weiqingy commented on code in PR #835:
URL: https://github.com/apache/flink-agents/pull/835#discussion_r3394050365


##########
python/flink_agents/plan/agent_plan.py:
##########
@@ -280,6 +294,8 @@ def _get_actions(agent: Agent) -> List[Action]:
         if marker is None:
             continue
         inner, listen_events, target = marker
+        if target is None:
+            _warn_if_action_returns_value(name, inner)

Review Comment:
   The warning fires for `@action`-decorated methods here, but actions 
registered imperatively via `add_action(name, events, func)` flow through the 
`agent.actions` loop below (around line 311) and skip this check — so a plain 
Python callable with `-> str` passed to `add_action` hits the same 
silent-discard trap with no warning. Issue #834 scopes this to decorated 
methods, so this may be deliberate — is covering the `add_action` path worth a 
follow-up, or intentionally out of scope?



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