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skills/scripts/hub.sh
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#!/usr/bin/env bash
# Usage: hub.sh install | check | pin <blob> | runner | hook
# install copy hub/ to ~/.local/share/kvb-hub, write its .env, build and
# start the container, register the MCP server for Claude Code
# check image imports, container, logs, HTTP, pinned keys, hook, runner,
# disk; exit 1 when a check fails
# pin pin the credential blob the hub's "Passkey registrieren" shows
# runner install, enable and restart the runner user service
# hook register the PermissionRequest hook in ~/.claude/settings.json,
# replacing an earlier kvb-hub entry, keeping everything else and the
# file mode, after a copy to settings.json.before-kvb-hub-hook
set -euo pipefail
REPO_ROOT="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
HUB="${HOME}/.local/share/kvb-hub"
STATE="${HOME}/.local/state/kvb-hub"
APPROVALS="${HOME}/.local/state/kvb-hub-approvals"
APPROVERS="${HOME}/.config/kvb-hub"
UNITS="${HOME}/.config/systemd/user"
# council.py ROOT: every agent must agree on this directory
COUNCIL="${AGENTS_COUNCIL_ROOT:-/tmp/agents-council}"
SETTINGS="${HOME}/.claude/settings.json"
LOCAL_SETTINGS="${HOME}/.claude/settings.local.json"
HOOK_TIMEOUT=110
RUNNER="kvb-hub-runner.service"
IMAGE="kvb-hub:local"
FLOOR_GB=15
FAILED=0
log() { printf '%s\n' "$*"; }
warn() { printf '%s\n' "$*" >&2; }
ok() { printf 'ok %s\n' "$*"; }
todo() { printf 'todo %s\n' "$*"; }
fail() {
printf 'FAIL %s\n' "$*"
FAILED=1
}
port_of() {
sed -n 's/^KVB_HUB_PORT=//p' "$1"
}
install_hub() {
command -v docker &>/dev/null || {
warn "skills: docker not found; skipped the kvb-hub review hub."
return 0
}
local port
port="$(port_of "${REPO_ROOT}/hub/.env")"
log "skills: starting the kvb-hub review hub on http://localhost:${port}/"
rm -rf "${HUB}"
mkdir -p "${HUB}" "${STATE}" "${APPROVALS}" "${COUNCIL}" "${HOME}/.claude/projects" "${HOME}/Repositories" "${HOME}/.local/share/worktrees" "${UNITS}" "${APPROVERS}"
chmod 700 "${APPROVERS}"
cp -a "${REPO_ROOT}/hub/." "${HUB}/"
chmod +x "${HUB}/client/permission_hook.py" "${HUB}/client/runner.py" "${HUB}/client/approval.py"
log "skills: the kvb-hub PermissionRequest hook client is ${HUB}/client/permission_hook.py"
log "skills: approvals need a pinned passkey: hub settings, 'Passkey registrieren', then 'make hub-pin CREDENTIAL=<blob>'; until then every executor refuses"
printf 'KVB_HUB_USER=%s:%s\nKVB_HUB_STATE=%s\nKVB_HUB_COUNCIL=%s\nKVB_HUB_SKILLS=%s\nKVB_HUB_PROJECTS=%s\nKVB_HUB_REPOS=%s\nKVB_HUB_WORKTREES=%s\nKVB_HUB_TIMERS=%s\nKVB_HUB_APPROVERS=%s\n' \
"$(id -u)" "$(id -g)" "${STATE}" "${COUNCIL}" "${HOME}/.claude/skills" "${HOME}/.claude/projects" "${HOME}/Repositories" "${HOME}/.local/share/worktrees" "${UNITS}" "${APPROVERS}" >>"${HUB}/.env"
if ! docker compose --file "${HUB}/compose.yml" up -d --build; then
warn "skills: docker compose failed; the kvb-hub stays down until 'make hub-install' succeeds."
fi
if ! command -v claude &>/dev/null; then
warn "skills: claude not found; skipped registering the kvb-hub MCP server."
return 0
fi
claude mcp remove --scope user kvb-hub &>/dev/null || true
if claude mcp add --transport http --scope user kvb-hub "http://127.0.0.1:${port}/mcp"; then
log "skills: registered the kvb-hub MCP server for Claude Code at user scope"
else
warn "skills: registering the kvb-hub MCP server for Claude Code failed."
fi
}
runner() {
if ! systemctl --user show-environment &>/dev/null; then
warn "skills: no systemd user session; the kvb-hub runner is off and approved operator commands wait."
