GetPromptResult,
ListResourcesResult,
ListPromptsResult,
ReadResourceResult,
} from "@modelcontextprotocol/sdk/types.js";
import type {
SystempromptPromptResponse,
SystempromptBlockResponse,
SystempromptAgentResponse,
} from "../types/systemprompt.js";
/**
* Maps input schema properties to MCP argument format.
* Shared between single prompt and list prompt mappings.
*/
function mapPromptArguments(prompt: SystempromptPromptResponse) {
return Object.entries(prompt.input.schema.properties || {})
.map(([name, schema]) => {
if (typeof schema === "boolean") return null;
if (typeof schema !== "object" || schema === null) return null;
return {
name,
description:
"description" in schema ? String(schema.description || "") : "",
required: prompt.input.schema.required?.includes(name) || false,
};
})
.filter((arg): arg is NonNullable<typeof arg> => arg !== null);
}
/**
* Maps a single prompt to the MCP GetPromptResult format.
* Used when retrieving a single prompt's details.
*/
export function mapPromptToGetPromptResult(
prompt: SystempromptPromptResponse
): GetPromptResult {
return {
name: prompt.metadata.title,
description: prompt.metadata.description || undefined,
messages: [
{
role: "assistant",
content: {
type: "text",
text: prompt.instruction.static,
},
},
],
arguments: mapPromptArguments(prompt),
tools: [],
_meta: { prompt },
};
}
/**
* Maps an array of prompts to the MCP ListPromptsResult format.
* Used when listing multiple prompts.
*/
export function mapPromptsToListPromptsResult(
prompts: SystempromptPromptResponse[]
): ListPromptsResult {
return {
_meta: { prompts },
prompts: prompts.map((prompt) => ({
name: prompt.metadata.title,
description: prompt.metadata.description || undefined,
arguments: mapPromptArguments(prompt),
})),
};
}
/**
* Maps a single block to the MCP ReadResourceResult format.
* Used when retrieving a single block's details.
*/
export function mapBlockToReadResourceResult(
block: SystempromptBlockResponse
): ReadResourceResult {
return {
contents: [
{
uri: `resource:///block/${block.id}`,
mimeType: "text/plain",
text: block.content,
},
],
_meta: {},
};
}
export function mapAgentToReadResourceResult(
agent: SystempromptAgentResponse
): ReadResourceResult {
return {
contents: [
{
uri: `resource:///agent/${agent.id}`,
mimeType: "text/plain",
text: agent.content,
},
],
_meta: {
agent: true
},
};
}
/**
* Maps an array of blocks to the MCP ListResourcesResult format.
* Used when listing multiple blocks.
*/
export function mapBlocksToListResourcesResult(
blocks: SystempromptBlockResponse[]
): ListResourcesResult {
return {
_meta: {},
resources: blocks.map((block) => ({
uri: `resource:///block/${block.id}`,
name: block.metadata.title,
description: block.metadata.description || undefined,
mimeType: "text/plain",
})),
};
}
export function mapAgentsToListResourcesResult(
agents: SystempromptAgentResponse[]
): ListResourcesResult {
return {
_meta: {},
resources: agents.map((agent) => ({
uri: `resource:///agent/${agent.id}`,
name: agent.metadata.title,
description: agent.metadata.description || undefined,
mimeType: "text/plain",
_meta: {
agent: true
}
})),
};
}