Function extract_context 

pub fn extract_context(
    command: &str,
    output: Option<&str>,
    cwd: &Path,
) -> GitContextUpdate

Extract all context from a Bash tool event.

Combines command parsing and output parsing to extract:

• GitHub repo, issue, and PR references
• Worktree path and branch
• Diff statistics (additions/deletions)

Arguments

• command - The Bash command (from event payload)
• output - The tool output (from event tool_output), if any
• cwd - Current working directory for resolving relative paths