Code RoomClient-trusted loot values
HardPrep Room Coding #4306

Client-trusted loot values

Vibe & agenticSecuritySenior–Staff~20 min

An AI assistant wrote this server endpoint (Go) for an online RPG's loot pickup. It validates the request shape and exists on the server, so it looks safe — but players are duping legendary items and granting themselves gold. Review the handler and explain why server-side ≠ authoritative here.

Implement
resolve_pickup(world_drops: list[str], request: str) → str
Examples
in[["d1|sword_of_dawn|legendary|50|0|p1","d2|health_potion|common|5|1|p2"],"p1|d1|sword_of_dawn|legendary|50"]out"granted|sword_of_dawn|legendary|50"
in[["d1|sword_of_dawn|legendary|50|0|p1","d2|health_potion|common|5|1|p2"],"p1|d1|crown_of_gods|mythic|999999"]out"granted|sword_of_dawn|legendary|50"
What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it (tests, edge cases, reading critically), and how you’d re-prompt or decompose to get it right.

0:00 of about 20 min

Vibe & agentic: describe the solution in plain language (or narrate it) and the coach grades your approach.

Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.