Function execute_hook 

pub fn execute_hook(
    event: HookEvent,
    unit: &Unit,
    project_dir: &Path,
    reason: Option<String>,
) -> Result<bool, Error>

Execute a hook script with the given payload.

Arguments

• event - The hook event to trigger
• unit - The unit to pass to the hook
• project_dir - The project root directory (parent of .mana/)
• reason - Optional reason (used for pre-close hooks)

Returns

• Ok(true) - Hook passed (exit 0), or hook doesn’t exist, or hooks not trusted
• Ok(false) - Hook executed but returned non-zero exit code
• Err - Hook exists but not executable, timeout, or I/O error