feat: add issue reminder bot

.github/scripts/issue_reminder_no_pr.sh

@@ -0,0 +1,140 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Env:
+#   GH_TOKEN  - provided by GitHub Actions
+#   REPO      - owner/repo (fallback to GITHUB_REPOSITORY)
+#   DAYS      - reminder threshold in days (default 7)
+
+REPO="${REPO:-${GITHUB_REPOSITORY:-}}"
+DAYS="${DAYS:-7}"
+
+if [ -z "$REPO" ]; then
+  echo "ERROR: REPO environment variable not set."
+  exit 1
+fi
+
+echo "------------------------------------------------------------"
+echo " Issue Reminder Bot (No PR)"
+echo " Repo:      $REPO"
+echo " Threshold: $DAYS days"
+echo "------------------------------------------------------------"
+echo
+
+NOW_TS=$(date +%s)
+
+# Cross-platform timestamp parsing (Linux + macOS/BSD)
+parse_ts() {
+  local ts="$1"
+  if date --version >/dev/null 2>&1; then
+    date -d "$ts" +%s      # GNU date (Linux)
+  else
+    date -j -f "%Y-%m-%dT%H:%M:%SZ" "$ts" +"%s"   # macOS/BSD
+  fi
+}
+
+# Fetch open ISSUES (not PRs) that have assignees
+ISSUES=$(gh api "repos/$REPO/issues" \
+  --paginate \
+  --jq '.[] | select(.state=="open" and (.assignees | length > 0) and (.pull_request | not)) | .number')
+
+if [ -z "$ISSUES" ]; then
+  echo "No open issues with assignees found."
+  exit 0
+fi
+
+for ISSUE in $ISSUES; do
+  echo "============================================================"
+  echo " ISSUE #$ISSUE"
+  echo "============================================================"
+
+  ISSUE_JSON=$(gh api "repos/$REPO/issues/$ISSUE")
+  ASSIGNEES=$(echo "$ISSUE_JSON" | jq -r '.assignees[].login')
+
+  if [ -z "$ASSIGNEES" ]; then
+    echo "[INFO] No assignees? Skipping."
+    echo
+    continue
+  fi
+
+  echo "[INFO] Assignees: $ASSIGNEES"
+  echo
+
+  # Check if this issue already has a reminder comment from ReminderBot
+  EXISTING_COMMENT=$(gh api "repos/$REPO/issues/$ISSUE/comments" \
+    --jq ".[] | select(.user.login == \"github-actions[bot]\") | select(.body | contains(\"ReminderBot\")) | .id" \
+    | head -n1)
+
+  if [ -n "$EXISTING_COMMENT" ]; then
+    echo "[INFO] Reminder comment already posted on this issue."
+    echo
+    continue
+  fi
+
+  # Get assignment time (use the last assigned event or issue creation time)
+  ASSIGN_TS=$(gh api "repos/$REPO/issues/$ISSUE/events" \
+    --jq ".[] | select(.event==\"assigned\") | .created_at" \
+    | tail -n1)
+
+  if [ -z "$ASSIGN_TS" ]; then
+    echo "[WARN] No assignment event found, falling back to issue creation."
+    ASSIGN_TS=$(echo "$ISSUE_JSON" | jq -r '.created_at')
+  fi
+
+  ASSIGN_TS_SEC=$(parse_ts "$ASSIGN_TS")
+  DIFF_DAYS=$(( (NOW_TS - ASSIGN_TS_SEC) / 86400 ))
+
+  echo "[INFO] Assigned/Created at: $ASSIGN_TS"
+  echo "[INFO] Days since assignment: $DIFF_DAYS"
+
+  # Check if any open PRs are linked to this issue
+  PR_NUMBERS=$(gh api \
+    -H "Accept: application/vnd.github.mockingbird-preview+json" \
+    "repos/$REPO/issues/$ISSUE/timeline" \
+    --jq ".[] 
+          | select(.event == \"cross-referenced\") 
+          | select(.source.issue.pull_request != null) 
+          | .source.issue.number" 2>/dev/null || true)
+
+  OPEN_PR_FOUND=""
+  if [ -n "$PR_NUMBERS" ]; then
+    for PR_NUM in $PR_NUMBERS; do
+      PR_STATE=$(gh pr view "$PR_NUM" --repo "$REPO" --json state --jq '.state' 2>/dev/null || true)
+      if [ "$PR_STATE" = "OPEN" ]; then
+        OPEN_PR_FOUND="$PR_NUM"
+        break
+      fi
+    done
+  fi
+
+  if [ -n "$OPEN_PR_FOUND" ]; then
+    echo "[KEEP] An OPEN PR #$OPEN_PR_FOUND is linked to this issue → skip reminder."
+    echo
+    continue
+  fi
+
+  echo "[RESULT] No OPEN PRs linked to this issue."
+
+  # Check if threshold has been reached
+  if [ "$DIFF_DAYS" -lt "$DAYS" ]; then
+    echo "[WAIT] Only $DIFF_DAYS days (< $DAYS) → not yet time for reminder."
+    echo
+    continue
+  fi
+
+  echo "[REMIND] Issue #$ISSUE assigned for $DIFF_DAYS days, posting reminder."
+
+  # Post reminder comment
+  MESSAGE="Hi, this is ReminderBot. This issue has been assigned but has had no pull request created. Are you still planning on working on the issue?
+
+From the Python SDK Team"
+
+  gh issue comment "$ISSUE" --repo "$REPO" --body "$MESSAGE"
+
+  echo "[DONE] Posted reminder comment on issue #$ISSUE."
+  echo
+done
+
+echo "------------------------------------------------------------"
+echo " Issue Reminder Bot (No PR) complete."
+echo "------------------------------------------------------------"

