docs: add plugin core and Telegram/OpenClaw adapter skeleton / 補 reply-end-controls 核心與 Telegram/OpenClaw 設計骨架

core/policy.md

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+# Policy
+
+## Goal
+
+Define how reply-end choices influence later assistant behavior.
+
+## Policy rules
+
+### If `lastChoice = continue`
+
+- assistant/runtime may continue normal follow-up behavior
+- assistant may keep short-term task momentum
+
+### If `lastChoice = stop`
+
+- assistant should not proactively extend the previous thread
+- assistant should avoid unnecessary follow-up prompts
+- assistant should treat the prior exchange as closed
+
+### If user types a new message
+
+- typed input takes priority over button state
+- the new message may implicitly reopen the interaction
+
+## V1 constraint
+
+V1 only needs to influence continuation behavior.
+
+It does not need to redesign routing, tool permissions, or long-term memory behavior.