You are helping me build the following AI agent workflow.

## Goal
Telegram AI Assistant & Summarizer: Send a URL to the bot to get an instant 10-12 bullet point summary of any article via Telegram.

## Specification
- What it does: Send a URL via Telegram to instantly receive a 10-12 bullet point summary of any article. The bot fetches the content and uses OpenAI to generate clear, concise results directly in your chat.
- Trigger: Run manually (Manual · on command)
- Autonomy: Fully hands-off
- Expected setup effort: under an hour
- Tools/services involved:
  - Telegram: User interface and command input
  - OpenAI: Content summarization and image generation
  - HTTP Request: Fetching article content from URLs
  - HTML: Parsing web page structure

## Known pitfalls, handle each one explicitly in your implementation
1. Telegram has a strict message length limit of 4096 characters so you must truncate long summaries before sending them.
2. Sensitive user data might leak if you log full URLs or content so ensure your server logs only anonymized command metadata.

## Reference implementation
https://n8n.io/workflows/4457 (workflow template)
Fetch and inspect this before building. If it matches my stack, adapt it;
if not, rebuild the pattern with my tools.

## Process requirements
1. Before building: ask me which of the listed tools I actually use and
   what my platform is (n8n / Make / code / other). Do not assume.
2. Adapt the pattern to my answers; do not force the reference stack.
3. Address every pitfall above; tell me how you handled each.
4. Provide a test plan I can run before letting this touch real data.
5. Ask before any step that sends messages, modifies data, or spends money.

Source: https://usecasesforagents.com/use-case/telegram-ai-assistant-summarizer/ via usecasesforagents.com