dsh-vision

DSH (DeepSeek Harness) vision plugin: gives a text-only model two tools — describe_image (image recognition) and generate_image (image generation).

Built for personal use: engines ride what you already have (your logged-in Codex / ChatGPT account) with a free Zhipu fallback, every engine parameter is editable in the harness Settings page, and all temporary data is delete-after-use (用完即焚).

Tools

Tool	What it does	Primary engine	Fallback
describe_image	Reads a local image, returns a detailed text description; only the text enters the conversation (image bytes are never stored in the session)	Codex CLI (gpt-5.6-luna)	Zhipu glm-4.6v-flash (free)
generate_image	Generates an image from a prompt; result is saved as a conversation attachment and rendered inline in the chat	Codex (GPT Image via codex imagegen skill)	Zhipu cogview-3-flash (free)

Why two engines

• Codex — your own ChatGPT login, top-tier models (gpt-5.6-luna and friends), no extra key, works with gemini-flash-latest-style model names swapped freely. Requires the Codex CLI to be installed and logged in.
• Zhipu — free tiers (glm-4.6v-flash vision, cogview-3-flash generation), China-direct, works without a proxy. Needs a ZHIPU_API_KEY in ~/.dsh/.credentials.yaml.

The engine chain is configurable; when one engine fails, the next one is tried automatically, and the final error reports each engine's failure.

Engine registry (adding/removing models)

The plugin is built around an engine registry in lib/index.js:

const ENGINES = {
  codex: { id, label, describe(bytes, cfg, prompt, signal, ctx), generate(prompt, cfg, signal, ctx) },
  zhipu: { id, label, describe(...), generate(...) },
  // future: openai: { ... }, gemini: { ... }, ollama: { ... }
};

• Add a model: add one entry to ENGINES + one config object to the engines key of the settings schema (+ a default in DEFAULT_SETTINGS). Tool code does not change.
• Remove a model: delete the entry and its settings object.
• Reorder / choose a chain: edit / arrays in Settings (or the settings file) — e.g. to use Zhipu only.