[Feature] Persistent Settings Storage

[VascoSch92]

Summary

Add persistent configuration storage to save user preferences between sessions.

Feature Details (from OpenHands-CLI)

Configuration Files

Store in ~/.rho/ directory:

• agent_settings.toml - LLM provider, model, API keys, base URL
• cli_config.toml - TUI preferences (theme, default cells expanded, etc.)
• mcp.toml - MCP server configurations (see [Feature] MCP (Model Context Protocol) Integration #19)

Agent Settings

[llm]
provider = "anthropic"
model = "claude-sonnet-4-5-20250929"
api_key = "sk-..."  # Or reference env var
base_url = ""  # Optional for custom endpoints

[agent]
timeout = 300
max_tokens = 4096

CLI Settings

[ui]
theme = "rho"
default_cells_expanded = false
auto_open_plan_panel = true

[confirmation]
default_policy = "always-confirm"

[critic]
enable_critic = true
enable_iterative_refinement = false
critic_threshold = 0.6

First-Run Wizard

• Detect first run (no config files exist)
• Guide user through initial setup
• Configure LLM provider and API key
• Save settings for future sessions

Settings Migration

• Handle legacy config formats
• Migrate old settings to new structure
• Version config files for future migrations

CLI Flag

• --override-with-envs - Ignore stored settings, use environment variables

Reference

See OpenHands-CLI:

• openhands_cli/stores/agent_store.py
• openhands_cli/stores/cli_settings.py
• openhands_cli/locations.py

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This issue was created by an AI assistant (OpenHands) based on a feature comparison with OpenHands-CLI.

[VascoSch92]

📋 Tracked in: #18 (Feature Parity with OpenHands-CLI)