Remove the docker module: dotfiles no longer installs Docker

Installing Docker Engine is a host/image decision, not a per-user
environment one. In Coder workspaces (unprivileged pods, no systemd) the
module ran get.docker.com on every start for a daemon that can never
run there. Where Docker is wanted, install it on the host or bake it
into the image.

Also drops the zshrc newgrp-docker hook that existed only for this
module's group change, and the docs/skills references to docker/.
docker-rootless-cgroup/ (configures Kasm's existing rootless daemon)
and bin/'s kind gate (detects a daemon) stay.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

.agents/skills/add-bootstrap-module/SKILL.md

@@ -44,9 +44,9 @@ Every module's `install.sh` satisfies all of these. Copy the shape from
 ## Wiring it up
 
 **`bootstrap.sh`** — add the call. Order is load-bearing and each existing
-out-of-order entry carries a comment explaining why (`docker/` before `bin/`
+out-of-order entry carries a comment explaining why (`secrets/` after `bin/`
-so kind's gate sees the daemon; `docker-rootless-cgroup/` last because it
+because it needs `op`; `docker-rootless-cgroup/` last because it needs the
-needs the rootless daemon already up). If your module has an ordering
+rootless daemon already up). If your module has an ordering
 constraint, add it *with* a comment; if it doesn't, append it near related
 modules.
 
@@ -61,7 +61,7 @@ Never commit the value itself.
 ## Non-systemd hosts
 
 Kasm has no systemd. Anything that would `systemctl enable` must degrade
-gracefully — see `docker/install.sh`, which detects the situation and no-ops
+gracefully — see `docker-rootless-cgroup/install.sh`, which detects the situation and no-ops
 rather than failing the whole bootstrap run.
 
 ## Before you're done

.agents/skills/bump-pinned-version/SKILL.md

@@ -14,7 +14,7 @@ Everything in this repo is version-pinned on purpose. Nothing floats.
 | CLI tools | `bin/install.sh` | `ver=v1.2.3` inside each `install_<name>()` |
 | Node.js | `node/install.sh` | `NODE_VERSION="v24.18.0"` |
 | MCP servers | `mcp-config/opencode.gateway.json` | `["npx", "-y", "pkg@0.0.10"]` |
-| oh-my-zsh, Docker | `zsh/`, `docker/` | installed from upstream scripts — not pinned |
+| oh-my-zsh | `zsh/` | installed from upstream script — not pinned |
 
 Grep before assuming: `grep -rnE 'ver=|_VERSION=|@[0-9]+\.[0-9]+' --include='*.sh' --include='*.json'`
 

.agents/skills/verify-module/SKILL.md

@@ -63,8 +63,8 @@ faithful rehearsal.
 
 Kasm has no systemd and no rootful Docker. Anything that would `systemctl` must
 no-op rather than abort — you can't fully rehearse this in a container, so read
-the code path and confirm the guard exists (`docker/install.sh` and
+the code path and confirm the guard exists (`docker-rootless-cgroup/install.sh`
-`docker-rootless-cgroup/install.sh` are the references).
+is the reference).
 
 ## Full run
 

README.md

@@ -32,14 +32,6 @@ Already have a clone? Just run it directly:
 - `git/` — sets git `user.name`/`user.email` and configures
   `credential.helper store` (plaintext `~/.git-credentials`, 0600) for
   HTTPS auth.
-- `docker/` — installs full (rootful) Docker Engine from Docker's upstream
-  package repo (get.docker.com on Debian-family; the docker-ce repo wired up
-  directly on RHEL-family, since the convenience script rejects EL rebuilds
-  like Oracle Linux by name), enables the service (systemd hosts), and adds
-  the invoking user to the
-  `docker` group (takes effect at next login). No-ops where a rootless
-  Docker daemon is already running (e.g. Kasm) so it never fights that
-  setup. Uses sudo.
 - `bin/` — installs userland devops CLIs as self-contained, statically
   linked release binaries into `~/.local/bin`: jq, kubectl, kubelogin (the
   `kubectl oidc-login` plugin, for OIDC auth to Omni clusters), helm, k9s,
@@ -50,6 +42,8 @@ Already have a clone? Just run it directly:
   coder CLI for Coder workspaces.
   kind is installed only when full (non-rootless) Docker is available —
   it doesn't work against rootless Docker, so it is skipped on Kasm.
+  Dotfiles does not install Docker itself; install it on the host (or bake
+  it into the image) where you want it.
   No sudo, nothing outside `$HOME`, so tools persist across Kasm
   redeploys with no reinstall. Idempotent: each tool records its version
   under `~/.local/bin/.versions` and is skipped when the pinned version

