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#!/bin/bash |
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# BeforeTool hook for Gemini. Checks scuttlebot for operator instructions before |
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# each tool call and returns a blocking decision when the session nick is |
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# explicitly mentioned. |
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SCUTTLEBOT_CONFIG_FILE="${SCUTTLEBOT_CONFIG_FILE:-$HOME/.config/scuttlebot-relay.env}" |
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if [ -f "$SCUTTLEBOT_CONFIG_FILE" ]; then |
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set -a |
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. "$SCUTTLEBOT_CONFIG_FILE" |
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set +a |
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fi |
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if [ -n "${SCUTTLEBOT_CHANNEL_STATE_FILE:-}" ] && [ -f "$SCUTTLEBOT_CHANNEL_STATE_FILE" ]; then |
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set -a |
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. "$SCUTTLEBOT_CHANNEL_STATE_FILE" |
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set +a |
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fi |
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SCUTTLEBOT_URL="${SCUTTLEBOT_URL:-http://localhost:8080}" |
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SCUTTLEBOT_TOKEN="${SCUTTLEBOT_TOKEN}" |
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SCUTTLEBOT_CHANNEL="${SCUTTLEBOT_CHANNEL:-general}" |
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SCUTTLEBOT_HOOKS_ENABLED="${SCUTTLEBOT_HOOKS_ENABLED:-1}" |
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sanitize() { |
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local input="$1" |
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if [ -z "$input" ]; then |
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input=$(cat) |
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fi |
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printf '%s' "$input" | tr -cs '[:alnum:]_-' '-' |
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} |
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normalize_channel() { |
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local channel="$1" |
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channel="${channel//[$' \t\r\n']/}" |
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channel="${channel#\#}" |
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printf '%s' "$channel" |
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} |
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relay_channels() { |
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local raw="${SCUTTLEBOT_CHANNELS:-$SCUTTLEBOT_CHANNEL}" |
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local IFS=',' |
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local item channel seen="" |
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read -r -a items <<< "$raw" |
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for item in "${items[@]}"; do |
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channel=$(normalize_channel "$item") |
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[ -n "$channel" ] || continue |
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case ",$seen," in |
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*,"$channel",*) ;; |
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*) |
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seen="${seen:+$seen,}$channel" |
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printf '%s\n' "$channel" |
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;; |
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esac |
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done |
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} |
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contains_mention() { |
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local text="$1" |
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[[ "$text" =~ (^|[^[:alnum:]_./\\-])$SCUTTLEBOT_NICK($|[^[:alnum:]_./\\-]) ]] |
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} |
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epoch_millis() { |
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local at="$1" ts_secs ts_frac ts_clean frac |
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ts_frac=$(printf '%s' "$at" | grep -oE '\.[0-9]+' | head -1) |
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ts_clean=$(printf '%s' "$at" | sed 's/\.[0-9]*//' | sed 's/\([+-][0-9][0-9]\):\([0-9][0-9]\)$/\1\2/') |
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ts_secs=$(date -j -f "%Y-%m-%dT%H:%M:%S%z" "$ts_clean" "+%s" 2>/dev/null || \ |
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date -d "$ts_clean" "+%s" 2>/dev/null) |
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[ -n "$ts_secs" ] || return |
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if [ -n "$ts_frac" ]; then |
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frac="${ts_frac#.}000" |
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printf '%s%s' "$ts_secs" "${frac:0:3}" |
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else |
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printf '%s000' "$ts_secs" |
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fi |
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} |
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now_millis() { |
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python3 -c "import time; print(int(time.time()*1000))" 2>/dev/null || \ |
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date +%s%3N 2>/dev/null || \ |
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printf '%s000' "$(date +%s)" |
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} |
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base_name=$(basename "$(pwd)") |
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base_name=$(sanitize "$base_name") |
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session_raw="${SCUTTLEBOT_SESSION_ID:-${GEMINI_SESSION_ID:-$PPID}}" |
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if [ -z "$session_raw" ] || [ "$session_raw" = "0" ]; then |
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session_raw=$(date +%s) |
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fi |
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session_suffix=$(printf '%s' "$session_raw" | sanitize | cut -c 1-8) |
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default_nick="gemini-${base_name}-${session_suffix}" |
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SCUTTLEBOT_NICK="${SCUTTLEBOT_NICK:-$default_nick}" |
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[ "$SCUTTLEBOT_HOOKS_ENABLED" = "0" ] && { echo '{}'; exit 0; } |
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[ "$SCUTTLEBOT_HOOKS_ENABLED" = "false" ] && { echo '{}'; exit 0; } |
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[ -z "$SCUTTLEBOT_TOKEN" ] && { echo '{}'; exit 0; } |
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state_key=$(printf '%s' "$SCUTTLEBOT_NICK|$(pwd)" | cksum | awk '{print $1}') |
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LAST_CHECK_FILE="/tmp/.scuttlebot-last-check-$state_key" |
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last_check=0 |
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if [ -f "$LAST_CHECK_FILE" ]; then |
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last_check=$(cat "$LAST_CHECK_FILE") |
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# Migrate from second-precision to millisecond-precision on first upgrade. |
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if [ "$last_check" -lt 100000000000 ] 2>/dev/null; then |
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last_check=$((last_check * 1000)) |
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fi |
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fi |
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now=$(now_millis) |
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echo "$now" > "$LAST_CHECK_FILE" |
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BOTS='["bridge","oracle","sentinel","steward","scribe","warden","snitch","herald","scroll","systembot","auditbot","claude"]' |
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instruction=$( |
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for channel in $(relay_channels); do |
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messages=$(curl -sf \ |
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--connect-timeout 1 \ |
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--max-time 2 \ |
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-H "Authorization: Bearer $SCUTTLEBOT_TOKEN" \ |
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"$SCUTTLEBOT_URL/v1/channels/$channel/messages" 2>/dev/null) || continue |
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[ -n "$messages" ] || continue |
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echo "$messages" | jq -r --argjson bots "$BOTS" --arg self "$SCUTTLEBOT_NICK" --arg channel "$channel" ' |
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.messages[] |
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| select(.nick as $n | |
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($bots | index($n) | not) and |
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($n | startswith("claude-") | not) and |
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($n | startswith("codex-") | not) and |
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($n | startswith("gemini-") | not) and |
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$n != $self |
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) |
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| "\(.at)\t\($channel)\t\(.nick)\t\(.text)" |
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' 2>/dev/null |
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done | while IFS=$'\t' read -r at channel nick text; do |
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ts=$(epoch_millis "$at") |
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[ -n "$ts" ] || continue |
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[ "$ts" -gt "$last_check" ] || continue |
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contains_mention "$text" || continue |
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printf '%s\t[#%s] %s: %s\n' "$ts" "$channel" "$nick" "$text" |
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done | sort -n | tail -1 | cut -f2- |
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) |
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[ -z "$instruction" ] && { echo '{}'; exit 0; } |
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echo "{\"decision\": \"block\", \"reason\": \"[IRC instruction from operator] $instruction\"}" |
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exit 0 |
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