Running Opencode prevents running any Bun commands in Bun projects

[cream-hub]

Description

Basically sometimes when I run opencode afterwards I can no longer use bun because this what I get as an output

❯ bun run dev
$ bun run scripts/generate-icon-manifest.ts

> build · claude-opus-4-6

Opencode it's injecting inself into all of my bun commands

This is what Opencode has to say about this issue

opencode is a terminal-based AI coding tool (similar to Claude Code). It needs to intercept and wrap bun and node calls made by the projects it manages — likely to inject instrumentation, capture output, or control the runtime environment.

The mechanism:
1. When opencode starts a session, it creates a temp directory like /tmp/bun-node-<hash>/
2. It places symlinks in that directory: bun -> opencode and node -> opencode
3. It prepends that temp directory to PATH when spawning subprocesses
4. When a subprocess calls bun or node, it hits the symlink, which actually runs opencode — opencode detects it was invoked as "bun" or "node" (via argv[0]), does whatever interception it needs, then delegates to the real binary
This is a common pattern called PATH shimming — tools like nvm, asdf, volta, and mise all do something similar.

Plugins

No response

OpenCode version

1.2.27

Steps to reproduce

1. Run Opencode, it generates the shims
2. Try running any Bun project
3. You get greeted with Opencode stuff

Screenshot and/or share link

Operating System

macOS

Terminal

Ghostty

[cream-hub]

This was installed via brew. Never had this problem when I installed with curl.

[cedws]

I've been investigating a weird issue where somehow bun became symlinked to opencode. This looks like it's something to do with the Zed ACP extension:

$ ls -l /private/tmp/bun-node-30e609e08/
total 0
lrwxr-xr-x@ 1 development  wheel  111 25 Mar 18:25 bun@ -> /Users/development/Library/Application Support/Zed/external_agents/opencode/opencode/v_57261030291f074/opencode
lrwxr-xr-x@ 1 development  wheel  111 25 Mar 18:25 node@ -> /Users/development/Library/Application Support/Zed/external_agents/opencode/opencode/v_57261030291f074/opencode

This broke scripts inside package.json that invoke bun and led to this bizarre result:

{
  ...
  "scripts": {
    "dev": "bun --help"
  }
}

> bun run dev
$ bun --help

▄
█▀▀█ █▀▀█ █▀▀█ █▀▀▄ █▀▀▀ █▀▀█ █▀▀█ █▀▀█
█  █ █  █ █▀▀▀ █  █ █    █  █ █  █ █▀▀▀
▀▀▀▀ █▀▀▀ ▀▀▀▀ ▀▀▀▀ ▀▀▀▀ ▀▀▀▀ ▀▀▀▀ ▀▀▀▀

[cream-hub]

Interesting, but that would mean I'd need to install the OpenCode Zed extension right? Currently it's not installed.