What causes the tag bug in OpenClaw?

Greedy regex stripping across SSE chunk boundaries eats adjacent content—no errors.

How do you test SSE streaming bugs?

Diff stream:true vs false outputs char-by-char; force tags over chunk splits.

Yes—stateful parsers or out-of-band metadata, not full buffering.

Your AI agent spits out perfect responses internally. Then SSE chews half away. Meet the <final> tag bug—no error, pure silence.

theAIcatchup Apr 09, 2026 3 min read

SSE regex stripping <final> tags devours adjacent AI response lines silently. 𝕏
In-band signaling in streams is a proven failure; use metadata channels. 𝕏
Test chunk boundaries rigorously—100% repro makes fixes swift, but risks erode trust. 𝕏

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#<final> tag #AI agent errors #OpenClaw pipeline #SSE streaming bug

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Originally reported by dev.to