Site Change Detector

Field	Value
Name	`site-change-detector`
Category	monitoring
Complexity	moderate
Tags	web-monitoring, change-detection, llm-analysis, s3-storage, postgres-state
Author	randybias
Min Version	0.1.0

Description

Monitor web pages for changes, store snapshots in S3, and deliver LLM-summarized change alerts to Slack. Fetches configured URLs on a schedule, diffs against stored snapshots, uses Claude to summarize what changed and why it matters, and notifies via Slack.

DAG Structure

fetch-pages → diff-snapshots → summarize-changes → notify-slack

Node	Purpose
`fetch-pages`	Fetch configured web pages
`diff-snapshots`	Compare current content against stored snapshots in S3
`summarize-changes`	AI-powered summarization of detected changes
`notify-slack`	Deliver change summaries to Slack

Triggers

manual
cron — every 4 hours (0 */4 * * *)

Dependencies

Service	Type	Required
Anthropic API	External	Yes
Slack webhook	External	Yes
tentacular-postgres	Exoskeleton	Yes
tentacular-rustfs	Exoskeleton	Yes
Probe targets (monitored URLs)	Dynamic	Yes

Config

Key	Default	Description
`timeout`	`120s`	Per-node timeout
`retries`	`1`	Retry count per node
`urls`	`[https://example.com]`	List of URLs to monitor
`s3_bucket`	`tentacular`	S3 bucket for snapshot storage

Secrets

anthropic.api_key — Claude API key for change summarization
slack.webhook_url — Slack webhook for change alerts

Usage

tntc scaffold init site-change-detector
tntc scaffold init site-change-detector my-custom-name
tntc scaffold info site-change-detector

Source

Scaffold source: quickstarts/site-change-detector/