Unverified50% confidenceOpinionExact time
For most HITL scenarios, a layered design is more realistic than a single mechanism: use PoW or rate limiting on the request side to block abuse; on the reply side, use short-lived signed tokens to bind requests to decisions, together with a lightweight storage layer for temporary storage and forwarding; when the client resumes running, it pulls and verifies the signature using the token.
1
Sources
50%
Confidence
Long-term
Relevance
10/17/2026
First Seen
Sources
The "Reply" Loop of Human-in-the-Loop Agents: Architectural Thoughts on Secure Asynchronous Callbacks
redditr/LangChain10/17/2026
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