From 66eb12294a5f96269a1d478149d5fc0ba1e44234 Mon Sep 17 00:00:00 2001
From: Ravi Tharuma <RaviTharuma@users.noreply.github.com>
Date: Wed, 25 Mar 2026 07:52:32 +0100
Subject: [PATCH] fix: clear stale thinking signature when no block is open

---
 internal/translator/codex/claude/codex_claude_response.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/internal/translator/codex/claude/codex_claude_response.go b/internal/translator/codex/claude/codex_claude_response.go
index 4557606f..4db4c9fc 100644
--- a/internal/translator/codex/claude/codex_claude_response.go
+++ b/internal/translator/codex/claude/codex_claude_response.go
@@ -389,6 +389,7 @@ func ClaudeTokenCount(_ context.Context, count int64) []byte {
 
 func finalizeCodexThinkingBlock(params *ConvertCodexResponseToClaudeParams) []byte {
 	if !params.ThinkingBlockOpen {
+		params.ThinkingSignature = ""
 		return nil
 	}