dsh-agent-lang

In DeepSeek Harness, every tool-call description is rendered verbatim on the UI card, yet the tool schema guidance for that field is entirely English with English examples. The model therefore writes English descriptions by default, no matter what locale the interface is set to. Users working in Chinese, Japanese, or Korean end up reading a mix of their UI language and stray English on every single step. dsh-agent-lang closes that gap.

It operates purely at the prompt level: each turn injects a language directive into the runtime-context snapshot, telling the model the current GUI locale and asking it to write tool descriptions, reasoning, and replies in that language. Three modes are available—follow the UI locale (explicit setting takes priority over browser language), force any BCP 47 tag (zh, ja, ko, etc.), or disable entirely and fall back to default English. It covers standard, PTC, Cordis, and user-defined presets. Switching the interface language takes effect on the very next request with no restart, and no preset, persona, or tool schema is ever modified.

If you run tool-heavy workflows in DSH—multi-step task orchestration, code review, shell automation—and want card titles, model reasoning, and final output to all match your interface language, this pure-JS, zero-build, zero-extra-dependency plugin is a drop-in fix. It leaves no deployment assets behind, so upstream upgrades never overwrite it. Minimal mode is excluded by design due to its sealed prompt; every other mode works out of the box.