bootstrap.sh

@@ -66,7 +66,7 @@ fi
 #
 # WHY: these used to be bare calls, so under `set -eu` the FIRST failing module
 # aborted bootstrap and every later module silently never ran — one unsupported
-# distro in docker/ was enough to leave a box with no CLIs, no npx and no
+# distro in one module was enough to leave a box with no CLIs, no npx and no
 # ansible. The modules are independent, so a failure in one is not a reason to
 # skip the rest. (bin/install.sh does the same for individual tools; this is
 # that guard one level up.)
@@ -79,8 +79,6 @@ run_module() {
 
 run_module zsh
 run_module git
-# Runs before bin/ so the kind install gate can see the rootful daemon.
-run_module docker
 run_module bin
 # Needs op and jq from bin/. Runs before everything that consumes a secret, and
 # its output is loaded into THIS process so later modules see the vault's

docker/install.sh

@@ -1,114 +0,0 @@
-#!/usr/bin/env sh
-# docker/install.sh — install full (rootful) Docker Engine and let the
-# invoking user talk to it without sudo.
-#
-# What it does:
-#   1. Installs Docker Engine from Docker's upstream package repo. Skipped when
-#      `docker` is already installed. Debian-family hosts go through Docker's
-#      convenience script (get.docker.com); RHEL-family hosts wire up the
-#      docker-ce repo directly — see install_rhel() for why.
-#   2. Enables and starts the service (systemd hosts only).
-#   3. Adds the invoking user to the `docker` group so the daemon socket is
-#      usable without sudo. Takes effect at next login.
-#
-# Deliberately no-ops when a rootless Docker daemon is detected (e.g. Kasm
-# ships its own rootless setup) — installing rootful Docker there would fight
-# the existing runtime. See docker-rootless-cgroup/ for the Kasm-side config.
-#
-# Idempotent and safe to re-run. Uses sudo.
-set -eu
-
-SCRIPT_DIR="$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)"
-REPO_ROOT="$(dirname -- "$SCRIPT_DIR")"
-
-# shellcheck source=../lib/os-detect.sh
-. "$REPO_ROOT/lib/os-detect.sh"
-
-say() { printf '%s\n' "$*" >&2; }
-
-DOCKER_PKGS="docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin"
-
-# install_rhel — install docker-ce from Docker's EL repo.
-#
-# WHY NOT get.docker.com: the convenience script allowlists distros by
-# /etc/os-release ID and aborts on anything it does not recognize —
-# "ERROR: Unsupported distribution 'ol'" on Oracle Linux, and the same for
-# other EL rebuilds it has not enumerated. On a match it does nothing more
-# than what this function does: add the repo, then install the packages.
-# Wiring the repo up directly drops the allowlist, so every EL rebuild
-# (Oracle, Rocky, Alma, CentOS, RHEL) installs from one code path.
-#
-# The repo URL is keyed on $releasever/$basearch, which dnf expands per host,
-# so EL9 and EL10 both resolve without a version table here.
-install_rhel() {
-  say "docker: adding Docker CE repo (EL \$releasever/\$basearch)..."
-  sudo tee /etc/yum.repos.d/docker-ce.repo >/dev/null <<'REPO'
-[docker-ce-stable]
-name=Docker CE Stable - $basearch
-baseurl=https://download.docker.com/linux/centos/$releasever/$basearch/stable
-enabled=1
-gpgcheck=1
-gpgkey=https://download.docker.com/linux/centos/gpg
-REPO