return 1
fi
cp -f "${HUB}/systemd/${RUNNER}" "${UNITS}/"
systemctl --user daemon-reload
systemctl --user enable "${RUNNER}"
systemctl --user restart "${RUNNER}"
log "skills: the kvb-hub runner service runs the operator commands approved in the hub ($(systemctl --user is-active "${RUNNER}"))"
}
check_keys() {
local file="${APPROVERS}/approvers.json"
if [[ ! -f "${file}" ]]; then
todo "no pinned passkey: hub settings, 'Passkey registrieren', then make hub-pin CREDENTIAL=<blob>"
return 0
fi
local modes
modes="$(stat -c '%a' "${APPROVERS}" "${file}" | paste -sd ' ')"
if [[ "${modes}" == "700 600" ]]; then
ok "pinned keys $(python3 -c 'import json,sys; print([c["alg"] for c in json.load(open(sys.argv[1]))["credentials"]])' "${file}") (modes ${modes})"
else
fail "pinned key modes are ${modes}, expected 700 600"
fi
}
check() {
local port code free
port="$(port_of "${HUB}/.env")"
if docker run --rm "${IMAGE}" --help >/dev/null; then ok "image ${IMAGE} imports every module"; else fail "image ${IMAGE} does not start"; fi
if docker compose --file "${HUB}/compose.yml" ps --status running --services | grep -qx hub; then ok "container running"; else fail "container not running"; fi
if docker compose --file "${HUB}/compose.yml" logs --tail 200 2>&1 | grep -q Traceback; then
fail "traceback in the hub log:"
docker compose --file "${HUB}/compose.yml" logs --tail 30
else
ok "no traceback in the last 200 log lines"
fi
code="$(curl -s -o /dev/null -w '%{http_code}' "http://localhost:${port}/" || true)"
if [[ "${code}" == "200" ]]; then ok "http://localhost:${port}/ answers 200"; else fail "http://localhost:${port}/ answers ${code}"; fi
check_keys
if grep -qs 'kvb-hub/client/permission_hook.py' "${SETTINGS}" "${LOCAL_SETTINGS}"; then
ok "PermissionRequest hook registered"
else
todo "PermissionRequest hook missing: make hub-hook"
fi
if [[ "$(systemctl --user is-active "${RUNNER}" 2>/dev/null || true)" == "active" ]]; then
ok "runner active; last lines:"
journalctl --user -u "${RUNNER}" -n 10 --no-pager
else
todo "runner off: make hub-runner"
fi
free="$(df --output=avail -BG / | tail -1 | tr -dc '0-9')"
if ((free >= FLOOR_GB)); then ok "/ has ${free} GB free"; else fail "/ has ${free} GB free, floor ${FLOOR_GB} GB"; fi
return "${FAILED}"
}
pin() {
[[ -n "${1:-}" ]] || {
warn "usage: make hub-pin CREDENTIAL=<blob from 'Passkey registrieren'>"
exit 2
}
python3 "${HUB}/client/approval.py" pin --port "$(port_of "${HUB}/.env")" --approvers "${APPROVERS}/approvers.json" --credential "$1"
check_keys
return "${FAILED}"
}
hook() {
local command
command="python3 \"${HUB}/client/permission_hook.py\" --port $(port_of "${HUB}/.env") --timeout ${HOOK_TIMEOUT} --approvers \"${APPROVERS}/approvers.json\" --replay \"${APPROVALS}/hook.json\""
[[ -f "${SETTINGS}" ]] && cp -p "${SETTINGS}" "${SETTINGS}.before-kvb-hub-hook"
python3 - "${SETTINGS}" "${command}" "$((HOOK_TIMEOUT + 10))" <<'PY'
import json, os, sys
from pathlib import Path
path, command, timeout = Path(sys.argv[1]), sys.argv[2], int(sys.argv[3])
settings = json.loads(path.read_text(encoding="utf-8")) if path.exists() else {}
mode = path.stat().st_mode & 0o777 if path.exists() else 0o600
entries = settings.setdefault("hooks", {}).setdefault("PermissionRequest", [])
entries[:] = [entry for entry in entries if not any("kvb-hub/client/permission_hook.py" in hook.get("command", "") for hook in entry.get("hooks", []))]
entries.append({"matcher": "Bash", "hooks": [{"type": "command", "command": command, "timeout": timeout}]})
temporary = path.with_name(f"{path.name}.{os.getpid()}")
temporary.write_text(json.dumps(settings, indent=2, ensure_ascii=False) + "\n", encoding="utf-8")
temporary.chmod(mode)
temporary.replace(path)
PY
log "skills: registered the kvb-hub PermissionRequest hook in ${SETTINGS} (copy before: ${SETTINGS}.before-kvb-hub-hook); restart Claude Code to load it"
}
case "${1:-}" in
install) install_hub ;;
check) check ;;
pin) pin "${2:-}" ;;
runner) runner ;;
hook) hook ;;
*)
warn "usage: hub.sh install | check | pin <blob> | runner | hook"
exit 2
;;
esac