fix(source-control): preserve Pi configured default intent

src/shared/commit-message-agent-spec.ts

@@ -107,7 +107,7 @@ const CLAUDE_THINKING_LEVELS: ThinkingLevel[] = [
   { id: 'max', label: 'Max' }
 ]
 
-const PI_DEFAULT_MODEL_ID = 'default'
+export const PI_DEFAULT_MODEL_ID = 'default'
 
 /**
  * The model id Orca used to persist for Pi before `Pi default` existed. Orca itself
@@ -157,6 +157,12 @@ function withOpenAiThinking(
     : {}
 }
 
+export const PI_COMPATIBILITY_MODEL: CommitMessageModel = {
+  id: PI_RETIRED_COPILOT_DEFAULT_MODEL_ID,
+  label: 'Github Copilot GPT 5.4 Mini',
+  ...withOpenAiThinking('gpt-5.4-mini')
+}
+
 export function parseClaudeModels(stdout: string): CommitMessageModel[] {
   return uniqueModels(
     parseClaudeModelList(stdout).map((model) => {