claude edit-hook refuses to run when spawned inside a Claude Code session

The claude edit-hook command, used internally by the VS Code extension to apply a single JSON-formatted edit read from standard input, now checks the CLAUDE_CODE_CHILD_SESSION environment variable. If that variable is set, meaning the command was spawned by Claude Code itself rather than run directly, it logs a telemetry event and returns a refusal message instead of reading and applying the edit.