fix: align opencode-zen provider setup

docs/concepts/model-providers.md

@@ -0,0 +1,162 @@
+---
+summary: "Model provider overview with example configs + CLI flows"
+read_when:
+  - You need a provider-by-provider model setup reference
+  - You want example configs or CLI onboarding commands for model providers
+---
+# Model providers
+
+This page covers **LLM/model providers** (not chat providers like WhatsApp/Telegram).
+For model selection rules, see [/concepts/models](/concepts/models).
+
+## Quick rules
+
+- Model refs use `provider/model` (example: `opencode/claude-opus-4-5`).
+- If you set `agents.defaults.models`, it becomes the allowlist.
+- CLI helpers: `clawdbot onboard`, `clawdbot models list`, `clawdbot models set <provider/model>`.
+
+## Built-in providers (pi-ai catalog)
+
+Clawdbot ships with the pi‑ai catalog. These providers require **no**
+`models.providers` config; just set auth + pick a model.
+
+### OpenAI
+
+- Provider: `openai`
+- Auth: `OPENAI_API_KEY`
+- Example model: `openai/gpt-5.2`
+- CLI: `clawdbot onboard --auth-choice openai-api-key`
+
+```json5
+{
+  agents: { defaults: { model: { primary: "openai/gpt-5.2" } } }
+}
+```
+
+### Anthropic
+
+- Provider: `anthropic`
+- Auth: `ANTHROPIC_API_KEY` or `claude setup-token`
+- Example model: `anthropic/claude-opus-4-5`
+- CLI: `clawdbot onboard --auth-choice setup-token`
+
+```json5
+{
+  agents: { defaults: { model: { primary: "anthropic/claude-opus-4-5" } } }
+}
+```
+
+### OpenAI Code (Codex)
+
+- Provider: `openai-codex`
+- Auth: OAuth or Codex CLI (`~/.codex/auth.json`)
+- Example model: `openai-codex/gpt-5.2`
+- CLI: `clawdbot onboard --auth-choice openai-codex` or `codex-cli`
+
+```json5
+{
+  agents: { defaults: { model: { primary: "openai-codex/gpt-5.2" } } }
+}
+```
+
+### OpenCode Zen
+
+- Provider: `opencode`
+- Auth: `OPENCODE_API_KEY` (or `OPENCODE_ZEN_API_KEY`)
+- Example model: `opencode/claude-opus-4-5`
+- CLI: `clawdbot onboard --auth-choice opencode-zen`
+
+```json5
+{
+  agents: { defaults: { model: { primary: "opencode/claude-opus-4-5" } } }
+}
+```
+
+### Google Gemini (API key)
+
+- Provider: `google`
+- Auth: `GEMINI_API_KEY`
+- Example model: `google/gemini-3-pro`
+- CLI: `clawdbot onboard --auth-choice gemini-api-key`
+
+### Google Vertex / Antigravity / Gemini CLI
+
+- Providers: `google-vertex`, `google-antigravity`, `google-gemini-cli`
+- Auth: Vertex uses gcloud ADC; Antigravity/Gemini CLI use their respective auth flows
+- CLI: `clawdbot onboard --auth-choice antigravity` (others via interactive wizard)
+
+### Z.AI (GLM)
+
+- Provider: `zai`
+- Auth: `ZAI_API_KEY`
+- Example model: `zai/glm-4.7`
+- CLI: `clawdbot onboard --auth-choice zai-api-key`
+  - Aliases: `z.ai/*` and `z-ai/*` normalize to `zai/*`
+
+### Other built-in providers
+
+- OpenRouter: `openrouter` (`OPENROUTER_API_KEY`)
+- Example model: `openrouter/anthropic/claude-sonnet-4-5`
+- xAI: `xai` (`XAI_API_KEY`)
+- Groq: `groq` (`GROQ_API_KEY`)
+- Cerebras: `cerebras` (`CEREBRAS_API_KEY`)
+- Mistral: `mistral` (`MISTRAL_API_KEY`)
+- GitHub Copilot: `github-copilot` (`COPILOT_GITHUB_TOKEN` / `GH_TOKEN` / `GITHUB_TOKEN`)
+
+## Providers via `models.providers` (custom/base URL)
+
+Use `models.providers` (or `models.json`) to add **custom** providers or
+OpenAI/Anthropic‑compatible proxies.
+
+### MiniMax
+
+MiniMax is configured via `models.providers` because it uses custom endpoints:
+
+- MiniMax Cloud (OpenAI‑compatible): `--auth-choice minimax-cloud`
+- MiniMax API (Anthropic‑compatible): `--auth-choice minimax-api`
+- Auth: `MINIMAX_API_KEY`
+
+### Local proxies (LM Studio, vLLM, LiteLLM, etc.)
+
+Example (OpenAI‑compatible):
+
+```json5
+{
+  agents: {
+    defaults: {
+      model: { primary: "lmstudio/minimax-m2.1-gs32" },
+      models: { "lmstudio/minimax-m2.1-gs32": { alias: "Minimax" } }
+    }
+  },
+  models: {
+    providers: {
+      lmstudio: {
+        baseUrl: "http://localhost:1234/v1",
+        apiKey: "LMSTUDIO_KEY",
+        api: "openai-completions",
+        models: [
+          {
+            id: "minimax-m2.1-gs32",
+            name: "MiniMax M2.1",
+            reasoning: false,
+            input: ["text"],
+            cost: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0 },
+            contextWindow: 200000,
+            maxTokens: 8192
+          }
+        ]
+      }
+    }
+  }
+}
+```
+
+## CLI examples
+
+```bash
+clawdbot onboard --auth-choice opencode-zen
+clawdbot models set opencode/claude-opus-4-5
+clawdbot models list
+```
+
+See also: [/gateway/configuration](/gateway/configuration) for full configuration examples.

docs/concepts/models.md

@@ -9,6 +9,7 @@ read_when:
 
 See [/concepts/model-failover](/concepts/model-failover) for auth profile
 rotation, cooldowns, and how that interacts with fallbacks.
+Quick provider overview + examples: [/concepts/model-providers](/concepts/model-providers).
 
 ## How model selection works