Bug: chat.message / experimental.chat.messages.transform hooks not firing in v1.17.1 #31731

Description

Description:
Plugin hooks chat.message and experimental.chat.messages.transform registered via the plugin system never fire in v1.17.1. Plugin module loads (import succeeds), but hook callbacks are never invoked. Same plugin/config works perfectly in v1.16.2.

Plugins

@sami7786/opencode-image-proxy

OpenCode version

v1.17.1

Steps to reproduce

Steps to reproduce:

1. Install opencode v1.17.1 via bun/npm
2. Install @sami7786/opencode-image-proxy plugin via opencode plugin @sami7786/opencode-image-proxy
3. Configure opencode-image-proxy.json with any vision-capable reader model
4. Paste an image into a chat using an image-incapable model (e.g. deepseek-v4-pro)
5. Image reaches model raw — plugin never intercepts

Screenshot and/or share link

No response

Operating System

ubuntu 26

Terminal

bash