Agent skill · nousresearch
product-price-monitor
Watch product, flight, or listing prices; alert on target.
What it needs
About 2k tokens when loaded.
What this skill does
Product Price Monitor Monitor a concrete purchasable item and alert on a normalized all-in price or availability condition. Handle variants, taxes, fees, currencies, stock, cancellation terms, and duplicate alerts explicitly. Setup runs once in the foreground; the recurring check runs as a cronjob tick (the price-watch automation blueprint scaffolds this). When to Use "Alert me when this laptop drops below $1,000." "Watch these flights for a fare under $500." "Tell me when this hotel has a refundable room." "Track ticket/listing availability." A cron tick fires for an existing price watch (steps 4-6). Don't use for: one-off "what does this cost right now" lookups (use websearch/webextract directly). Procedure — Setup (foreground, once) 1. Define the exact item Record source URL/provider, product/listing ID where available, variant, quantity, location, dates, travelers/guests, membership/login assumptions, condition, seller, and acceptable substitutes. Done when two variants cannot be confused. 2. Define the alert condition Specify currency, all-in vs pre-tax price, maximum price, availability/stock rule, shipping, refundability, cabin/room/ticket class, cooldown, and notification destination. Done when synthetic examples have deterministic alert decisions. 3. Establish a live baseline, then schedule Fetch a bounded live result with webextract or browsernavigate and record retrieval time, source price, fees/taxes, availability, and terms. Do not schedule until one foreground fetch works. Write the watch contract (item, condition, baseline observation) to a state file under ~/.hermes/price-watches/<watch-slug>.json, then create the job: Pick a cadence that respects rate limits and site terms. Done when the baseline matches the exact item contract and the job exists. Procedure — Tick (each scheduled run) 4. Fetch and normalize Re-fetch the source. Convert currency only with a timestamped rate and retain the source currency. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills nousresearch/product-price-monitor