Part of hooks/ — see also src/hooks/ for installation code

• Uses the rtk hook copilot Rust binary (not a shell script) -- no jq dependency
• Auto-detects two input formats: VS Code Copilot Chat (snake_case tool_name/tool_input) and Copilot CLI (camelCase toolName/toolArgs with JSON-stringified args)
• VS Code format: returns updatedInput for transparent rewrite
• Copilot CLI format: returns permissionDecision: "deny" with suggestion (Copilot CLI API doesn't support updatedInput)

bash hooks/test-copilot-rtk-rewrite.sh