Direct answer: On September 3 DeepSeek Harness shipped v0.1.2-rc.1, the first Release Candidate for the 0.1.2 series, rolling up the major user- and developer-facing changes accumulated across five alphas (Aug 27 to Sep 2).
What this release gathers
Officially "a summary of the major changes since v0.1.1-rc.2", split by audience:
For users: the session flow collapses process content and the System prompt of completed answers by default; body width is adaptive or draggable; every answer ends with token usage and duration (expandable to precise stats); turn navigation covers the full history with previews of unloaded rounds; UI font-size control with Markdown tables scaling alongside; third-party interface languages and localized permission categories.
For developers/integrators: subagent model selection levels up — agents can autonomously pick models within their authorization, and callers can pin provider, model, reasoning effort and max output length (Claude Code and Codex providers configurable); the Python SDK runtime adds Windows x64 packages; ACP gains standard session control, model settings, MCP, permissions and cancellation; the DeepSeek official adapter sends enabled plugin names and versions by default (disableable), with optional incremental session-log upload (off by default); plus experimental Inspector and Web Preview tools.
How to read it
From alpha.1 on August 27 to rc.1 on September 3, DSH covered five alphas in eight days — the "Everything is a Plugin" line still iterates ferociously. Session experience (collapse/navigation/stats) and subagent scheduling are 0.1.2's two themes, colliding with Hermes v0.21.0's Pantheon direction (our coverage) on "making agent fleets pleasant". For selection context, see the Agent Harness glossary entry and the comparison hub; DeepSeek-side model pricing was previously laid out in the cost checklist.
Sources
- DeepSeek Harness official release (2026-09-03): v0.1.2-rc.1
Direct answer: DeepSeek Harness 于 9 月 3 日发布 v0.1.2-rc.1——0.1.2 系列的首个候选版本（Release Candidate），把五个 alpha（08-27 至 09-02）累积的主要用户与开发者变更汇总到位。
这一版收拢了什么
官方口径「汇总自 v0.1.1-rc.2 以来的主要变更」，按受众拆：
面向使用者：会话流默认折叠已完成回答的过程内容与 System prompt；正文宽度自适应或拖拽；回答末尾显示 token 用量与耗时（可展开精确统计）；覆盖完整历史的回合导航（可预览跳转未载入轮次）；界面字号调节与 Markdown 表格随正文缩放；第三方界面语言支持与权限分类本地化。
面向开发者/集成者：子代理模型选择升级——Agent 可在授权范围内自主选模型，调用方也能指定提供方、模型、推理力度与最大输出长度（Claude Code、Codex 提供方可配模型）；Python SDK runtime 新增 Windows x64 发行包；ACP 补齐标准会话控制、模型设置、MCP、权限与取消能力；DeepSeek 官方适配器默认随请求提供已启用插件的包名与版本（可关），新增可选的 Session 日志增量上传（默认关）；另有实验性 Inspector 与 Web Preview 工具。
怎么看
从 8 月 27 日 alpha.1 到 9 月 3 日的 rc.1，DSH 用 8 天走完五个 alpha——「Everything is a Plugin」路线的迭代速度依旧凶猛。会话体验（折叠/导航/统计）与子代理调度是 0.1.2 的两大主题，与 Hermes v0.21.0 的 Pantheon 方向（本站报道）在「让 Agent 编队好用」上再次撞线。选型背景可对照站内 Agent Harness 术语页与对比总览；DeepSeek 侧模型定价此前也在成本清单里梳理过。
来源
- DeepSeek Harness 官方 release（2026-09-03）：v0.1.2-rc.1