Add summarize-group script to fetch and summarize weekly posts

Fetches group config from prod DB, retrieves posts via Slashwork
GraphQL API, filters by week, and pipes to Claude CLI for summary.
Supports current/previous/weekXX week selection.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hubyrod

summarize-group.sh

@@ -0,0 +1,190 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Usage: ./summarize-group.sh <group-name> [week] [post-count]
+#   week: "current" (default), "previous", or "weekXX" (e.g. week03, week52)
+# Examples:
+#   ./summarize-group.sh skjs
+#   ./summarize-group.sh skjs previous
+#   ./summarize-group.sh skjs week12
+#   ./summarize-group.sh skjs current 100
+
+GROUP_NAME="${1:?Usage: ./summarize-group.sh <group-name> [current|previous|weekXX] [post-count]}"
+WEEK_ARG="${2:-current}"
+POST_COUNT="${3:-100}"
+
+# Compute week start (Monday) and end (Sunday 23:59:59) as ISO timestamps
+compute_week_range() {
+  local week_arg="$1"
+  local year week_num monday_date sunday_date
+
+  year=$(date +%Y)
+
+  case "$week_arg" in
+    current)
+      # Current ISO week number
+      week_num=$(date +%V)
+      ;;
+    previous)
+      # Go back 7 days, get that week number
+      week_num=$(date -v-7d +%V 2>/dev/null || date -d "7 days ago" +%V)
+      # Handle year boundary (if previous week is in last year)
+      local prev_year
+      prev_year=$(date -v-7d +%Y 2>/dev/null || date -d "7 days ago" +%Y)
+      year="$prev_year"
+      ;;
+    week[0-9][0-9])
+      week_num="${week_arg#week}"
+      ;;
+    *)
+      echo "Error: invalid week argument '$week_arg'" >&2
+      echo "Use 'current', 'previous', or 'weekXX' (e.g. week03, week52)" >&2
+      exit 1
+      ;;
+  esac
+
+  # Strip leading zero for arithmetic
+  local wn=$((10#$week_num))
+  if [ "$wn" -lt 1 ] || [ "$wn" -gt 53 ]; then
+    echo "Error: week number must be between 01 and 53, got '$week_num'" >&2
+    exit 1
+  fi
+
+  # macOS date: compute Monday of ISO week
+  # Jan 4 is always in ISO week 1. Find Monday of week 1, then offset.
+  local jan4_dow
+  jan4_dow=$(date -j -f "%Y-%m-%d" "${year}-01-04" +%u 2>/dev/null)
+  if [ -n "$jan4_dow" ]; then
+    # macOS date
+    local jan4_epoch
+    jan4_epoch=$(date -j -f "%Y-%m-%d" "${year}-01-04" +%s)
+    local week1_monday_epoch=$(( jan4_epoch - (jan4_dow - 1) * 86400 ))
+    local target_monday_epoch=$(( week1_monday_epoch + (wn - 1) * 7 * 86400 ))
+    local target_sunday_epoch=$(( target_monday_epoch + 6 * 86400 ))
+    monday_date=$(date -r "$target_monday_epoch" +%Y-%m-%d)
+    sunday_date=$(date -r "$target_sunday_epoch" +%Y-%m-%d)
+  else
+    # GNU date fallback
+    monday_date=$(date -d "${year}-01-04 -$(date -d "${year}-01-04" +%u) days + 1 day + $((wn - 1)) weeks" +%Y-%m-%d)
+    sunday_date=$(date -d "$monday_date + 6 days" +%Y-%m-%d)
+  fi
+
+  WEEK_START="${monday_date}T00:00:00Z"
+  WEEK_END="${sunday_date}T23:59:59Z"
+  WEEK_LABEL="week ${week_num} ${year} (${monday_date} → ${sunday_date})"
+}
+
+compute_week_range "$WEEK_ARG"
+
+# Load .env
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+if [ -f "$SCRIPT_DIR/.env" ]; then
+  set -a
+  source "$SCRIPT_DIR/.env"
+  set +a