.github/workflows/bot-issue-reminder-no-pr.yml

@@ -0,0 +1,31 @@
+name: bot-issue-reminder-no-pr
+
+on:
+  schedule:
+    - cron: "0 10 * * *"
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  issues: write
+  pull-requests: read
+
+jobs:
+  reminder:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Harden the runner
+        uses: step-security/harden-runner@df199fb7be9f65074067a9eb93f12bb4c5547cf2
+        with:
+          egress-policy: audit
+
+      - name: Checkout repository
+        uses: actions/checkout@11bd71901afe3a2e8f79ce2a49e69702a58361bd
+
+      - name: Post reminder on assigned issues with no PRs
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          REPO: ${{ github.repository }}
+          DAYS: 7
+        run: bash .github/scripts/issue_reminder_no_pr.sh

CHANGELOG.md

@@ -7,6 +7,7 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 ## [Unreleased]
 
 ### Added
+
 - Modularized `transfer_transaction_fungible` example by introducing `account_balance_query()` & `transfer_transaction()`.Renamed `transfer_tokens()` → `main()`
 - Phase 2 of the inactivity-unassign bot:Automatically detects stale open pull requests (no commit activity for 21+ days), comments with a helpful InactivityBot message, closes the stale PR, and unassigns the contributor from the linked issue.
 - Added **str**() to CustomFixedFee and updated examples and tests accordingly.
@@ -19,11 +20,12 @@ This changelog is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.
 - Made custom fraction fee end to end
 - feat: AccountCreateTransaction now supports both PrivateKey and PublicKey [#939](https://github.com/hiero-ledger/hiero-sdk-python/issues/939)
 - Added Acceptance Criteria section to Good First Issue template for better contributor guidance (#997)
-- Added __str__() to CustomRoyaltyFee and updated examples and tests accordingly (#986)
+- Added **str**() to CustomRoyaltyFee and updated examples and tests accordingly (#986)
 - Restore bug and feature request issue templates (#996)(https://github.com/hiero-ledger/hiero-sdk-python/issues/996)
 - Support selecting specific node account ID(s) for queries and transactions and added `Network._get_node()` with updated execution flow (#362)
 - Add TLS support with two-stage control (`set_transport_security()` and `set_verify_certificates()`) for encrypted connections to Hedera networks. TLS is enabled by default for hosted networks (mainnet, testnet, previewnet) and disabled for local networks (solo, localhost) (#855)
 - Add PR inactivity reminder bot for stale pull requests `.github/workflows/pr-inactivity-reminder-bot.yml`
+- Added Issue Reminder (no-PR) bot, `.github/scripts/issue_reminder_no_pr.sh` and `.github/workflows/bot-issue-reminder-no-pr.yml` to automatically detect assigned issues with no linked pull requests for 7+ days and post a gentle ReminderBot comment.(#951)
 
 ### Changed