endfield-mcp/dist/utils/log.js

MCP Server for Arknights: Endfield (TypeScript / stdio + Streamable HTTP)

/**
 * Shared stderr logger.
 *
 * All Endfield-MCP logging goes to stderr — stdout is reserved for the
 * MCP JSON-RPC channel in stdio mode. Each module that logs creates a
 * scoped logger via `createLogger("ef.xxx")` so log lines are prefixed
 * with their origin for easy filtering.
 *
 * Format: `<ISO timestamp> <LEVEL> <scope>: <message>`
 */
export function createLogger(scope) {
    return (level, msg) => {
        const ts = new Date().toISOString();
        process.stderr.write(`${ts} ${level} ${scope}: ${msg}\n`);
    };
}
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