Execute a Linux/bash-style command on this Windows machine.

Commands are deterministically translated to PowerShell and executed natively — no WSL or VM. Output is formatted to look like GNU/Linux tooling (ls -l, ps aux, df -h ...), errors look like bash errors, and text encoding (UTF-8/GBK) is handled automatically.

Supported: pipes (|), && / || / ;, redirections (> >> 2> 2>&1 < /dev/null), variables ($VAR $HOME ~), command substitution $(...), and 108+ coreutils-style commands (., :, [, [[, alias, awk, base64, basename, cat, cd, chmod, chown, clear, command, cp, curl, cut, date...). Unknown commands (git, node, npm, python, cargo...) are passed through and executed natively with argv-style quoting. Not supported: heredocs, while/until/case, env -i/--ignore-environment, background jobs. if/then/elif/else/fi, for-in loops, and word-level $((...)) arithmetic expansion are supported.

CWD, environment variables, export/unset and cd persist across calls within this session — a resident PowerShell 5.1 host is started when the MCP session begins (and after reset), so the first bash tool call is already warm. Exit codes follow bash conventions (0 ok, 1 fail, 2 usage/serious, 127 command not found, 124 timeout, 130 cancelled). The tool also returns structuredContent (schemaVersion 1) with stdout/stderr/exitCode/timedOut/cancelled/truncated/sessionId.

Platform requirement: the execution backend is native Windows PowerShell 5.1+. On hosts without PowerShell on PATH (e.g. Linux containers/sandboxes), the bash tool returns exit code 127 with an actionable error instead of running the command.

Translate a bash-style command into the equivalent PowerShell script WITHOUT executing it. Useful for learning/debugging what fauxnix does under the hood.

Inspect or reset the persistent fauxnix shell session (current directory, environment, session id). Actions: "status" (default) or "reset".