anomalyco / anomalyco/opencode
Invalid `signature` in `thinking` block
@jlongster is already working on this.
Since Sep 12, 2026.
- Dominant language
- TypeScript
- Stars
- 209k
- Forks
- 27.5k
- PR merge metrics
- PR metrics pending
Description
Description
messages.1.content.0: Invalid signature in thinking block. The block is bound to a different conversation. Remove the block, or set thinking.block_binding.prefix_mismatch_behavior to "drop_block". That setting requires the thinking-binding-controls-2026-08-01 value in the anthropic-beta header. The system prompt differs from the one this block was created with.
This happened specially with claude models
Plugins
No response
OpenCode version
1.18.30
Steps to reproduce
No response
Screenshot and/or share link
No response
Operating System
OS/Desktop: Linux Lite 6.4 (Ubuntu 22.04.5 LTS Jammy) / XFCE
Terminal
Emulator: xfce4-terminal 0.8.10 (Xfce 4.16) - VTE 6800 Shell: GNU bash 5.1.16(1)-release - /bin/bash TERM: xterm-256color, COLORTERM=truecolor
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Assessment
This issue has not been assessed yet.