-  # --allowerasing: containerd.io conflicts with the distro's own runc/containerd
-  # on EL rebuilds that ship them (Oracle Linux does). Let dnf swap them out
-  # rather than dead-end on the conflict.
-  if command -v dnf >/dev/null 2>&1; then
-    # shellcheck disable=SC2086
-    sudo dnf install -y --allowerasing $DOCKER_PKGS
-  else
-    # shellcheck disable=SC2086
-    sudo yum install -y --allowerasing $DOCKER_PKGS
-  fi
-}
-
-# install_debian — Docker's convenience script; it supports every Debian-family
-# distro this repo targets and sets up the apt repo and keyring.
-install_debian() {
-  say "docker: installing Docker Engine via get.docker.com..."
-  tmp="$(mktemp)"
-  if command -v curl >/dev/null 2>&1; then
-    curl -fsSL https://get.docker.com -o "$tmp"
-  elif command -v wget >/dev/null 2>&1; then
-    wget -qO "$tmp" https://get.docker.com
-  else
-    say "docker: need curl or wget"; rm -f "$tmp"; return 1
-  fi
-  sudo sh "$tmp"
-  rm -f "$tmp"
-}
-
-# --- skip on rootless-Docker hosts -------------------------------------------
-if command -v docker >/dev/null 2>&1 &&
-   docker info -f '{{println .SecurityOptions}}' 2>/dev/null | grep -q 'name=rootless'; then
-  say "docker: rootless Docker daemon detected; leaving it alone."
-  exit 0
-fi
-
-# --- 1. install engine -------------------------------------------------------
-if command -v docker >/dev/null 2>&1; then
-  say "docker: engine already installed ($(docker --version 2>/dev/null || echo 'version unknown'))."
-else
-  case "$(detect_pkg_family)" in
-    rhel)   install_rhel ;;
-    debian) install_debian ;;
-    *)      say "docker: unsupported/undetected OS family; install Docker manually."; exit 1 ;;
-  esac
-fi
-
-# --- 2. enable + start the service (systemd only) ----------------------------
-if [ -d /run/systemd/system ] && command -v systemctl >/dev/null 2>&1; then
-  sudo systemctl enable --now docker
-else
-  say "docker: no systemd; not managing the service (start dockerd yourself)."
-fi
-
-# --- 3. group membership for the invoking user -------------------------------
-user="$(id -un)"
-if id -nG "$user" | tr ' ' '\n' | grep -qx docker; then
-  say "docker: $user already in the docker group."
-else
-  sudo usermod -aG docker "$user"
-  say "docker: added $user to the docker group."
-  say "  Log out and back in (or run 'newgrp docker') for it to take effect."
-fi

zsh/zshrc

@@ -2,19 +2,6 @@
 # overwritten on the next bootstrap run. Edit zsh/zshrc in the dotfiles repo
 # instead.
 
-# If this account was added to the docker group (dotfiles/docker/install.sh)
-# but this shell's session predates that, re-exec via newgrp so docker works
-# without a full logout. Guarded: fires only when the group is on the account
-# yet missing from the running shell's groups, so the newgrp'd shell (which
-# has the group) cannot loop.
-# Only for real terminals ([ -t 0 ]): newgrp replaces the shell and would
-# swallow the command in scripted `zsh -i -c ...` invocations.
-if [ -t 0 ] && [ -S /var/run/docker.sock ] \
-   && id -nG "${USER:-$(id -un)}" 2>/dev/null | grep -qw docker \
-   && ! id -Gn 2>/dev/null | grep -qw docker; then
-  exec newgrp docker
-fi
-
 # Userland tools installed by dotfiles/bin/install.sh live here.
 case ":$PATH:" in
   *":$HOME/.local/bin:"*) ;;