[Bug] Anthropic API Error: Cannot modify thinking blocks in assistant message

Bug Description
⎿ API Error: 400 messages.1.content.11: thinking or redacted_thinking blocks in the latest assistant message cannot be modified. These blocks must remain as they were in the original response.

Environment Info

• Platform: linux
• Terminal: vscode
• Version: 2.1.154
• Feedback ID: c62ee383-16bb-4a06-aa15-78eeaf2cd6c4

Errors

[{"error":"Error: Tool bash not found\n    at x54 (/$bunfs/root/src/entrypoints/cli.js:4036:14129)\n    at vz (/$bunfs/root/src/entrypoints/cli.js:580:21150)\n    at qj (/$bunfs/root/src/entrypoints/cli.js:580:39922)\n    at SKH (/$bunfs/root/src/entrypoints/cli.js:580:50731)\n    at b8 (/$bunfs/root/src/entrypoints/cli.js:580:87760)\n    at IKH (/$bunfs/root/src/entrypoints/cli.js:580:86726)\n    at Wn (/$bunfs/root/src/entrypoints/cli.js:580:86546)\n    at rC (/$bunfs/root/src/entrypoints/cli.js:580:82882)\n    at Y$ (/$bunfs/root/src/entrypoints/cli.js:580:6440)\n    at lw6 (/$bunfs/root/src/entrypoints/cli.js:573:5415)","timestamp":"2026-06-01T00:00:29.750Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.5.content.25: `thinking` or `redacted_thinking` blocks in the latest assistant message cannot be modified. These blocks must remain as they were in the original response.\"},\"request_id\":\"req_011CbbaDMgzpXbfBonFrsjpp\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:63571)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-01T00:13:19.764Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.5.content.25: `thinking` or `redacted_thinking` blocks in the latest assistant message cannot be modified. These blocks must remain as they were in the original response.\"},\"request_id\":\"req_011CbbaT42FjChDpHJjzZo7c\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:63571)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-01T00:16:25.610Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.1.content.11: `thinking` or `redacted_thinking` blocks in the latest assistant message cannot be modified. These blocks must remain as they were in the original response.\"},\"request_id\":\"req_011Cbbb1fiVCpxiv1SHaPBVa\"}\n    at generate (/$bunfs/root/src/entrypoints/cli.js:11:63571)\n    at makeRequest (/$bunfs/root/src/entrypoints/cli.js:51:7694)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-06-01T00:23:48.194Z"}]