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Adds a `unix_utils` tool to the local tools crate, giving the assistant access to a curated set of common unix utilities: `base64`, `bc`, `date`, `file`, `head`, `jq`, `shasum`, `sort`, `tail`, `uname`, `uniq`, `uuidgen`, and `wc`. Each invocation goes through two layers of security. First, argument validation scans every argument — both whole and split on common delimiters — for path references outside the workspace root, rejecting tilde home expansions, `..` traversals, and absolute paths to existing system files. Second, on macOS, the subprocess runs inside a `sandbox-exec` Seatbelt profile that is deny-default: only the workspace root, the binary's symlink chain, its shared library directories, and a small set of per-util extras (e.g. timezone data for `date`) are allowed. Writes and network access are denied. The tool is wired into the `dev` persona via a new `unix` skill, and a corresponding tool definition is added under `.jp/mcp/tools/unix/utils.toml`. Signed-off-by: Jean Mertz <git@jeanmertz.com>
Signed-off-by: Jean Mertz <git@jeanmertz.com>
Signed-off-by: Jean Mertz <git@jeanmertz.com>
Signed-off-by: Jean Mertz <git@jeanmertz.com>
Signed-off-by: Jean Mertz <git@jeanmertz.com>
Signed-off-by: Jean Mertz <git@jeanmertz.com>
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Adds a
unix_utilstool to the local tools crate, giving the assistant access to a curated set of common unix utilities:base64,bc,date,file,head,jq,shasum,sort,tail,uname,uniq,uuidgen, andwc.Each invocation goes through two layers of security. First, argument validation scans every argument — both whole and split on common delimiters — for path references outside the workspace root, rejecting tilde home expansions,
..traversals, and absolute paths to existing system files. Second, on macOS, the subprocess runs inside asandbox-execSeatbelt profile that is deny-default: only the workspace root, the binary's symlink chain, its shared library directories, and a small set of per-util extras (e.g. timezone data fordate) are allowed. Writes and network access are denied.The tool is wired into the
devpersona via a newunixskill, and a corresponding tool definition is added under.jp/mcp/tools/unix/utils.toml.