feat: add configurable bootstrap truncation

src/config/types.ts

@@ -1593,6 +1593,8 @@ export type AgentDefaultsConfig = {
   workspace?: string;
   /** Skip bootstrap (BOOTSTRAP.md creation, etc.) for pre-configured deployments. */
   skipBootstrap?: boolean;
+  /** Max chars for injected bootstrap files before truncation (default: 20000). */
+  bootstrapMaxChars?: number;
   /** Optional IANA timezone for the user (used in system prompt; defaults to host timezone). */
   userTimezone?: string;
   /** Optional display-only context window override (used for % in status UIs). */