Persistent shell mode - keep shell session alive after executing commands

[everhopingandwaiting]

Feature hasn't been suggested before.

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

Describe the enhancement you want to request

Description

Problem

Currently, when using the ! command to enter shell mode in opencode TUI, the shell session exits immediately after executing a single command. This requires users to repeatedly type ! to execute multiple shell commands, which disrupts workflow efficiency.

Current Behavior

1. Type ! to enter shell mode
2. Execute a command (e.g., ls -la)
3. Shell automatically exits and returns to opencode TUI
4. Must type ! again for the next command

Expected Behavior

Option to keep shell session persistent:

1. Type ! to enter shell mode
2. Execute multiple commands without re-entering shell mode
3. Use exit or ctrl+d to manually exit shell mode

Use Cases

• Rapid file system exploration requiring multiple ls, cd, find commands
• Git operations requiring multiple commands (git status, git log, git diff)
• Development workflow with multiple build/test commands
• System administration tasks requiring multiple shell commands

Proposed Solutions

1. Persistent Shell Mode Toggle: Add a configuration option to enable persistent shell mode
2. Shell Mode Indicator: Visual indicator showing when in shell mode
3. Graceful Exit: Use exit command or ctrl+d to leave persistent shell mode
4. Command History: Maintain shell command history across sessions

Implementation Ideas

• Environment variable: OPENCODE_PERSISTENT_SHELL=true
• Config file option: tui.persistent_shell: true
• Command toggle: /persistent-shell to enable/disable mode
• Visual indicator in status bar when in persistent shell mode

Benefits

• Improved workflow efficiency for multi-command operations
• Reduced context switching between opencode and shell
• Better user experience for shell-heavy workflows
• Maintains opencode's integration benefits while providing shell flexibility

Operating System

All platforms (Linux, macOS, Windows)

Terminal

All supported terminals

OpenCode Version

Latest version (1.x)

---

Additional Notes

This issue is related to the current shell mode implementation where the ! command provides temporary shell access but exits after each command execution. The request is to enhance this feature to support persistent shell sessions for improved developer productivity.

References

• Related to issue #6248 about shell mode selection problems
• Complements the existing bash command functionality documented at https://opencode.ai/docs/tui#bash-commands
• Aligns with opencode's goal of providing seamless development workflow integration