- Add `conn shell` CLI subcommand for spawning local interactive shells with AI Copilot support.
- Implement `protocol="local"` on core `node` class with PTY process spawning, dynamic PWD tracking (/proc/PID/cwd + OSC 7), and AI metadata mapping.
- Implement `_is_child_connpy_active()` to inspect PTY slave foreground process group (tcgetpgrp + /proc/PGID/cmdline).
- Automatically pass `Ctrl+Space` (b'\x00') down to child foreground `conn` / `connpy` processes when running nested sessions in local shell.
- Add `--shell-command`, `--shell-prompt`, and `--shell-os` configuration options to `conn config`.
- Update `README.md` and `connpy/__init__.py` documentation to include `conn shell` and PAT API Token management.
- Add comprehensive unit tests in `test_local_shell.py` and `test_completion.py`.
- Bump version to v6.1.0 and regenerate full HTML documentation in `docs/` via pdoc.