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Code RoomWebSocket frame parsing incomplete
HardPrep Room Coding #4288

WebSocket frame parsing incomplete

Vibe & agenticNetworking & APIsSenior~20 min

An AI wrote this TypeScript handler to decode incoming WebSocket frames in a Node server. Most messages work; some large or split messages come out mangled. Explain the framing bug(s), the trigger, and the fix.

Implement
websocket_frame_length(header: list[int]) → int
Examples
in[[129,133]]out11
in[[129,254,1,44]]out308
in[[129,126,1,44]]out304
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.