[Feature] Hooks Support (pre/post execution hooks)

[VascoSch92]

Summary

Add support for execution hooks that run before and after agent actions.

Feature Details (from OpenHands-CLI)

Hook Types

• pre_run - Execute before agent starts
• post_run - Execute after agent completes
• pre_commit - Execute before git commits (if applicable)
• post_commit - Execute after git commits

Configuration

Hooks defined in ~/.rho/hooks.json or .rho/hooks.json:

{
  "pre_run": ["echo Starting..."],
  "post_run": ["./scripts/cleanup.sh"],
  "pre_commit": ["cargo fmt", "cargo clippy"]
}

Hook Loading

• Load from user home directory (~/.rho/hooks.json)
• Override/extend with workspace hooks (.rho/hooks.json)
• Display loaded hooks in splash screen (see [Feature] Enhanced Splash Screen with Loaded Resources #40)
• Show in /skills command output (see [Feature] /skills Slash Command to View Loaded Resources #31)

Execution

• Run hooks in order
• Capture stdout/stderr
• Handle hook failures gracefully
• Timeout for long-running hooks

TUI Integration

• Show hook execution status
• Display hook output in messages
• Indicate if hooks are configured

Reference

See OpenHands SDK HookConfig.load() and OpenHands-CLI hook handling.

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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)