Plugin install fails: BunInstallFailedError for github:guard22/opencode-multi-auth-codex@latest (Windows)

[ramhaidar]

opencode.jsonc:

...
  "plugin": [
    "opencode-antigravity-auth@latest",
    "opencode-openai-codex-auth@latest",
    "github:guard22/opencode-multi-auth-codex@latest"
  ],
...

Command: scoop update && scoop update opencode && opencode

Output:

Updating Scoop...
Updating Buckets...
Scoop was updated successfully!
opencode: 1.1.51 (latest version)
Latest versions for all apps are installed! For more information try 'scoop status'
{
  "name": "BunInstallFailedError",
  "data": {
    "pkg": "github:guard22/opencode-multi-auth-codex",
    "version": "latest"
  }
}

[insign]

Same error on linux. Using bun.

[insign]

✅ Workaround for BunInstallFailedError

I managed to solve this with help from Claude Sonnet. Here's what worked:

Installation Steps

1. Install manually in cache directory:

cd ~/.cache/opencode
bun add github:guard22/opencode-multi-auth-codex#736a15b

2. DO NOT add to opencode.json

OpenCode automatically detects plugins in ~/.cache/opencode/node_modules/.

3. Start the dashboard service (required):

opencode-multi-auth service install --port 3434 --host 127.0.0.1

The service must be running in the background for the plugin to work.

4. Add accounts using BOTH methods:

I added accounts using both methods with the same aliases (not sure which one actually works, but it worked):

# Method 1: CLI command
opencode-multi-auth add personal
opencode-multi-auth add work

# Method 2: OpenCode auth
opencode auth login
# Choose: OpenAI → Multi-account option
# IMPORTANT: Click the SECOND link that appears, not the first one

5. Verify:

opencode-multi-auth status
opencode models openai | grep codex

Why This Works

OpenCode has a bug where it appends @latest to GitHub plugins in opencode.json, causing:

github:guard22/opencode-multi-auth-codex#v1.0.9@latest (invalid URL → 404)

By installing directly in the cache, we bypass this bug.

Result

✅ Plugin loads successfully
✅ Codex models available (openai/gpt-5.3-codex, etc.)
✅ Multi-account rotation working

Related: This is likely the same bug as #12143

[ramhaidar]

@insign found alternative opencode-codex-auth