#@krill LLM request rejected: messages.15.content.0.thinking.signature: Field required

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clever island
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@krill LLM request rejected: messages.15.content.0.thinking.signature: Field required

midnight elmBOT
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clever island
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@slate plover can u help me fix that?

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im using antigravity with opus 4.6

frozen ploverBOT
# clever island @krill LLM request rejected: messages.15.content.0.thinking.signature: Field req...

That specific error usually means your session history contains “thinking” blocks that don’t have a required signature (often created when a stream was aborted/partial). Google Antigravity Claude is strict about this and rejects the next request when it sees unsigned thinking in the prior messages.

Fix options:

  1. Start a new session (fastest).
  2. Or run /thinking off for that agent, then retry.
  3. Also: update to the latest OpenClaw — newer versions strip unsigned thinking blocks for Google Antigravity Claude automatically.

Docs (FAQ): https://docs.openclaw.ai/help/faq (search for: “thinking signature required google antigravity”)

To confirm which path you’re on, paste:

  • openclaw --version
  • which model/provider you’re using (e.g. google-antigravity / “Claude via Antigravity”)
slate plover