market-monitor

name	market-monitor
description	Watch any URL for meaningful changes — price moves, new releases (semver), hiring signals, content diffs, keyword appear/disappear — and alert. Use when tracking competitors, releases, or job postings, or detecting content changes on a web page.
category	research
maturity	stable
tags	["url-monitoring","content-diff","release-watch","hiring-signal","cron"]

Market Monitor Skill

Use when: watching competitors, tracking releases, monitoring job postings, or detecting content changes on any URL with intelligent signal extraction.

Add a monitor

node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/add-monitor.cjs \
  --name "Name" --url "https://..." --type <type> [options]

Types

• price-change — extracts price values, alerts on change. Use --price-regex "\$[\d,]+"
• release-watch — detects new version strings (semver)
• hiring-signal — detects new job titles on careers pages
• content-diff — diffs full page content, alerts on significant change (>3 lines)
• keyword-watch — watches for keywords appearing/disappearing. Use --keywords "word1,word2"

Type-specific options

Type	Required option
price-change	--price-regex "\$[\d,]+" (optional, has default)
keyword-watch	--keywords "kw1,kw2,kw3" (required)

Optional flags

• --interval <minutes> — check interval (default: 60)
• --disabled — add in disabled state

Examples

# Price tracking
node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/add-monitor.cjs \
  --name "Competitor Pricing" --url "https://competitor.com/pricing" \
  --type price-change --price-regex "\$[\d,]+" --interval 60

# Release tracking
node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/add-monitor.cjs \
  --name "My Lib Releases" --url "https://github.com/owner/repo/releases" \
  --type release-watch --interval 120

# Hiring signals
node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/add-monitor.cjs \
  --name "OpenAI Careers" --url "https://openai.com/careers" \
  --type hiring-signal --interval 240

# Keyword watch
node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/add-monitor.cjs \
  --name "HN mentions" --url "https://news.ycombinator.com" \
  --type keyword-watch --keywords "sqlite,htmx,openclaw"

List monitors

node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/list-monitors.cjs

Cron

Runs every 30 minutes. Each monitor has its own interval (checked against last_checked).

Cron entry:

*/30 * * * * /usr/bin/node ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/monitor.cjs >> ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/monitor.log 2>&1

Config

${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/config.json

Snapshots

${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/snapshots/<id>.txt Plain text (HTML stripped), one snapshot per monitor. Created on first run as baseline.

Alert cooldown

2 hours per monitor ID. Stored in ${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/state.json.

Alert channels

• Telegram: config.telegram.chatId
• ntfy: config.ntfy.server + config.ntfy.topic

Log

${MARKET_MONITOR_HOME:-$HOME/projects/market-monitor}/monitor.log