Flight Fare Watch

Flight Fare Watch monitors fares for a route and date against a target price you set, and tells you when the fare hits it. You give it the fare offers and your target. It computes the lowest and average fare, the change and trend against a previous observation, and whether your target has been met. All of that is deterministic — the alert decision in particular is code, not judgement. A language model only phrases the message, and it never decides whether to alert and never invents a price. The read-only guarantee is the point of the design. It never books, never purchases, and there is no code path that could. It watches and tells you; the decision and the transaction stay with you. Every alert carries a fare volatility note, because a fare that met your target ten minutes ago may not still be there — and an alerting tool that omits that is setting you up for a disappointing checkout page. `evaluate_threshold` runs the trigger logic alone with no network and no model, which is what you want when the fares are already in hand and you just need the verdict. `validate_alert` checks that a result is internally consistent — that the trigger genuinely matches the lowest fare against the target — which is an unusual and welcome thing for an agent to expose. The hosted version works on offers you pass in, so it runs with no setup. The repository also ships a read-only fare client if you want to wire a live source yourself. Built for travel managers, frequent bookers and anyone tracking a route who would rather be told than keep checking.