[FEATURE]: `opencode run` A flag for removing the preamble.

[Blankeos]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

opencode run is pretty useful for small stdin piping stuff i.e. jesseduffield/lazygit#5389

But I dont know if there's a way to remove the preamble

❯ opencode run "Write me a sample commit message, w/ a message / body format"

> build · qwen3.5:397b

'''
feat: add user authentication system

Implement JWT-based authentication with refresh tokens.
Adds login, logout, and token refresh endpoints.

Closes #123
'''

**Format:**
- **Line 1:** `<type>: <subject>` (max 50 chars, imperative mood)
- **Line 2:** Blank
- **Line 3+:** Body (wrap at 72 chars, explain what/why)
- **Footer:** Optional (issue links, breaking changes)

**Common types:** `feat`, `fix`, `docs`, `style`, `refactor`, `test`, `chore`

btw I replaced the backticks with ''' so it formats well here

If we can remove this line more easily without any special parsing.

> build • <model>

Maybe like opencode run --no-preamble "Write me a commit message" ?

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• [FEATURE]: Quiet mode for CLI runs #6999: Very similar request — quiet/suppressed output for opencode run when used in scripts. That issue specifically asks to suppress tool call output, while this one focuses on the preamble line (> build · model). They may be best addressed together.

[Blankeos]

Ah cool, thanks gh actions for pointing duplicates.