fix(llm): isolate retry policy histories

packages/examples/agent-spine-demo/src/index.ts

@@ -112,6 +112,8 @@ export interface Config {
   invariants?: InvariantConfig
   /** Opt-in persisted same-session goal stack; set false or omit to leave it unmounted. */
   goals?: GoalConfig | false
+  /** Invalid at bundle level; configure `retryPolicy` under each provider. */
+  llmRetry?: never
 }
 
 /** The skill config schema exported for app packages that forward `skills`. */
@@ -152,6 +154,9 @@ export const Config = z.intersect([
     toolTasks: z.union([z.const(false), ToolTasksConfigSchema]),
     invariants: InvariantService.Config,
     goals: z.union([z.const(false), GoalConfigSchema]),
+    // Schemastery preserves unknown object properties. A top-level llmRetry is
+    // known-but-impossible because provider retryPolicy owns this configuration.
+    llmRetry: z.never(),
   }) as unknown as z<Pick<Config, 'tools' | 'dshHome' | 'sessionTitle' | 'skills' | 'workspaceContext' | 'toolBash' | 'toolTasks' | 'invariants' | 'goals'>>,
 ]) as unknown as z<Config>