# DeepSeek releases Harness 0.1.5 with V4.1 Flash support, file uploads and sidebar previews

> Source: <https://technode.com/2026/09/10/deepseek-releases-harness-0-1-5-with-v4-1-flash-support-file-uploads-and-sidebar-previews/>
> Published: 2026-09-10 07:44:17+00:00

DeepSeek has released version 0.1.5 of DeepSeek Harness, adding dedicated optimization for V4.1 Flash and new file-upload and sidebar-preview features, IT Home reported on Sept. 10.

Version 0.1.5 supports V4.1 Flash in standard, programmatic tool-calling (PTC) and minimal modes. It also allows system prompts to be updated while retaining existing KV Cache, and lets users upload images and PDFs for model-assisted file reading.

The update adds workspace file-tree previews for Markdown, HTML, PDF, code and image files, standardized plugin extension points, improved long-session performance and two-way communication with child agents. An experimental Agent Teams plugin lets a main agent create and coordinate multiple team members, but is disabled by default. [[IT Home](https://www.ithome.com/1/000/715.htm), in Chinese]