Update handoff prompt wording and tests

Author: tninja

ai-code-task.el

@@ -282,10 +282,9 @@ Return the relevant file paths, matched excerpts, and a concise summary."
   "Build a prompt to load handoff CONTENT.
 WHOLE-FILE-P controls whether CONTENT came from the whole task file."
   (format
-   "Use this %s as portable agent handoff context for the current task.\n\
-Continue from the state described here.  Treat it as backend-neutral context,
-not as a transcript to replay.  Before making changes, restate the next action
-you plan to take.\n\n%s"
+   "Load this %s as portable agent handoff context for future work on the current task.\n\
+Continue from the state described here.  Treat it as backend-neutral reference
+context, not as a transcript to replay. Do not make any code change.\n\n%s"
    (if whole-file-p "whole task file" "agent handoff context")
    content))
 

test/test_ai-code-task.el

@@ -320,7 +320,7 @@
                  (lambda (_label prompt)
                    (setq sent-prompt prompt))))
         (ai-code-agent-handoff nil)))
-    (should (string-match-p "Use this agent handoff context" sent-prompt))
+    (should (string-match-p "Load this agent handoff context" sent-prompt))
     (should (string-match-p "Goal: finish backend-neutral handoff" sent-prompt))
     (should
      (string-match-p
@@ -342,7 +342,7 @@
                  (lambda (_label prompt)
                    (setq sent-prompt prompt))))
         (ai-code-agent-handoff '(4))))
-    (should (string-match-p "Use this whole task file" sent-prompt))
+    (should (string-match-p "Load this whole task file" sent-prompt))
     (should (string-match-p "Build handoff support" sent-prompt))
     (should (string-match-p "Carry all task notes forward" sent-prompt))))