feat(tui): select model reasoning effort

examples/tui-agent/tests/fixtures/tui-scripted-llm.ts

@@ -1,6 +1,12 @@
 import type { Context } from 'cordis'
-import type { GenerateOptions, LlmModelContext, LlmModelInfo, StreamChunk } from '@deepseek-ai/dsh-llm'
-import { CallId, LlmAdapter } from '@deepseek-ai/dsh-llm'
+import type {
+  GenerateOptions,
+  LlmModelContext,
+  LlmModelInfo,
+  LlmModelReasoningInfo,
+  StreamChunk,
+} from '@deepseek-ai/dsh-llm'
+import { CallId, LlmAdapter, ReasoningEffortId } from '@deepseek-ai/dsh-llm'
 
 const CONTROL_PROBE = '\u001b]2;MODEL_CONTROLLED\u0007\u001b[999CMODEL_CURSOR\u009b31mMODEL_C1'
 const INITIAL_TEXT = `I need one decision before I continue. ${CONTROL_PROBE}`
@@ -39,6 +45,20 @@ class ScriptedTuiAdapter extends LlmAdapter {
     return Promise.resolve({ contextWindow: 128_000 })
   }
 
+  override resolveModelReasoning(
+    _provider: string,
+    model: string,
+  ): Promise<LlmModelReasoningInfo | undefined> {
+    if (model !== 'tui-scripted-model-pro') return Promise.resolve(undefined)
+    return Promise.resolve({
+      efforts: [
+        { id: ReasoningEffortId('high'), name: 'High' },
+        { id: ReasoningEffortId('max'), name: 'Max' },
+      ],
+      defaultEffort: ReasoningEffortId('high'),
+    })
+  }
+
   override async * stream(options: GenerateOptions): AsyncIterable<StreamChunk> {
     // The session-title provider's auxiliary request carries no tool schemas,
     // unlike every agent turn; answer it with a fixed title so the PTY test can
@@ -47,8 +67,12 @@ class ScriptedTuiAdapter extends LlmAdapter {
       for (const chunk of textChunks(TITLE_TEXT)) yield chunk
       return
     }
-    if (options.model !== 'tui-scripted-model-pro' || !options.system?.includes('tui-scripted-model-pro')) {
-      throw new Error('the scripted TUI request did not apply the selected model to routing and prompt variables')
+    if (
+      options.model !== 'tui-scripted-model-pro'
+      || !options.system?.includes('tui-scripted-model-pro')
+      || options.reasoningEffort !== ReasoningEffortId('max')
+    ) {
+      throw new Error('the scripted TUI request did not apply the selected model and reasoning effort')
     }
     const lastMessage = options.messages.at(-1)
     const lastText = (lastMessage?.content ?? [])