docs: add Atomic Chat provider section (#23069)

1 files changed, 38 insertions, 0 deletions

diff --git a/packages/web/src/content/docs/providers.mdx b/packages/web/src/content/docs/providers.mdx
index 752f6c054..8576ec356 100644
--- a/packages/web/src/content/docs/providers.mdx
+++ b/packages/web/src/content/docs/providers.mdx
@@ -334,6 +334,44 @@ the following subscriptions in OpenCode with zero setup:
 
 ---
 
+### Atomic Chat
+
+You can configure opencode to use local models through [Atomic Chat](https://atomic.chat), a desktop application that runs local LLMs behind an OpenAI-compatible API server (default endpoint `http://127.0.0.1:1337/v1`).
+
+```json title="opencode.json" "atomic-chat" {5, 6, 8, 10-14}
+{
+  "$schema": "https://opencode.ai/config.json",
+  "provider": {
+    "atomic-chat": {
+      "npm": "@ai-sdk/openai-compatible",
+      "name": "Atomic Chat (local)",
+      "options": {
+        "baseURL": "http://127.0.0.1:1337/v1"
+      },
+      "models": {
+        "<your-model-id>": {
+          "name": "<your-model-name>"
+        }
+      }
+    }
+  }
+}
+```
+
+In this example:
+
+- `atomic-chat` is the custom provider ID. This can be any string you want.
+- `npm` specifies the package to use for this provider. Here, `@ai-sdk/openai-compatible` is used for any OpenAI-compatible API.
+- `name` is the display name for the provider in the UI.
+- `options.baseURL` is the endpoint for the local server. Change the host and port to match your Atomic Chat setup.
+- `models` is a map of model IDs to their display names. Each ID must match the `id` returned by `GET /v1/models` — run `curl http://127.0.0.1:1337/v1/models` to list the ids currently loaded in Atomic Chat.
+
+:::tip
+If tool calls aren't working well, pick a loaded model with strong tool-calling support (for example, a Qwen-Coder or DeepSeek-Coder variant).
+:::
+
+---
+
 ### Azure OpenAI
 
 :::note