RCH — Remote Compilation Helper

Use this skill for remote compilation offload, worker fleet health checks, and hook incident recovery.

Quick Start

rch check
rch status --workers --jobs
rch workers probe --all
rch hook status
rch diagnose --dry-run "cargo check --workspace --all-targets"
rch exec -- env CARGO_TARGET_DIR=${TMPDIR:-/tmp}/rch_target_<name> cargo check --workspace --all-targets

IMPORTANT: Always use ${TMPDIR:-/tmp} for target dirs, never hardcode /tmp or /var/tmp. On fleet machines TMPDIR=/data/tmp (disk-backed). Hardcoding /tmp wastes tmpfs RAM; /var/tmp survives reboots and accumulates silently.

If rch exec -- ... succeeds, remote offload is healthy and remaining failures are likely project/toolchain specific.