diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..fc50074
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,14 @@
+name: ci
+on:
+  push:
+    branches: [main]
+  pull_request:
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: shellcheck
+        run: shellcheck install.sh bin/rig commands/*.sh test/cli.sh
+      - name: cli tests
+        run: bash test/cli.sh
diff --git a/README.md b/README.md
index 18d5cf3..c3ff72d 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,73 @@
-# deployor
-Box-plumbing CLI: curl-install on a pristine Debian server, bootstrap it into a hardened tailnet-joined node
+# rig
+
+A CLI that turns a **pristine Debian server into a hardened, tailnet-joined
+node** — one curl, one command. A second command installs a version-pinned
+Coolify on a control-plane box.
+
+Philosophy (shared with [claudebox](https://github.com/heavy-duty/claudebox)):
+**public tool, private state**. rig carries plumbing logic only — no
+hostnames, no bindings, no secrets, nothing about *your* infrastructure. It
+takes arguments, does its work, and stores no credential, ever.
+
+## Install
+
+```sh
+curl -fsSL https://raw.githubusercontent.com/heavy-duty/rig/main/install.sh | bash
+```
+
+Installs the tree to `~/.local/share/rig` and links `rig` onto your
+PATH (`/usr/local/bin` when root). Re-run any time to upgrade.
+
+## Commands
+
+### `rig bootstrap <control-plane|workload>`
+
+Run as root on the fresh box (over SSH). Convergent — safe to re-run; a
+second run changes nothing.
+
+```sh
+rig bootstrap control-plane --hostname my-coolify-box
+rig bootstrap workload --hostname my-prod-box
+```
+
+- `--hostname <name>` — tailnet hostname (default: the role name)
+- `--ts-tag <tag>` — tailnet tag to advertise (default: `tag:server`)
+
+What it does: installs `curl ca-certificates unattended-upgrades` (and
+enables periodic unattended upgrades); writes an sshd hardening drop-in
+(`PermitRootLogin prohibit-password`, `PasswordAuthentication no`); installs
+tailscale and joins your tailnet.
+
+**The pre-auth key:** provide it via the `TS_AUTHKEY` env var or type it at
+the interactive prompt. Use a **single-use, tagged, short-expiry** key. It
+lives in process memory only — rig never writes a credential to disk.
+
+The two roles are identical today except the default hostname; they exist
+because control-plane and workload boxes diverge over time, and because the
+next command applies to exactly one of them.
+
+### `rig coolify install --version <pin>`
+
+Control-plane box only. Installs Coolify at exactly the pinned version with
+`AUTOUPDATE=false` — your deploy tooling is verified against an API surface;
+the platform must never move underneath it on its own. Upgrading is an
+explicit re-run with a new pin. The pin is required; there is no default.
+
+## What rig deliberately does NOT do
+
+- **Provider firewalls** — Docker publishes ports past host firewalls, so
+  the real boundary is your cloud provider's firewall, configured outside
+  this tool.
+- **Fetch your config** — boxes never receive repo credentials. Everything
+  rig needs arrives as arguments or an interactive prompt.
+- **Manage deployments** — deploy manifests/executors are separate concerns.
+  (Planned: the `apply`/`diff` executor half joins rig as commands that
+  run on operator machines, never on boxes.)
+
+## Testing
+
+`bash test/cli.sh` (dependency-free assertions) + shellcheck run in CI. The
+end-to-end rehearsal is a throwaway VM/container: pristine Debian → install →
+`bootstrap workload` with a real single-use key → assert the sshd drop-in,
+tailnet join, and a no-op second run → destroy, remove the node from the
+tailnet.
diff --git a/bin/rig b/bin/rig
new file mode 100755
index 0000000..286ab12
--- /dev/null
+++ b/bin/rig
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")/.." && pwd)"
+
+usage() {
+  cat <<'EOF'
+usage: rig <command> [args]
+
+commands:
+  bootstrap <control-plane|workload> [--hostname <name>] [--ts-tag <tag>]
+      OS plumbing on a pristine Debian box: hardening, unattended-upgrades,
+      tailscale join. Prompts for a single-use tailnet pre-auth key
+      (TS_AUTHKEY env overrides the prompt). Run as root.
+  coolify install --version <pin>
+      Pinned Coolify install (AUTOUPDATE=false). Control-plane box only.
