openclaw - 💡(How to fix) Fix Bug: stripInvalidThinkingSignatures modifies latest assistant message — causes Anthropic invalid_request_error

[assistant turn failed before producing content]
LLM error invalid_request_error: messages.15.content.1: thinking or redacted_thinking 
blocks in the latest assistant message cannot be modified. These blocks must remain 
as they were in the original response.

---

// dist/selection-BmjEdnnA.js — function stripInvalidThinkingSignatures (line ~2748)
// MISSING: protection for latest assistant message
function stripInvalidThinkingSignatures(messages) {
  let touched = false;
  const out = [];
  for (const message of messages) {  // <-- iterates ALL messages including latest
    if (!isAssistantMessageWithContent(message)) { ... }
    // strips thinking blocks — including from latest assistant turn ← BUG
  }
}

---

function dropThinkingBlocks(messages) {
  let latestAssistantIndex = -1;
  for (let i = messages.length - 1; i >= 0; i -= 1)
    if (isAssistantMessageWithContent(messages[i])) { latestAssistantIndex = i; break; }
  // ... skips i === latestAssistantIndex ← CORRECT
}

---

function stripInvalidThinkingSignatures(messages) {
  // Find latest assistant message — never strip its thinking blocks
  let latestAssistantIndex = -1;
  for (let i = messages.length - 1; i >= 0; i -= 1)
    if (isAssistantMessageWithContent(messages[i])) { latestAssistantIndex = i; break; }

  let touched = false;
  const out = [];
  for (let i = 0; i < messages.length; i++) {
    const message = messages[i];
    if (!isAssistantMessageWithContent(message)) { out.push(message); continue; }
    if (i === latestAssistantIndex) { out.push(message); continue; }  // ← ADD THIS
    // ... rest of existing logic unchanged
  }
  return touched ? out : messages;
}