The planner falls back to CLARIFY whenever no keyword matches and the model
plan is unavailable or malformed. Mid-conversation that produced a dead end:
a follow-up such as "如果我要报销，一般需要查哪几个文件？" was answered with a
clarification request even though the previous turn had established context.
When a non-media request carries a conversationId and a contextVersion above
zero (i.e. at least one turn has completed), route CLARIFY to KNOWLEDGE_QA
with a grounded knowledge search.
Tradeoff: this also suppresses the deliberate CLARIFY for explicitly vague
phrasing ("你看着办", "帮我处理一下") from the second turn onward, which will
now run a knowledge search instead of asking back. Blank input is still
rejected earlier by requireQuestion.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
adminandClaude Opus 5
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