+
+install/upgrade:
+  curl -fsSL https://raw.githubusercontent.com/heavy-duty/rig/main/install.sh | bash
+EOF
+}
+
+cmd="${1:-}"
+case "$cmd" in
+  bootstrap)
+    shift
+    exec "$ROOT/commands/bootstrap.sh" "$@"
+    ;;
+  coolify)
+    shift
+    sub="${1:-}"
+    if [ "$sub" != "install" ]; then
+      usage >&2
+      exit 2
+    fi
+    shift
+    exec "$ROOT/commands/coolify-install.sh" "$@"
+    ;;
+  -h|--help|help)
+    usage
+    exit 0
+    ;;
+  "")
+    usage >&2
+    exit 2
+    ;;
+  *)
+    printf 'rig: unknown command: %s\n' "$cmd" >&2
+    usage >&2
+    exit 2
+    ;;
+esac
diff --git a/commands/bootstrap.sh b/commands/bootstrap.sh
new file mode 100755
index 0000000..4b82fc5
--- /dev/null
+++ b/commands/bootstrap.sh
@@ -0,0 +1,108 @@
+#!/usr/bin/env bash
+# rig bootstrap — OS plumbing for a pristine Debian box.
+# Convergent: safe to re-run; a second run changes nothing.
+set -euo pipefail
+
+log()  { printf 'rig-bootstrap: %s\n' "$*"; }
+warn() { printf 'rig-bootstrap: WARNING: %s\n' "$*" >&2; }
+die()  { printf 'rig-bootstrap: ERROR: %s\n' "$1" >&2; exit "${2:-1}"; }
+
+usage() {
+  cat <<'EOF'
+usage: rig bootstrap <control-plane|workload> [--hostname <name>] [--ts-tag <tag>]
+
+  --hostname  tailnet hostname (default: the role name)
+  --ts-tag    tailnet tag to advertise (default: tag:server)
+
+Provide the single-use tailscale pre-auth key via the TS_AUTHKEY env var, or
+enter it at the interactive prompt. It is used once and never written to disk.
+EOF
+}
+
+# --- args (validated before the root check, so errors are testable) ---------
+ROLE="${1:-}"
+case "$ROLE" in
+  control-plane|workload) shift ;;
+  -h|--help) usage; exit 0 ;;
+  "") usage >&2; die "role required (control-plane|workload)" 2 ;;
+  *) die "unknown role: $ROLE (want control-plane|workload)" 2 ;;
+esac
+
+TS_HOSTNAME="$ROLE"
+TS_TAG="tag:server"
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --hostname)
+      [ $# -ge 2 ] || die "--hostname needs a value" 2
+      TS_HOSTNAME="$2"; shift 2 ;;
+    --ts-tag)
+      [ $# -ge 2 ] || die "--ts-tag needs a value" 2
+      TS_TAG="$2"; shift 2 ;;
+    *) die "unknown flag: $1" 2 ;;
+  esac
+done
+
+# --- guards ------------------------------------------------------------------
+[ "$(id -u)" -eq 0 ] || die "must run as root"
+if [ -r /etc/os-release ]; then
+  # shellcheck source=/dev/null
+  . /etc/os-release
+  case "${ID:-} ${ID_LIKE:-}" in
+    *debian*) ;;
+    *) warn "not a Debian-family system (ID=${ID:-unknown}); proceeding anyway" ;;
+  esac
+else
+  warn "cannot read /etc/os-release; proceeding anyway"
+fi
+
+# --- pre-auth key (env override, else prompt; never touches disk) ------------
+if [ -z "${TS_AUTHKEY:-}" ]; then
+  read -rsp "tailscale pre-auth key (single-use, tagged, <=1h expiry): " TS_AUTHKEY
+  echo
+fi
+[ -n "$TS_AUTHKEY" ] || die "empty pre-auth key"
+
+# --- packages ----------------------------------------------------------------
+export DEBIAN_FRONTEND=noninteractive
+log "installing base packages"
+apt-get update -qq
+apt-get install -y -qq curl ca-certificates unattended-upgrades
+
+# enable periodic unattended upgrades (canonical file; idempotent overwrite)
+cat > /etc/apt/apt.conf.d/20auto-upgrades <<'EOF'
+APT::Periodic::Update-Package-Lists "1";
+APT::Periodic::Unattended-Upgrade "1";
+EOF
+
+# --- sshd hardening (restart only when the drop-in actually changed) ---------
+DROPIN=/etc/ssh/sshd_config.d/99-rig.conf
+TMP="$(mktemp)"
+cat > "$TMP" <<'EOF'
+PermitRootLogin prohibit-password
+PasswordAuthentication no
+EOF
+if ! cmp -s "$TMP" "$DROPIN" 2>/dev/null; then
+  install -m 0644 "$TMP" "$DROPIN"
+  systemctl restart ssh
+  log "sshd hardening drop-in installed"
+else
+  log "sshd hardening drop-in already in place"
+fi
+rm -f "$TMP"
+
+# --- tailscale ----------------------------------------------------------------
+if ! command -v tailscale >/dev/null 2>&1; then
+  log "installing tailscale"
+  curl -fsSL https://tailscale.com/install.sh | sh
+fi
+if tailscale status >/dev/null 2>&1; then
+  log "tailnet already joined; skipping tailscale up"
+else
+  log "joining tailnet as ${TS_HOSTNAME} (${TS_TAG})"
+  tailscale up --authkey="$TS_AUTHKEY" --hostname="$TS_HOSTNAME" --advertise-tags="$TS_TAG"
+fi
+
+log "done — role ${ROLE}, hostname ${TS_HOSTNAME}"
+if [ "$ROLE" = "control-plane" ]; then
+  log "next: rig coolify install --version <pin>"
+fi
diff --git a/commands/coolify-install.sh b/commands/coolify-install.sh
new file mode 100755
index 0000000..4e6d915
--- /dev/null
+++ b/commands/coolify-install.sh
@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+# rig coolify install — pinned Coolify install; AUTOUPDATE=false so the
+# platform never self-updates underneath its operators. Upgrades are an
+# explicit act.
