DeepSeek ships desktop apps for its open-source agent harness

DeepSeek released official macOS and Windows apps for DeepSeek Harness v0.2, an MIT-licensed agent harness, in preview. It adds a plugin manager, file and code-change review, and scheduled Automation Tasks. It also supports non-DeepSeek models via OpenAI-compatible endpoints.

Why it matters: DeepSeek is moving from model supplier to the agent-tooling layer, competing directly with Claude Code and Codex-style products. Model-agnostic support and an MIT license lower switching costs, and make the harness a possible default for developers who want to mix models.