add `go tool cue` and `xargs` as allowed Claude commands
And tell the agent to prefer adding to existing txtar testdata files,
as it often jumps directly to creating a new file.
Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
Change-Id: Ib5714051639f0388be5b736daf918fa42b0d06a3
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1230703
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>
Reviewed-by: Matthew Sackman <matthew@cue.works>
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>