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TREK/server/src/plugin-mcp-tools.ts
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Maurice 724c88c201 style: format server and shared with prettier
A mechanical prettier --write over server/src, server/tests, server/scripts
and shared/src with the workspaces' .prettierrc; nothing but layout and
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2026-10-10 21:23:37 +02:00

36 lines
1.7 KiB
TypeScript

// The seam that lets a per-session MCP server carry tools contributed by installed
// plugins, without src/nest/mcp-transport/ gaining an edge to the plugin runtime —
// the same module cycle trip-warnings.mcp.ts documents. Sibling of
// plugin-event-sink.ts and plugin-user-lifecycle.ts; the plugins layer registers
// the source at bootstrap and clears it on shutdown.
import type { McpContext, McpDynamicTool } from './nest-mcp';
/**
* PULL rather than push, unlike setPluginEventSink: the answer depends on the
* session's ctx, so there is nothing a push could carry ahead of time, and
* reading it on every attach means activating or uninstalling a plugin takes
* effect on the next session with nothing to invalidate. That is the argument
* channel-registry.ts already makes for setPluginChannelSource.
*
* Unlike every sink beside it this one returns a value on the request path. An
* unset source is not an error: it means "no plugin tools", which is the right
* answer for any app built without the plugins runtime, and for every test that
* never registers one.
*
* Deliberately NOT wrapped in try/catch here. nest-mcp's attach() contains a
* throwing source per its own contract and logs which one failed; catching it
* again on the way out would swallow that diagnostic and report the same
* degraded surface less usefully.
*/
export type PluginMcpToolSource = (ctx: McpContext) => readonly McpDynamicTool[] | Promise<readonly McpDynamicTool[]>;
let source: PluginMcpToolSource | null = null;
export function setPluginMcpToolSource(fn: PluginMcpToolSource | null): void {
source = fn;
}
export function getPluginMcpToolSource(): PluginMcpToolSource | null {
return source;
}