Semantic Drift

Heddle can show whether the agent's responses are drifting away from the recent semantic trajectory of the conversation.

The CyberLoop workflow is observe-only. Drift telemetry is opt-in for chat sessions because it uses OpenAI Platform embeddings when enabled.

What Heddle Does

When CyberLoop is available, Heddle can:

load CyberLoop kinematics middleware
embed assistant output frames
compare the current response trajectory against the previous assistant response when available
show drift=unknown|low|medium|high in the chat footer
highlight medium/high drift in the status bar
write cyberloop.annotation events into saved traces

Tool outputs are excluded from chat drift scoring so the signal focuses on where the agent's own responses are heading.

Chat drift uses a more sensitive default stability threshold than CyberLoop's library default.
Set HEDDLE_DRIFT_STABILITY_THRESHOLD if you want to tune it.
The toggle is saved on the active chat session.
OpenAI account sign-in is not used for drift embeddings; enable drift only when you intend to use OpenAI Platform API-key mode for this telemetry.
/drift reports the last unavailable reason if the middleware or embeddings fail.

Heddle does not calculate semantic drift itself. For the underlying methodology, see the CyberLoop repository and paper.