Summary

Description:

The automated environment context injected into agent sessions contains incorrect branch metadata. Specifically, the context block states:

│ "Main branch (you will usually use this for PRs): main"

However, the actual repository's default branch is master. This has caused repeated failures across multiple model sessions when agents attempt to run git commands against main, resulting in fatal: Not a valid object name main errors.

Impact:

• Agents cannot perform merge checks (git diff main..HEAD, git merge-tree, etc.) without explicit user correction
• Forces user intervention on every session to override incorrect branch assumptions
• Breaks automated workflows that depend on accurate default branch detection

Expected Behavior

Command should detect the actual default branch from the repository (git symbolic-ref refs/remotes/origin/HEAD or similar) rather than hardcoding or assuming main.

Actual Behavior

The automated environment context injected into agent sessions contains incorrect branch metadata. Specifically, the context block states:

│ "Main branch (you will usually use this for PRs): main"

However, the actual repository's default branch is master. This has caused repeated failures across multiple model sessions when agents attempt to run git commands against main, resulting in fatal: Not a valid object name main errors.

Steps to reproduce the issue

Just ask for a review. I tryed using Kimi 2.6, Qwen3.7 Max. Just happens with cmd. Works everytime with OpenCode.

Command Code Version

0.33.0

Operating System

Linux

Terminal/IDE

CLI

Shell

bash

Additional context

No response