whetstone_DSL/tmp_eval_large_specs_20260303/cp_031_node.md

Chat Server (cp_031)

Objective

Build a websocket chat server with rooms, presence, typing indicators, and message history.

Language & Library Constraints

• Primary language: node
• Available libraries: express, zod, prisma, bullmq
• Use library APIs explicitly where suitable in execution contracts.

Acceptance

• Deterministic taskitems with strict execution contracts.
• Include selected library and preferred APIs when applicable.