dsh-sub2api

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Connect your sub2api gateway to DeepSeek Harness as model providers.

Sub2API is an AI API gateway that turns subscription quota into OpenAI-compatible endpoints. In its model, each API key is bound to a group, and the group decides the platform (OpenAI / Claude / Grok) and the models that key can serve. The three provider routes (sub2api-openai, sub2api-claude, sub2api-grok) are served by the harness's own pi-ai adapter (dsh-llm-pi-ai): this plugin translates its llm-sub2api: settings into llm-pi-ai: provider profiles (all sharing one bare-host base URL, no /v1), and protocol serialization, streaming, and usage accounting all live in pi-ai. The same gateway serves OpenAI, Claude, and Grok models side by side, and the harness routes each request to the key whose group owns the requested model.

Features

• Image generation: select a generation model in settings. generate_image saves images to the workspace and returns an inline attachment. The separate image-analysis tool and its model selector have been removed.

• One base URL, three provider routes: sub2api-openai, sub2api-claude, sub2api-grok — each configured with its own key and at least one model, registered as a live LLM provider as soon as both are set.

• Streaming chat (backed by pi-ai): SSE streaming, tool calls, reasoning deltas, and token usage are mapped to the harness protocol by dsh-llm-pi-ai, which natively handles wire-format details like top-level function_call items in the Responses API.

• Model discovery: one-click "fetch models" calls GET {baseURL}/v1/models with the key, so each route's catalog matches exactly what the sub2api group serves.

• Reasoning effort (thinking mode): reasoning_effort is passed straight through to the gateway and adjustable right in the chat model selector; the settings page's per-model "reasoning strength" field fills each model's real levels from models.dev reasoning_options (e.g. gpt-5.6-sol → none/low/medium/high/xhigh/max, deepseek-v4-flash → low/high/max), editable in the settings page; reasoningEfforts: [] opts a model out.

• Usage lookup: "view usage" calls GET {baseURL}/v1/usage and summarizes quota, balance, rate limits, and subscription windows.

• Standards-based config: base URL and model catalogs live in the llm-sub2api: settings section ($DSH_HOME/settings.yaml, written by the web Models page); keys go through the harness credential store.

• Provider icons from lobehub/lobe-icons, embedded as SVG in the settings page.

Install

Requires DeepSeek Harness 0.1.2-rc.1 or later; typecheck, build, and compatibility tests also pass against 0.1.3-alpha.2. This version uses the settings service’s installSection API and the dsh-client-ui-renderer browser service; dsh-client-runtime is no longer required.

dsh plugin --profile web add @godd6366/dsh-sub2api

or, from this repository:

dsh plugin --profile web add .

Configure

Open Settings → Sub2API 模型 (or edit $DSH_HOME/settings.yaml directly):

llm-sub2api:
  baseURL: http://localhost:8080
  providers:
    openai:
      apiKeyEnv: SUB2API_OPENAI_API_KEY
      models:
        - id: gpt-5.6-sol
    claude:
      apiKeyEnv: SUB2API_CLAUDE_API_KEY
    grok:
      apiKeyEnv: SUB2API_GROK_API_KEY
  tools:
    generate:
      provider: openai
      model: gpt-image-1

Store each key through the credentials service (the web Models page writes it, or export SUB2API_OPENAI_API_KEY=… etc.). A route activates only when its platform has a key and at least one model; clear the key (or empty the model list) to drop the route again.

Wire protocol (automatic per group)

The gateway serves each platform group upstream through its NATIVE protocol, and pi-ai picks the endpoint automatically from the key's group — no configuration needed. Configure the bare host (no /v1): OpenAI-style endpoints get /v1 appended automatically, and the Anthropic SDK appends /v1/messages itself:

Speaking the native protocol means the gateway never has to convert chat/completions — that conversion is what drops/misaligns tool-call names and ids for parallel calls (unknown tool "", missing required property …). To force a different endpoint for a group whose gateway does not serve it natively, declare api on the provider in $DSH_HOME/settings.yaml (advanced; no settings-page control):

llm-sub2api:
  baseURL: http://localhost:8080
  providers:
    openai:
      apiKeyEnv: SUB2API_OPENAI_API_KEY
      api: openai-completions   # optional: openai-completions / openai-responses / anthropic-messages
      models:
        - id: gpt-5.6-sol

api accepts openai-completions (/v1/chat/completions), openai-responses (/v1/responses), or anthropic-messages (/v1/messages); omitted means the automatic group default above.

Relationship to dsh-llm-pi-ai

This plugin no longer implements the LLM protocol layer itself: the three sub2api-* routes are served by dsh-llm-pi-ai (shipped dormant with dsh-base) through llm-pi-ai: settings profiles. On every llm-sub2api: change (and at boot) the plugin translates the bare-host base URL, per-group models, and key references into hand-declared profiles and writes them to llm-pi-ai:, so routes register/drop live. The settings page, model discovery (GET /v1/models), usage lookup (GET /v1/usage), the image-generation tool remain this plugin's own.

Dependency note (pi-ai multi-turn guard): pi-ai's AssistantMessage.usage is required in its types and its prefix-token estimation dereferences it. The harness path is already safe: dsh-llm-pi-ai attaches a zero Usage to every reconstructed assistant message. This plugin still applies a defensive guard at boot (assistant.usage !== undefined before counting prefix tokens) to @earendil-works/pi-ai/dist/utils/estimate.js inside the dsh install, protecting other callers that build pi-ai contexts without usage. The patch is idempotent and is re-applied automatically after a dsh upgrade; on a read-only install run node scripts/patch-pi-ai.mjs manually.

Image input & reasoning effort

Attaching an image to the session model requires that model to declare the image input modality — otherwise the harness refuses before sending ("model does not support images"). Both fields are editable in model details: select image input and enter comma-separated reasoning levels, or disable reasoning. models.dev fills missing values without overriding manual choices:

• Image input: derived from models.dev attachment / modalities.input when present (e.g. gpt-5.6-luna → text+image, deepseek-v4-flash → text); otherwise guessed from the model id (gpt-*, claude-*, gemini-*, grok-*, glm-*, … default to text+image). Pin a model to text-only with input: [text] in $DSH_HOME/settings.yaml.
• Reasoning effort: derived from models.dev reasoning_options when present (e.g. deepseek-v4-flash → high/max); otherwise the default low/medium/high, and models with reasoning: false are marked unsupported.

When the model accepts images, the request carries the image in the group's native protocol: openai → Responses input_image, claude → Messages image (base64), grok → chat-completions image_url.

Development

npm install
npm run build     # tsdown → lib/ + client wrapper
npm run typecheck

License

MIT