@struktoai/mirage-core/dist/vfs/langfuse/langfuse.js

A Unified Virtual Filesystem For AI Agents

// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
import { LangfuseAccessor } from "../../accessor/langfuse.js";
import { HttpLangfuseTransport } from "../../core/langfuse/client.js";
import { read as langfuseRead } from "../../core/langfuse/read.js";
import { readdir as langfuseReaddir } from "../../core/langfuse/readdir.js";
import { stat as langfuseStat } from "../../core/langfuse/stat.js";
import { VFSName } from "../../types.js";
import { BaseVFS } from "../base.js";
import { LangfuseConfig } from "./config.js";
export const VFS_MD = `\`\`\`text
{prefix}
  traces/
    <trace-id>.json
  sessions/
    <session-id>/
      <trace-id>.json
  prompts/
    <prompt-name>/
      <version>.json
  datasets/
    <dataset-name>/
      items.jsonl
      runs/
        <run-name>.jsonl
\`\`\``;
export class LangfuseVFS extends BaseVFS {
    handed = {
        stat: ['entry'],
    };
    name = VFSName.LANGFUSE;
    cachesReads = true;
    vfsMd = VFS_MD;
    config;
    accessor;
    constructor(config) {
        super();
        this.config = config;
        const transportOpts = {
            publicKey: config.publicKey,
            secretKey: config.secretKey,
        };
        if (config.host !== undefined)
            transportOpts.host = config.host;
        if (config.timeout !== undefined)
            transportOpts.timeout = config.timeout;
        const accessorConfig = {};
        if (config.defaultTraceLimit !== undefined) {
            accessorConfig.defaultTraceLimit = config.defaultTraceLimit;
        }
        if (config.defaultFromTimestamp !== undefined) {
            accessorConfig.defaultFromTimestamp = config.defaultFromTimestamp;
        }
        this.accessor = new LangfuseAccessor(new HttpLangfuseTransport(transportOpts), accessorConfig);
    }
    readdir(path) {
        return langfuseReaddir(this.accessor, path);
    }
    async read(path) {
        return langfuseRead(this.accessor, path);
    }
    stat(path, handed) {
        return langfuseStat(this.accessor, path, handed?.entry);
    }
    getState() {
        return Promise.resolve(this.configState(LangfuseConfig, this.config));
    }
}
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