docs: make technical prose concrete

apps/cli/src/args.ts

@@ -138,7 +138,7 @@ Examples:
       resolved = { mode: 'profile', profile, patches }
     })
 
-  /** Reject parent options that crossed a subcommand boundary. */
+  /** Reject parent options supplied before a subcommand. */
   const rejectParentOptions = (command: string): void => {
     const parent = program.opts<{
       profile?: string

apps/cli/src/process-shutdown.ts

@@ -14,8 +14,8 @@ export interface ProcessShutdown {
 /**
  * Create one process-exit controller around an application disposer.
  * @param dispose - Whole-application teardown that resolves at quiescence.
- * @param forceExit - Forced process exit boundary, replaceable by tests.
- * @param complete - Natural process completion boundary, replaceable by tests.
+ * @param forceExit - Function that exits the process immediately, replaceable by tests.
+ * @param complete - Function that records the natural completion code, replaceable by tests.
  * @param timeoutMs - Grace before forced exit, replaceable by tests.
  * @returns A controller whose normal calls coalesce and whose repeated signal call escalates.
  */