Webhook Transforms

Contract

This skill guarantees:

• External events are transformed into brain pages with proper citations
• Raw payloads are preserved (dead-letter queue if transform fails)
• Entity extraction runs on every transformed event
• Input sanitization: no raw HTML/script passes to brain pages
• Error handling: transform failure logs raw payload, retries once

Phases

1. Define transform. Map event schema to brain page format:

   • Input: raw webhook payload (JSON)
   • Output: brain page content (markdown) + metadata (slug, type, citations)
   • Must sanitize: strip HTML tags, escape script content

2. Register webhook URL. Provide the external service with the webhook endpoint.

3. On event received:

   • Parse payload
   • Run transform function
   • Write brain page via gbrain put
   • Extract entities, run enrichment
   • Add timeline entries to mentioned entities
   • Sync: gbrain sync

4. Error handling:

   • If transform throws: log raw payload to _dead-letter/{timestamp}.md
   • Surface error type to agent
   • Retry once
   • Don't lose events

Example Transforms

SMS Received

Input: {from: "+1555...", body: "Meeting …