dsh-system1: A DSH plugin delivering typed decision services for DeepSeek Harness

What Does It Do?

System One is a DSH plugin for DeepSeek Harness that turns structured model decisions into a typed service consumer plugins can call directly. It removes the need to hand-build prompts, validate requests and responses, and manage timeouts or cancellation yourself, letting you get probabilistic decision results inside the harness and choose your own actions from them. A built-in TypeSafe/Jev provider ships with it, while other providers can implement the same public contract.

Core Features

• Three decision primitives: noul returns the probability that a proposition is true, choice returns a candidate key plus the full probability distribution, and score returns an expected level with probabilities ordered by criteria.
• Request and response validation: malformed call structures throw an input error, while runtime failures are reported per question with an error status instead of failing silently.
• Lifecycle control: cancellation, timeouts, and execution metadata are supported, with an 800 ms total timeout by default that can be tuned to backend latency.
• Provider registration: the bundled TypeSafe provider works out of the box with a default model and provider id, and alternative providers can follow the public contract.
• Type augmentation: consumer plugins that import the package's type augmentation get full typing on ctx.system1.decide() inputs and results.

How to Use This Plugin?

After enabling it in DSH, a consumer plugin declares the system1 injection and imports the type augmentation, then calls ctx.system1.decide() with a state description and multiple questions such as refund intent, topic choice, and urgency scoring. Branch on each question's status to handle results; because these are model outputs, your plugin picks its own thresholds and actions. To adjust behavior, tune the timeout setting and set the provider's required key in the DSH process environment. The plugin is maintained by exoticknight under the Apache-2.0 license and written in TypeScript.

How to Troubleshoot This Plugin?

A malformed call structure throws an input error, so first check that the state and question fields match the contract. Runtime failures do not abort the whole call; they come back per question with an error status, so inspect the error message for each affected question. If requests time out, follow the official guidance and raise the timeout setting to match backend latency; if the provider is unavailable, confirm the required key is set in the DSH process environment.