docs: align auto variant with live config

README.md

@@ -74,7 +74,7 @@ After the plugin is installed, add a provider entry in `~/.config/opencode/openc
           "options": {},
           "variants": {
             "off":    { "reasoning_effort": "off" },
-            "auto":   {},
+            "auto":   { "reasoning_effort": "auto" },
             "low":    { "reasoning_effort": "low" },
             "medium": { "reasoning_effort": "medium" },
             "high":   { "reasoning_effort": "high" }

src/index.ts

@@ -49,7 +49,7 @@ function buildConfigBlock(info: { model_id: string; context_length?: number; dis
               ...(ctx > 0 ? { limit: { context: ctx } } : {}),
               variants: {
                 off: { reasoning_effort: "off" },
-                auto: {},
+                auto: { reasoning_effort: "auto" },
                 low: { reasoning_effort: "low" },
                 medium: { reasoning_effort: "medium" },
                 high: { reasoning_effort: "high" },

test/plugin.test.ts

@@ -412,6 +412,6 @@ test("auth callback prints a config snippet with top-level model variants", asyn
   const model = parsed.provider[PROVIDER_ID]!.models[MODEL_ID]!
   expect(model.limit?.context).toBe(262144)
   expect(model.variants?.off).toEqual({ reasoning_effort: "off" })
-  expect(model.variants?.auto).toEqual({})
+  expect(model.variants?.auto).toEqual({ reasoning_effort: "auto" })
   expect(model.options?.variants).toBeUndefined()
 })