remote-compilation-helper-setup

name	remote-compilation-helper-setup
description	Configure RCH workers, install hooks, fix SSH/daemon issues. Use when setting up remote compilation, adding build machines, troubleshooting rch doctor, or "no workers available".

RCH Setup

Offloads cargo build, bun test, gcc to remote workers. Transparent—same commands, faster builds.

Workflow

1. rch doctor           # What's broken?
2. rch doctor --fix     # Auto-fix common issues
3. rch doctor           # All green? Done.

If --fix can't solve it, continue below.

Setup Checklist

• Prerequisites: which rustup rsync zstd (install missing)
• Install: cargo install --path rch (or --path . from repo root)
• Configure: Create ~/.config/rch/workers.toml (see below)
• Hook: rch hook install
• Daemon: rchd & or systemctl --user start rchd
• Validate: rch doctor → all checks pass

Worker Config

# ~/.config/rch/workers.toml
[[workers]]
id = "worker1"
host = "192.168.1.100"
user = "ubuntu"
identity_file = "~/.ssh/id_ed25519"
total_slots = 8    # ≈ CPU cores - 2
priority = 100     # Higher = preferred
tags = ["rust"]    # Optional capability tags

Discover from SSH config:

rch workers discover --from-ssh-config --dry-run  # Preview
rch workers discover --from-ssh-config            # Add to config

Verify workers:

rch workers probe worker1 --verbose  # Test single
rch workers probe --all              # Test all
rch workers list --capabilities      # Show detected toolchains

Quick Fixes

Symptom	Fix
SSH fails	eval $(ssh-agent) && ssh-add ~/.ssh/your_key
Daemon down	rm -f /tmp/rch.sock && rchd &
Hook missing	rch hook install --force
No workers	Check config path, SSH connectivity

Test hook directly:

echo '{"tool":"Bash","input":{"command":"cargo check"}}' | rch hook
# Expect: {"allow":true,"output":"..."}

Validation

rch doctor --verbose   # Full diagnostics
rch doctor --json      # Machine-readable
RCH_DRY_RUN=1 cargo check  # Test without remote execution

⚠️ All rch doctor checks must pass before use.

References

Topic	Reference
Worker schema, selection algorithm, tags	WORKERS.md
All error messages & detailed fixes	TROUBLESHOOTING.md
Hook protocol, 5-tier classification	HOOKS.md