+set -euo pipefail
+
+log() { printf 'rig-coolify: %s\n' "$*"; }
+die() { printf 'rig-coolify: ERROR: %s\n' "$1" >&2; exit "${2:-1}"; }
+
+usage() {
+  cat <<'EOF'
+usage: rig coolify install --version <pin>
+
+Installs Coolify at exactly <pin> (e.g. 4.1.2) with AUTOUPDATE=false.
+Control-plane box only. The version pin is required — you state the floor
+your tooling is verified against; there is no default.
+EOF
+}
+
+VERSION=""
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --version)
+      [ $# -ge 2 ] || die "--version needs a value" 2
+      VERSION="$2"; shift 2 ;;
+    -h|--help) usage; exit 0 ;;
+    *) die "unknown flag: $1" 2 ;;
+  esac
+done
+if [ -z "$VERSION" ]; then
+  usage >&2
+  die "--version <pin> is required" 2
+fi
+
+[ "$(id -u)" -eq 0 ] || die "must run as root"
+
+export AUTOUPDATE=false
+log "installing coolify ${VERSION} (AUTOUPDATE=false)"
+curl -fsSL https://cdn.coollabs.io/coolify/install.sh -o /tmp/coolify-install.sh
+bash /tmp/coolify-install.sh "$VERSION"
+log "coolify ${VERSION} installed with AUTOUPDATE=false"
+log "next: your bootstrap runbook (admin user, API token, GitHub App, S3 destination)"
diff --git a/install.sh b/install.sh
new file mode 100644
index 0000000..e10f9db
--- /dev/null
+++ b/install.sh
@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# rig installer — intended for: curl -fsSL .../install.sh | bash
+#
+# Downloads the rig repo tarball, installs the whole tree under $DEST,
+# and puts a `rig` symlink on PATH via $BINDIR. Re-run any time to
+# upgrade.
+
+REPO="${RIG_REPO:-heavy-duty/rig}"
+REF="${RIG_REF:-main}"
+DEST="${RIG_HOME:-$HOME/.local/share/rig}"
+if [ "$(id -u)" -eq 0 ]; then
+  BINDIR="${RIG_BIN:-/usr/local/bin}"
+else
+  BINDIR="${RIG_BIN:-$HOME/.local/bin}"
+fi
+
+log() { printf 'rig-install: %s\n' "$*"; }
+warn() { printf 'rig-install: WARNING: %s\n' "$*" >&2; }
+die() { printf 'rig-install: ERROR: %s\n' "$*" >&2; exit 1; }
+
+# --- prerequisites -----------------------------------------------------------
+command -v curl >/dev/null 2>&1 || die "curl is required but was not found."
+command -v tar  >/dev/null 2>&1 || die "tar is required but was not found."
+
+# --- temp workspace ----------------------------------------------------------
+TMPDIR="$(mktemp -d)"
+cleanup() { rm -rf "$TMPDIR"; }
+trap cleanup EXIT
+
+URL="https://github.com/$REPO/archive/refs/heads/$REF.tar.gz"
+
+log "installing rig ($REPO@$REF)"
+log "downloading $URL"
+curl -fsSL "$URL" -o "$TMPDIR/rig.tar.gz" \
+  || die "failed to download $URL"
+
+log "extracting archive"
+tar -xzf "$TMPDIR/rig.tar.gz" -C "$TMPDIR" \
+  || die "failed to extract archive"
+
+# GitHub archives extract to a single top-level dir like rig-<ref>/
+EXTRACTED="$(find "$TMPDIR" -maxdepth 1 -type d -name 'rig-*' | head -n1)"
+[ -n "$EXTRACTED" ] || die "could not find extracted rig-* directory in archive"
+[ -f "$EXTRACTED/bin/rig" ] || die "archive does not contain bin/rig — is $REPO@$REF correct?"
