* fix(imessage): prevent echo loop from leaking internal metadata and amplifying NO_REPLY into queue overflow
- Add outbound sanitization at channel boundary (sanitize-outbound.ts):
strips thinking/reasoning tags, relevant-memories tags, model-specific
separators (+#+#), and assistant role markers before iMessage delivery
- Add inbound reflection guard (reflection-guard.ts): detects and drops
messages containing assistant-internal markers that indicate a reflected
outbound message, preventing recursive echo amplification
- Harden echo cache: increase text TTL from 5s to 30s to catch delayed
reflections that previously expired before the echo could be detected
- Add loop rate limiter (loop-rate-limiter.ts): per-conversation rapid-fire
detection that suppresses conversations exceeding threshold within a
time window, acting as a safety net against amplification
Closes#33281
* fix(imessage): address review — stricter reflection regex, loop-aware rate limiter
- Reflection guard: require closing > bracket on thinking/final/memory
tag patterns to prevent false-positives on user phrases like
'<final answer>' or '<thought experiment>' (#33295 review)
- Rate limiter: only record echo/reflection/from-me drops instead of
all dispatches, so the limiter acts as a loop-specific escalation
mechanism rather than a general throttle on normal conversation
velocity (#33295 review)
* Changelog: add iMessage echo-loop hardening entry
* iMessage: restore short echo-text TTL
* iMessage: ignore reflection markers in code
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Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
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