+fi
+
+DB_URL="${POSTGRESQL_ADDON_URI:?Missing POSTGRESQL_ADDON_URI in .env}"
+GRAPHQL_URL="${SLASHWORK_GRAPHQL_URL:?Missing SLASHWORK_GRAPHQL_URL in .env}"
+
+# Fetch group ID and auth token from the prod DB
+DB_ROW=$(psql "$DB_URL" -t -A -F '|' -c "
+  SELECT g.slashwork_id, at.token
+  FROM groups g
+  JOIN auth_tokens at ON g.auth_token = at.name
+  WHERE g.name = '$GROUP_NAME'
+")
+
+if [ -z "$DB_ROW" ]; then
+  echo "Error: group '$GROUP_NAME' not found in database" >&2
+  echo "Available groups:" >&2
+  psql "$DB_URL" -t -A -c "SELECT name FROM groups ORDER BY name" >&2
+  exit 1
+fi
+
+GROUP_ID=$(echo "$DB_ROW" | cut -d'|' -f1)
+AUTH_TOKEN=$(echo "$DB_ROW" | cut -d'|' -f2)
+
+echo "Fetching posts from '$GROUP_NAME' for $WEEK_LABEL..." >&2
+
+QUERY='query FetchGroupPosts($groupId: ID!, $first: Int!) {
+  fetch__Group(id: $groupId) {
+    name
+    posts(first: $first) {
+      edges {
+        node {
+          id
+          markdown
+          created
+          author { id name }
+          comments(first: 100) {
+            edges {
+              node {
+                markdown
+                created
+                author { name }
+                replies(first: 100) {
+                  edges {
+                    node {
+                      markdown
+                      created
+                      author { name }
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}'
+
+PAYLOAD=$(jq -n \
+  --arg query "$QUERY" \
+  --arg groupId "$GROUP_ID" \
+  --argjson first "$POST_COUNT" \
+  '{query: $query, variables: {groupId: $groupId, first: $first}}')
+
+RESPONSE=$(curl -s -f "$GRAPHQL_URL" \
+  -H "Content-Type: application/json" \
+  -H "Authorization: Bearer $AUTH_TOKEN" \
+  -d "$PAYLOAD")
+
+# Check for API errors
+API_ERRORS=$(echo "$RESPONSE" | jq -r '.errors // [] | .[].message' 2>/dev/null)
+if [ -n "$API_ERRORS" ]; then
+  echo "GraphQL error: $API_ERRORS" >&2
+  exit 1
+fi
+
+# Extract and format messages, filtering by week date range
+MESSAGES=$(echo "$RESPONSE" | jq -r --arg start "$WEEK_START" --arg end "$WEEK_END" '
+  [(.data.fetch__Group.posts // {edges:[]}).edges[].node
+   | select(.created >= $start and .created <= $end)]
+  | if length == 0 then empty else
+    .[] |
+    "--- \(.author.name) [\(.created)] ---\n\(.markdown)\n" +
+    ([(.comments // {edges:[]}).edges[].node |
+      "  > \(.author.name) [\(.created)]:\n  \(.markdown)\n" +
+      ([(.replies // {edges:[]}).edges[].node |
+        "    >> \(.author.name) [\(.created)]:\n    \(.markdown)"
+      ] | join("\n"))
+    ] | join("\n"))
+  end
+')
+
+if [ -z "$MESSAGES" ]; then
+  echo "No messages found in group '$GROUP_NAME' for $WEEK_LABEL"
+  exit 0
+fi
+
+POST_TOTAL=$(echo "$RESPONSE" | jq --arg start "$WEEK_START" --arg end "$WEEK_END" '
+  [(.data.fetch__Group.posts // {edges:[]}).edges[].node | select(.created >= $start and .created <= $end)] | length
+')
+echo "Found $POST_TOTAL posts for $WEEK_LABEL" >&2
+
+SUMMARY=$(echo "$MESSAGES" | claude -p "Summarize the following messages from the '$GROUP_NAME' group for $WEEK_LABEL. Give a concise overview of the key topics, decisions, and action items discussed:")
+
+echo "$SUMMARY"