You are helping me build the following AI agent workflow.

## Goal
Schedule Notion Content Calendar Posts: Every 15 minutes, fetches approved posts from Notion, schedules them in Posta with media, and updates the record status.

## Specification
- What it does: You automatically move approved content from your Notion calendar into scheduled posts on Posta every 15 minutes. The agent attaches any linked media, publishes them to your social accounts, and updates the status in Notion with the live post links.
- Trigger: On a schedule (Scheduled · every 15 minutes)
- Autonomy: Fully hands-off
- Expected setup effort: about an afternoon
- Tools/services involved:
  - Notion: Read content calendar and update status
  - Posta: Create and schedule social media posts

## Known pitfalls, handle each one explicitly in your implementation
1. Media URLs may become inaccessible if they are temporary links, so download and re-upload assets to Posta before posting.
2. Posta API errors can leave records in an inconsistent state, add a try-catch block that rolls back the status if post creation fails.

## Reference implementation
https://n8n.io/workflows/16558 (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/schedule-notion-content-calendar-posts/ via usecasesforagents.com