+
+# --- atomically replace $DEST --------------------------------------------------
+log "installing into $DEST"
+rm -rf "$DEST"
+mkdir -p "$(dirname "$DEST")"
+mv "$EXTRACTED" "$DEST"
+
+chmod +x "$DEST/bin/rig" "$DEST"/commands/*.sh
+
+# --- put rig on PATH ------------------------------------------------------
+mkdir -p "$BINDIR"
+ln -sf "$DEST/bin/rig" "$BINDIR/rig"
+log "linked $BINDIR/rig -> $DEST/bin/rig"
+
+# --- PATH check ----------------------------------------------------------------
+case ":$PATH:" in
+  *":$BINDIR:"*) : ;;
+  *)
+    warn "$BINDIR is not on your PATH."
+    warn "  add: export PATH=\"$BINDIR:\$PATH\""
+    ;;
+esac
+
+log "done — try: rig --help"
diff --git a/test/cli.sh b/test/cli.sh
new file mode 100644
index 0000000..df81a0f
--- /dev/null
+++ b/test/cli.sh
@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+# Dependency-free CLI assertions. Run: bash test/cli.sh
+# Deliberately no `set -e` — the harness asserts on failing commands.
+set -u
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+PASS=0 FAIL=0
+
+# check <desc> <want_exit> <want_substr> <cmd...>
+# Runs cmd, asserts exit code and (if non-empty) that combined output
+# contains want_substr.
+check() {
+  local desc="$1" want="$2" substr="$3"; shift 3
+  local out rc
+  out="$("$@" 2>&1)"; rc=$?
+  if [ "$rc" -ne "$want" ]; then
+    echo "FAIL: $desc — exit $rc, wanted $want"
+    printf '%s\n' "$out" | sed 's/^/    /'
+    FAIL=$((FAIL + 1)); return
+  fi
+  if [ -n "$substr" ] && ! printf '%s' "$out" | grep -qF -e "$substr"; then
+    echo "FAIL: $desc — output missing '$substr'"
+    printf '%s\n' "$out" | sed 's/^/    /'
+    FAIL=$((FAIL + 1)); return
+  fi
+  echo "ok: $desc"; PASS=$((PASS + 1))
+}
+
+check "no args shows usage, exit 2"      2 "usage:" "$ROOT/bin/rig"
+check "--help exits 0"                   0 "usage:" "$ROOT/bin/rig" --help
+check "help exits 0"                     0 "usage:" "$ROOT/bin/rig" help
+check "unknown command exits 2"          2 "unknown command" "$ROOT/bin/rig" frobnicate
+check "bare coolify shows usage, exit 2" 2 "usage:" "$ROOT/bin/rig" coolify
+
+check "bootstrap: role required, exit 2"   2 "role required"  "$ROOT/commands/bootstrap.sh"
+check "bootstrap: --help exits 0"          0 "usage:"         "$ROOT/commands/bootstrap.sh" --help
+check "bootstrap: unknown role exits 2"    2 "unknown role"   "$ROOT/commands/bootstrap.sh" potato
+check "bootstrap: unknown flag exits 2"    2 "unknown flag"   "$ROOT/commands/bootstrap.sh" workload --nope
+check "bootstrap: hostname needs value"    2 "needs a value"  "$ROOT/commands/bootstrap.sh" workload --hostname
+if [ "$(id -u)" -ne 0 ]; then
+  check "bootstrap: refuses non-root"      1 "must run as root" env TS_AUTHKEY=x "$ROOT/commands/bootstrap.sh" workload
+else
+  echo "skip: bootstrap non-root refusal (running as root)"
+fi
+
+check "coolify: version required, exit 2"  2 "--version"      "$ROOT/commands/coolify-install.sh"
+check "coolify: --help exits 0"            0 "usage:"         "$ROOT/commands/coolify-install.sh" --help
+check "coolify: version needs value"       2 "needs a value"  "$ROOT/commands/coolify-install.sh" --version
+check "coolify: unknown flag exits 2"      2 "unknown flag"   "$ROOT/commands/coolify-install.sh" --nope
+if [ "$(id -u)" -ne 0 ]; then
+  check "coolify: refuses non-root"        1 "must run as root" "$ROOT/commands/coolify-install.sh" --version 4.1.2
+else
+  echo "skip: coolify non-root refusal (running as root)"
+fi
+
+echo "---"
+echo "$PASS passed, $FAIL failed"
+[ "$FAIL" -eq 0 ]