The MCP tooling parses colibri-mcp / external MCP JSON-RPC output with jq, so
agent jails need it on PATH. Add jq to the pinned PKGS list (host must have it
in the pkg cache, like the other pinned packages). Mirrors the matching entry
in clawdie-iso pkg-list-jails.txt.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>