feat: add deepseek provider

docs/docs.json

@@ -1106,6 +1106,7 @@
                   "providers/cloudflare-ai-gateway",
                   "providers/claude-max-api-proxy",
                   "providers/deepgram",
+                  "providers/deepseek",
                   "providers/github-copilot",
                   "providers/huggingface",
                   "providers/kilocode",

docs/providers/deepseek.md

@@ -0,0 +1,63 @@
+---
+summary: "DeepSeek setup (auth + model selection)"
+read_when:
+  - You want to use DeepSeek with OpenClaw
+  - You need the API key env var or CLI auth choice
+---
+
+# DeepSeek
+
+[DeepSeek](https://www.deepseek.com) provides powerful AI models with an OpenAI-compatible API.
+
+- Provider: `deepseek`
+- Auth: `DEEPSEEK_API_KEY`
+- API: OpenAI-compatible
+
+## Quick start
+
+1. Set the API key (recommended: store it for the Gateway):
+
+```bash
+openclaw setup --wizard --auth-choice deepseek-api-key
+```
+
+2. Set a default model:
+
+```json5
+{
+  agents: {
+    defaults: {
+      model: { primary: "deepseek/deepseek-chat" },
+    },
+  },
+}
+```
+
+## Non-interactive example
+
+```bash
+openclaw setup --wizard --non-interactive \
+  --mode local \
+  --auth-choice deepseek-api-key \
+  --deepseek-api-key "$DEEPSEEK_API_KEY"
+```
+
+This will set `deepseek/deepseek-chat` as the default model.
+
+## Environment note
+
+If the Gateway runs as a daemon (launchd/systemd), make sure `DEEPSEEK_API_KEY`
+is available to that process (for example, in `~/.openclaw/.env` or via
+`env.shellEnv`).
+
+## Available models
+
+| Model ID            | Name                     | Type      | Context |
+| ------------------- | ------------------------ | --------- | ------- |
+| `deepseek-chat`     | DeepSeek Chat (V3.2)     | General   | 128K    |
+| `deepseek-reasoner` | DeepSeek Reasoner (V3.2) | Reasoning | 128K    |
+
+- **deepseek-chat** corresponds to DeepSeek-V3.2 in non-thinking mode.
+- **deepseek-reasoner** corresponds to DeepSeek-V3.2 in thinking mode with chain-of-thought reasoning.
+
+Get your API key at [platform.deepseek.com](https://platform.deepseek.com/api_keys).