CommunityJev Integrations & Adapters
Ad Spend Guard
A pre-bid spend guard that scores a placement's expected relevance and flags whether it matches the campaign brief, letting deterministic code hold budget back before the auction instead of gating the creative itself.
- Published by
- Community
- Author
- Policy Decks
- Last verified
- Oct 2026
- Languages
- TypeScript
- Capabilities
- Open sourceRequires API key
Highlights
- Gates spend allocation against a brief rather than gating the creative against policy.
- Returns a relevance score and a Noul match probability, leaving caps and bid floors in code.
- Runs on a pre-bid cache so its own latency never sits inline in the auction path.
- Falls back to the prior deterministic rule whenever confidence drops below the floor.
Watch out
It layers a contextual relevance judgment over existing budget rules and is not a bidder; the shipped auction harness is a simulation, so measure on your own contexts.
Questions about this entry
Short answers drawn from the linked project or page.
For each candidate placement or creative, Jev scores expected relevance on an ordered scale and returns a Noul for whether the line item matches the campaign's brief, so code can hold budget back before the auction.
Those gate a creative against policy. This one gates spend allocation: given a brief and a placement context, it decides whether the impression is worth the bid, not whether the creative is acceptable.
In code. The guard only returns relevance and a match probability; the daily-cap, bid-floor, and hold rules are deterministic policy the operator writes and can audit.
It is designed to run on a pre-bid cache, scoring contexts ahead of the auction rather than inline, which the README calls out as the reason its own latency is not the budget-critical number.
A confidence below the configured floor falls back to the previous deterministic rule, so the guard widens or narrows a campaign rather than becoming a single point of failure.
TypeScript on Node 22 or newer and a TypeSafe key. The repo ships a simulated auction harness so a threshold change can be measured against a fixed context set.
Reactions & coverage
Posts, threads, and videos about this entry from around the web.
Hacker News: Show HN: Ad Spend Guard gates budget before the auction, not the creative after.
Show HN: Gating ad budget with a decision modelRead the thread on Hacker NewsYouTube: Building a contextual brand-safety scorer on Jev from scratch.
X: Field Advisory sends marginal readings to an agronomist instead of a spray.
This post couldn't be loaded here — read it on X.https://x.com/agriwisehq/status/2781000000000000003More Jev resources like this
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